hydraulic seals · u-rings are among the most important seals used in hydraulics and pneumatics....

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Hydraulic seals

1

Contents

2 U-rings

3 Materials

5 General notes for installation

6 Installation housing

8 Overview of U-rings

10 Individual description

58 Wipers

59 Materials

61 Installation

62 Overview of Wipers


102 Hydraulic piston seals (overview)


114 Hydraulic rod seals (overview)


128 Guide strips (overview)

130 PTFE seals

HydrauliC SealS

The purpose of this catalogue is to present standard seals dimensions.

For information about stock availabilities, please contact our sales department.

We are able to supply other dimensions required.

2

U-rings are among the most important seals used in hydraulics and pneumatics. Their main function is to seal the cylinder on the piston or piston rod. Whether in an unpressurised state or under pressure, they prevent the medium escaping from the cylinder, thus ensuring the cylinder function.

The characteristics which distinguish U-rings are on the one hand the geometry of the diameter - here a distinction is always made between symmetric and asymmetric designs -but also in the shape and final processing of the sealing lips.

Symmetrical U-rings can be used as piston seals as well as piston rod seals. Asymmetrical U-rings are designed only as piston or piston rod seals. They are optimally adapted to the applications.

The function that all U-rings have in common is diameter energising. The oversized lips allow them to be pressed on to the surrounding sealing surface when built-in, creating linear force around the circumference: in the seal groove and on the dynamic side of the seal, the piston rod and/or the running surface of the cylinder.

The U-ring’s sealing function is guaranteed even in this unpressurized state. The hydraulic liquid is held back at the sealing site which enables a further increase in pressure. This pressure build-up results in the hydraulic contact pressure of the medium against the seal lips overriding the energising factor. The movement of the dynamic side completes the sealing mechanism. The higher the liquid pressure, the more intensive the contact pressure of the seal on the surrounding surfaces and the greater the sealing function.

Materials, design and placing sequence must be adapted to the varying requirements. Whether a U-ring should be made of pure elastomer or whether it should have a support ring, if necessary integrated in a fabric back, depends on the design of the particular cylinder in question.

Different U-ring geometries and materials should be chosen for heavy-duty applications with high safety aspects and little movement, e.g. in derrick cylinders for cranes or hydraulic cylinders in barrages, than those required for working cylinders of earth-moving machinery where the focus is on high resistance to wear. Totally different designs and materials to those used in hydraulics are on the other hand required for pneumatic cylinders.

The requirements of the task and the possibilities of the U-ring must be carefully balanced as these have a decisive influence on the selection of the seal and the resulting operating safety of the system.

u-ringS

3

acrylonitrile-butadiene caoutchouc — nBr

NBR is the most commonly used material in all areas of seal technology due to its good physical and mechanical characteristics and its excellent processing abilities. For U-rings it is used in hardnesses between 75 and 90 Shore A and for O-rings as energising elements it is generally used in 70 Shore A.

This elastomer has the rigidity, hardness and abrasion resistance necessary for U-rings.

NBR is resistant to most oils and mineral oil based fats used in hydraulics and also to their emulsions with water.

NBR materials have only moderate resistance against weathering and ozone influences if they are not specially developed for these applications. However, the standard resistance is sufficient for most applications of U-rings and their energising elements made of NBR as with typical applications in hydraulics, the elastomer surfaces are moistened with oil or fat. These media form a stable surface protective layer and minimise the intensity of ozone influence.

Generally, the standard NBR90 quality which is used for most U-rings can be applied at temperatures from -30° C to +100° C. The temperature application limits for NBR 70 O-rings as energising elements in U-rings is also from -30° C to +100° C but under special circumstances for both parts a temperature as low as -40° C is still acceptable.

NBR is processed in moulding tools in various compression and vulcanising processes to form U-rings or O-rings.

Fabric materialsFabric materials are textiles or non-specific fibrous materials which are impregnated with elastomer materials.

With textiles that have a woven structure, a distinction is made according to the thickness or weight per surface area, known as grammage. Another distinguishing characteristic is the basic material these textiles are made of, e.g. cotton or synthetic fibre. Cotton textile impregnated with NBR is most frequently used for the production of standard U-rings. Apart from the standard materials, there is a whole range of other textiles available and almost all elastomers for impregnation.

Impregnated fabric materials have numerous advantages over pure elastomers. The most important are, compressive creep resistance, extrusion safety, dimensional stability and low friction and wear behaviour. They also show little inclination to swelling in hydraulic media and are well-suited to applications at low temperatures.

In a two-stage process, the fabric materials are preprocessed into slugs and then vulcanised into seals in a compression moulding die with heat application. A multi-component seal can be produced out of pure elastomer which is moulded on.

PolyurethanePolyurethane is one of the group of elastic thermoplastic materials which have been established in seal technology for many years due to their physical characteristics and efficient processing features. Polyurethan at a hardness range of between 65 and 98 Shore A is used.

Among the most important material characteristics are its great tensile strength, good wear resistance, good flexibility at a temperature range from -40° C to +100° C and also good ageing stability against ozone. The mineral oil based oils and fats used in hydraulics have a minimal influence on the physical properties of Polyurethane.

Materials

4

Polyurethane TPu92TPU92, with very few exceptions, in the polyurethane used for U-rings. The characteristics of this type of material unite the appropriate rigidity, hardness and in particular, abrasion resistance necessary for U-rings. The injection moulding process applied in most cases requires complex machinery and moulding tools and for this reason is most appropriate for large-scale production.

Polytetrafluorethylene (PTFE)PTFE has numerous positive characteristics which have become indispensable in seal technology. In particular, we would like to emphasise the characteristics which are essential for its application as U-ring material:

PTFE is distinguished by exceptional rigidity and very good gliding characteristics. Due to its extremely low surface energy, it has a very low coefficient of friction (values of under 0.02 are known) and exceptional non-bonding, non-wettable contact surfaces. In addition, its extreme hydrophobia must be mentioned: PTFE is absolutely water-repellent.

It is resistant to almost all chemicals and remains stable within an extremely wide temperature range. Apart from this, it is immune to attack by oxygen, ozone or ultra-violet rays and is therefore completely resistant to weathering.

PTFE does not contain any extractable media which could drift off and adversely affect adjacent materials. It is therefore physiologically completely harmless in contact with foodstuffs and also particularly well-suited for applications in the pharmaceutical and medicinal fields.

Combined with different compounds, PTFE has proved to be excellent material for U-rings. In particular, PTFE/carbon with a 15% - 25% proportion of carbon improves the wear resistance of the material which already has excellent gliding characteristics. The pressure hardness is also increased by this additive.

PTFE alone is only slightly elastic. For this reason the activation of U-rings is compensated with elastic energising elements in the form of stainless steel springs.

Polyoxymethylene POMPolyoxymethylene is a thermoplastic material and is distinguished by its particularly high pressure load bearing ability, rigidity and hardness.

Apart from its application as a pure material, POM can be compounded with extenders to further improve the compressive creep resistance and wear resistance which results in a longer service life. Due to POM’s low water absorption it is not subjected to any volume change which is not always the case with thermoplastics.

Due to its excellent characteristics under extreme loads, POM is often processed as a seal accompanying element, e.g. as a support ring or a piston guiding element with an angular design.

With a temperature range from -40°C to +100° C, POM can be used in almost all standard seal application areas.

Polyoxymethylene is processed by injection moulding in most cases. The slugs can also be processed in a chip removal process.

FKM fluorcaoutchoucThe FKM elastomer is distinguished by its excellent chemical and temperature resistance (from -20° C to +200° C). It therefore plays an important part as a U-ring material outside the standard.

Due to the above characteristics it is essential to use FKM when extremely high temperatures occur in the surrounding of the hydraulic cylinder and highly flammable type D liquids have to be used.

FKM is generally used in 90 Shore A and can also be processed in combination with metal.

5

Although the materials used in our U-rings are particularly effective and robust, special care is still required during installation in order to avoid mechanical damage especially to the sealing lip. This would inevitably lead to leakage. Furthermore, the U-rings should be checked prior to installation for damage or ageing that could have occurred during transportation or storage. To ensure safe installation, the following precautions should be taken:

1. Installation of the seal must take place with the prestressed side facing the direction of pressure. Particular care must be taken with compact U-rings as the prestressed side is not always easily recognisable.

2. Lead-in chamfers on the cylinder and on the piston rod are essential. The recommended lengths and angles are given in the installation dimensions for the various U-rings in this catalogue.

3. Sharp edges must be deburred and radii and chamfers applied in accordance with the installation guidelines.

4. Dust, dirt, metal chips and any other foreign particles must be carefully removed.

5. Tips of screws and grooves for guide elements, etc. should be covered using an installation cone, as the seal must not be pushed over gaps, drillings or rough surfaces.

6. Cylinders, rods, seals and installation tools must be greased or oiled before installation, giving consideration to compatibility with the medium.

7. Materials are made smoother and expand a great deal more easily for installation if they are heated in oil or hot water at approx. 80°C, giving consideration to the resistance.

8. Any tools used for installation, e.g. cones and mandrels for expansion, should be made of soft material (e.g. POM) and not have any sharp edges.

general notes for installation

6

The function and service life of a hydraulic or pneumatic cylinder depend to a great extent on the sealing elements used. During operation, these are subject to various stresses and must therefore be adapted to the different requirements in terms of material, structure and arrangement. The key criteria are media compatibility and temperature resistance, pressure, friction, wear resistance, stroke speed and frequency as well as service life. Seals, grooves and wipers should already be selected in the construction phase of the cylinder so that the finish of the metal surfaces and the design and dimensions of the grooves can be carefully manufactured in accordance with the installation housing guidelines.

Rounded corners in the groove base (1) ensure the correct position of the U-ring and rounded flanks of the groove’s edges (2) minimise the risk of the seal moving into the metal gap. The suitable surface finish of the groove base (3) and the groove flanks (4), adherence to the tolerances for the

groove width (5), the lead-in chamfer (6) and the dimensions of the seal gap on the side opposite the pressure (7), as well as the surface finish of the opposed surface (8), play a major role in ensuring the optimal service life of the seals.

U-rings can generally be installed in cut housing grooves. However, wider profiles and particularly small inner diameters require an axial opening to the housing. The fit must be taken into consideration accordingly, which requires special experience. Should you require advice, please contact our technical department.

Sufficient guiding for the pistons and the piston rods must be ensured, as seals can never perform guiding tasks.

Wipers ensure that no foreign particles enter the medium system of a cylinder that could destroy the seals. In order to retain a clean system and to protect the environment against oil pollution, no hydraulic cylinder should be used without a wiper.

installation housings

8

Overview of u-rings

Design

Ref. Pressure (bar)

Temp. (°C)

Speed (m/s)

Materials Dimensions metr. inch

Page

HPRS MA21

Piston/Rod seal

160 -30 +100

0,5 NBR90 ■ ■ 10

HPRS MA22

Piston/Rod seal

100 -30 +100

0,5 NBR90 ■ ■ 18

HPS MA23 Piston seal 160 -30 +100

0,5 NBR90 ■ ■ 22

HRS MA24 Rod seal 160 -30 +100

0,5 NBR90 ■ ■ 26

HPS MA31 Piston seal 40 -30+100

0,5 NBR90 ■ ■ ASK

HRS MA32 Rod seal 40 -30+100

0,5 NBR90 ■ ■ ASK


0,5 NBR90 ■ ASK

HPRS MA25

Piston-/Rod seal

300 -40 +100

0,5 TPU92 ■ ■ 28


0,5 TPU92 ■ 34

HRS MA30 Rod seal 400 - 40 +100

0,5 TPU92 ■ ■ 38

9

Overview of u-rings

Design

Ref. Pressure (bar)

Temp. (°C)

Speed (m/s)

Materials Dimensions metr. inch

Page


0,5 TPU92 ■ ■ 42

HPRS MA36

Piston/Rodseal

400 -40 +100

0,5 TPU92 ■ 45


0,5 TPU92 ■ ■ 48

HPS MA40 Piston seal 400 - 30+100

0,5 TPU92/POM ■ ■ ASK


0,5 TPU92/POM ■ 52

HPRS MA42

Piston-/Rodseal

400 -40 +100

0,5 TPU92/NBR 70 ■ ASK


0,5 TPU92/NBR/POM ■ ■ ASK

HRS MA43 Rod seal 350 -150 +250

15 PTFE-compounds spring steel AISI 301

■ 54


15 PTFE-compounds spring steel AISI 301

■ 56

10

HPrS Ma21

piston and piston rod seal with symmetrical

sealing lips which are cut at an angle of less

than 45°.

Standard materialNBR90

Area of application

Hydraulics and pneumatics

reciprocating movements

FunctionThe HPRS MA21 is a single function piston seal

in the form of a U-ring which can be used as a

piston and piston rod seal due to its symmetrical

sealing lips. Its sealing function is very effective

due to the sealing lips being provided with

radial self energising which is activated by the

system pressure.

MediaHydraulic oils acc. DIN 51524/51525,

lubricating oils, mineral oil based

lubricating fats, non-flammable

hydraulic fluids HFA, HFB, HFC acc.

VDMA 24317.

Operational application limitsPressure (MPa/bar): 16/160

Temperature (°C): –30 to + 100

Running speed (m/s): = 0.5

installationThe HPRS MA21, with an inner diameter of

25 mm and a thinner profile can always be

installed in cut housing. With an inner diameter

of less than 25 mm, we recommend axially

accessible housing. To push the piston body

and seal into the cylinder pipe or over the

piston rod without damaging it, a lead-in

chamfer C acc. to the following table is

required:

Profile width (mm) Lead-in chamfer C (mm)

4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10

If the housing is provided with a metallic

fitting on the side opposite the pressure, the

service life of the seal is lengthened. Within the

operating parameters given above, depending

on the pressure, a metallic wedge can be fitted

between the cylinder pipe and piston acc. to

the following table:

Pressure (MPa) Radial wedge G (mm)

5 0.2

10 0.15

16 0.1

The piston diameter d1 should generally be by

factor 0.65 of the profile smaller than the DN

diameter provided.

Please also follow the general installation

instructions.

remarksIn addition, we are able to supply other

dimensions required. For operating conditions

other than the standard applications, further

elastomers are available.

11

Dimensions in mm Dimensions in mm Dimensions in mmØdN ØDN H L ØdN ØDN H L ØdN ØDN H L

HPrS Ma21

Sizes metric

3 10 6 74 7.5 3 44 10 4 54 10 4.5 5.54 10 5 64 11 8 94 12 4 54 12 5.5 6.55 11 5 65 11 7 85 12 5 65 12 5.5 6.55 12 6 75 13 4 55 13 6 75 14 4.5 5.55 14 6 75 15 5 66 10 3 46 12 4 56 12 4.5 5.56 12 5 66 12 5.5 6.56 12 6 76 12 6.5 7.56 12 7 8

6 14 4 56 15 5 66 15 8 96 15 9 106 16 5 66 16 6 76 17 6 76 18 8 96 20 8 97 15 4 57 15 5 67 15 7 87 15 8 98 12 5 68 14 4 58 14 5 68 14 6 78 14 7 88 15 4 58 15 6 78 15 8 98 15 9 108 16 4 58 16 6 78 16 8 98 18 5 6

8 18 6 78 18 8 98 18 9 108 18 10 118 20 6 78 22 7 88 22 8 98 22 9 108 25 6 79 15 8 99 17 4 59 18 5 69 19 6 79 19 7 89.5 30 10 1110 16 4 510 16 5 610 16 6 710 18 4 510 18 5 610 18 6 710 18 7 810 18 8 910 18 9 1010 20 5 610 20 6 7

12


HPrS Ma21

Sizes metric

10 20 7 810 20 8 910 20 9 1010 22 6 710 22 7 810 22 8 910 22 9 1010 25 7.5 8.510 25 10 1110 26 8 910 26 9.5 10.510 28 10 1110 30 10 1110 32 10 1111 26 8 911 27 8 911.5 21.5 7 812 18 4 512 18 5 612 18 6 712 18 7 812 20 4 512 20 5 612 20 8 912 20 9 1012 22 5 612 22 6 712 22 7 812 22 8 912 22 9 1012 24 6 712 24 8 912 24 9 1012 24 10 1112 25 8 912 25 9 1012 25 10 1112 25 11 1212 26 10 1112 28 10 1112 32 10 1112 35 12 1312.7 19 5 613 23 5 613 25 8 913 25 10 1113 30 9 1013 30 10 1113 35 15 1613 36 12 1314 20 5 614 20 6 714 22 4 514 22 5 614 22 6 714 22 7 814 22 8 914 22 9 1014 22 12 1314 24 5 614 24 6 714 24 8 914 24 9 1014 26 6 714 28 7 8

14 28 10 1114 32 8 914 32 10 1115 20 3 415 22 4 515 25 5 615 25 6 715 25 8 915 25 9 1015 25 10 1115 27 6 715 27 7 815 28 8 915 28 10 1115 28 11 1215 30 6 715 30 7.5 8.515 30 8 915 30 10 1115 35 10 1116 22 3 416 22 4 516 22 4.5 5.516 22 5 616 22 5.5 6.516 22 6 716 24 4 516 24 5 616 24 6 716 24 9 1016 24 10 1116 25 5 616 25 8 916 26 5 616 26 6 716 26 8 916 26 9 1016 26 10 1116 28 6 716 28 7 816 28 7.5 8.516 32 8 916 32 9 1016 32 10 1116 32 11 1216 35 9 1016 36 10 1117 25 4 517 25 10 1117 32 7 817 35 6 717 38 10 1118 25 5 618 25 5.5 6.518 26 4 518 26 5 618 26 6.5 7.518 26 7.5 8.518 26 8 918 26 8.5 9.518 26 9.5 10.518 28 5 618 28 6 718 28 8 918 28 10 11

18 30 6 718 30 7.5 8.518 30 8 918 30 8.5 9.518 30 9 1018 30 10 1118 32 7 818 34 8 918 34 12 1318 35 10 1118 35 12 1318 36 6 718 38 10 1118 40 10 1118 40 11 1219 25 6 719 34 10 1119 37 10 1120 25 3 420 27 6 720 28 4 520 28 5 620 28 8 920 28 9 1020 29 5 620 29 5.5 6.520 30 5 620 30 6 720 30 8 920 30 9 1020 30 10 1120 30 11 1220 32 6 720 32 7.5 8.520 32 8 920 32 8.5 9.520 33 6 720 35 7.5 8.520 35 10 1120 35 12 1320 35 13 1420 36 8 920 36 10 1120 38 9 1020 39 10 1120 40 5 620 40 10 1120 40 11 1220 40 12 1320 43 12 1320 45 12 1321 33 6 721 37 12 1322 28 5 622 28 8 922 28 9 1022 30 4 522 30 5 622 30 6 722 30 7 822 30 10 1122 32 5 622 32 6 722 32 7 822 32 8 9

13


HPrS Ma21

Sizes metric

22 32 9 1022 32 10 1122 32 11 1222 34 6 722 34 10 1122 35 10 1122 35 11 1222 37 10 1122 38 10 1122 42 10 1122 46 12 1323 33 5 623 35 6 723 35 10 1123 38 10 1123.5 31.5 5 624 32 4 524 32 7 824 32 8 924 34 5 624 34 10 1124 36 6 724 36 7.5 8.524 40 8 924 40 9 1024 40 10 1124 40 12 1325 32 7 825 33 4 525 33 5 625 33 7 825 35 5 625 35 5.5 6.525 35 6 725 35 7 825 35 8 925 35 9 1025 35 10 1125 35 11 1225 37 6 725 37 7 825 38 7 825 38 9 1025 38 10 1125 38 11 1225 39 7 825 40 7.5 8.525 40 8 925 40 10 1125 40 11 1225 42 8 925 45 10 1125 45 12 1325 47 12 1325 50 10 1125 50 12 1326 34 4 526 35 5 626 36 5 626 36 6 726 36 7 826 38 6 726 42 8 926 46 10 1126 47 12 13

26 56 14 1527 35 4 527 36 6 727 38 6 727 42 10 1128 35 5 628 35 5.5 6.528 35 6 728 35.5 5 628 36 4 528 36 5 628 36 6 728 36 6.5 7.528 36 7.5 8.528 38 5 628 38 6 728 38 7 828 38 8 928 38 9 1028 38 10 1128 40 6 728 40 7.5 8.528 40 10 1128 41 6 728 43 10 1128 44 8 928 47 10 1128 48 10 1128 48 12 1329 37 4 530 37 6 730 37 8 930 38 4 530 38 5 630 38 6 730 38 6.5 7.530 38 7 830 38 12 1330 40 5 630 40 5.5 6.530 40 6 730 40 6.5 7.530 40 7 830 40 9 1030 40 10 1130 40 11 1230 40 11.5 12.530 42 6 730 42 9 1030 42 10 1130 42 11 1230 43 6.5 7.530 45 7.5 8.530 45 9 1030 45 10 1130 45 11 1230 47 10 1130 50 10 1130 50 11 1230 50 12 1330 50 13 1430 52 11 1230 55 12 1330 60 15 1631 38 7 8

31.5 41.5 6 731.5 44.5 6 732 40 4 532 40 5 632 40 5.5 6.532 40 6 732 40 7 832 40 8 932 40 10 1132 42 5 632 42 6 732 42 10 1132 42 11 1232 44 6 732 44 7.5 8.532 45 10 1132 45 11 1232 47 10 1132 50 10 1132 50 12 1332 50 13.5 14.532 52 10 1132 58 13 1433 43 5 633 43 6 733 45 6 733 55 12 1334 44 5 634 45 7 834 45 8 934 45 9 1034 46 8 934 50 15 1634 74 10 1135 42 8 935 43 7 835 45 5 635 45 6 735 45 8 935 45 9 1035 45 10 1135 45 11 1235 47 6 735 48 10 1135 48 11 1235 50 7 835 50 7.5 8.535 50 9 1035 50 9.5 10.535 50 10 1135 50 11 1235 52 10 1135 52 12 1335 55 10 1135 55 11 1235 55 12 1335 55 13 1435 60 12 1335.5 45 6 735.5 45.5 6 736 45 10 1136 46 5 636 46 7 836 46 8 936 46 10 11

14


HPrS Ma21

Sizes metric

36 48 6 736 48 7.5 8.536 50 8 936 51 7.1 8.136 51 7.5 8.536 51 10 1136 52 10 1136 55 10 1136 70 10 1138 45 5 638 45 5.5 6.538 45 6 738 46 6.5 7.538 46 7.5 8.538 46 12 1338 48 5 638 50 6 738 50 9 1038 50 10 1138 50 12 1338 52.5 9 1038 52.5 9.5 10.538 53 10 1138 55 10 1138 55 11 1238 58 10 1138 58 11 1238 58 12 1338 60 12 1338 74 6 739.7 51 8 940 48 5 640 48 8 940 48 12 1340 50 5 640 50 6 740 50 6.5 7.540 50 7 840 50 7.5 8.540 50 9 1040 50 10 1140 50 11 1240 52 6 740 52 7 840 52 7.5 8.540 52 10 1140 52 12 1340 55 7.5 8.540 55 9.5 10.540 55 10 1140 55 11 1240 56 8 940 56 10 1140 56 11 1240 58 10 1140 60 10 1140 60 11 1240 60 12 1340 60 13 1440 60 14 1540 60 18 1940 64 12 1340 65 12 1340 65 13 1440 65 15 16

40 70 16 1740 76 12 1341 56 8.5 9.541 56 10 1142 50 5 642 50 6 742 50 8 942 50 9 1042 50 10 1142 52 5 642 52 9 1042 52 10 1142 54 6 742 55 8 942 57 10 1142 62 12 1342 62 15 1642 62 18 1943 50 12 1343 55 6 743 63 10 1144 54 4 544 56 6 744 56 7.5 8.544 57 9 1044 64 10 1145 53 12 1345 55 5 645 55 6 745 55 6.5 7.545 55 7.5 8.545 55 10 1145 55 11 1245 56 7 845 57 6 745 58 10 1145 58 12 1345 60 7.5 8.545 60 9 1045 60 10 1145 60 11 1245 63 9 1045 63 10 1145 63 11 1245 63 12 1345 65 10 1145 65 11 1245 65 12 1345 65 13 1445 75 15 1646 54 6.5 7.546 56 5 646 58 6 746 70 12 1347 65 12 1347 66.7 10 1148 58 10 1148 58 11 1248 60 6 748 60 7.5 8.548 63 9 1048 63 10 1148 63 12 1348 65 10 1148 68 10 11

48 68 12 1350 57 10 1150 60 5 650 60 6 750 60 7 850 60 8 950 60 10 1150 60 11 1250 60 12 1350 62 6 750 62 9 1050 62 10 1150 63 6 750 63 7 850 63 8 950 63 9 1050 63 10 1150 65 7.5 8.550 65 9 1050 65 10 1150 65 11 1250 65 12 1350 68 12 1350 70 8 950 70 10 1150 70 11 1250 70 12 1350 70 18 1950 70 19 2050 72 12 1350 73 13 1450 74 12 1350 75 12 1350 75 15 1650 76 12 1350 90 18 950.9 70 13 1451 60.5 9 1051 63 6 751 64 9 1052 62 12 1352 62 13 1452 64 6 752 64 7.5 8.552 68 8 952 72 12 1352 75 12 1352 80 15 1653 63 5 653 63 6 753 63 6.5 7.553 63 7.5 8.553 65 6 754 66 6 754 72 10 1155 63 12 1355 65 5 655 65 6 755 65 10 1155 65 11 1255 65 12 1355 65 13 1455 67 6 755 68 7.5 8.555 70 7.5 8.5

15


HPrS Ma21

Sizes metric

55 70 9 1055 70 10 1155 70 12 1355 70 13 1455 75 10 1155 75 12 1355 75 13 1455 76 10 1155 80 10 1155 80 12 1355 80 13 1455 80 15 1655 85 10 1155 85 15 1656 66 5 656 66 6 756 70 12 1356 71 10 1156 76 12 1356 80 15 1658 70 6 758 77 9.5 10.558 78 12 1359 80 14 1560 68 8 960 68 12.5 13.560 70 5 660 70 6 760 70 7 860 70 8 960 70 9 1060 70 10 1160 70 12 1360 70 13 1460 71 7 860 72 11 1260 75 7.5 8.560 75 8 960 75 9 1060 75 10 1160 75 11 1260 75 12 1360 75 13 1460 76 8 960 80 10 1160 80 11 1260 80 12 1360 80 13 1460 80 18 1960 80 19 2060 85 12 1360 85 12.5 13.560 85 13.5 14.560 85 15 1660 86.7 15 1660 90 15 1660 90 16 1760 95 13 1461 69 6.5 7.561 80 12 1362 72 12.5 13.563 72 6 763 73 5 663 73 6 763 75 10 11

63 75 11 1263 75 12 1363 78 10 1163 80 12.5 13.563 83 12 1363 83 13 1463 83 15 1663 83 16 1763.5 73.5 9 1064 76 9 1064 80 8 965 73 12 1365 75 5 665 75 6 765 75 10 1165 75 12 1365 75 13 1465 80 7.5 8.565 80 9 1065 80 11 1265 80 12 1365 80 13 1465 82 12 1365 85 10 1165 85 11 1265 85 12 1365 86 12 1365 90 8 965 90 12 1365 90 13 1465 90 15 1665 95 12 1365 95 13 1465 100 12 1366 76 10 1166 77 6 766 80 10 1166 80 11 1267 77 6 767 77 12 1367 77 13 1467 80 12 1368 76 6.5 7.568 80 12 1368 92 15 1670 80 5 670 80 6 770 80 7 870 80 8 970 80 9 1070 80 11 1270 80 12 1370 80 13 1470 81 15 1670 82 12 1370 85 7.5 8.570 85 8 970 85 9 1070 85 10.5 11.570 85 12 1370 85 13 1470 90 10 1170 90 12 1370 90 13 1470 90 15 16

70 90 18 1970 90 19 2070 95 12 1370 95 13 1470 95 15 1670 100 10 1170 100 15 1670 105 10 1171 80 6 772 80 10 1172 80 12 1372 82 5 672 90 10 1172 90 11 1272 90 12 1373 93 11 1275 83 12 1375 85 5 675 85 6 775 85 10 1175 85 12 1375 85 13 1475 90 7.5 8.575 90 8.5 9.575 90 9 1075 90 10 1175 90 10.5 11.575 90 13 1475 95 10 1175 95 12 1375 95 13 1475 95 15 1675 100 15 1675 105 15 1678 88 5 678 93 10.5 11.578 93 11.5 12.578 104 12.5 13.580 90 5 680 90 6 780 90 10 1180 90 11 1280 90 12 1380 90 13 1480 92 10 1180 95 7.5 8.580 95 8 980 95 9 1080 95 12 1380 95 13 1480 100 10 1180 100 11 1280 100 12 1380 100 13 1480 100 15 1680 100 18 1980 101.6 12 1380 105 12 1380 105 15 1680 110 15 1680 110 18 1980 115 12.5 13.582 92 10 1182 92 11 1282 104 12.5 13.5

16


HPrS Ma21

Sizes metric

82 108 12 1383 103 14 1584 103 14 1585 95 7.5 8.585 95 8.5 9.585 95 9 1085 95 12 1385 95 13 1485 100 7.5 8.585 100 9 1085 100 12 1385 100 13 1485 105 10 1185 105 12 1385 105 13 1485 105 15 1685 105 18 1985 110 12 1385 110 15 1685 115 15 1685 115 16 1786 105 16 1786 106 10 1188 96 6.5 7.588 108 12 1389 100 12 1390 98 12 1390 100 5 690 100 8 990 100 9 1090 100 12 1390 100 13 1490 100 15 1690 105 7.5 8.590 105 9 1090 105 12 1390 105 13 1490 110 10 1190 110 12 1390 110 13 1490 110 15 1690 110 18 1990 110 19 2090 112 12 1390 115 12 1390 115 12.5 13.590 115 15 1690 120 15 1690 120 18 1991 99 6.5 7.592.4 102 9.5 10.593 123 15 1694 124 15 1695 103 12 1395 105 5 695 105 11 1295 105 12 1395 110 7.5 8.595 110 9 1095 110 12 1395 110 13 1495 110 15 1695 110 16 1795 112 11 1295 112 12 13

95 115 10 1195 115 12 1395 115 13 1495 115 15 1695 115 18 1995 115 19 2095 120 12 1395 120 13 1495 120 15 1695 125 13 1495 125 15 1696 104 11.5 12.596 105 11 1298 108 10 1198 112 8.5 9.5100 110 5 6100 112 9 10100 114 10 11100 115 7.5 8.5100 115 9 10100 115 12 13100 115 13 14100 115 14 15100 117.5 12 13100 120 10 11100 120 12 13100 120 13 14100 120 15 16100 125 12 13100 125 13 14100 125 15 16100 125 16 17100 125 18 19100 130 15 16100 130 18 19105 120 7.5 8.5105 120 9 10105 120 15 16105 125 12 13105 125 13 14105 125 15 16105 125 16 17105 130 12 13105 130 18 19105 135 18 19106 120 8.5 9.5106 130 18 19107 115 6.5 7.5107 127.4 16 17108 127 9.5 10.5110 125 7.5 8.5110 125 12 13110 125 13 14110 125 15 16110 130 12 13110 130 15 16110 130 16 17110 130 18 19110 130 19 20110 135 12 13110 135 18 19110 140 15 16110 140 18 19111.1 130.1 15 16112 125 9 10

113 125 9.5 10.5113 125 10.5 11.5114 124 10 11115 123 12 13115 125 8 9115 125 15 16115 125 16 17115 126 15 16115 129 13 14115 130 7.5 8.5115 130 15 16115 135 12 13115 135 15 16115 135 16 17115 140 15 16115 140 18 19115 145 12 13115 145 18 19120 130 14 15120 130 15 16120 135 7.5 8.5120 135 10 11120 135 15 16120 135 16 17120 140 10 11120 140 12 13120 140 14 15120 140 15 16120 140 16 17120 145 18 19120 150 15 16120 150 18 19125 140 7.5 8.5125 140 9 10125 140 11 12125 140 12 13125 140 13 14125 140 15 16125 140 16 17125 145 12 13125 145 15 16125 145 16 17125 145 18 19125 145 19 20125 147 12 13125 150 18 19125 154 20 21125 155 15 16125 155 16 17125 155 18 19127 142 12 13127 151 16 17128 158 18 19130 140 15 16130 145 15 16130 150 10 11130 150 12 13130 150 14 15130 150 15 16130 150 16 17130 155 18 19130 160 13 14130 160 15 16130 160 18 19132 144 12 13

17


HPrS Ma21

Sizes metric

133 149 11 12135 143 12 13135 150 9 10135 150 15 16135 160 18 19135 165 12 13135 165 15 16135 165 18 19136 150 8.5 9.5140 154 10 11140 160 8 9140 160 15 16140 165 18 19140 170 15 16140 170 18 19140 175 15 16145 160 8 9145 165 12 13145 165 18 19145 170 18 19145 175 15 16145 175 18 19150 165 16 17150 170 15 16150 170 18 19150 180 15 16150 180 18 19155 163 12 13160 168 12 13160 170 15 16160 175 9 10160 180 15 16160 190 15 16160 190 22 23

160 195 17 18160 200 20 21165 180 9 10168 180 14 15170 200 15 16170 200 20 21170 200 22 23170 210 20 21170 210 22 23175 205 18 19180 210 22 23180 220 22 23185 195 12 13185 200 9 10190 210 15 16190 220 15 16190 220 22 23190 220 25 26195 225 15 16200 230 15 16200 230 22 23200 240 20 21210 250 20 21215 230 7.5 8.5220 250 20 21220 260 20 21225 250 18 19230 260 22 23230 270 20 21240 260 16 17240 270 18 19240 280 20 21250 275 12 13250 290 20 21

255 275 20 21255 280 20 21255 285 20 21255 290 20 21260 300 20 21270 300 20 21270 300 22 23280 300 14 15280 310 15 16280 320 20 21300 325 20 21300 330 20 21300 330 22 23300 340 20 21310 350 20 21320 350 15 16320 350 22 23320 360 20 21335 367 24 25340 380 20 21342 355 22 23350 400 25 26360 420 30 31375 395 12 13375 400 22 23400 450 25 26420 440 20 21420 450 20 21450 500 25 26470 490 20 21470 500 20 21550 600 25 26

18

HPrS Ma22


sealing lips which are cut straight.


area of applicationHydraulics and pneumatics





sealing lips. Its sealing function is very effective

due to the sealing lips being provided with

radial self energising which is activated by

the system pressure. For new design we

recommend HPS MA23 or HRS MA24.





VDMA 24317.




installationThe HPRS MA22, with an inner diameter of


installed in cut housing. With an inner diameter


accessible housing. To push the piston body

and seal into the cylinder pipe or over the

piston rod without damaging it, a lead-in

chamfer C acc. to the following table is

required:


4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10









5 0.2

10 0.15



diameter provided.


instructions.





19


HPrS Ma22

Sizes metric

3 7 5 63 8.5 4 53 10 5 64 10 4 54 10 5 64 11 8 94 12 4 55 11 5 65 12 5 65 14 4.5 5.55 15 5 66 10 4 56 12 4 56 12 6 76 12 8 96 15 5 66 15 6 76 16 5 66 16 6 76 17 6 76 18 8 96 20 8 96 22 8 97 14 3.5 4.57 15 5 68 12 4 58 13 5 68 14 4 58 14 6 78 15 6 78 16 4 58 16 6 78 16 8 98 17 6 78 18 8 9

8 22 8 98 25 6 79 17 6 710 14 2.5 3.510 15 5 610 16 4 510 16 5 610 18 5 610 18 6 710 20 8 910 22 6 710 22 8 910 22 9 1010 25 6 710 25 8 910 25 10 1110 26 8 910 28 8 910 30 10 1110 32 6 710 32 10 1111 17 3.2 4.212 18 4 512 18 5 612 20 5.5 6.512 20 8 912 22 5 612 22 6 712 22 7 812 24 6 712 24 10 1112 25 8 912 26 7 812 26 8 912 26 10 11

12 28 10 1112 30 9 1012 32 10 1112 34 10 1112 35 12 1312 40 10 1112.6 17.5 6.5 7.513 20 3 413 24 6 713 30 10 1114 20 4 514 22 4 514 22 6 714 22 8 914 24 6 714 28 7 814 28 10 1114 30 8 914 32 10 1115 20 3 415 22 4 515 22 5.5 6.515 24 4.5 5.515 24 7 815 25 5 615 25 6 715 28 10 1115 30 8 915 30 10 1115 32 8.5 9.515 35 10 1116 22 6 716 25 5 616 26 5 616 26 6 7

20


HPrS Ma22

Sizes metric

16 27 5.5 6.516 28 6 716 28 9 1016 29 6 716 30 6 716 32 8 916 32 10 1116 32 11 1216 36 10 1116 40 12 1317 35 10 1117 38 10 1118 24 4 518 24 5 618 25 4 518 25 5 618 26 4 518 28 6 718 28 8 918 30 6 718 30 10 1118 32 7 818 34 8 918 35 8.5 9.518 35 12 1318 36 6 718 38 10 1118 40 10 1119 26 5 619 34 8 919 34 10 1120 28 4 520 28 6 720 28 8 920 30 6 720 30 8 920 30 10 1120 32 7.5 8.520 33 6 720 35 10 1120 36 8 920 38 8.5 9.520 38 10 1120 40 10 1120 43 12 1322 28 5 622 28 6 722 30 6 722 30 7.5 8.522 32 5 622 32 6 722 34 6 722 34 10 1122 35 7 822 36 8 922 37 10 1122 38 8 922 38 10 1122 40 10 1122 42 10 1122 46 12 1323 32 5 623 35 10 1123 38 10 1123 43 10 1124 30 5 624 31 5 624 32 4 524 34 5 624 37 6 7

24 40 8 924 40 10 1124 44 10 1124 50 12 1325 32 4 525 33 7 825 35 5 625 35 6 725 35 8 925 36 5 625 38 7 825 38 8 925 40 6 725 40 10 1125 42 8 925 42 8.5 9.525 45 10 1125 45 12 1325 50 10 1125 50 12 1325 52 12 1326 38 6 726 42 8 926 46 10 1127 36 6 727 42 10 1128 38 5 628 38 7 828 43 10 1128 44 8 928 45 10 1128 46 10 1128 48 10 1128 48 12 1329 45 8 930 37 8 930 38 7 830 40 5 630 40 9 1030 41 8 930 42 10 1130 45 10 1130 48 9 1030 50 10 1130 50 12 1330 54 12 1330 55 12 1330 55 15 1630 60 15 1632 40 4 532 40 7 832 42 10 1132 44 6 732 45 6.5 7.532 45 10 1132 47 10 1132 48 8 932 50 9 1032 50 10 1132 52 10 1133 43 6 735 15 5 635 45 6 735 50 8 935 50 10 1135 51 8 935 52 12 1335 55 10 1135 55 12 1335 56 10 11

35 60 12 1336 46 6 736 48 6 736 50 7 836 51 10 1136 55 10 1138 50 6 738 53 10 1138 56 9 1038 58 10 1138 58 12 1338 60 12 1339 45 4 540 46 4 540 48 8 940 48 11 1240 50 5 640 52 8 940 55 10 1140 56 8 940 56 10 1140 58 10 1140 60 10 1140 60 12 1340 62 12 1340 64 12 1340 65 12 1340 70 15 1641 56 10 1142 50 6 742 52 6 742 55 6.5 7.542 57 10 1142 62 10 1142 62 12 1343 63 10 1144 55 6 745 52 8 945 57 6 745 58 6.5 7.545 58 10 1145 60 7 845 60 10 1145 63 10 1145 65 10 1145 65 12 1345 69 12 1345 70 12 1346 70 12 1348 60 6 748 63 10 1148 65 10 1148 68 10 1148 68 12 1348 70 10 1148 72 12 1349 65 8 950 56 8 950 60 10 1150 62 6 750 63 6.5 7.550 65 10 1150 70 7.5 8.550 70 10 1150 70 12 1350 72 12 1350 74 12 1350 75 12 1350 80 15 1651 63 6 7

21


HPrS Ma22

Sizes metric

52 62 6 753 65 10 1155 65 5 655 68 6.5 7.555 70 7.5 8.555 75 10 1155 80 12 1355 85 10 1155 85 15 1656 75 7 856 76 10 1158 70 6 758 78 12 1358 80 10 1160 68 8 960 70 7.5 8.560 74 7 860 75 12 1360 80 10 1160 80 12 1360 84 12 1360 85 12 1360 85 15 1660 90 15 1661 73 6 762 78 8 962 82 10 1162 88 12 1363 73 12 1363 93 15 1664 80 8 965 80 7.5 8.565 85 10 1165 85 12 1365 90 12 1365 95 12 1366 76 10 1168 78 10 1168 80 12 1370 82 12 1370 85 7.5 8.570 90 10 1170 90 12 1370 95 12 1370 100 15 1672 80 10 1172 84 6 774 80 8 974 90 8 975 90 7.5 8.575 95 10 1175 100 12 1375 100 15 1675 105 15 1678 86 8 978 102 12 1380 93 8 980 94 6 780 95 7.5 8.580 100 10 1180 105 12 1380 110 15 1680 110 18 19

80 115 15 1682 100 9 1085 100 7.5 8.585 105 10 1185 105 12 1385 110 12 1385 110 15 1685 115 15 1686 98 12 1388 100 6 790 105 7.5 8.590 110 10 1190 115 12 1390 115 15 1690 120 15 1692 116 12 1395 110 7.5 8.595 115 7.5 8.595 115 10 1195 120 12 1395 125 15 1697 105 8 9100 110 5 6100 120 10 11100 120 18 19100 125 12 13100 130 15 16100 140 20 21105 120 8 9105 125 10 11105 130 12 13106 118 12 13110 125 7.5 8.5110 130 10 11110 135 12 13110 140 15 16110 150 20 21115 140 12 13115 145 12 13120 140 10 11120 150 15 16125 145 10 11125 150 18 19125 155 15 16130 150 10 11130 160 15 16135 150 10 11135 160 12 13135 160 18 19135 165 15 16140 160 10 11140 165 18 19140 170 15 16140 170 20 21140 175 20 21145 170 15 16145 175 15 16150 170 10 11150 180 15 16155 185 15 16160 180 14 15160 185 15 16160 190 15 16

160 200 20 21165 195 15 16170 200 15 16170 200 22 23170 210 20 21175 205 15 16180 200 10 11180 204 12 13180 210 15 16180 210 22 23180 220 20 21185 215 15 16190 220 15 16190 230 20 21195 225 15 16200 220 18 19200 230 15 16200 240 20 21205 230 15 16210 240 20 21210 250 20 21220 250 15 16220 260 20 21225 255 15 16230 255 15 16230 270 20 21235 275 20 21240 272 16 17240 280 20 21250 280 25 26250 290 20 21260 285 12 13260 300 20 21270 310 20 21280 310 15 16280 320 20 21280 330 25 26290 330 20 21300 320 15 16300 330 16 17300 336 18 19300 340 20 21305 355 25 26310 350 20 21330 366 18 19330 370 20 21340 380 20 21350 400 25 26360 400 20 21380 420 20 21390 415 15 16400 430 15 16400 440 20 21400 450 25 26410 450 20 21420 450 15 16440 480 25 26450 500 25 26460 500 20 21510 550 20 21510 580 20 21550 600 25 26580 630 25 26

22

HPS Ma23

piston seal with asymmetrical sealing lips which

are cut at an angle of less than 45°.




Functionhe HPS MA23 is a single function piston seal in

the form of a U-ring. Due to its asymmetrical

sealing lips with a slightly indented outer lip

edge, the energising is guided outwards to

strengthen its sealing function also at low

pressure.





VDMA 24317.




installationThe HPS MA23 can be installed in cut housing.

To push the piston body and seal into the

cylinder pipe without damaging it, a lead-

in chamfer C acc. to the following table is

required:


4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10









8 0.1



diameter provided.


instructions.





23


HPS Ma23

Sizes metric

7.5 4.5 3 49 4 3.5 4.512 6 4 512 8 5 613 7 4 514 6 8 914 8 4.5 5.515 8 5.5 6.515 9 8 916 6 8 916 6 10 1116 8 5.5 6.516 8 6 716 10 4 516 10 6 718 10 5 618 10 5.5 6.520 10 6 720 10 7 820 10 8 920 12 5.5 6.520 12 6.8 7.820 14 4.2 5.220 14 10 1122 13 7 822 14 5.5 6.524 16 5.5 6.525 10 10 1125 15 5 625 15 8 925 17 5.5 6.525 17 6 725 18 5 626 18 5.5 6.526 18 5 6

26 18 7 828 18 8 928 16 9 1028 20 5.5 6.530 16 10 1130 18 8 930 20 5 630 20 7 830 20 8 930 22 5 630 22 5.5 6.530 22 6 731 18 10 1132 22 5 632 22 7 832 24 5.5 6.532 26 5.5 6.533 20 10 1133 25 5 635 20 10 1135 22 10 1135 25 6.5 7.535 25 7 835 25 8 935 27 5 636 24 6 736 26 7 836 28 7 837 21 12 1338 28 7 839 26 9.5 10.539 32 5 640 20 12 1340 25 9 1040 25 10 11

40 27 8 940 27 10 1140 28 10 1140 30 6 740 30 7 840 30 8 940 30 10 1140 32 5.5 6.540 32 8 940 33 8 941 28 10 1142 32 10 1143 25 9 1043 30 10 1143 38 3.8 4.845 28.5 12 1345 30 9 1045 30 10 1145 32 8 945 32 10 1145 35 6 745 35 7 845 37 7 846 36 7 848 38 8 950 30 8 950 30 12 1350 34 10 1150 34 12 1350 35 9 1050 35 10 1150 35 12 1350 36 10 1150 40 5 650 40 6 7

24


HPS Ma23

Sizes metric

50 40 7 850 40 8 950 40 10 1150 42 8 952 42 5 652 36 12 1352 42 7 855 40 10 1155 45 6 755 45 7 855 45 8 955 45 10 1156 40 10 1156 40 12 1356 41 9 1056 41 10 1156 45 7 856 46 6 756 46 7 856 46 8 960 40 12 1360 40 13.5 14.560 44 12 1360 45 10 1160 50 5 660 50 6 760 50 7 860 50 8 960 50 10 1160 52 8 961 45 12 1361 56 8 962 46 12 1362 47 10 1162 52 7 863 45 10 1163 45 12 1363 47 12 1363 48 10 1163 48 12 1363 53 6 763 53 7 863 53 8 963 53 12 1365 45 12 1365 49 12 1365 50 7.93 8.9365 50 9 1065 50 10 1165 53 10 1165 55 6 765 55 7 865 55 8 965 55 10 1165 55 13.5 14.566 50 12 1367 57 7 868 52 8 968 58 7 870 50 14 1570 54 12 1370 55 9.5 10.570 55 10 1170 55 12 1370 58 8.5 9.570 60 6 770 60 7.2 8.270 60 8 970 60 12 1370 60 13.5 14.5

70 62 7.7 8.770 62 8 971 51 12 1371 55 10 1171 55 12 1371 56 9 1071 56 10 1171 60 7 871 61 6 771 61 8 872 58 12 1374 62 8.5 9.575 55 12 1375 59 12 1375 60 10 1175 63 8.5 9.575 65 5 675 65 6 775 65 7.5 8.575 65 8 975 65 10 1175 65 13.5 14.576 60 12 1380 60 10 1180 60 14 1580 63 14 1580 63 16 1780 64 8 980 65 9 1080 65 10 1180 65 12 1380 68 8.5 9.580 70 6 780 70 7.2 8.280 70 8 980 70 12 1380 71 6 780 72 12 1383 71.9 7.5 8.585 65 12 1385 65 13.5 14.585 70 9 1085 70 10 1185 73 8.5 9.585 75 6 785 75 12 1390 68 16.5 17.590 70 12 1390 75 9 1090 75 10 1190 75 12 1390 78 8.5 9.590 80 5 690 80 6 790 80 8 990 80 13 1495 75 12 1395 75 13.5 14.595 75 15 1695 80 9 1095 80 10 1195 85 6.8 7.895 85 7.2 8.295 85 8.5 9.595 85 13.5 14.5100 80 10 11100 80 15 16100 80 13.5 14.5100 85 9 10100 85 10 11

100 85 12 13100 86 12 13100 88 8.5 9.5100 88 10 11100 90 7.2 8.2100 90 8.5 9.5100 90 10.5 11.5100 90 16.5 17.5105 85 15 16105 90 9 10105 90 12 13105 93 8.5 9.5110 90 12 13110 90 15 16110 95 9 10110 95 10 11110 95 12 13110 98 8.5 9.5110 100 5.5 6.5111 95 10 11112 92 12 13112 92 15 16112 97 9 10112 97 10 11112 98 8.5 9.5115 95 14 15115 100 9 10115 100 10.5 11.5120 100 12 13120 100 13.5 14.5120 100 15 16120 103 15.5 16.5120 105 9 10120 105 10 11120 106 8.5 9.5125 95 18 19125 105 12 13125 105 15 16125 105 16 17125 110 9 10125 110 10 11125 112 9 10125 115 7.2 8.2125 115 15 16130 110 12 13130 110 15 16130 110 16 17130 115 9 10130 115 10 11135 115 14 15136 116 14 15140 110 25 26140 115 18 19140 120 10 11140 120 12 13140 120 14 15140 120 16 17140 125 10 11140 127.3 9.52 10.52 145 130 10 11147 120 15 16147 120 18 19150 120 18 19150 125 13.5 14.5150 125 19 20150 125 20 21150 130 12 13150 130 15 16150 130 16 17150 135 8 9

25


HPS Ma23

Sizes metric

150 135 9 10150 135 10 11150 136 8.5 9.5150 140 7.2 8.2150 140 12.5 13.5155 135 15 16157 132 20 21160 130 25 26160 135 19 20160 135 20 21160 140 12 13160 140 13.5 14.5160 140 14 15160 140 15 16160 140 16 17160 145 9 10160 145 10 11160 145 14 15165 140 19 20165 140 20 21170 145 19 20170 145 20 21170 148 15 16170 150 12 13170 150 15 16170 150 16 17170 155 9 10175 145 18 19175 155 14 15175 160 9 10180 150 25 26180 155 19 20180 155 20 21180 160 9 10180 160 14 15180 160 16 17180 165 9 10180 165 10 11185 160 19 20185 160 20 21190 165 16 17190 165 20 21190 170 14 15

190 170 15 16190 170 16 17190 175 10 11200 170 18 19200 175 16 17200 175 19 20200 175 20 21200 180 12 13200 180 14 15200 180 15 16200 180 16 17205 180 19 20205 180 20 21210 185 16 17210 185 20 21210 190 12 13210 190 16 17220 190 18 19220 195 16 17220 195 20 21220 200 12 13220 200 14 15220 200 16 17224 199 16 17224 199 20 21224 204 12 13224 204 16 17225 200 16 17225 200 19 20225 200 20 21225 205 12 13225 205 16 17230 205 16 17230 205 19 20230 210 12 13230 210 16 17240 215 16 17240 215 19 20240 215 20 21240 220 12 13240 220 16 17250 220 18 19250 220 30 31

250 225 16 17250 225 19 20250 225 20 21250 230 12 13250 230 14 15250 230 15 16250 230 16 17260 235 16 17260 235 19 20260 240 12 13260 240 16 17270 245 16 17270 245 19 20270 250 12 13270 250 16 17275 250 19 20275 250 20 21280 250 16 17280 250 18 19280 250 19 20280 255 16 17280 255 19 20280 260 14 15290 265 16 17290 265 19 20297 265 24 25297 265 25 26300 270 12 13300 270 19 20300 270 24 25300 270 25 26300 275 16 17300 280 15 16312 280 24 25320 280 28 29320 290 20 21332 300 24 25360 320 28 29360 330 20 21400 360 28 29400 370 20 21502 482 19 20603 535 15 16

26

HrS Ma24

piston rod seal with asymmetrical sealing lips

which are cut at an angle of less than 45°.




FunctionThe HRS MA24 is a single function piston rod seal

in the form of a U-ring. Due to its asymmetrical

sealing lips with a slightly indented outer lip

edge, the pressure is guided outwards to

strengthen its sealing function at low pressure.





VDMA 24317.




installationThe HRS MA24, from an inner diameter of 25

mm and thin profile can always be installed

in cut housing. With an inner diameter of less

than 25 mm, we recommend axially accessible

housing. To push the cylinder head and seal

over the piston rod without damaging it, a

lead-in chamfer C acc. to the following table is

required:


4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10









5 0.2

10 0.15

11 0.1


instructions.





27


HrS Ma24

Sizes metric

2 4.5 1.7 2.72.5 5 1.7 2.73 6 2.5 3.53 6 3 44 8 3 44 9 3.5 4.54 12 4.5 5.55 9 2.5 3.56 10 3 46 11.5 3.2 4.26 12 4 56 12 4.2 5.26 13 5.5 6.57 11 3.96 58 14 4 58 16 5.5 6.58 16 6 79 15 9 1010 16 4.5 5.510 18 5.5 6.512 18 4.5 5.512 19 4.5 5.512 20 5.5 6.512 22 7.5 8.512 22 8 914 19 3.5 4.514 22 5.5 6.515 23 6 715 25 5 616 20.5 5 616 22 5.5 6.516 22 6.5 7.516 22.5 4.5 5.516 24 5.5 6.516 25 5 616 26 7 816 26 7.5 8.518 25 4.5 5.518 25 5.5 6.518 26 5.5 6.520 28 5.5 6.520 28 6 720 30 6 720 30 7.5 8.520 30 10 1120 32 6 720 32 7.5 8.520 34 8 922 30 5.5 6.522 30 7 822 32 6 724 32 5.5 6.5

25 32 6 725 33 5.5 6.525 33 7.5 8.525 33 8.5 9.525 33 10 1125 35 6 725 35 6.5 7.525 35 7 825 35 7.5 8.525 35 8 925 35 10 1125 37 6 725 40 10 1128 36 5.5 6.528 36 5.7 6.728 38 6 728 38 7 828 38 8 928 38 10 1130 37 7 830 38 6.3 7.330 40 6 730 40 7 830 40 8 930 42 8.5 9.532 42 7 832 48 8 934 44 7 835 45 6 735 45 7 835 45 8 935 50 8 936 46 7 836 46 8 936 46 10 1140 48 8 940 50 5.5 6.540 50 7 840 50 8 940 50 10 1140 55 10 1142 52 7 845 55 7 845 55 10 1145 61 12 1350 56 8 950 60 6 750 60 7 850 60 10 1152 62 10 1155 65 7 855 65 10 11

55 70 10 1156 68 7 856 68 8.5 9.560 70 8.5 9.560 70 10 1160 72 8.5 9.560 74 8 960 75 12 1363 75 8.5 9.565 75 10 1165 77 8.5 9.568 74 4 568 80 8.5 9.569.8 84 11.2 12.270 80 12 1370 82 8.5 9.570 85 10 1175 85 12 1380 90 12 1380 92 8.5 9.580 92 9.5 10.585 95 7 885 95 12 1388 110 16.5 17.590 100 12 1390 102 8.5 9.591.8 106 11.2 12.295 105 12 13100 112 8.5 9.5100 115 10 11105 120 12 13110 125 10 11110 130 14 15113.8 128 11.2 12.2115 125 12 13120 135 9.5 10.5125 145 14 15135 145 12 13135.8 150 11.2 12.2140 160 14 15155 165 12 13160 170 12 13160 180 14 15161.8 176 11.2 12.2180 200 14 15185 195 12 13210 240 28 29215 225 12 13220 30 8 9240 250 12 13245 290 25 26

28

HPrS Ma25


sealing lips which are cut at an angle of less

than 45°.

Standard materialPolyurethane TPU92

area of applicationHydraulics





sealing lips. Its seal function is very effective due

to the sealing lips being provided with radial

self energising which is activated by the system

pressure. Due to the high wear resistance of

polyurethane, this seal has a particularly long

service life. For new design we recommend HRS

MA30 or HPS MA28.





VDMA 24317.



< +40 in HFa, HFB, HFC


installationThe HPRS MA25, from an inner diameter of


installed in cut housing. Due to the high tensile

and strength of polyurethane, it is necessary to

use installation tools for thick seals. With an inner

diameter of less than 25 mm, we recommend

axially accessible housing. To push the piston

body and seal into the cylinder pipe or over

the piston rod without damaging it, a lead-

in chamfer C acc. to the following table is

required:


4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10






between the cylinder head and piston rod or

cylinder pipe and piston acc. to the following

table:


5 0.6

10 0.5

20 0.35

30 0.3

The piston diameter d1 should generally be

by factor 1.0 of the profile smaller than the DN

diameter provided.


instructions.



other than the standard applications, other

polyurethane materials are available.

29


HPrS Ma25

Sizes metric

3 9 4.5 53 10 5 63 10 6 74 10 4 4.54 10 4.5 5.54 10 5 64 12 5.5 6.54 12 6 74 14 6 74.5 11 5 5.54.5 12.5 4.5 54.5 12.5 5 65 10 5 65 11 5 65 12 5 5.55 12 6.2 75 12 6 6.55 12 8 95 12.7 8 95 13 6 75 14 4.5 5.55 14 6 75 17 9 106 12 4 4.56 10 3 46 12 4.5 56 12 5 66 12 5.5 6.56 12 6 76 12 6.5 7.5

6 12 8 96 12.7 5.5 6.56 13 8 96 14 6 76 15 4 56 15 5 66 15 8 96 15 9 106 22 6 77 14 3.5 4.27 14 4 57 15 5 67 15 7 87 15 8 98 12 2.4 3.58 14 4 58 14 5 68 14 6 78 14 7 88 15 4 58 15 5.7 6.38 15 6 78 15 7 88 15 8 98 15 9 108 16 5.7 6.38 16 6 78 16 8 98 18 6 78 18 8 9

8 18 9 108 22 7 88 22 8 98 22 9 109 15 8 99 17 6 79 18 5 69 19 6 79 19 7 89 19 8 910 15 4 510 16 4 510 16 5 610 16 6 6.510 16 6.5 7.510 18 5 610 18 5.5 610 18 6 710 18 7 810 18 8 910 18 9 1010 20 5 610 20 6 710 20 7 810 20 8 910 20 9 1010 22 6 710 22 7 810 22 8 910 22 9 10

30


HPrS Ma25

Sizes metric

10 25 8 910 32 10 1111 17 4.4 511 20.5 6 711 20.5 7 811 22 8 911 26 8 912 18 4 512 18 4.8 5.512 18 5 612 18 6 712 18 7 812 20 5 612 20 7 812 20 8 912 20 9 1012 22 5 612 22 6 712 22 7 812 22 8 912 22 9 1012 24 6 712 24 8 912 24 9 1012 24 10 1112 25 8 912 25 9 1012 25 10 1112 27 7.5 8.512 28 8 913 20 4.5 5.513 25 8 913 25 10 1113 30 9 1014 20 4 514 20 4.8 5.314 20 5 614 20 6 714 22 3.9 4.514 22 4.5 514 22 5 614 22 6 714 22 7 814 22 8 914 22 9 1014 22 11 1214 24 6 714 24 8 914 24 9 1014 26 8 914 28 7 814 28 10 1115 20 3 415 22 4 515 22 7 815 25 5 615 25 6 715 25 8 915 25 9 1015 25 10 1115 27 6 715 27 7 815 28 8 915 28 10 1115 30 6 715 30 8 916 22 4 4.516 22 5 5.516 24 4 516 24 5 6

16 24 9 1016 24 10 1116 25 5 616 26 5 616 26 8 916 26 9 1016 26 10 1116 28 6 716 28 7 816 32 8 916 32 9 1016 35 9 1017 25 8 917 25 10 1117 32 7 817 32 10 1117 35 6 717 35 10 1118 25 5 5.518 25 6 718 26 5 618 26 6 718 26 6.5 7.518 26 8 918 26 8.5 9.518 28 8 918 28 10 1118 30 7.5 8.518 30 8 918 30 8.5 9.518 30 9 1018 30 10 1118 32 7 818 34 8 918 35 8 918 35 10 1118 36 8 918 40 11 1219 25 6 719 37 10 1120 25 3 420 26 4 520 26 5 620 27 5 620 27 6 720 28 4 520 28 5 620 28 6 720 28 8 920 28 9 1020 29 5 5.520 30 6 720 30 7.5 8.520 30 8 920 30 9 1020 30 10 1120 32 5 620 32 6 720 32 7.5 8.520 32 8 920 33 8 920 35 10 1120 35 12 1320 36 8 920 36 12 1320 37 12 1320 38 9 1020 39 10 1120 40 10 1120 40 11 12

20 40 12 1321 37 10 1121 37 12 1322 28 4 522 28 5.5 6.522 28 8 922 28 9 1022 30 4 522 30 5 622 30 6 722 30 7 7.522 30 10 1122 32 5 622 32 7 822 32 8 922 32 9 1022 32 10 1122 34 6 722 35 5 622 35 8 922 35 10 1122 36 8 922 40 10 1123 30 6.5 7.523 35 10 1124 32 7 7.524 32 8 924 34 10 1124 40 24 40 9 1025 30 8 925 32 4 525 32 10 1125 33 4 525 33 4.5 5.525 33 5 625 33 6 725 33 7 7.525 33 8 925 35 5 5.525 35 6 725 35 7 825 35 7.5 8.525 35 8 925 35 9 1025 35 10 1125 37 7 825 37 9 1025 38 9.5 10.525 38 10 1125 39 7 825 40 8 925 40 10 1125 45 10 1126 35 5 626 36 7 826 38 8 926 47 12 1327 35 4 527 36 6 727 38 6 728 35 5 5.528 35.5 5 628 36 4 528 36 5 628 36 6 728 36 6.5 7.528 38 7 828 38 8 928 38 9 10

31


HPrS Ma25

Sizes metric

28 38 10 1128 40 8 928 40 10 1128 43 10 1128 44 8 928 44 10 1128 46 10 1128 47 10 1128 48 12 1330 37 5.8 6.830 37 6 730 38 5 630 38 6 6.530 38 6.5 7.530 38 7 830 38 8 930 40 5 5.530 40 5.5 6.530 40 6 730 40 6.5 7.530 40 7 830 40 8 930 40 10 1130 42 6 730 42 9 1030 42 10 1130 43 6.5 7.530 45 9 1030 45 10 1130 46 10 1130 50 10 1130 50 12 1330 52 11 1231 38 7 832 40 4 532 40 5 632 40 5.5 6.532 40 6 732 40 7 832 40 8 932 40 10 1132 42 6 732 42 10 1132 45 10 1132 47 10 1132 50 10 1132 50 12 1332 52 10 1133 43 10 1133 46 10 1134 42 8 934 45 7 834 45 8 934 45 9 1034 46 8 934 50 14 1534 74 10 1135 42 8 935 43 6 735 43 7 835 43 8 935 45 6 735 45 7.5 8.535 45 8 935 45 9 1035 45 10 1135 47 10 1135 48 10 1135 50 7 835 50 8 9

35 50 9 1035 50 10 1135 55 10 1135 55 12 1335.5 45 6 736 44 4 536 44 5.7 6.536 45 10 1136 46 7 836 46 8 936 46 10 1136 48 8 936 50 8 936 51 10 1136 52 10 1136 55 10 1136 70 10 1138 40 8 938 45 5 5.538 45 6 738 45 8 938 45 10 1138 46 6 738 46 6.5 7.538 50 6 738 50 9 1038 50 10 1138 52.5 9.5 10.538 55 10 1138 55 12 1338 58 10 1138 60 12 1340 48 5 640 48 8 940 48 11 1240 50 5 640 50 6 740 50 6.5 7.540 50 7 840 50 7.5 8.540 50 8 940 50 10 1140 52 8 940 52 9 1040 55 10 1140 56 8 940 56 10 1140 60 10 1140 60 12 1340 60 13 1440 60 18 1940 64 12 1340 65 10 1140 65 12 1340 65 13 1440 70 15 1640 75 10 1140 80 10 1142 50 5 642 50 8 942 50 9 1042 50 10 1142 52 6 742 52 9 1042 52 10 1142 62 12 1344 54 6 744 64 10 1145 53 5.7 6.545 53 6.5 7.5

45 53 8 945 53 10 1145 53 12 1345 55 5 645 55 6 745 55 6.5 7.545 55 7 845 55 10 1145 55 11 1245 55 12 1345 56 7 845 57 6 745 58 12 1345 60 9 1045 60 10 1145 63 9 1045 63 10 1145 63 12 1345 65 10 1145 65 12 1345 65 18 1945 70 10 1145 70 12 1345 75 15 1646 70 12 1347 57 10.2 1147 62 12 1347 65 12 1348 58 10 1148 60 9 1048 63 10 48 63 12 1348 65 10 1148 68 10 1150 57 10 1150 58 8 950 60 5 650 60 6 750 60 7.2 850 60 8 950 60 9 1050 60 10 1150 60 11 1250 60 12 1350 60 13 1450 62 9 1050 62 10 1150 63 6 750 63 7 850 63 8 950 63 9 1050 63 10 1150 65 8 950 65 9 1050 65 10 1150 65 12 1350 70 8 950 70 10 1150 70 12 1350 70 18 1950 72 12 1350 74 15 1650 75 12 1350 75 15 1650 76 12 1350 80 10 1150 80 18 1952 62 12 1352 68 8 952 80 15 16

32


HPrS Ma25

Sizes metric

53 63 5 653 63 6 753 63 6.5 7.554 72 10 1155 65 5 655 65 6 755 65 10 1155 65 12 1355 70 7.5 8.555 70 9 1055 70 10 1155 70 12 1355 75 10 1155 75 12 1355 75 18 1955 76 10 1155 80 10 1155 80 12 1355 80 15 1655 80 18 1956 66 6.7 7.556 70 12 1356 71 10 1156 76 12 1356 80 15 1660 68 8 960 68 10 1160 68 12 1360 68 12.5 13.560 70 5 660 70 6 760 70 7.5 8.560 70 8 960 70 10 1160 70 12 1360 70 13 1460 75 8 960 75 9 1060 75 10 1160 75 12 1360 80 10 1160 80 12 1360 80 13.5 14.560 80 18 1960 85 10 1160 85 12 1360 85 12.5 13.560 90 15 1661 80 12 1362 72 12.5 13.562 75 10 1163 73 5 663 75 10 1163 75 12 1363 78 10 1163 80 9 1063 80 10 1163 83 12 1363 83 13 1463 83 15 1664 76 9 1064 80 8 965 73 12 1365 75 6 765 75 10 1165 75 12 1365 80 9 1065 80 10 1165 80 11 1265 80 12 13

65 82 12 1365 85 10 1165 85 12 1365 85 18 1965 86 12 1365 90 8 965 90 12 1365 90 13 1465 90 15 1665 90 18 1965 95 12 1365 106 25 2666 76 8 966 80 10 1166 80 13 1467 77 10 1167 77 12 67 80 12 1368 92 15 1670 80 5 670 80 6 770 80 7 870 80 8 970 80 10 1170 80 12 1370 81 15 1670 82 10 1170 85 8 970 85 9 1070 85 10 1170 85 12 1370 90 10 1170 90 12 1370 90 13.5 14.570 90 18 1970 95 10 1170 95 12 1370 100 15 1670 105 15 1672 90 10 1172 90 11 1272 90 12 1372 96 12 1375 85 6 775 85 10 1175 85 12 1375 87 9 1075 90 7.5 8.575 90 9 1075 90 10 1175 90 12 1375 90 15 1675 95 10 1175 95 12 1375 95 13.5 14.575 100 12 1375 100 15 1675 100 22 2375 105 15 1678 86 12.5 13.578 93 10.5 11.578 100 15 1680 90 5 680 90 5.4 6.580 90 6 780 90 8 980 90 10 1180 90 12 1380 90 13.5 14.580 92 9 10

80 92 11.5 12.580 95 7.5 8.580 95 8 980 95 9 1080 95 10 1180 95 12 1380 100 10 1180 100 12 1380 100 13.5 14.580 100 18 1980 105 12 1380 105 22 2382 92 10 1183 103 14 1584 100 8 984.5 94 8 8.885 95 8.5 9.585 95 9 1085 95 12 1385 100 8 985 100 9 1085 100 11 1285 100 12 1385 100 25 2685 105 10 1185 105 12 1385 105 15 1685 105 18 1985 110 12 1385 115 15 1686 106 10 1187 102 13 1488 96 8 988 108 12 1389 100 12 1390 98 12 1390 100 5 690 100 6 790 100 7 890 100 8 990 100 10.5 11.590 100 12 1390 100 15 1690 102 9 1090 105 9 1090 105 12 1390 110 8 990 110 8.4 9.590 110 10 1190 110 12 1390 110 15 1690 110 18 1990 115 12 1390 115 15 1690 115 22 2390 120 15 1694 124 15 1695 105 11 1295 105 12 1395 110 9 1095 110 10 1195 110 12 1395 110 15 1695 112 11 1295 115 12 1395 115 15 1495 115 18 1995 120 12 1395 125 12 13100 110 5 6

33


HPrS Ma25

Sizes metric

100 110 8 9100 115 9 10100 115 12 13100 115 14 15100 120 10 11100 120 12 13100 120 13.5 14.5100 120 15 16100 120 18 19100 125 10 11100 125 12 13100 125 15 16100 130 12 13100 130 15 16100 130 18 19105 120 8 9105 120 15 16105 125 10 11105 125 12 13105 125 14 15105 125 15 16105 125 16 17105 135 18 19106 120 8.5 9.5107 130 15 16108 116 11.5 12.5110 125 12 13110 125 15 16110 130 12 13110 130 15 16110 130 18 19110 135 18 19110 140 18 19110 150 20 21112 132 12 13113 125 9.5 10.5114 124 10 11115 125 8 9115 125 15 16115 126 15 16115 129 13 14115 130 15 16115 135 12 13115 135 15 16115 140 15 16115 140 18 19115 140 22 23115 155 20 21120 130 5 6120 130 14 15120 135 15 16120 140 10 11120 140 10.5 11.5120 140 12 13120 140 15 16120 145 18 19120 150 15 16125 135 10 11125 140 11 12125 140 12 13125 140 15 16125 145 12 13125 145 15 16125 145 18 19125 147 12 13125 150 12 13125 150 18 19125 155 15 16125 155 18 19125 165 20 21

127 142 12 13130 145 15 16130 150 10 11130 150 12 13130 150 15 16130 157 15 16130 160 15 16130 160 18 19132 144 12 13133 149 11 12135 150 15 16135 155 15 16135 160 15 16135 165 15 16140 150 5 6140 155 15 16140 160 6 7140 160 12 13140 160 15 16140 165 15 16140 165 18 19140 170 17 18140 170 18 19145 160 8 9145 160 9 10145 165 15 16145 170 18 19146 170 14 15148 160 9.5 10.5150 160 12 13150 160 13.5 14.5150 170 15 16150 170 18 19150 180 13.5 14.5150 180 15 16150 180 18 19153 165 12 13154 169 11 12155 175 15 16155 180 15 16157 170 12 13160 175 7.5 8.5160 180 15 16160 185 15 16160 190 15 16160 190 22 23165 190 15 16165 215 20 21170 190 15 16170 195 15 16170 200 15 16170 200 18 19170 202 26 27170 212 20 21170 215 20 21175 187 12 13175 200 15 16175 215 20 21180 200 15 16180 200 18 19180 205 15 16180 210 15 16180 210 22 23180 220 16 17180 220 20 21185 200 7.5 8.5185 200 9 10185 205 15 16190 204 15 16190 210 15 16

190 215 15 16190 220 15 16190 220 25 26190 220 26 27200 220 10 11200 220 15 16200 225 18 19200 230 17 18200 230 18 19200 230 22 23200 235 20 21200 238 22 23200 240 20 21205 225 12 13205 235 18 19210 235 18 19210 240 18 19210 250 20 21212 237 18 19220 240 15 16220 250 15 16220 250 18 19220 250 20 21220 255 22 23220 255 30 31220 265 22 23224 249 18 19225 245 15 16225 250 18 19225 255 42 43225 265 34 35229 263 20 21230 250 12 13230 250 15 16230 255 18 19230 260 18 19235 255 12 13236 261 18 19240 260 16 17240 260 17 18240 260 18 19240 265 18 19245 270 15 16250 280 22 23255 280 18 19260 290 18 19260 296 34 35260 300 20 21260 300 26 27265 290 17 18265 295 18 19270 290 17 18270 300 15 16270 310 20 21280 300 15 16280 310 18 19280 310 21 22296 325 14 15300 330 18 19305 320 17 18310 330 17 18320 350 15 16320 350 16 17320 360 20 21330 360 22 23355 375 22 23360 390 22 23500 540 34 35530 565 25 26

34

HPS Ma28

piston seal with asymmetrical sealing lips which

are cut at an angle of less than 45°.




extreme loads

FunctionThe HPS MA28 is a single function piston seal in

the form of a U-ring. Its excellent suitability for

extreme loads, which is for example required

for application in the working cylinders of

heavy earth-moving machines, is provided

by the synergy between the geometric of this

seal and the special material characteristics of

polyurethane. It guarantees effective sealing

at low and zero pressures as well as the most

difficult operational conditions which would

overload.





VDMA 24317.



< +40 in HFA, HFB, HFC


installationThe HPS MA28, with a thin profile can always be

installed in cut housing. Due to the high strength

of polyurethane, it is necessary to use intallation

tools for thick seals. To push the piston body and

seal into the cylinder pipe without damaging it,

a lead-in chamfer C acc. to the following table

is required:


4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10









5 0.6

10 0.5

20 0.35

30 0.3

40 0.25

The piston diameter d1 should generally be

by factor 1.0 of the profile smaller than the DN

diameter provided.


instructions.





35


HPS Ma28

Sizes metric

11 6 7 812 5 5.5 612 6 4 514 6 8 914 8 4.5 5.514 8 6.3 6.815 9 8 916 6 8 916 6 10 1116 8 5.7 6.316 10 4 516 10 6 6.516 10 6.5 7.516 10 8 918 8 7.5 8.518 10 6 720 10 6 720 10 7.5 8.520 10 8 920 12 5 620 12 5.5 6.320 12 6.5 7.520 12 7 820 12 7.5 8.520 14 5.5 622 12 8 922 14 5 623.5 15 8 924 16 5.7 6.325 10 10 1125 13 7 825 15 7.3 825 15 8 925 17 5.5 6.325 17 10 1125 18 5 5.626 16 7.5 8.526 18 5 626 18 7 826 20 6 728 15 10 1128 20 5 6

30 15 10 1130 17 10 1130 20 5 630 20 6 730 20 7 830 20 8 930 22 6.5 730 22 10 1132 17 10 1132 22 7.3 832 22 8 932 22 10 1132 24 5.5 6.332 24 5.7 6.732 25 5 5.632 26 5 634 22 8.4 9.434 22 9 1035 18 12 1335 20 10 1135 22 10 1135 25 6 735 25 6.5 7.535 25 7 835 25 7.3 8.335 25 8 935 27 5 635 27 10 1135.4 22.4 10 1135.5 22.5 8 935.5 22.5 10 1135.5 25.5 6 735.5 25.5 8 935.5 27.5 5 636 28 7 836.5 24 6.2 737 21 12 1338 22 10 1138 25 10 1138 30 6.5 7.538 31 4.7 5.240 20 12 13

40 25 9 1040 25 10 1140 27 8 940 27 10 1140 28 10 1140 30 6.5 7.540 30 7 840 30 10 1140 32 5.7 6.340 32 8 940 33 8 942 22 10 1142 30 10 1142 32 10 1142 34.5 4.2 4.743 25 9 1043 30 10 1143 33 7.3 843 35 9 1044 20 11 1244 36 7 845 25 12 1345 28.5 12 1345 30 9 1045 30 10 1145 32 8 945 32 10 1145 33 9 1045 35 6 745 35 8 945 38 6 748 28 12 1348 35 10 1148 38 8 950 30 12 1350 32 10 1150 34 10 1150 34 12 1350 35 8.5 9.550 35 10 1150 35 12 1350 40 5 5.5

36


HPS Ma28

Sizes metric

50 40 6 750 40 7 850 40 8 950 40 10 1150 42 5.5 650 42 8 950 42 10 1150.8 40.8 7 852 42 10 10.654 44 7.3 855 35 12 1355 40 10 1155 45 6 755 45 7 855 45 8 955 45 10 1155 47 5.7 6.356 40 10 1156 40 12 1356 41 9 1056 41 10 1156 45 7 856 46 6 757 41 11.4 12.560 40 12 1360 40 13.5 14.560 45 9 1060 45 10 1160 50 5 5.560 50 6 760 50 7 860 50 8 960 50 10 1160 52 8 961 45 12 1363 43 12 1363 45 10 1163 45 12 1363 47 12 1363 48 9 9.563 48 10 1163 48 11.4 12.563 48 12 1363 53 6 763 53 7 863 53 12 1363 55 5.7 6.365 45 12 1365 45 13.5 14.565 50 9 1065 50 10 1165 50 11.5 12.565 55 7.3 865 55 8 965 55 10 1165 55 13.5 14.566 50 12 1367 57 7.3 868 48 10 1168 52 8 968 58 9.5 10.568 60 8 970 50 12 1370 50 13.5 14.570 50 15 1670 55 9 1070 55 9.5 10.570 55 10 1170 55 12 1370 58 8.5 9.5

70 60 6 770 60 7 870 60 8 970 60 12 1370 60 13.5 14.570 62 7.5 8.571 51 12 1371 55 10 1171 55 12 1371 56 9 1071 56 10 1171 60 7 871 61 6 771 61 8 972 58 12 1373 63 6 775 50 14 1575 55 12 1375 55 13.5 14.575 60 9 1075 60 10 1175 60 12 1375 63 8.7 9.575 65 5 5.575 65 6.7 7.575 65 7 875 65 8 975 65 10 1175 65 13.5 14.576 60 12 1377 67 6 780 60 12 1380 60 13.5 14.580 60 14.5 1680 64 12 1380 65 8.6 9.580 65 11.4 12.580 65 12 1380 68 8.5 9.580 70 6.7 7.580 70 7 880 70 8 980 70 12 1380 71 6 780 72 12 1382 65 12 1385 65 12 1385 65 13.5 14.585 70 9 1085 70 10 1185 70 12 1385 75 6 785 75 8 985 75 10 1185 75 12 1390 65 12 1390 70 12 1390 70 13.5 14.590 70 15 1690 75 9 1090 75 11.4 12.590 75 12 1390 80 5 5.590 80 6 790 80 8 990 80 9.5 10.590 80 10 1190 80 13 1490 80 13.5 14.595 75 12 13

95 75 13.5 14.595 75 15 1695 80 9 1095 80 10 1195 80 12 1395 85 6.7 7.595 85 7 895 85 8.5 9.595 85 13.5 14.5100 80 10 11100 80 12 13100 80 13.5 14.5100 80 15 16100 85 9 10100 85 11.4 12.5100 85 12 13100 86 12 13100 88 10 11100 90 7 8100 90 8.5 9.5100 90 10.5 11.5101.6 80 12 13105 85 15 16105 90 9 10105 90 12 13105 95 12 13110 85 15 16110 90 12 13110 90 15 16110 95 9 10110 95 10 11110 95 12 13110 100 7 8110 100 13.5 14.5112 92 12 13112 92 15 16112 97 9 10112 97 10 11112 98 8.5 9.5115 90 15 16115 95 15 16115 100 6 7115 100 9 10115 100 10.5 11.5115 105 13.5 14.5120 95 12 13120 95 15 16120 100 12 13120 100 13.5 14.5120 100 15 16120 103 16 17120 105 9 10120 105 10 11120 105 12 13120 106 8.5 9.5124 103 16.5 17.5125 95 18 19125 100 15 16125 105 12 13125 105 15 16125 105 16 17125 110 9.6 10.6125 110 10 11125 112 9 10125 115 7 8125 115 15 16130 110 12 13130 110 15 16130 110 16 17130 115 9 10

37


HPS Ma28

Sizes metric

130 115 10 11130 120 13.5 14.5132 112 15 16137 87 25 26140 114 12 13140 115 15 16140 120 12 13140 120 15 16140 120 16 17140 125 9 10140 125 10 11140 125 15 16142 130 12 13145 115 18 18.6145 130 10 11150 120 18 19150 125 13.5 14.5150 125 19 20150 125 20 21150 130 12 13150 130 15 16150 130 16 17150 135 9 10150 135 10 11150 136 8.5 9.5150 140 7 8155 140 9 10155 143 12 13157 132 20 21160 130 18 19160 135 18.5 20160 135 20 21160 140 12 13160 140 13.5 14.5160 140 14 15160 140 15 16160 140 16 17160 145 9 10160 145 10 11160 145 14 15160 148 7.1 7.5160 148 15.5 16.5165 140 19 20165 140 20 21170 145 19 20

170 145 20 21170 150 12 13170 150 15 16170 150 16 17170 155 9 10170 155 10 11175 155 14 15175 160 9 10180 150 18 19180 155 16 17180 155 19 20180 155 20 21180 160 12 13180 160 13.5 14.5180 160 15 16180 165 9 10180 165 10 11180 166 15.5 16.5185 160 19 20185 160 20 21190 165 16 17190 165 20 21190 170 12 13190 170 15 16190 170 16 17190 175 9 10200 170 18 19200 170 22.7 25200 175 16 17200 175 19 20200 175 20 21200 180 12 13200 180 15 16200 185 9.6 10.6205 180 19 20205 180 20 21210 185 16 17210 185 20 21210 190 12 13210 190 16 17220 190 18 19220 195 16 17220 195 20 21220 200 12 13220 200 15 16

220 200 16 17224 199 16 17224 199 20 21224 204 12 13224 204 16 17225 200 16 17225 200 19 20225 200 20 21225 205 12 13225 205 16 17225 213 15 16230 205 16 17230 205 19 20230 205 20 21230 210 12 13230 210 16 17240 215 16 17240 215 19 20240 215 20 21240 220 12 13240 220 16 17250 220 18 19250 225 16 17250 225 19 20250 225 20 21250 230 12 13250 230 15 16250 230 16 17250 238 14 15280 250 18 19300 288 14 15310 280 22 23320 280 28 29320 285 20 21320 290 20 21320 295 18 19360 320 28 29360 330 15 16360 330 20 21400 360 28 29400 370 20 21

38

HrS Ma30

piston rod seal with asymmetrical sealing lips

which are cut at an angle of less than 45°.




extreme loads

FunctionThe HRS MA30 is a single function piston seal in

the form of a U-ring. Its excellent suitability for

extreme loads, which is for example required

for application in the working cylinders of

heavy earth-moving machines, is provided

by the synergy between the geometric of this

seal and the special material characteristics of

polyurethane. It guarantees effective sealing

at low and zero pressures as well as the most

difficult operational conditions which would

overload conventional elastomer or fabric

U-rings.





VDMA 24317.



< +40 in HFA; HFB; HFC


installationThe HRS MA30, from an inner diameter of 25

mm and a thin profile, can always be installed

in cut housing. Due to the high strength of

polyurethane, it is necessary to use installation

tools for thick seals. With an inner diameter


accessible housing. To push the cylinder head

and seal over the piston rod without damaging

it, a lead-in chamfer C acc. to the following

table is required:


4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10









5 0.6

10 0.5

20 0.35

30 0.3

40 0.25


instructions.





39


HrS Ma30

Sizes metric

6 10 3 3.56 12 4.5 5.26 12 5.5 5.86 13 5 5.66 14 5.7 6.38 14 4.5 5.28 14.4 9.5 10.58 16 5.7 6.38 16 6 78 16 8 98 18 8 98 20 8 99 16 5.7 6.310 16 4.5 5.210 17 5.7 6.310 18 5.7 6.310 18 6 710 20 7.2 810 20 8 912 18 5 5.512 19 5 5.612 20 5.7 6.312 20 6 712 22 7.2 812 22 8 914 21 5 5.614 22 5.7 6.314 22 6 714 24 7.2 814 24 8 915 23 5.7 6.315 23 10 1115 25 8 915 26 7.2 815 27 12 1316 20.6 3.3 3.616 22 5 5.516 22 10 1116 24 5.7 6.316 24 6.2 716 26 7.2 816 26 8 9

16 26 9 1018 24 4.7 5.218 25 5 5.618 26 5.7 6.318 26 6 718 26 8 918 28 7.2 818 28 8 920 26 3.5 3.920 26 5 5.620 27 6 720 28 4 520 28 5.7 6.320 28 6.2 720 28 7.2 820 30 6 720 30 7.2 820 30 8 920 30 10 1120 32 7.5 8.520 35 10 1120 40 20 2122 29 5 5.622 30 5.7 6.322 30 7 822 30 8 922 32 6 722 32 7.2 822 32 8 922 32 10 1123 40 18 1924 34 7.2 824 34 8.5 9.525 32 6 725 33 5.7 6.325 33 6.2 725 33 6.5 7.325 33 7.2 825 33 8 925 33 10 1125 35 6 725 35 7.2 8

25 35 7.5 8.525 35 8 925 35 10 1125 37 6 725 38 9 1025 40 10 1125 40 11 1228 36 5.7 6.328 36 6 728 36 8 928 38 6 728 38 7.2 828 38 8 928 38 10 1128 39 8 928 40 8.5 9.528 40 10 1128 43 11.5 12.528 48 18 1929 35 5.7 6.330 38 5.7 6.330 38 6.3 730 38 8 930 40 5.7 6.330 40 6 730 40 7 830 40 7.2 8.230 40 8 930 40 9.5 10.530 40 10 1130 40 10.3 11.330 43 9 1030 45 8 930 45 10 1132 40 5.7 6.332 40 6.7 7.532 40 8 932 42 7 832 42 7.2 832 42 7.5 8.532 42 8 932 42 10 11

40


HrS Ma30

Sizes metric

32 42.53 8 932 45 9.5 10.532 45 10 1132 47 10 1133 43 10 1135 43 5.7 6.335 43 8 935 45 6 735 45 7.2 835 45 8 935 45 10 1135 45 12.5 13.535 46 8 935 46 9 1035 50 8 935 50 10 1135 55 12 1336 44 5.7 6.336 44 8 936 46 7.2 836 46 8 936 46 10 1136 48 7.2 836 48 8 936 51 10 1136 51 11.5 12.536 56 12 1337 45 5.7 6.337 47 10 1138 44.5 4.7 5.338 45 5 5.538 45 6 738 45 6.2 738 50 10 1140 48 5.7 6.340 48 8 940 48 11 1240 49.52 9.5 10.540 50 7.2 840 50 8 940 50 10 1140 50 12.5 13.540 52 8 940 55 7.2 840 55 10 1140 55 11.5 12.540 60 12 1342 50 5.7 6.342 50 6.5 7.542 52 10 1142 62 10 1142 62 12 1345 53 5.7 6.345 53 8 945 53 10 1145 53 12 1345 55 5.7 6.345 55 7.2 845 55 7.5 8.545 55 10 1145 57 9 1045 57.7 9.5 10.545 58 9 1045 60 10 1145 60 11.5 12.545 65 10 1145 65 12 1345 65 13.5 14.546 56 7.2 850 58 8 9

50 60 6 750 60 7.2 850 60 7.5 8.550 60 10 1150 60 12 1350 62 8 950 62.7 9.5 10.550 65 10 1150 65 11.5 12.550 68 9 1050 70 10 1150 70 12 1350 70 13.5 14.550 70 14 15.552 62 10 1155 63 7 855 63 8 955 63 12 1355 65 7.2 855 65 10 1155 65 12 1355 65 13.5 14.555 67 10 1155 70 10 1155 70 12 1355 75 12 1355 75 13.5 14.556 66 6.5 7.556 66 7 856 66 8 956 66 10 1156 68 9.5 10.556 71 8.6 9.556 71 10 1156 71 11.5 12.556 71 12 1356 76 12 1356 76 13.5 14.556 76 15 1660 68 8 960 70 7.2 860 70 10 1160 70 12 1360 70 13.5 14.560 72 8 960 72 9 1060 72 9.5 10.560 75 10 1160 75 11.5 12.560 75 12 1360 77 11 1260 80 12 1360 80 13.5 14.561 69 7.5 8.562 74 13 1462.5 75.1 7.5 8.563 73 6.5 7.563 73 10 1163 73 12 1363 75 8.7 9.663 75 9.5 10.563 75 10 1163 78 10 1163 78 11.5 12.563 78 12 1363 83 12 1363 83 13.5 14.563 83 15 1665 75 10 1165 75 12 13

65 75 13.5 14.565 77 8.6 9.665 77 9 1065 78 10 1165 80 10 1165 80 12 1365 85 12 1365 85 13.5 14.569.85 85 13 1470 78 8 970 78 12 1370 80 6 6.570 80 6.5 7.570 80 7.2 870 80 10 1170 80 12 1370 82 9 9.670 83 10 1170 85 10 1170 85 11.5 12.570 85 12 1370 90 12 1370 90 13.5 14.570 90 15 1672 80 12 1373 82.5 7.2 873 94 15 1675 85 7.2 875 85 12 1375 85 13.5 14.575 87 8.6 9.675 90 10 1175 90 12 1375 95 12 1375 95 13.5 14.576 84 7.5 8.580 90 7.2 880 90 10.5 1180 90 12 1380 90 14 1580 92 8.6 9.680 92 10 1180 93 10 1180 95 10 1180 95 11.5 12.580 95 12 1380 100 12 1380 100 13.5 14.580 100 15 1682.55 98.5 13 1485 94 14 1585 95 7.2 885 95 12 1385 97 8.6 9.685 100 11 1285 100 11.5 12.585 100 12 1385 105 12 1385 105 13.5 14.590 100 6.5 7.590 100 10 1190 100 11.5 12.590 100 12 1390 102 9 1090 102 10 1190 105 8.5 9.590 105 9.5 10.590 105 10 1190 105 11.5 12.590 105 12 13

41


HrS Ma30

Sizes metric

90 110 12 1390 110 15 1691 99 7.5 8.592 105 9.5 10.693 104 10 1195 103 12 1395 105 10 1195 105 12 1395 110 9 1095 110 12 1395 115 12 13100 108 12 13100 110 14 15100 112 16 17100 113 12.5 13.5100 115 9 10100 115 10 11100 115 10.5 11.5100 115 11 12100 115 12 13100 120 11.5 12.5100 120 12 13100 120 13.5 14.5100 120 15 16100 125 19 20105 115 10 11105 115 11.5 12.5105 115 13.5 14.5105 120 9.5 10.2105 120 9.9 10.5105 120 12 13105 120 15 16105 125 12 13105 125 14.5 16110 115 10 11110 120 12 13110 125 9.6 10.6110 125 11 12110 125 12 13110 125 15 16110 130 12 13110 130 15 16110 135 19 20115 125 12 13115 135 12 13115 135 15 16

120 130 7.2 8120 130 11.5 12.5120 130 13.5 14.5120 132 10 11120 135 11.5 12.5120 135 15 16120 140 12 13120 140 14.6 15.5120 140 15 16125 135 13.5 14.5125 140 11 12125 145 12 13125 145 15 16125 150 14 15125 150 19 20125 155 18 19127 139.7 9.2 10130 140 7.2 8130 140 13.5 14.5130 145 12 13130 145 14 15130 145 15 16130 150 12 13130 150 15 16135 145 12 13140 150 11.5 12.5140 150 11.8 12.8140 155 9.6 10.6140 155 12 13140 160 12 13140 160 15 16140 165 19 20142 155 12 13145 155 13.5 14.5145 157.7 9 10145 165 14.5 16145 185 13.5 14.5147 160 12 13150 160 13.5 14.5150 170 12 13150 170 13.5 14.5150 170 15 16155 165 12 13160 169 13.5 14.5160 170 12 13160 180 12 13

160 180 15 16160 185 15 16160 185 19 20160 190 18 19165 195 20 21170 180 14.5 15.5170 190 12 13170 190 15 16170 200 18 19175 195 16 17180 200 12 13180 200 15 16180 200 19 20180 205 15 16185 195 12 13190 210 12 13190 210 15 16198 207.6 6.5 7.5200 212 15 16200 220 12 13200 220 15 16200 225 15 16200 225 19 20200 240 18 19210 230 12 13210 230 15 16210 235 24.5 26215 225 12 13220 240 12 13220 240 15 16220 250 18 19230 250 12 13230 260 23.6 25235 255 12 13240 250 12 13240 260 12 13240 260 15 16240 270 18 19250 270 12 13250 270 15 16250 280 22 23270 300 18 19280 300 15 16280 305 15 16280 310 24 25320 340 15 16

42

HrS Ma35

piston rod seal with symmetrical seal lips which

are cut at an angle of less than 45°. There is a

second seal lip on the inner diameter.




FunctionThe HRS MA35 is a single function piston rod

seal in the form of a compact U-ring. Its design

and the excellent material characteristics of

polyurethane guarantee effective sealing at

low and zero pressures as well as high pressure

loads and a particularly long service life. Due

to the second seal lip which provides even

greater effectivity of the sealing function, it is

particularly well-suited for positioning work in

hydraulics.





VDMA 24317


Temperature (°C): –40 to +100


Running speed (m/s):

43


HrS Ma35

Sizes metric

6 14 5.8 6.36.35 14.3 6 78 14 5 68 14 5.8 6.38 15 5.8 6.38 16 5.8 6.310 16 4.8 5.410 18 5.8 6.312 19 5 612 19 5.8 6.312 20 5.8 6.312 23 6.5 7.514 20 4.8 5.314 21 5 614 22 5.8 6.315 21.5 4.2 515 23 6 715.4 25.5 6.5 7.516 24 5.8 6.316 24 6 718 25 5 618 26 5.8 6.318 26 6 718 26 8 918 28 5.8 6.319.5 27.5 8 920 26 5.2 620 28 5.8 6.320 30 4.5 520 30 7 822 28 4.5 522 28 5.8 6.322 29 5 622 30 5.8 6.322 30 6 725 33 5.8 6.325 33 6.5 7.525 33 7 825 35 5.8 6.325 35 7 825 35 8 9

28 34.2 5.2 628 36 5.8 6.328 36 6 728 38 5.8 6.328 38 7 830 38 5.8 6.330 38 6 730 38 7 830 38 8 930 40 6.5 7.530 40 10 1132 40 5.8 6.332 40 6 732 40 6.7 7.732 40 8 932 41.5 7.8 8.932 42 5.8 6.332 42 7 832 42.5 8 932 47 10 1135 43 5.8 6.335 43 6 735 43 8 935 45 10 1135 45 12.5 13.535 50 10 1136 44 5.8 6.336 44 6 736 44 8 937 47 7 838 50 8.5 9.540 48 5.4 6.440 48 5.8 6.340 48 6 740 48 6.3 740 48 8 940 49.5 9.5 10.540 50 7 840 50 10 1140 55 10 1140 60 10 11

42 50 6 742 52 8 945 53 5.8 6.345 53 8 945 55 5.8 6.345 55 7 845 55 7.5 8.545 55 10 1145 57.7 9.5 10.546 54 8 948 58 10 1148 60 6 749.5 65.3 10 1150 58 8 950 60 7 850 60 7.5 8.550 60 9 1050 60 10 1150 60 12 1350 62.7 9.5 10.550 65 10 1150 70 13.5 14.555 63 8 955 65 7 855 65 7.5 8.555 65 10 1155 65 12 1356 64 8 956 66 6.5 7.556 71 11.5 12.560 68 6.3 760 68 8 960 68 11.5 12.560 70 7 860 70 7.5 8.560 70 11.5 12.560 71 8 960 72 9 1060 75 10 1161 69 8 963 71 8 9

44


HrS Ma35

Sizes metric

65 73 8 965 75 12.5 13.565 77 9 1065 77.7 9.5 10.565 79.2 11.5 12.570 78 8 970 80 6.5 7.570 80 11.5 12.570 80 12 1370 85 11.5 12.573 82.4 7 875 83 8 975 85 7 875 85 12 1375 90 10.5 11.576 84 8 976.2 91.2 12 1378 86 8 980 88 8 980 88 11.5 12.580 90 12 1380 92 9 980 95 11 1280 95 11.5 12.580 96 9.5 10.582.5 97.5 12 1385 93 8 9

85 93 11.5 12.585 95 12 1386 101 12 1388 96 8 990 98 8 990 100 6.5 7.590 102 9 1090 105 11.5 12.590 110 14 1591 99 8 995 103 8 9100 108 11.5 12.5100 110 12 13100 115 11.5 12.5100 115 12 13100 120 15 16102 110 8 9105 113 8 9105 115 10.5 11.5107 115 8 9108 116 8 9110 125 9.5 10.5110 125 11.3 12110 130 15 16112 127 12 13115 123 8 9115 130 11.5 12.5

120 128 11.5 12.5120 135 15 16125 133 8 9125 145 15 16126 134 8 9130 145 15 16130 155 15 16135 143 8 9135 150 11.5 12.5137 152 12 13140 150 11.5 12.5140 155 9.5 10.5140 160 15 16146 156 10 11150 180 15 16160 175 15 16163 178 12 13165.5 173 9 10170 180 10 11188 203 12 13190 210 13.5 14.5197 209 12 13218 237 16 17220 250 19.5 20.5228 240 12 13300 325 24 25

45

HPrS Ma36

piston and piston rod seal with symmetrical seal

lips which are cut at an angle of less than 45°.




FunctionThe HPRS MA36 is a single function piston rod

seal in the form of a compact U-ring which, due

to its symmetrical seal lips, can be applied as a

piston and piston rod seal. Its sealing function

is very effective as the seal lips are provided

with radial self-energising which is activated

by the system pressure. Its compact design

and the excellent material characteristics of

polyurethane guarantee effective sealing on

the one hand at low as well as high pressure

loads and, on the other, a particularly long

service life.





VDMA 24317


Temperature (°C): –40 to +100


Running speed (m/s): < 0.5

installationThe HPRS MA36, from an inner diameter of

25 mm and a thin profile, can always be

installed in cut housing. Due to the high tensile

resistance of polyurethane, it is necessary to

use installation tools for thick seals. With an inner

diameter of less than 25 mm, we recommend

axially accessible housing. To push the cylinder

head and seal over the piston rod or push the

piston rod with the seal into the cylinder rod

without damaging the seal, an lead-in chamfer

C acc. to the following table is required:


4 2

5 2.5

7.5 4

10 5

12.5 6.5

15 7.5

20 10

25 10

The service life of the seal is lengthened if the

housing is provided with a metallic fitting on the

side opposite the pressure. Within the operating

parameters given above, depending on the

pressure, a metallic wedge can be

hydraulic seals · u-rings are among the most important seals used in hydraulics and pneumatics....

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