fluidpowersealcatalogue - công ty tnhh kỹ thuật cự...
TRANSCRIPT
ACultureofExcellence...Making world class products for highly specified mission critical applications goesbeyond excellence in engineering and design; it involves a total commitment toquality in every aspect of our business.
Through product and service innovation in response to changing customer needsHallite’s sealing products have set new benchmarks across a wide variety ofindustries, in just about every corner of the globe.
Hallite has been at the cutting edge of sealing technology solutions for over onehundred years and has built up an unrivalled wealth of knowledge and expertise overthis period. Our stability and solid foundations have helped us support ourcustomers and offer them the reliability they have now come to expect.
www.hallite.com
All our activities conform to the highest qualityassurance systems. Hallite Seals Internationalis accredited to ISO 9001 and are approved bymany of the worlds foremost O.E.M.s
Within the introductory section (pages 2 – 21) technical data is provided to ease seal selection. Seal designs aregrouped according to their prime use in a hydraulic cylinder:
• Rod Seals
• Single Acting Rod and Piston Seals
• Double Acting Piston Seals
• Single Acting Piston Seals
• Unitised Piston
• Vee Packs
• Wipers
• Bearings
• Swivel Seals
• Additional Products
Product types are then listed in numerical order from page 25 and within each product type, parts are listed in sizeorder.
Parts suitable for ISO standard housings and Asian housings are clearly identified within each product group sizelists.
A product index by function and size is included in the yellow pages section.
We are constantly adding to our range of profiles and sizes. If you cannot locate the correct profiles or size, pleasecontact your nearest Hallite sales office or Hallite distributor.
The information contained within this catalogue is based on many years of fluid sealing experience, along withextensive in-house testing and is given in good faith. No warranty or guarantee is expressed save in our standardterms and conditions of sale (available on request), since the conditions of use are beyond our control.
Hallite Seals is continuously improving its range and reserves the right to withdraw or modify any item shown in thiscatalogue.
1Issue Date: Mar 2008
Hallite SealsHallite produces high performancehydraulic sealing solutions for the world’sfluid power industry. The company enjoysan enviable reputation for high quality andreliability within themobile hydraulics,mining, off-highway, construction,agriculture, mechanical handling andautomationmarkets.
Hallite products, engineered in a widevariety of advancedmaterials, are chosenby leadingmanufacturers for theirexceptional performance in themostdemanding, safety-critical highspecification applications.
Hallite operations are located in Australia,Canada, China, France, Germany, Italy,the UK and the USA. All Hallite locationsare committed to providing quality sealsin the shortest possible time. Hallitecombines carefully chosen andmanagedstocks in local markets, supported by afast trackmoulding capability. Mostlocations can now boast a CNCmachiningcell, branded Hallite Service, which canprovide immediate delivery for non-standard and breakdown situations.
Additionally a worldwide network ofservice partners completes the globalpresence and ensures the full range ofHallite products is readily accessible.
United KingdomHallite Seals International Ltd130 Oldfield RoadHamptonMiddlesex
TW12 2HT
T: +44 (0)20 8941 2244F: +44 (0)20 8783 1669email: [email protected]
AustraliaHallite Seals AustraliaPty Limited1/1 St.James PlaceSeven Hills, N.S.W. 2147(PO Box 91)
T: +61 (0)29 620 7300F: +61 (0)29 620 7400email: [email protected]
BrazilHallite do Brasil Tecnologia emVedações LtdaAvenida 5, 1367 - Jd Claret13503-254 Rio Claro, SP -BRASIL
Phone +55 19 35231859Fax + 55 19 35324805email: [email protected]
CanadaHallite Seals (Canada) Ltd89 Galaxy BoulevardUnit 12TorontoOntario M9W 6A4Canada
T: +1 (416) 675 2505F: +1 (416) 675 4341email: [email protected]
ChinaFenner Sealing Technologies(Shanghai) Co, Ltd785 Xing Rong RoadJiading Industrial ParkJiading District ShanghaiChina 201807 P.R.C
T: +86 (0)21 3351 7272F: +86 (0)21 3351 7085email: [email protected]
FranceHallite (France) LimitedZ.A. Les Petits Carreaux,1 Av Des Lys94385 Bonneuil-sur-marne,Cedex.
T: +33 (0) 143 778 550F: +33 (0) 143 779 393email: [email protected]
GermanyDichtelemente Hallite GmbHBillwerder Ring 1721035 Hamburg
T: +49 (0)40 73 47 48-0F: +49 (0)40 73 47 48 49email: [email protected]
ItalyHallite Italia srlVia Leopardi 24/1Livorno57121Italy
T: +39 (0) 58 642 8287+39 (0) 58 642 9734
F: +39 (0) 58 642 9845email: [email protected]
USAHallite Seals USA1966 Heide StreetTroyMichigan 48084USA
T: +1 (248) 362 0170F: +1 (248) 362 3841
www.hallite.com
-45 +110°C400 1.0
-45 +110°C400
700*
700
Profile
bar
700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
°C m/s
Metric
SSeeccttiioonn
Inch
•
660055
661100 161
•
•
•
165
169
143
•
179
662211
175665522
661166
665533 •
700
1.0
•1166 41
1.0-45 +110°C
240
1.0-45 +110°C
-45 +110°C
1.0
-45 +110°C
-45 +110°C
400
400
1.01.0
Seal Designs
Rod Seals
Hallite
Type
Page
•
300
• 700
•
* Pressure rating of seal design can be extended by the use of a back up ring. If this option is required, please seek advice from your local Hallite sales office.
-30 +100°C 4.0
-45 +110°C
Fenner Advanced Sealing Technologies
185666633
Rod Seals
662200 167
bar 700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
°C m/s
•
• •
1155 39
1188 45
•551122 119 0.5-40 +110°C
0.5-30 +100°C500
0.5-30 +100°C300
•551111 115 0.5-40 +110°C350
ProfileMetric
SSeeccttiioonn
Inch
Hallite
Type
Page
Single Acting Rod and Piston Seals
350
Single Acting Rod and Piston Seals
•
•
1.0
1.0
2
Edited with the trial version of Foxit Advanced PDF Editor
To remove this notice, visit:www.foxitsoftware.com/shopping
500
160
400
700
6688 95 •
• •
• •
5544
5533 71 • •
5522 •69
•5511 67
3
5566 79
75
•5500 65
Profilebar 700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
°C m/s
Metric
SSeeccttiioonn
Inch
0.5500 -30 +100°C
350 -30 +100°C 4.0
0.5500
600 -30 +100°C 0.8
700 -30 +100°C 0.5
-30 +100°C 0.5350
-30 +100°C
• •91
5588
6644
83 • •
•
6655
89
-30 +100°C 0.5
0.5-30 +100°C
0.5-30 +100°C
-30 +100°C 0.5
• •7777 0.5-30 +100°C35097
Double Acting Piston Seals
Seal Designs
Double Acting Piston Seals
Hallite
Type
Page
Fenner Advanced Sealing Technologies
bar 700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210°C m/s
• •660011 137 1.0-45 +110°C400
ProfileMetric
SSeeccttiioonn
Inch
Hallite
Type
Page
700*
551133 • 350 -40 +110°C 0.5123
Single Acting Rod and Piston Seals
Single Acting Rod
and Piston Seals
* Pressure rating of seal design can be extended by the use of a back up ring. If this option is required, please seek advice from your local Hallite sales office.
Edited with the trial version of Foxit Advanced PDF Editor
To remove this notice, visit:www.foxitsoftware.com/shopping
350 -30 +110°C
1.5
2.0500
700*
207775555
4
bar 700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
°C m/s
•
775544 203 -40 +110°C 1.0
-40 +110°C 1.0
• •
• •660066
665599
157
183
1.0
400
-45 +110°C
1.0-45 +110°C
700*400
Single Acting Piston Seals
Seal Designs
Double Acting Piston Seals
ProfileMetric
SSeeccttiioonn
Inch
Hallite
Type
Page
ProfileMetric
SSeeccttiioonn
Inch
Hallite
Type
Page
213777700 •
350
350-40 +110°C 1.0
776644 209 • 250 -30 +110°C
•
1.0
Single Acting Piston Seals
350 500**
Fenner Advanced Sealing Technologies
bar °C m/s700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
** Pressure rating of seal design can be extended by using other face material options - see Hallite 754 datasheet.
* Pressure rating of seal design can be extended by the use of a back up ring. If this option is required, please seek advice from your local Hallite sales office.
•
•
Double Acting Piston Seals
-30 +100°C
-40 +120°C
400
500
-40 +110°C
-40 +110°C
700
A
B
•195773355
191 •
771144
773300 0.3
187
775533 199 • 0.5
•
777755 215 •
• 500
1.0
Edited with the trial version of Foxit Advanced PDF Editor
To remove this notice, visit:www.foxitsoftware.com/shopping
-30 +100°C
5
bar 700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
°C m/s
• •
• •
0077 25
0099 29
•1111
•1144 37
33
0.5-30 +100°C
0.5
0.5-30 +100°C400
-30 +100°C400
0.5-30 +100°C700
700
•1133 35 0.5-30 +100°C700
Vee pack sets
Seal Designs
Vee Packs
ProfileMetric
SSeeccttiioonn
InchHallite
Type
Page
Fenner Advanced Sealing TechnologiesUnitised Piston
SSeeccttiioonn
772200 189 •
Hallite
Type
Page
Metric
Inch Profile
-40 +110°C 1.0350
Unitised Piston
•
bar °C m/s700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
°C
•3388
+200
+150
+100
+500-50 543210
m/s
• •3333inch
metric
4.0
4.0
-30 +100°C
-40 +120°C
Notes
Additional wiper sealsare available on
request and includeranges for standardAmerican grooves.
Hallite wipers 33 areproduced in materials thatare capable of operating attemperatures below 0 °C,but they are not designed
to scrape ice.
51
57
Wipers
ProfileMetric
SSeeccttiioonn
InchHallite
Type
Page
Wipers
552200 • 4.0-45 +110°C129
333355 105 • 5.0
Edited with the trial version of Foxit Advanced PDF Editor
To remove this notice, visit:www.foxitsoftware.com/shopping
1.0-40 +100°C
-40 +100°C• •
•
241860
245862
°C
°C
6
Wipers
+200
+150
+100
+500-50 543210m/s
-40 +120°C
5.0
5.0
5.0
-50 +200°C
• •550066 107
•553333 133
•8877 101
Notes +250
+200
+150
+100
+500-50 543210
m/s
-40 +120°C
Notes
Hallite 87, 506, 533 wear strip are alsosuitable for oscillating and rotary
applications.
Hallite 87 and 506 include crosssections that satisfy the requirements
of ISO 10766.
Hallite 506 is available in threedifferent formats; spiral lengths, cutrings and flat coils, see the relevantdata sheet for additional information.
Wipers
Bearings
Seal Designs
Wipers
ProfileMetric
SSeeccttiioonn
Inch
Hallite
Type
Page
ProfileMetric
SSeeccttiioonn
Inch
Hallite
Type
Page
Bearings
Fenner Advanced Sealing Technologies
-45 +110°C
•
•
883311
883344 4.0
4.0
-45 +110°C
-45 +110°C
4.0-45 +110°C
883399 •
221
225
229
233 4.0-45 +110°C• •884422
•239846 4.0
Hallite wipers 834,839 and846 are produced in
materials that are capableof operating at
temperatures below 0 °C,but they are not designed
to scrape ice.
1.0
Edited with the trial version of Foxit Advanced PDF Editor
To remove this notice, visit:www.foxitsoftware.com/shopping
350 -30 +80°C8800 0.1•
-30 +80°C
-45 +110°C600
350
7
Seal DesignsFenner Advanced Sealing Technologies
SSeeccttiioonn
331100 103 •
Hallite
Type
Page
Metric
Inch Profile
-30 +100°C 0.5300
Swivel Seals
bar °C m/s700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
RRoo880000 219 • 0.2
Swivels Seals
Additional
Products
SSeeccttiioonn
665577 181
Hallite
Type
Page
Metric
Inch Profile
-40 +110°C 1.0350
Additional Products
bar °C m/s700
600
500
400
300
200
1000
+200
+150
+100
+500-50 543210
•• STATIC
99
Edited with the trial version of Foxit Advanced PDF Editor
To remove this notice, visit:www.foxitsoftware.com/shopping
Nitrile – medium Synthetic rubber NBR -30 +120 -22 +250 90 IRHD Black HNitrile – high Synthetic rubber NBR -10 +140 -14 +284 80 IRHD Black PNitrile – low Synthetic rubber NBR -45 +100 -45 +212 80 IRHD Black HNitrile – medium Synthetic rubber NBR -30 +120 -22 +250 80 IRHD BlackNitrile – medium Synthetic rubber NBR -30 +120 -22 +250 75 IRHD Black HNitrile – medium Synthetic rubber NBR -30 +120 -22 +250 73 IRHD Black HNitrile – medium Synthetic rubber NBR -30 +120 -22 +250 70 IRHD Black HNitrile – low Synthetic rubber NBR -45 +100 -45 +212 70 IRHD Black HNitrile – medium Synthetic rubber NBR -30 +120 -22 +250 70 IRHD Black HHallprene – Composite Cotton/ -30 +120 -22 +250 Black Hrubber / fabric NBRFluoroelastomer Composite Cotton/ -20 +150 -4 +302 Black Hrubber / fabric FKMFluoroelastomer Synthetic rubber FKM -20 +200 -4 +392 75 IRHD Black HP
Hythane® 181 TPE EU -45 +110 -50 +230 93 IRHD Blue HP
Hallite ® 361 TPE AU -30 +110 -22 +230 96 IRHD Orange HPolyurethane TPE AU -40 +100 -40 +212 94 IRHD Dark bluePolyurethane TPE EU -45 +110 -50 +230 93 IRHD Dark bluePolyurethane TPE EU -45 +110 -50 +230 93 IRHD Black HPolyurethane TPE EU -40 +100 -40 +212 55D GreenStandard polyester TPE -40 +120 -40 +250 55D RedelastomerHydrolysis stabilised TPE -40 +120 -40 +250 55D Grey Hpolyester elastomerHydrolysis stabilised TPE -40 +140 -40 +284 72D Dark Redpolyester elastomerHydrolysis stabilised TPE -30 +100 -22 +212 40D Light greypolyester elastomerLubricated TPE -40 +120 -40 +250 55D Creampolyester elastomerAcetal Eng. plastic POM -45 +120 -50 +250 R115 Orange H
PTFE glass filled Eng. plastic PTFE -50 +200 -58 +392 60D White HPPTFE glass / Eng. plastic PTFE -50 +200 -58 +392 62D Grey HMoS2 filledPTFE Bronze filled Eng. plastic PTFE -50 +200 -58 +392 65D Bronze HPTFE Bronze filled Eng. plastic PTFE -50 +200 -58 +392 72D BronzeHallite® 506 polyester Composite -40 +120 -40 +250 Red/polyesterNylon 12 Eng. plastic PA -40 +120 -40 +250 72D BrownNylon 6 / MoS2 Eng. plastic PA -40 +120 -40 +250 R115 BlackGlass filled Nylon Eng. plastic PA -40 +120 -40 +250 R124 Black
Fenner Advanced Sealing TechnologiesMaterials
Material name Material group Designation Temperature range
°C °F
Hardness Colour
Rod
10
H 11, 12, 13, 14, Vee rings, 33 9000141P P Special material option 9000041
Special material option 9000471H M(1) 50, 53, 65, 68, 77,730, 735, 753 Sealing elements 9001411H 15 9000801H 18 9000271H 16, 54, 754, 755, 770 9000771H Special material option 15, 18, 56, 58 9000211
56, 58 9000111H 11, 13, 14, 15, 18, 21, 51, 52, 56, 58 9400251
H Special material option for standard rubber and rubber 9400431/fabric products. (Additional tooling may be required)
HP HP Special material option for standard rubber and rubber 9020051/fabric products. (Additional tooling may be required)
HP HP M 80, 601, 605, 606, 607, 609, 610, 616, 620 ,621, 652, 653, 9220181656, 657, 658, 659, 834, 839, 842, 846
H H 764, 775 9220361H 860, 862 9220321H 520, 831 9220251
H 511, 512,513 9220221H M Special material option 842 9220371
H H 38, 754, 755 9270061
H M 716, 730, 740 ,750 9270111
H 754, 755, 770 9270051
M(1) 155 9270201
HP 770 9270261
H HP M AE rings 621, Vee pack headers, 9230011Bearing rings 53, 58, 65, 68, 77
HP 16, 54 PTFE02H H 416, 454, 735 CDI702
H 416, 454, 735 CDI741H 87 9200031HP M 506, 507
H Support rings 50, 53, 68 9260041H AE rings735 CDI707
H 533 Dynamic 533
Fenner Advanced Sealing TechnologiesMaterials
Products Compoundreference
Piston
Wiper
Bearing
Key: H- Hydraulic P- Pneumatic M- Suitable for water based fluid (1)- Static applications only
11
12
100+ 100- 30
+ 120- 30 100 90 100 100 * * *
NBR 70 IRHDNBR 90 IRHDNitrile (medium)
100
Fenner Advanced Sealing TechnologiesMaterials and fluid compatibility
Max. continuous working temperatures °C and temperature ranges for materials, within fluid power fluids
+150 +150 +160 +100 +100 +250-40 -40 -50 -30 -30 -50
Material
Continuous
materialservice
temperature
range°C
Interm
ittent
materialservice
temperature
range°C
Motoroils
Hypoidgearoils
Automatic
transm
ission
fluid
ISO6743-4
Hydraulicoils
(HL,HM,HV)
Mineraloilbased
greases
Silicon
based
greases
Dieselfuel
Fuelfor
gasoline/petrol
engines–norm
al
Fuelfor
gasoline/petrol
engines–super
Service Fluids
Maximumcontinuous service temperature in fluids °C
Fluids based onmineral oils Greases Fuels
160
NS
*
130
NS NS NS NS NS NS
160
160
160
+ 200- 20
+ 120- 50
+ 200- 55
+ 130- 30
+ 120- 40
+300 +200+40 -20
+ 100- 30
+ 100- 40
+ 100- 40
+ 100- 40
+ 100- 45
+ 200- 40
+ 200- 200
+ 200- 200
+ 250- 65
+ 250- 20
+ 150- 50
+ 250- 55
+ 150- 30
+ 140- 40
+ 110- 30
+ 110- 45
+ 120- 40
+ 120- 40
+ 120- 40
+ 200- 40
+ 200- 200
+ 130- 200
+ 300- 65
150
NS
*
130
NS
150
150
150
150
150
NS
*
110
NS
150 160 100 100 200 150 150 150
100 100 100
100
100
100100100100
100
100
100
100
100 100 100 100 100
100
100 100 100 100
100
100
100 100 100 100 100
100100 100 100 100 100
100100 100 100 100 100
100100 100 100 100 100 60 60 60
60 60 60
60 60 60
100 100 100
150
150
150
100
NS
*
100
100
NS
100
100
150
NS
NS
*
150
150
150
150
NS
NS
*
150
150
150
150
NS
NS
*
150
150
150
200
120
*
130
120
200
200
250
FKM 75 IRHDFKM 90 IRHDFluoro-elastomer
EPDM 70 IRHDEPDM 80 IRHD
VMQ 70 IRHDSilicone
HNBR 75 IRHDHydrogenatednitrile
IIR Butyl
FFKMPerfluoro-elastomer
AUPolyester PU
EUPolyether PU
Polyester-Elastomer
PAPolyamide
POMAcetal
PPSPolyphenylenesulphide
PTFEPolytetra-fluoroethylene
Thermosettingpolyester resin
PEEKPolyether-etherketone
* Denotes that values vary greatly for individual elastomers within this group NS Denotes that the elastomer is not suitableThe work of the BFPA technical working group ‘TC16/WG8’ in the compilation of this table is acknowldged
13
Fenner Advanced Sealing TechnologiesMaterials and fluid compatibility
6060 60 NS NS 60 60 80 100 NS60 100
Max. continuous working temperatures °C and temperature ranges for materials, within fluid power fluids
+60 +60 +60 +100 +150 +60 +100 +100 +150 +60 (1) +200 +130+5 +5 -30 -50 -0 -10 -40 -50 -50 -5 +2 -50
ISO6743-4
HFB
-Fluids
(60/40
invert
emulsion)
ISO6743-4
HFA-Fluids
(5/95waterbased)
ISO6743-4
HFC
-fluids
(waterglycol)
ISO6743-4
HFD
R-fluids
(phosphateester
ALKYL(Aero))
ISO6743-4
HFD
R-Fluids
(phosphateester
ARYL
(ind.))
ISO6743-4HETG
fluids(Vegetableoil
based)
ISO6743-4HEE
Sfluids(Synthetic
esterbased)
ISO6743-4HEP
Gfluids(Synthetic
glycolbased)
ISO6743-4HEP
Rfluids(Synthetic
hydrocarbons)
Water
Air
Brake
fluids
Service FluidsFire-resistant hydraulic fluids Environmentally acceptable fluids Other service fluids
60
NS
NS
60
NS NS NS 120 120 80
60
60
60
60
NS
NS
60
NS
60
40
60
60
60
60
60
60
60
60
NS
60
NS
60
60
60
NS
40
NS
60
60
60
60
40
60
NS
80
NS
NS
100
100
100
100
100
150
80
NS
NS
120
150 60 100 100 150 150 200 130
100 60 100
100
100
10060100100
100
100
100
100
100 100 80 100 NS
100
100 80 80 80
100
100
100 60 100 100 100
NSNS 60 80 60 100
NSNS 60 80 60 100
NSNS 60 60 60 100 40 40 NS
60 80 NS
60 80 NS
60 80 80
150
150
150
100
NS
NS
60
80
NS
NS
80
100
120
100
130
150
150
150
200
120
200
130
200
200
200
NS
120
80
NS
130
130
130
150
NS
*
130
NS
150
150
150
60
NS
NS
60
NS
60
40
60
60
60
60
60
60
60
60
Maximumcontinuous service temperature in fluids °C
In view of the variations in formulation of both oils and polymers, the compatibility of all combinations should be confirmed by testing and field service performance for each application.(1) Temperature range for water in fluid power applications
Products and Typical Fluid Compatibility
D = Dynamic Application, S = Static ApplicationR = Recommended, P = Possible , NS = Not Suitable
Product FluidsBased onMineral Oil
Water Based Fluids
HFA (5/95) HFB (60/40invertemulsion)
WaterHFC (waterglycol)
HFD(Phosphateester Aryltype)
Other Fluid TypesSyntheticesters(HEES,HFDU)
Air/Nitrogen
D S D S D S D S D S D S D S D SRRoodd SSeeaall
16 R P P P P P P P P P R1 P1 R P P NS
605,610,616 R R P P R R P P P P NS NS R P P P
621,652 R R R R R R P P P P NS NS R P P P
653 R NS NS NS NS NS NS NS NS NS NS NS P NS NS NSRRoodd//PPiissttoonnsseeaallss15,18 R R P R R R R R P R P2 P2 P P P P
511,512,513 R R P P P P P P P P NS NS R R P P
601 R R P R R R P P P P NS NS R R P PDDAA PPiissttoonnsseeaallss50,53,64,68 R R P R R R P3 P3 P R NS NS P P NS P
51,52,56,58 R R P R R R R R P P P2 P2 P P NS P
54 R P P R P P P P P P R1 P1 R P P NS
65,77 R R P R R R R R P P NS NS P P NS P
714 R NS NS NS NS NS NS NS NS NS P1 NS R NS NS NS
730 R R R R R R NS NS P P NS NS R P NS P
735 R P NS NS P P P P NS NS NS NS R P NS NS
753 R R NS NS NS NS NS NS NS NS NS NS R P NS NS
754,755 R R P R P R NS NS P P NS NS R R P P
764 R R NS NS NS NS NS NS NS NS NS NS R R P P
770 R R P P P P NS NS P P NS NS R R P PSSAA PPiissttoonnSSeeaallss
606,659 R R P P R R P P P P NS NS R P P PUUnniittiisseeddPPiissttoonn720 R P NS NS NS NS NS NS NS NS P4 P4 R P NS NS
VVeeee PPaacckkss
07,09,11,13,14 R P P P R P R P P P P2 P2 P P NS NS
1 Suitable energiser material required e.g. FKM,EPDM. N.B. NBR unsuitable.2 Suitable compounds required e.g FKM,EP. N.B. NBR unsuitable.3 Use PA backing rings, not polyester.4 Suitable seal set required.
In view of the variation in formulation of oils and other hydraulic fluids, the compatibility of all combinations should beconfirmed by testing and field service performance for each application.
Fenner Advanced Sealing Technologies
14
Use and fitting of seals
1 136
64 45 4 36
33
5
3 3
Typical hydraulic cylinder layout showing installation features to be considered for satisfactory seal life.
Our quality control methods for materialand manufacturing processes ensurethat all seals leaving our factories are ina condition capable of giving a long andreliable service life.
We have found from many yearsexperience, that premature seal failurecan be avoided if the followingrecommendations are considered at thedesign and manufacturing stage of thecylinder:
1 Specify piston and gland bearingswhich are adequately proportioned tosupport the cylinder loads.
As a result of mountingmisalignments and / or the workingaction of the cylinder, piston andgland bearings will be subjected toside-loading, causing damage to therod or the tube surface and hence theseal, if the bearings are inadequate.
2 Ensure that seals are storeddistortion free in a cool, dry and darkplace prior to fitting.(See page 17)
3 Check that the seal housing is freefrom damage likely to harm the seal.
Remove all sharp edges and burrsfrom metal parts, paying particularattention to ports, grooves andthreads over or through which theseal passes during assembly.
4 Clean all seal housing areas, ensuringthat all metallic particles and othercontaminants have been removed.Check that other surfaces adjacent tothe passage of the seal on fitting arealso free of dirt, swarf or othercontaminants. Check that both staticand dynamic housing surface finishesmeet specifications.
5 Where the difference between athread diameter over which the sealmust pass and the seal diameter issmall, use some form of protectionover the thread, such as a fittingsleeve made of hard plastic.
6 Check that the seal is of the correcttype, part number and size, and thatthe specified material is correct. Ifthere is any doubt regarding thematerial contact your local Hallitesales office.
7 Lubricate all seals and metalcomponents liberally with cleanoperating fluid or a compatible greaseprior to assembly. N.B. Siliconegrease should not be used in normalhydraulic applications.
8 Where seals fitted to sub-assemblies,such as pistons, are awaiting furtherfitting operations, ensure that theseals are not subjected to anymisaligned or localised loading whichwill cause local deformation. Ensurethat sub-assemblies remain clean.
9 The use of metal levers is notrecommended but should they beused it is imperative that they arecompletely smooth and free fromnicks and burrs. When using themensure that the metal surfacesadjacent to the seal are not damaged.
10 Flush the hydraulic systemthoroughly before connecting thecylinder to it.
Fenner Advanced Sealing Technologies
15
Operating conditions
350 bar 5000 psi160 bar 2300 psiNo Pressure Peaks
500 bar 7500 psi250 bar 3600 psiIntermittent Pressure Peaks
700 bar 10000 psi400 bar 6000 psiRegular Pressure Peaks
Design Lower operating stressesRigid well aligned mounting,minimal side loading.
Steady operating stresses withintermittent high stress, some side loading.
Highly stressed for majority of itsworking life. Side loadingcommon.
Condition of Fluid Good system filtration no cylinder contamination likely.
Good system filtration but some cylinder contamination likely.
Contamination unavoidable frominternal and external sources.
Working Environment Clean and inside a building.Operating temperature variationslimited.
Mixture of indoor and outdoors but some protection from theweather.
Outdoors all the time or a dirtyindoor area. Wide variations intemperature, both ambient andworking. Difficult serviceconditions.
Usage Irregular with short section ofstroke at working pressures.Regular usage but at lowpressure.
Regular usage with most of thestroke at working pressure.
Large amount of usage at highpressure with peaks throughoutthe stroke.
Typical Applications Machine toolsLifting equipmentMechanical handlingInjection moulding machinesControl and robot equipmentAgricultural machineryPackaging equipmentAircraft equipmentLight duty tippers
Heavy duty lifting equipmentAgricultural equipmentLight duty off-road vehiclesCranes and lifing platformsHeavy duty machine toolInjection moulding machinessome Auxiliary mining machineryAircraft equipmentPressesHeavy duty tippers (telescopic)Heavy duty mechanical handling
Foundry and metal fabricationplantMining machineryRoof supportsHeavy duty earth movingmachineryHeavy duty off-road vehiclesHeavy duty presses
Pressure MaxNormalWorking
Cylinder specification Light duty Medium duty Heavy duty
Pressure, Speed,Temperature Range
From many years of applicationexperience with sealing hydraulicequipment, supported by the resultsfrom an extensive test programme, weknow that it is necessary to link thethree main operating features of speed,pressure, and temperature to achieve asatisfactory seal performance. Aftercarefully considering each product weare able to specify the maximum speedand pressure with a temperature rangewithin which the seal will operatesafely.
If your operating conditions do notcomply with those recommendedplease send your details to your localHallite sales office.
Fenner Advanced Sealing Technologies
16
Housing designs & seal options
Piston
Heavyduty
Type58
Gland
Cylinder housings and seal options
The following diagrams illustrate howHallite’s wide range of products can beapplied to a selection of some of themost popular cylinder designs servicingthe world’s fluid power industry.
The diagrams show different gland andpiston arrangements to illustratealternative sealing methods currently inuse and a suitable Hallite product.
If the application which you areinterested in is of a non-standardnature please contact Hallite’stechnical department.
Heavyduty
Type13, 14
Heavyduty
Type51, 52
Heavyduty
Type18
Heavyduty
Type621,652, 653
Heavyduty
Type730, 735
Mediumduty
Type601, 605
Mediumduty
Type753
Fenner Advanced Sealing Technologies
17
Housing designs & seal options
Gland Piston
Mediumduty
Type601, 605
Mediumduty
Type606
Mediumduty
Type605
Mediumduty
Type53
Mediumduty
Type513
Mediumduty
Type511, 512
Light to Mediumduty
Type616, 16
Light to Medium
duty
Type754, 755
770
High speed light duty
Type16
High speedlight duty
Type54
Fenner Advanced Sealing Technologies
18
Housing & installation data
Hallite 87 strip is a low friction bronze filled PTFE compoundproduced in a flat tape style ready for easy cutting to size tosuit individual applications and is particularly effective infriction conscious applications such as servo cylinders.
Hallite 506 can be supplied in spiral lengths, generally in 10metre, as individual cut bearings and also in 10 metre lengthspacked flat in a box dispenser. Hallite 506 bearing strip ismanufactured to extremely accurate thickness tolerances,ensuring reliable cylinder alignment. Other sizes of type 506are available on request, special sections and diameters canalso be produced to suit individual requirements.
Bearing Type Standard material87 PTFE + Bronze506 Polyester + PTFE533 GFN
Hallite 87, 506 & 533 bearing strip
250
200
150
100
50
00 20 40 60
Hallite 506
Acetal
Hallite 87
GFN
Compressive Strain %
Stress MPa
Hallite 506 specified tolerances
Bearing length Bearing cross sectionL1 S
Tolerances (in) -0.005 to -0.025 -0.001 to -0.003
Hallite 506 specified tolerances
Bearing length Bearing cross sectionL1 S
Tolerances (mm) -0.1 to -0.6 -0.02 to -0.08
Bearing strip housing tolerancesAs tolerances are not specified “on line” for types 87 & 506,please refer to the information below and on the next pagefor tolerances as indicated on the product’s data sheet.
Compressive bearing stress versus strainfor non metallic materials
Hallite 533 specified tolerances
Bearing length Bearing cross sectionL1 S
Tolerances (in.) -0.000 to -0.010 -0.001 to -0.004
Hallite 87 specified tolerances
Bearing length Bearing cross sectionL1 S
Tolerances (mm) -0.1 to -0.5 +0.03 to -0.05
Fenner Advanced Sealing Technologies
19
Housing & installation data
Specified tolerances
Nominal sizes Shafts (outside diameter) Bores (inside diameter)mm Units 0.001 mm Units 0.001 mm
over to f8 f9 h8 h9 h10 h11 js10 js11 H8 H9 H10 H11 Js11
1.6 3 -6 -6 0 0 0 0 +20 +30 +14 +25 +40 +60 +30-20 -31 -14 -25 -40 -60 -20 -30 0 0 0 0 -30
3 6 -10 -10 0 0 0 0 +24 +37.5 +18 +30 +48 +75 +37.5-28 -40 -18 -30 -48 -75 -24 -37.5 0 0 0 0 -37.5
6 10 -13 -13 0 0 0 0 +29 +45 +22 +36 +58 +90 +45-35 -49 -22 -36 -58 -90 -29 -45 0 0 0 0 -45
10 18 -16 -16 0 0 0 0 +35 +55 +27 +43 +70 +110 +55-43 -59 -27 -43 -70 -110 -35 -55 0 0 0 0 -55
18 30 -20 -20 0 0 0 0 +42 +65 +33 +52 +84 +130 +65-53 -72 -33 -52 -84 -130 -42 -65 0 0 0 0 -65
30 50 -25 -25 0 0 0 0 +50 +80 +39 +62 +100 +160 +80-64 -87 -39 -62 -100 -160 -50 -80 0 0 0 0 -80
50 80 -30 -30 0 0 0 0 +60 +95 +46 +74 +120 +190 +95-76 -104 -46 -74 -120 -190 -60 -95 0 0 0 0 -95
80 120 -36 -36 0 0 0 0 +70 +110 +54 +87 +140 +220 +110-90 -123 -54 -87 -140 -220 -70 -110 0 0 0 0 -110
120 180 -43 -43 0 0 0 0 +80 +125 +63 +100 +160 +250 +125-106 -143 -63 -100 -160 -250 -80 -125 0 0 0 0 -125
180 250 -50 -50 0 0 0 0 +92 +145 +72 +115 +185 +290 +145-122 -165 -72 -115 -185 -290 -92 -145 0 0 0 0 -145
250 315 -56 -56 0 0 0 0 +105 +160 +81 +130 +210 +320 +160-137 -186 -81 -130 -210 -320 -105 -160 0 0 0 0 -160
315 400 -62 -62 0 0 0 0 +115 +180 +89 +140 +230 +360 +180-151 -202 -89 -140 -230 -360 -115 -180 0 0 0 0 -180
400 500 -68 -68 0 0 0 0 +125 +200 +97 +155 +250 +400 +200-165 -223 -97 -155 -250 -400 -125 -200 0 0 0 0 -200
500 630 -76 -76 0 0 0 0 +140 +220 +110 +175 +280 +440 +220-186 -251 -110 -175 -280 -440 -140 -220 0 0 0 0 -220
630 800 -80 -80 0 0 0 0 +160 +250 +125 +200 +320 +500 +250-205 -280 -125 -200 -320 -500 -160 -250 0 0 0 0 -250
Nominal sizes Shafts (outside diameter) Bores (inside diameter)in. Units 0.001 in. Units 0.001 in.
over to f8 f9 h8 h9 h10 h11 js10 js11 H8 H9 H10 H11 Js110.04 0.12 -0.3 -0.3 0 0 0 0 +0.8 +1.3 +0.6 +1.0 +1.6 +2.5 +1.3
-0.9 -1.2 -0.6 -1.0 -1.6 -2.5 -0.8 -1.3 0 0 0 0 -1.30.12 0.24 -0.4 -0.4 0 0 0 0 +0.9 +1.5 +0.7 +1.2 +1.8 +3.0 +1.5
-1.1 -1.6 -0.7 -1.2 -1.8 -3.0 -0.9 -1.5 0 0 0 0 -1.50.24 0.40 -0.5 -0.5 0 0 0 0 +1.1 +1.8 +0.9 +1.4 +2.2 +3.5 +1.8
-1.4 -1.9 -0.9 -1.4 -2.2 -3.5 -1.1 -1.8 0 0 0 0 -1.80.40 0.71 -0.6 -0.6 0 0 0 0 +1.4 +2.0 +1.0 +1.6 +2.8 +4.0 +2.0
-1.6 -2.3 -1.0 -1.6 -2.8 -4.0 -1.4 -2.0 0 0 0 0 -2.00.71 1.19 -0.8 -0.8 0 0 0 0 +1.8 +2.5 +1.2 +2.0 +3.5 +5.0 +2.5
-2.0 -2.8 -1.2 -2.0 -3.5 -5.0 -1.8 -2.5 0 0 0 0 -2.51.19 1.97 -1.0 -1.0 0 0 0 0 +2.0 +3.0 +1.6 +2.5 +4.0 +6.0 +3.0
-2.6 -3.4 -1.6 -2.5 -4.0 -6.0 -2.0 -3.0 0 0 0 0 -3.01.97 3.15 -1.2 -1.2 0 0 0 0 +2.3 +3.5 +1.8 +3.0 +4.5 +7.0 +3.5
-3.0 -4.1 -1.8 -3.0 -4.5 -7.0 -2.3 -3.5 0 0 0 0 -3.53.15 4.73 -1.4 -1.4 0 0 0 0 +2.5 +4.5 +2.2 +3.5 +5.0 +9.0 +4.5
-3.6 -4.8 -2.2 -3.5 -5.0 -9.0 -2.5 -4.5 0 0 0 0 -4.54.73 7.09 -1.6 -1.6 0 0 0 0 +3.0 +5.0 +2.5 +4.0 +6.0 +10.0 +5.0
-4.1 -5.6 -2.5 -4.0 -6.0 -10.0 -3.0 -5.0 0 0 0 0 -5.07.09 9.85 -2.0 -2.0 0 0 0 0 +3.5 +6.0 +2.8 +4.5 +7.0 +12.0 +6.0
-4.8 -6.5 -2.8 -4.5 -7.0 -12.0 -3.5 -6.0 0 0 0 0 -6.09.85 12.41 -2.2 -2.2 0 0 0 0 +4.0 +6.0 +3.0 +5.0 +8.0 +13.0 +6.5
-5.2 -7.3 -3.0 -5 -8.0 -12.0 -4.0 -6.0 0 0 0 0 -6.512.41 15.75 -2.5 -2.5 0 0 0 0 +4.5 +7.0 +3.5 +6.0 +9.0 +14.0 +7.0
-6.0 -8.0 -3.5 -6.0 -9.0 -14.0 -4.5 -7.0 0 0 0 0 -7.015.75 19.69 -2.8 -2.8 0 0 0 0 +5.0 +8.0 +4.0 +6.0 +10.0 +16.0 +8.0
-6.5 -8.8 -4.0 -6.0 -10.0 -16.0 -5.0 -8.0 0 0 0 0 -8.019.69 24.80 -3.0 -3.0 0 0 0 0 +5.5 +8.7 +4.3 +6.9 +11.0 +17.3 +8.7
-7.0 -9.9 -4.3 -6.9 -11.0 -17.3 -5.5 -8.7 0 0 0 0 -8.724.80 31.49 -3.1 -3.1 0 0 0 0 +6.3 +9.8 +4.9 +7.9 +12.6 +19.7 +9.8
-8.1 -11.0 -4.9 -7.9 -12.6 -19.7 -6.3 -9.8 0 0 0 0 -9.8Tolorances extracted from BS 1916 &BS 4500 (ISO 286) with kind permission of British Standards Institution
Fenner Advanced Sealing Technologies
20
Housing Design
Extrusion is closely linked to pressure and temperature. Ingeneral, the best seal performance and life is provided byspecifying the smallest possible extrusion gap.
The figures shown for the extrusion gap within the operatingconditions of Hallite’s product data sheets, relate to themaximum permissible, worst case situation with the gap allon one side.
Hallite Seals’ product data sheets give information indicatingthe allowable extrusion gap a seal can see at pressure duringits working life. The extrusion gap can be calculated using thetolerance build ups within the cylinder and any dilation thatmay occur under pressure.
Maximum extrusion gap = F max (see drawing below).
F max is the maximum extrusion gap for the seal
Minimum metal to metal clearance = F min (see drawingbelow).
F min for cylinders with minimal side loading should be> 0.1mm (0.004”).
RodsMaximum extrusion gap
F max = (ØD3 max + ØD2 max) - S min - Ød1 min2
Minimum metal to metal clearance (extrusion gap)
F min = S min - (ØD2 max - ØD3 min)2
Rod Bearing
Piston Bearing
PistonsMaximum extrusion gapF max = ØD1 max - S min - (Ød3 min + Ød2 min) + dilation
2
Minimum metal to metal clearance (extrusion gap) F min = S min - (Ød3 max - Ød2 min)
2
Calculate both F max and F min.
Ensure the F min is greater than 0.1mm (0.004”) and F max isless than the maximum extrusion gap stated on the seal datasheet at the application’s working pressure.
For built-in metal bearings, the extrusion gap calculation issimpler.
For F max:Rod = ØD3 max - Ød1 minPiston = ØD1 max - Ød3 min + dilation
F min must be zero
1.2
1.0
0.8
0.6
0.4
0.2
00 100 200 300 400 500 600 700
Hallite 735
800
Hallite 754Hallite 755
Type 735, 754, 755
Pressure bar
Extrusion gap (m
m)
Hallite 612Hallite 621Hallite 631
Pressure bar
Extrusion gap (m
m)
Type 15, 16, 18
0 100 200 300 400 500 600 700 800
1.2
1.0
0.8
0.6
0.4
0.2
0
Hallite 601Hallite 605Hallite 606Hallite 610Hallite 659
Hallite 621
Hallite 652
Pressure bar
Extrusion gap (m
m)
Type 601, 605, 606, 610, 621, 652, 659
0 100 200 300 400 500 600 700 800
1.2
1.0
0.8
0.6
0.4
0.2
0
Hallite 07Hallite 09 Hallite 13Hallite 11 Hallite 14
Pressure bar
Extrusion gap (m
m)
Vee pack sets
Glandbore
diameterØD
Roddiameter
Ød
Bearinghousingdiameter
ØD
F min
F max
S
Rod
Housing
Rod sealgroove
2
1
3
F max
Bearinghousingdiameter
Ød
Pistondiameter
Ød
S
Bearingsection
F min
Borediameter
ØD
Cylinder
Piston
Piston sealgroove
3
2
1
Note: Rod is not concentric withgland, because of clearances.(shown exaggerated)
Note: Piston is not concentric with cylinder bore, because ofclearances. (shown exaggerated)
1.2
1.0
0.8
0.6
0.4
0.2
Hallite 16
Hallite 15Hallite 18
0 100 200 300 400 500 600 700 8000
Fenner Advanced Sealing Technologies
21
Housing Design
This should be read in conjunction with the section Housing Designs in the Hallite Fluid Power Seal Catalogue
Extrusion gaps and metal-to-metal clearance
The use of remote bearing strips, such as Hallite 506, often creates a conflict between maximising the metal-to-metal clearance, toavoid metal-to-metal contact, and minimising the extrusion gap for the seal. The design decisions that have to be made in thisrespect are not trivial. The following examples show the effects of looser and tighter tolerances on the minimum metal-to-metalclearance and the maximum extrusion gap. The values have been calculated using the housing design formulae. No allowance hasbeen made for the deflection of the bearings under side load, and, in the case of the piston examples, for the cylinder dilation.
Fenner Advanced Sealing Technologies
22
Gland for 50mm rod using ‘standard’ tolerances
Gland for 50mm rod with tighter tolerances, showing that the minimum metal-to-metal clearances can be increased and themaximum extrusion gap reduced.
Piston for 80mm bore using ‘standard’ tolerances
Piston for 80mm bore with tighter tolerances showing that minimum metal-to-metal clearance can be increased and maximumextrusion gap reduced.Once the maximum extrusion gap has been calculated the correct seal can be specified with regard to therequired operating pressure of the cylinder
For further advice, please contact Hallite Seals
Surface roughness
Rt
AIR
METAL
RqRa
Mean line
Bore surface finishes can be more problematic. The typical methods of obtaining a bore finish aresummarised in the figure below. Drawn over mandrel (DOM)tubing, as is, can be adequate, or a potential disasterdepending on the actual surface texture achieved and theapplication. Increasing use is being made of Special SmoothInside Diameter (SSID) DOM tubing, but in certaincircumstances, mainly when the seal is being driven into thepressure, it can lead to wear of the seal through flow erosion.Such DOM tubing requires careful specification. Theconsistency of roller burnished or honed tube is to bepreferred. Skived and roller burnished tubing is very smooth(less than 0.1µm Ra) (4 µin CLA) and may be too smooth forrubber sealing elements in some applications. True honedtube, produced between (0.1 and 0.4 µm Ra) (4-16 µin CLA) isthe most expensive, but has the best finish.
Static surface finishes
The static sealing surface finish must not be ignored in thecontrol of leakage. Generally, these are fine turned andshould be free from chatter marks.
Surface roughness has a very important influence on the lifeand leakage performance of a recipricating sealing system.
Note : The vertical scale is 40 times the Horizontal scale
Definitions
Many parameters can be used to describe surface finishesand these are explained in ISO 4287 and ISO 4288. Those inmost common use in the fluid power industry include:-
Ra, which is defined as the arithmetical mean deviation of theassessed profile. The inch equivalent parameter is CLA(centre line average). A surface finish of 0.4 µm Ra is exactlyequivalent to 16 µin CLA.
Rt, which is the total height of the profile.There is nomathematical relationship between Ra and Rt.
Rq, which is the root mean square deviation of the assessedprofile. The equivalent term in inches is RMS (Root MeanSquare). The Rq (RMS) of a surface is approximately 10%greater than the Ra (CLA) value.
The surface roughness parameters given above do not giveany indication of the sharpness of the surface. The peaks ofthe profile should be well rounded as sharp surface finishescan lead to rapid seal wear.
Dynamic surface finishes
Piston rods are generally hard chrome plated. The hardnessshould be at least 67 Rockwell C. This gives an excellenttribological surface and provided the rods are produced by anestablished supplier within a surface finish range of 0.1 to 0.3µm Ra (4-12 µin CLA) no major problem should ensue,although the optimum surface finish may well depend on theseal material.
Hot drawn tube Rolled and welded tube
Cold drawn over mandrel (DOM)(This improves mechanical properties by work hardening)
Honed(Internally ground)
Surface Finish0.1 - 1.6 µm Ra(4-64 µin CLA)
Typically 0.4 µm Ra(16 µin CLA)
Surface texturecharacteristiccross-hatchedpattern of fine grooves
(Emery lap-onedirectional)
Skived and Roller Burnished
Surface Finish< 0.1 µm Ra(< 4 µin CLA)
Surface texturecharacteristiccircumferential
lines(optical effect)
Fine Finished DOM
(i.e. as drawn)
Surface Finish> 0.1 µm Ra(> 4 µin CLA)
Surface TextureMatt Grey
(Possibly with axial lines)(SSID tubingis reflective)
Methods of manufacturing of tubes for hydrauliccylinders and resulting surface textures.
Fenner Advanced Sealing Technologies
23
24
Storage of seals
Storage conditions
Most polymeric items including vulcanized rubber and otherelastomers tend to change their properties during storageand may become unserviceable. This may be due tohardening, softening, cracking, crazing or other degradationand may be the result of oxygen, ozone, light, heat and/orhumidity.
The following recommendations indicate the most suitableconditions for storing elastomeric items, whether as a singleitem or composite product.
1 TemperatureStorage temperatures should not exceed 50º C (120ºF).Low temperatures are not permanently harmful providedthe rubber items are handled carefully and not distorted.When taken from low temperatures items should be raisedto approximately 30ºC ( 70ºF)before they are used.
2 HumidityOptimum humidity is about 65% in a draft-freeatmosphere.
3 LightProtection from direct sunlight and strong artificial lightwith a high ultraviolet content is important. Unless packedin opaque containers, it is advisable to cover windows withred or orange screens or coatings.
4 Oxygen and OzoneElastomeric items should be protected from circulating airwherever possible. As ozone is particularly harmful torubber, storage rooms should be free from equipment thatmay give rise to electric sparks or discharge. Wrapping,storage in airtight containers or other suitable meansshould be used for vulcanised rubber items.
5 DeformationWhere possible, rubber items should be stored in a relaxedposition, free from tension or compression. Laying theitem flat and avoiding suspension or crushing keeps it freefrom strain and minimises deformation.
6 Contact with Liquid and Semi-Solid MaterialContact with liquids and semi-solid materials, particularlysolvents, such as oils or greases should be avoided unlessso packed by the manufacturer.
7 Contact with MetalsMetals such as manganese, iron and copper, or copperalloys can have a harmful effect on rubber. A layer ofpaper, polyethylene or cellophane will keep theseseparated.
8 Contact with Non-MetalsContact with other rubbers or creosotes should be avoided.
9 Stock RotationElastomers should be stored for as short a period aspossible, and strict stock rotation should be practiced.
10 CleaningOrganic solvents such as trichloroethylene, carbontetrachloride and petroleum are the most harmful agents.Soap and water and methylated spirits are the leastharmful, and all parts should be dried at room temperaturebefore use.
11 Shelf LifeThe table shows the storage life of seal components madefrom the more common materials under ideal conditions.Storing under less than ideal conditions will reduce the life.
Careful inspection of the following should be made before installation after storage:
a Mechanical damageb Permanent distortionc Cracks or surface crazingd Tackiness or surface softening/hardening
Thin components (less than 1.6mm {1/16in}) tend to be more critically affected.
The appearance of 'bloom' is relatively unimportant, exceptin certain non-toxic applications.
Base Polymer Primary storage Extension of(ISO Designation) period (years) storage period
after re-inspection (years)
FLUOROCARBON (FKM) 10 5ETHYLENE PROPYLENE (EPDM)
NITRILE (NBR)HYTHANE (EU) 7 3THERMOPLASTIC POLYESTER ELASTOMER
POLYUERETHANE (AU) 5 2
ENGINEERING THERMOPLASTICS:ACETAL (POM)POLYAMIDE (PA) UNLIMITEDGLASS FILLED NYLON (PA)PTFEPOLYPHENYLENE SULPHIDE (PPS)
ENGINEERING THERMOSETS:TYPE 506 BEARING STRIP UNLIMITED
Fenner Advanced Sealing Technologies