o-rings

O-RINGSTHE WORLDS MOST POPULAR AND VERSTILE SEAL

O RING HAS BECOME WORLDS MOST POPULAR AND VERSTILE SEAL DUE TO ITS SIMPLE SHAPE , LOW SPACE REQUIREMENT AND ITS AVAILIBILTY IN VERY VAST SIZES AND COMPOUNDS

Why ORing used most:

O-Rings offer the designer an efficient and economical sealing element for a wide range of static or dynamic applications.A wide choice of Elastomers for both standard and special applications allow the O-Ring to be used to seal practically all liquid and gaseous media.The dimensions of the O-Ring are defined by the inside diameter d1 and the cross section d2. O-rings of Cross sections approx. 0.35 to 40 mm and inside diameters up to 5,000 mm and more are available.

Why ORing used most:

Compared with other sealing elements, the O-Ring hasa wide range of advantages:Simple, one piece groove design reduces hardwareand design costsCompact design allows smaller hardwareEasy, foolproof installation reduces riskApplicable to a wide range of sealing problems, static,dynamic, single or double actingWide compound choice for compatibility with mostfluidsEx stock availability of many sizes worldwide for easymaintenance and repair.

O-RINGS ARE MANUFACTURED IN VAREITY OF STANDARDSAS 568A USA BS 1806 ENGLANDDIN 3771GERMANYSMS 1586SWEDENAFNOR 47501FRANCEJIS B2401JAPANISO 3601INTERNATIONAL

O-ring sealing PrincipleO-rings are bi-directional seals, Circular in shape and cross section. Generally made of elastomeric material, but may be made of others material such as PTFE.

O ring sealing PrincipleAn O-ring seals through the deformation of the seal material by installation and media pressure to close off the gap b/w matting components.

O ring sealing PrincipleAll sealing applications fall into one of two categories those in which the seal or sealed surface moves and those in which the seal is stationary.

O ring sealing PrincipleThese are further defined as reciprocating seals (seals exposed to linear motion) and rotary Seals (stationary seals exposed to a rotating shaft). O-rings are successfully use in static as well as dynamic applications.

O ring sealing PrincipleThe rubber O-ring should be considered as an incompressible viscous fluid having a very high surface tension. Whether by a mechanical pressure from the surrounding geometry or by pressure transmitted through the hydraulic fluid or gas. This extremely viscous fluid is forced to flow in the gland to produce zero clearance or a positive block to the flow of the media being sealed. the o-ring absorbs the stack-up of tolerances of the unit and its memory maintains a sealed condition.

O ring sealing PrincipleDynamic O-rings may fail by abrasion against the cylinder or piston walls. Therefore the contacting surfaces should be polished for long seal life. Moving O-rings that pass over ports or other surface irregularities while under pressure are quickly damaged.

O ring sealing PrincipleIn reciprocating applications, for any given piston or rod diameter, O-rings with smaller cross sections tends to twist in the groove while in motion. This leads to leakage and failure. The smaller cross section for each inside diameter are therefore omitted in the reciprocating design tables.For dynamic applications, the largest cross sectional sizes available should be used to increase stability.

O ring sealing PrincipleThe tendency of an o-ring to return to its original shape when the cross section is deflected is the basic reason why o-ring make excellent sealing.

O ring sealing PrincipleThe squeeze or rate of compression is a major consideration in O-ring seal design. O-rings with smaller cross sections are squeezed by higher %age to overcome the relatively higher groove dimensional tolerance.

O ring sealing PrincipleIn static applications the recommended squeeze is usually between 15-30%. In some cases the very small cross sections can even by squeezed up to 30%.In vacuum application the squeeze can even be higher. Squeezing more then 30% induces additional stress which may contribute to early seal deterioration.In dynamic applications the recommended squeeze is b/w 8-16% due to friction and wear consideration. Smaller cross sections may be squeezed as much as 20%.

Sealing TipsWithin reason, the larger the cross section, the more effective the sealAvoid sealing axially and radially at same time with same O-ring or quad ring.Dont use a seal as a bearing to support a load or center a shaft, this well eventually cause seal failure.

Sealing TipsSelecting material consider:The primary fluids which the O-ring will sealOther fluids to which the seal will be exposed, such as cleaning fluids or lubricantsThe suitability of material for the applications as temperature extremes hot and coldThe presence of abrasive external contaminantsKeep the seal stationary in its groove-Dont let it spin with the rotating memberWith a face seal, dont try to seal around a squre corner, corners must have a minimum radius of 4 times the seal cross section.

O ring ApplicationsAlthough sealing applications can be classified in many different ways. A common method for classifying sealing applications is by the type of motion experienced by the application. The common application types are:

O ring Applications

O ring ApplicationsThe O-ring is one of the most popular seal choices because:O-ring is Cost effective and the cost to machine the seal groove is relatively low.As a bi-directional squeeze seal, o-ring can be used in extremely wide variety of applications (both static and dynamic) The O-ring material allows for maximum stretch or compression and is therefore quiet easy to install, generally requiring no special tools.

O ring Applications (STATIC)There are four varieties of static applications:1. AXIAL:The O-ring cross section is squeezed axially in the groove similar to a flat gasket.

O ring Applications (STATIC)2. RADIAL:The O-ring cross section is squeezed radially in the groove between the inside (ID) and outside (OD).

O ring Applications (STATIC)3. DOVETAIL: The O-ring cross section is axially squeezed in the dovetail groove, The groove design allows the o-ring to be retained in the face seal during assembly and maintenance. This is beneficial for special application where the O-ring has to be fixed by the groove e,g, a lid which open regularly

O ring Applications (STATIC)4. BOSS SEALS:The O-ring is used for sealing straight thread tube fitting in a boss. A boss is cylindrical projection on a casting or forging. The end of that projection is machined to provide a flat, section smooth surface for sealing. Straight threads used with an O-ring provide a better seal then tapered threads used alone.

O ring Applications (DYNAMIC)There are three varieties of dynamic applications as noted below:1. RECIPROCATINGReciprocating seals refer to seals used in applications that slide back and forth. This motion introduces friction, which creates design considerations different from those of static seals. The O-ring may be housed in a groove (rod seal) in the cylinder wall instead of a groove in the piston surface (piston seal) without any change in design limitations or seal performance.

O ring Applications (DYNAMIC)2. OSCILLATINGOscillating applications are those seeing both rotary and reciprocating movement. A valve spindle is an example of an oscillating application.

O ring Applications (DYNAMIC)3. ROTARYRotary seals refer to seals used in applications that rotate.

B A S I C E L A S T O M E R S

According to the definition of the American Society for Testing and Materials (ASTM) for the term "elastomer it is essential that:An elastomer must not break when stretched approximately 100%. After being stretched 100%, held for 5 minutes and then released, it must retract to within 10% of its original length within 5 minutes after release.


Though "ELASTOMER" is synonymous with "rubber", it is more formally a polymer that can be modified to astate exhibiting little plastic flow and quick or nearly complete recovery from an extending force, and upon immediate release of the stress, will return to approximately its own shape.


A COMPOUND is a mixture of base polymer and other chemicals which form a finished rubber material. More precisely, the term compound refers to a specific blend of ingredients tailored for particular characteristics required to optimize performance in some specific service. such as carbon black, colored pigments, curing or vulcanizing agents, activators, plasticizers, accelerators, anti-oxidants or anti radiation addiditives. There may be hundreds of such combinations.

The following contains the nomenclature used for the different elastomer types per ASTM D 1418 and ISO 1629

Acrylonitrile butadiene, Nitrile or Buna N (NBR)B A S I C E L A S T O M E R SNitrile, chemically, is a copolymer of butadiene and acrylonitrile. Acrylonitrile content varies in commercial products from 18% to 50%. As the nitrile contentincreases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases.The table indicates the change of properties as a function of acrylonitrile content.

Description: Standard Nitrile is also known as Buna-N. Excellent resistance to petroleum-based oils and fuels, water and alcohols. Nitrile also has good resistance to acids and bases, except those with a strong oxidizing effect.Limitations: Avoid highly polar solvents (Acetone, MEK, etc.) and direct exposure to ozone and sunlight.Chemistry: Copolymer of butadiene and acrylonitrile. By varying the acrylonitrile content, elastomers with improved oil/fuel swell or with improved low-temperature performance can be achieved. Specialty versions of carboxylated high-acrylonitrile butadiene copolymers (XNBR) provide improved abrasion resistance. And hydrogenated versions of these copolymers (HNBR) provide improve chemical and ozone resistance elastomers.Trade Names: CHEMIGUM , HYCAR , PARACRIL , PERBUNAN ASTM D1418 Designation: NBR, XNBR, HNBRASTM D2000/SAE J200 Type, Class: BF, BG, BK, CHTemperature Range: 55 to 120C (65 to 248F)Typical Uses: Ion Implant, PVD* Buna-N is available in a wide range of Durometers and Colors, as well as many compound variations designed to meet specific applications.

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %22Hr C/S @ 100CLow TempHigh TempB1000Black7015.0 (2,150)4001040C(40F)120C(248F)

Ethylene propylene rubber is an elastomer prepared from ethylene and propylene monomers (ethylene propylene copolymer) and at times with an amount of a third monomer (ethylene propylene terpolymers). Ethylene propylene rubber has a temperature range of -50C to +120/150C (-60F to +250/300F), depending onthe curing system.

Ethylene Propylene, and Ethylene Propylene Diene rubber (EPM, EPDM)

Description: Excellent resistance to water, steam and polar solvents, as well as ozone and sunlight. Also resistant to alcohols, glycol engine coolants and SKY-DROL (phosphate ester hydraulic fluid).Limitations: Avoid non-polar solvents, petroleum oils, and aromatic fuels. Chemistry: Copolymer of ethylene and propylene, or terpolymer with butadiene.Trade Names: NORDEL , EPCAR , VISTALON ASTM D1418 Designation: EPM, EPDMASTM D2000/SAE J200 Type, Class: AA, BA, CA, DATemperature Range: 55 to 150C (67 to 302F)SC-FNGP Color Hardness Tensile Elongation (%) hr C/S Low Temp. High Temp.* EPDM is available in a wide range of Durometers and Colors, as well as many compound variations designed to meet specific applications.

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 200CLow TempHigh TempE1000Black7015.4 (2,230)2601855C (67F)150C (302F)

Silicones are a group of elastomeric materials made from silicone, oxygen, hydrogen, and carbon. Extreme temperature range and low temperature flexibility are characteristics of silicone compounds. As a group, silicones have poor tensile strength, tear resistance, and abrasion resistance. Special compounds have been developed with exceptional heat and compression set resistance. High strength compounds havealso been made, but their strength does not compare to conventional rubber.SILICONE RUBBER

Description: Excellent material for static service at extreme (hot or cold) temperatures. Outstanding flex and fatigue life. Very good for ozone and UV radiation service as well as for resistance to fungal and biological attack.Limitations: Avoid chlorinated solvents, aliphatic and aromatic hydrocarbons and petroleum oils. Silicones are generally very permeable to gases and have poor physical strength and abrasion resistance.Chemistry: Methyl disiloxane, with vinyl and/or phenylgroups.Trade Names: SILASTIC , SILPLUS ASTM D1418 Designation: MQ, PMQ, VMQ, PVMQASTM D2000/SAE J200 Type, Class: FC, FE, GETemperature Range: 115 to 232C (175 to 450F)Typical Uses: LPCVD/Oxidation, Dry Etch, Resist Stripping

* Silicone is available in a wide range of Durometers and ColorsHigh-Temperature Silicone (VMQ)Standard Silicones (VMQ)

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 150CLow TempHigh TempS1000Orange705.5 (815)20017115C (175F)200C (400F)

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 200CLow TempHigh TempS1015Orange686.5 (940)17036 70C (94F)246C (500

FLUOROSILICONE RUBBERDescription: Combines excellent low-temperature performance of silicone with improved chemical resistance. Very good resistance to military and aerospace fuels. Excellent performance in oxygen plasma environments.Limitations: Avoid polar solvents, hydro-carbon fluids and phosphate ester brake fluids. Susceptible to hydrolysis by acids and bases. Limited abrasion resistance.Chemistry: Methyl disiloxane with CF3 groups (Methyl-trifluoropropyl siloxane) (CH 3 )(CH 2 CH 2 CF 3 ) SiO.Trade Names: SILASTIC LS , FSE ASTM D1418 Designation: FVMQASTM D2000/SAE J200 Type, Class: FKTemperature Range: 60 to 180C (76 to 356F)Typical Uses: Dry Etch, Resist Stripping

Compound #ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 200CLow TempHigh TempF1006Blue407.6 (1,100)410 2060C (76F)180C (356F)F1003Blue60F1001Blue707.5 (1,090)2301560C (76F)180C (356F)F1002Blue75F1004Blue806.8 (990)1771160C (76F)180C (356F)

VITON (A) COMPOUNDSDescription: Excellent resistance to petroleum products and solvents. Very good high-temperature performance. Fluorocarbon elastomers make up the most widely used seals in thesemiconductor industry.Limitations: Avoid polar solvents, amines, anhydrous ammonia, SKYDROL, hydrazine and hot acids.Chemistry: Copolymer of vinylidene fluoride and hexafluoropropylene, although many more exotic versions exist for improved chemical resistance or low temperature performance.Trade Names: VITON, FLUOREL , TECHNOFLON , DAI-EL ASTM D1418 Designation: FKM (FPM in Europe)ASTM D2000/SAE J200 Type, Class: HKTemperature Range: 40 to 200C (40 to 392F)Typical Uses: Crystal Growth, Epitaxial Silicon, LPCVD/Oxidation, Coater/Developer, CVD, Dry Etch, Wet Etch, Cleaning, Resist Stripping, Ion Implant, PVD*V1000 is our standard commercial Viton material. *Additional compounds available for specific applications.

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %22Hr C/S @ 200CLow TempHigh TempV1000Black7512.1 (1750)2101025C (13F)200C (392F)

NON-BLACK VITON (A) COMPOUNDSDescription: Specific compounding ingredients can reduce or eliminate the presence of carbon black. These compounds may provide improved resistance to oxidative environments and reactive plasmas. The inorganic pigments are not recommended for use in wet chemical environments as they have been shown to increase the extractable ionic contamination.Chemistry: The base chemistry for these compounds remains relatively unchanged from the carbon-black-filled versions of these fluoroelastomers. Most non-black fluoroelas-tomers are based on a copolymer fluoroelastomer (vinylidene fluoride and hexafluoropropylene).

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 200CLow TempHigh TempV1012White7112.3 (1,780)1751125C (13F)200C (392F)V1003Brown7413.3 (1,930)1801525C (13F)200C (392F)

VITONETP O-RINGS Highly Fluorinated Fluoroelastomers (VITON ETP)Description: Excellent resistance to most chemicals. The performance of these products is greater than traditional fluoroelastomers.Limitations: Contamination performance is somewhat less than AEGIS Perfluoros. Avoid service in strong bases or amines.Chemistry: These compounds may be terpolymers of fully fluorinated monomers, a cure-site monomer or ethylene.Trade Names: CV75, Chemtemp , Hifluor ASTM D1418 Designation: NoneASTM D2000/SAE J200 Type, Class: HKTemperature Range: 20 to 200C ( 4 to 392F)Typical Uses: Wet Etch, Dry Etch, CVD, Resist Stripping, Coater Developer

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 200CLow TempHigh TempV1020Black7817.9 (2,590)1451720C(4F)200C(392F)

VITON(GLT) O-RINGS Description: Excellent resistance to most chemicals. Icreased low temperature performance over Viton (A)

VITON(GFLT) O-RINGS Description: Increased resistance to most chemicals and low temperature performance over Viton (A)

Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 200CLow TempHigh TempContact usBlack7515.0 (2,180)18510-35C (-31F)200C (392F)


VITON(B) O-RINGS Description: Increased fluid resistance over Viton (A)VITON(F) O-RINGS Description: Increased resistance to most chemicals over Viton (A)


Compound# ColorHardness Shore ATensile Mpa (Psi)Elongation %70Hr C/S @ 200CLow TempHigh TempContact usBlack7915.7 (2,270)23029-15C (5F)200C (392F)

Aflas O-RingsDescription: Excellent resistance to acids, bases, water and amines. Widely used in oil fields.Limitations: Avoid polar solvents and aromatic fuels. Compression set performance may be too high for some applications.Chemistry: Copolymer of tetrafluoroethylene and propylene.Trade Names: AFLAS , FLUORAZ Temperature Range: 10 to 200C (14 to 400F)A unique fluoroelastomer based on a copolymer of tetrafluoroethylene (TFE) and propylene (P) was developed by Asahi Glass (Japan) and sold under the AFLAS trade name. TFE/P polymers exhibit improved chemical resistance to base and amine chemical environments compared to traditional FKM polymers.Typical Uses: Oil Fields, Coater/Developer, Resist Stripping, CMP, Cleaningy

ISC CPDColorHardness Shore ATensile PsiElongation %70Hr C/S @ 200CLow TempHigh TempL1000Black821,9901804010C(14F)195C(392F)Commercial grade all purpose Alfas.L1001Black923,3301153310C(14F)235C(437F)High Performance Alfas compound specifically designed for the "down hole" oil drilling industry and used in many other demanding applications.

Industrial Grade Chemraz O-Ring and Seal Compound Listing

Compound DesignatorHardness (Shore A)Compound ColorTemperature Range (F)Tensile Strength (PSI)Modulus @ 50% (PSI)Modulus @ 100% (PSI)Elongation %Compression Set (70 hours at 400F)50575Black-20 to 4251750450115014025A field proven universal compound having a broader range of chemical resistance than any other single compound on the market. Chemraz 505 is the elastomer of choice used to seal better than 90% of the most demanding services found in the chemical process and refining industries.61580Black0 to 6151830360109013516The highest temperature perfluoroelastomer on the market. Chemraz 615 can handle continuous operating temperatures up to 615F with outstanding resistance to fatal thermal related compression set.60580Black0 to 5002150420131013020A high temperature compound with superior physical properties and chemical resistance comparable to Chemraz 505. This compound excels in demanding dynamic applications and exhibits unparalleled performance in high temperature steam and water. Chemraz 605: Recently received USP Class VI Certification

52695Black0 to 500258010030This specialty black compound was formulated for incredible resistance to explosive decompression damage common in high pressure gas services. Chemraz 526 is also used in monomer services where polymerization attacks and ruptures common elastomeric seals.58470Cream-22 to 428130035078014535This specialty cream Chermaz compounds are formulated to withstand the most demanding chemical process applications. Chemraz 584 and 585 are the elastomers of choice for strong oxidation fluids and hot aqueous solutions.

Compound DesignatorHardness (Shore A)Compound ColorTemperature Range (F)Tensile Strength (PSI)Modulus @ 50% (PSI)Modulus @ 100% (PSI)Elongation %Compression Set (70 hours at 400F)

58580Cream-22 to 4281550625124013035This specialty cream Chermaz compounds are formulated to withstand the most demanding chemical process applications. Chemraz 584 and 585 are the elastomers of choice for strong oxidation and hot aqueous fluids.51470White-20 to 425146030068019025The white industrial compounds are for applications where contamination from carbon black must be prevented. Not for use in acids, aldehides, ethylene oxide, or propylene oxide.51780White-20 to 4251600540105016525The white industrial compounds are for applications where contamination from carbon black must be prevented. Not for use in acids, aldehides, ethylene oxide, or propylene oxide.

Compound DesignatorHardness (Shore A)Compound ColorTemperature Range (F)Tensile Strength (PSI)Modulus @ 50% (PSI)Modulus @ 100% (PSI)Elongation %Compression Set (70 hours at 400F)

Kalrez Industrial O-Ring CompoundsKalrez 7075 A new compound with enhanced physical performance properties including very low compression set (15% O-rings per ASTM D 395B) and improved seal force retention. It is a carbon black filled compound utilizing new and proprietary cure chemistry technology with mechanical properties designed for improving sealing performance in both high temperature environments and temperature cycling situations. 7075 joins the family of Kalrez Spectrum products designed for the chemical processing industry. To provide even greater sealing performance in dynamic applications where low friction is required, 7075 O-rings have a glossier finish than other Kalrez parts. 7075 was specifically developed to be used as an O-ring or custom-sealing component in the chemical and hydrocarbon industries, with an improved thermal resistance that extends maximum service temperature to 327C (620F). Kalrez Spectrum 7075 offers the enhanced elastomeric properties outlined above while providing a chemical resistance better than the industry standard set by Kalrez 4079

Kalrez 4079 A low compression set compound for general-purpose use in O-rings, diaphragms, seals, and other parts used in the process and aircraft industries. It is a carbon black-filled compound with excellent chemical resistance, good mechanical properties, and outstanding hot air aging properties. It exhibits low swell in organic an inorganic acids and aldehydes and has good response to temperature cycling effects. A maximum operating temperature of 316C (600F) is recommended, with short excursions to higher temperatures possible. This compound is not recommended for use in hot water/steam applications or in contact with certain hot aliphatic amines, ethylene oxide and propylene oxide. Kalrez 6375 A carbon black-filled compound for general use in O-rings, seals, diaphragms and other specialty parts specifically for the chemical process industry. This compound has excellent, broad chemical resistance, good mechanical properties, and outstanding hot-air aging properties. 6375 is well suited for mixed process streams because of its excellent resistance to acids, bases, and amines. In addition, it is the suggested compound for use in hot water steam, ethylene oxide and propylene oxide. A maximum service temperature of 275C (525F) is recommended.

Kalrez 1050LF A general-purpose compound for O-rings, seals, and other parts used in chemical process industries. It has good hot water/steam, excellent amine resistance, and enhanced compression set properties. Maximum recommended service temperature of 288C (550F). Not recommended for use in organic or inorganic acids at high temperatures. Kalrez 1058 A carbon black-filled compound that has been plasticized with a perfluorinated oil. It is the softest, lowest modulus compound available. Generally, it is similar in chemical resistance to Compound 1050LF; it has an upper service temperature of 260C (500F). Typically used in applications that require how sealing force or high extensibility including liquid chromatography septa, seals/seats for relief valves and tubing. Its shrinkage is greater than other Kalrez compounds; therefore, finished parts may differ from standard specifications. Kalrez 3018 A carbon black-filled compound similar to Compound 1050LF, except for higher hardness/modulus. This compound offers the best hot water/steam resistance and the best high pressure extrusion resistance. Generally used in oil field and process industry applications where these properties coupled with good amine and general chemical resistance are required. A maximum service temperature of 220C (428F) is recommended.

Kalrez 2035 A carbon black-filled compound that is well suited for selected applications in the finishings equipment, pharmaceutical, semiconductor, and chemical transportation markets. Compound 2035 has excellent chemical resistance exhibiting low swell in organic acids, inorganic acids, esters, ketones, and aldehydes. This compound is suggested for use in the ethylene oxide and propylene oxide applications. It also offers good mechanical properties. A maximum service temperature of 220C (428F) is recommended. Kalrez 2037 A non-black-filled compound that is well suited for selected applications in the pharmaceutical, semiconductor, and other markets that demand high purity elastomers. Compound 2037 has excellent chemical resistance exhibiting low swell in organic acids, inorganic acids, esters, ketones, and aldehydes. It also offers good mechanical properties. A maximum service temperature of 218C (425F) is recommended. Miscellaneous Kalrez Properties Many miscellaneous properties are of interest for specific applications. Some of these are unaffected by compound choice, while others vary with hardness or extensibility. As an example, coefficient of friction typically increases as hardness decreases. In general, miscellaneous physical properties are similar to those of Viton fluoroelastomer.

Typical Phisical Properties FOR KALREZ*

Kalrez Compound7075407963751050LF1058301820352037Durometer Hardness, Shore A, points 5 (ASTM D2240)7575758265918579100% Modulus, psi/MPa (ASTM D412, 500 mm/mm (20in/mm))1100/7.61050/7.21050 / 7.21800/12.4675/4.72450/16.91250/8.6900/6.2Tensile Strength at Break, psi/MPa (ASTM D412, 500 mm/mm (20in/mm))2600/17.92450/16.92200/15.12700/18.61300/9.03150/21.72500/17.22450/16.9Elongation at Break, % (ASTM D412, 500 mm/mm (20in/mm)) 160150160125180125150200Compression Set, % at 70 hrs at 204C (400F) (ASTM D395B, pellets)1225303540352527Brittle Point, C / F (ASTM D746)-50 / -58-41/ -42-40 / -40-37 / -35-54 / -65-54 / -65

Simriz O-Rings

Simriz Compound: SZ481 SZ481 is a 70-durometer, black, low-compression set, high-strength perfluoroelastomer. The operating temperature range is from -10C to 230C (-14F to 446F). Typical application environments are aggressive acids, bases and solvents. SZ481 is also suited for many non-oxidizing dry process chemistries. SZ481 can be used in place of Kalrez compound 6375 when temperature are bellow 230C.

Simriz Compound: SZ484 SZ484 is a FDA compliant, 75-durometer, black, low-compression set, high-strength perfluoroelastomer. The operating temperature range is from -10C to 230C (-14F to 446F). Typical application environments are aggressive acids and bases.

Simriz Compound: SZ485 (Standard material for best $ and availability) SZ485 is a 75-durometer, black, low-compression set, high-strength perfluoroelastomer. The operating temperature range is from -10C to 230C (-14F to 446F). Typical application environments are aggressive acids, bases, solvents, and steam. SZ485 is also suited for many non-oxidizing dry process chemistries. SZ485 can be used in place of Kalrez compound 6375 when temperature are bellow 230C.

Simriz Compound: SZ486 SZ486 is A 80 -durometer, white low-compression set, high strength perfluoroelastomer. The operating temperature range is from -10C to 230C (-14F to 446F). Typical application environments for SZ486 seals are aggressive dry process chemistries, including reactive plasmas.

Simriz Compound: SZ487 SZ487 is a 75-durometer, black, high temperature perfluoroelastomer. The operating temperature range is from -10C to 300C (-14F to 572F). Typical application environments are aggressive acids, bases and solvents. SZ487 can be used in place of Kalrez compound 4079. Used in dry, high heat below 300C.

Simriz Compound: SZ488 SZ488 is a 70-durometer, ivory, high temperature perfluoroelastomer. The operating temperature range is from -10C to 300C (-14F to 572F). Typical application environments for SZ488 seals are aggressive dry process chemistries, including reactive plasmas.Simriz Compound: SZ489 SZ489 is a 65-durometer, clear, clean perfluoroelastomer. The operating temperature range is from -10C to 260C (-14F to 500F). Typical application environments forSZ489 seals are aggressive dry process chemistries, including reactive plasmas, as well as aggressive acids, bases and solvents.

PHSYCAL PROPERTIES OF SIMRIZ

Urethane O-Rings

CPD# P1001Urethane O-Ring High Performance Urethane O-Ring for heavy duty applications. 90D material with outstanding wear and tear resistance, very low compression set ensuring maximum service life.Due to exceptional material strenghts, O-Rings do not require Back-Up Rings when operating at high temperatures and / or pressures.Pressure:10000 PSIMax. Temp:230 F

CPD# P1000 Urethane O-Ring High Performance Urethane O-Ring. 70D material with outstanding wear and tear resistance, very low compression set ensuring maximum service life. Due to exceptional material strenghts, O-Rings do not require Back-Up Rings when operating at high temperatures and / or pressures.Pressure:3000 PSIMax. Temp:220 F

MaterialRecomended UseNot Recomended ForMechanical Properties

Buna-N (Nitrile) Standard: 70 Durometer Black Temperature Range: -35F to 250F Least Expensive / Readily AvailableSilicone Greases / Oils Water Petroleum Oils / Fuels Ethylene Glycol Fluids Keytones (MEK) Halogenated Hydrocarbons Auto / Aircraft Brake Fluids Strong Acids Sunlight, Ozone, WeatheringGood Wear Resistance Good Compression Set Resistance Good Short-Term Resilience Good Permeation Resistance

Viton (Fluorocarbon Type A) Standard: 75 Durometer Black Temperature Range: -15F to 400F Vacuum Most Acids / Chemicals Halogenated Hydrocarbons Di-Ester Lubricants Petroleum Oils / Fuels Silicone Oils / Greases Keytones (MEK) Auto / Aircraft Brake Fluids Amines (Ammonia) Acetone, Skydrol, Ethyl Accetate Hot Water and Steam Low Molecular Esters and Ethers Good Wear Resistance Excellent Comp. Set Resistance Moderate Short-Term Resilience Excellent Permeation Resistance

Silicone Standard: 70 Durometer Orange Temperature Range: -65F to 450F Dry Heat Wide Temperature Range Sunlight, Ozone, Weathering Odorless and Non-Toxic Keytones (MEK) Acids Silicone Oils Brake Fluids Poor Wear Resistance Excellent Comp. Set Resistance Poor Short-Term Resilience Excellent Permeation Resistance

EPDM (Ethylene Propylene) Standard: 70 Durometer Black Temperature Range: -60F to 250F Sunlight, Ozone, Weathering Hot Water and Steam Auto / Aircraft Brake Fluids Some Acids ans Bases Keytones ans Alcohols Plumbing Petroleum Oils Fuels Good Wear Resistance Good Comp. Set Resistance Moderate Short-Term Resilience Good Permeation Resistance


Chemraz / Kalrez / Simriz (Perfluoroelastomer) Various Compounds Designed for Specific Applications Temperature Range: -10F to 615F High Temperature Resistance Excellent Chemical Resistance Low Out Gassing Chlorine Wet/Dry Petroleum Oil Chlorinated Hydrocarbons Molten metals Gaseous Alkali Metals Halogenated Freons/Fluids Uranium Hexafluoride Good Wear Resistance Good Comp. Set Resistance Moderate Short-Term Resilience Good Permeation Resistance


Neoprene (Chloroprene) Standard: 70 Durometer Black Temperature Range: -35F to 250F Refrigerants (Freon) Ammonia Some Petrolium Oils Dilute Acids Silicone ester Lubricants Keytones (MEK) Gasoline Auto / Aircraft Brake Fluids Good Wear Resistance Moderate Comp. Set Resistance Moderate Short-Term Resilience Good Permeation Resistance

Urethane Standard: 90 Durometer Translucent Temperature Range: -65F to 200F Drive Belts Some Petroleum Oils Some Hydrocarbon Fuels Oxygen / Ozone Keytones (MEK) Acids Auto / Aircraft Brake Fluids Chlorinated Hydrocarbons Water Excelent Wear Resistance Poor Comp. Set Resistance Excelent Short-Term Resilience


Fluorosilicone Standard: 70 Durometer Blue Temperature Range: -80F to 450F Jet Fuel Dry Heat Wide Temperature Range Some Petroleum Oils Clorinated Solvents Keytones (MEK) Phosphate Esters Some Acids Auto / Aircraft Brake Fluids Amines (Ammonia) Poor Wear Resistance ModerateComp. Set Resistance Moderate Short-Term Resilience Poor Permeation Resistance

Teflon Encapsulated O-Ring Covered with Teflon Tube Usually Silicone or Viton Depends on O-Ring Core Chemical Resistance Heat Resistance Depends on O-Ring Core Good Wear Resistance Good Short-Term Resilience Good Permeation Resistance

Teflon Standard: Non-Elastic White Temperature Range: -250F to 450F Chemical Resistance Fuel Resistance Low Coefficient of Friction Non-Elastic Good Wear Resistance Low Coefficient of Friction


BASIC PROPERTIES FOR ELASTOMERS

Fluid Compatibility by Elastomer

Service Temperatures of Popular Elastomers High Temperature The high-temperature limit is generally considered a 3050% loss of physical properties and typically represents a maximum temperature for 1,000 hours continuous service. It represents an irreversible change in the backbone or cross-link network.The effect of high temperature can be compounded by the interaction with the chemical media. Chemical reactions typically double with a 10C increase in temperature.

Low Temperature The low-temperature limit is generally 15F below TR-10 for static seals. For dynamic seals the TR-10 is more relevant. The TR-10 is the temperature at which an elastomer is able to retract 10%.Low-temperature performance is generally a reversible process.For design purposes compression is generally increased. The chemical media may cause swelling which may act as a plasticizer and lower the service temperature.

Basic O-Ring Materials vs. Common Application Environments

1 = Recommended 2 = Satisfactory 3 = Poor 4 = Marginal 5 = Not RecommendedMaterial (Click the Material for Detailed Specs) Marco Compound NumberBuna-N (NBR)A250-35554422241352542AAB1000VitonD400-15351112121243221AN/AV1000Viton (ETP)F400-5241112211111211N/AN/AV1020SiliconeD400-80451114454555555AN/AS1000EPDM (P.C.)C300-65151122225513551AAE1000EPDM (S.C.)B250-65251122225533551AAE1005KalrezH6000131122211111111N/AN/AK####Simriz (formerly Aegis)G6000131122211111111N/AN/AZ####ChemrazH6150131122211111111N/AN/AC###AflasE437-10241122221523231N/AN/AL1000

1 = Recommended 2 = Satisfactory 3 = Poor 4 = Marginal 5 = Not RecommendedMaterial (Click the Material for Detailed Specs) Marco Compound NumberTeflon (Virgin)D450-250551152211111111N/AN/AT1000FEP (Teflon) Encapsulated O-Rings)E300-10551122211111111N/AN/AT1002PFA (Teflon) Encapsulated Stainless Steel Spring)J500-420551122211111111N/AN/ASpecialFluorosiliconeD350-75551134433133223N/AN/AF1001UrethaneC225-65551141152355551N/AN/AP1001HNBRC325-40552222241555112N/AN/AR1000PolyacrylateC350-20553333154551152N/AN/ASpecialNeopreneC225-40552232252553321N/AN/AN1000ButylC200-65551232124555552N/AN/AY1000HypalonC200-40551232234555522N/AN/AH1000

TEMPERATURE RANGE FOR O-RING

Elastomer Selection Diagram

The six elastomers with superior oil resistance are found in the top half of the diagram. Elastomers used mainly in nonhydrocarbon applications are found in the bottom half of the diagram. Fluoro- carbon and nitrile are repeated because they are also widely used with nonhydrocarbons.

Relative Prices of Popular Elastomers

This chart shows the prices of Parco O-rings made of the most popular compound of each elastomer and is intended to provide a rough estimate of relative price. These prices are based on a comparison of 30 popular sizes of O-rings for each compound.

O-RING LUBRICATION

VARIOUS MANUFACTURERS' REFERENCE NUMBERS The following chart is a general reference to assist in identifying comparable rubber O-Ring compounds between various manufacturers' reference numbers. In most cases, Metro's O-Rings will perform as well or better than the comparable competitors, but the user should verify their suitability for any particular application by checking the Properties Charts and/or testing.

DescriptionBuna-N (Nitrile Rubber)MetroParkerPrecisionNationalParcoAcushnetMinnesotaGeneral Purpose / 40 DurometerBN-40 GPN545-407184B62-402159-40 415HGeneral Purpose / 50 DurometerBN-50 GPN299-507185C24-502159-50 * FDA Listed Formula / 50 DurometerBN-50 FDA 228-50H14439 General Purpose / 60 DurometerBN-60 GPN525-607506C20-602110-60H14136 * FDA Listed Formula / 60 DurometerBN-60 FDAN738-657076D26-60228-60 General Purpose / 70 DurometerBN-70 GPN674-707507B46-704200-70H14327366Y*FDA Listed Formula / 70 DurometerBN-70 FDAN508-757077C22-702068-70H14100 Oil, SAE 120 R1, Class 1, 70 DurometerBN-70 OSN674-707507B46-704200-70H14327 Fuel, SAE 120 R1, Class 2, 70 DurometerBN-70 ACRN497-70 8307C9-70488-70H14126 Used With Plastics / 70 DurometerBN-70 ABS 8187C56-704456-70 General Purpose / 80 DurometerBN-80 GPN368-80 C97-80 High Pressure Sealing / 90 DurometerBN-90 HPN552-907509C90-904177-90H144339

DescriptionEPDM / Ethylene Propylene RubberMetroParkerPrecisionNationalParcoAcushnetMinnesotaGeneral Purpose / 50 DurometerEP-50 GP 5601-50 Low Compression Set / 50 DurometerEP-50 LCSE1100-50 5657-50 General Purpose / 60 DurometerEP-60 GP E66-605601-60E17005560CDLow Compression Set / 60 DurometerEP-60 LCSE529-60 5657-60 General Purpose / 70 Durometer / BlackEP-70 GPE603-703957 5601-70E17016559NLow Compression Set / 70 DurometerEP-70 LCS 3187E50-70 5709-70E17047 *FDA Listed Formula / 70 DurometerEP-70 FDAE1028-703077E14-705601-70E17173 Used With Plastics / 70 DurometerEP-70 ABS General Purpose / 75 Durometer / PurpleEP-75 GPE893-80 E24-705763-70 General Purpose / 80 DurometerEP-80 GP Low Compression Set / 80 DurometerEP-80 LCSE540-803958E59-805611-80E17018560VH

DescriptionSilicone / Dow Corning Raw MaterialsMetroParkerPrecisionNationalParcoAcushnetMinnesotaAMS 3301 / FDA / 40 DurometerSL-40 FDAS1198-4011354S71-401235-40 71104AMS 3302 / FDA / 50 DurometerSL-50 FDAS595-5011355S64-501235-50 71415 AMS 3303 / FDA / 60 DurometerSL-60 FDAS1170-6011356S66-601235-60L1338871416AMS 3304 & 3307 / FDA RED/ 70 DuroSL-70R FDAS604-7011357S59701235-70L1340271417*FDA Listed / White / 70 DurometerSL70W FDAS1138-7011077S93-701552-70L13402 General Purpose / White / 70 DurometerSL-70W GPS821-7011627 1528-70 General Purpose / Yellow / 70 DurometerSL-70Y GPS1199-7011767S98-701535-70L12398 General Purpose / Black / 70 DurometerSL-70B GP S91-701210-70 AMS 3305 / FDA / 80 DurometerSL-80 FDAS614-8011358S69-801235-80L1319971418

DescriptionViton / Dupont Raw MaterialsMetroParkerPrecisionNationalParcoAcushnetMinnesotaGeneral Purpose / Black / 60 DurometerVT-60 GPV769-6019356 9009-60F13601 514SMIL-R-83248/1, AMS 7280, Black/ 75 Duro VT-75 BLV747-7519357V14-759009-75F13664514ADGeneral Purpose / Brown/ 75 DurometerVT-75 BRV884-7516207V35-75 9005-75F13327 General Purpose / Green / 75 DurometerVT-75 GRV1132-7519457V37-759067-75F13325 *FDA Listed Formula / Black / 75 DuroVT-75FDA1 9040-70 *FDA Listed Formula / Brown / 75 DuroVT-75FDA2 MIL-R-83248/2, AMS 7279, Black/90 DuroVT-90GPBLV709-9019359V23-90 9009-90F13681 514JHigh Pressure Sealing / Brown / 90 DuroVT-90GPBRV894-9016209V9-909006-90

O-RING FAILURE ANALYSIS Prevention of seal failures through proper design One major factor in possible seal failure is the extreme and harsh environment in which seals are expected to perform The seal application can provide information about the cause of failure:

O-RING FAILUREFrom the end-users point of view, a seal can fail in three (3) general ways: Leaking Contamination Change in Appearance

O-RING FAILURE

COMMON SEAL FAILURESDescription: Loose particles and scrapes may be found on the seal surface Contributing Factors: Rough sealing surfaces. Excessive temperature. Process environment containing abrasive particles. Dynamic motion. Poor elastomer surface finishSuggested Solutions: Use recommended gland surface finishes. Consider internally lubed Elastomers. Eliminate abrasive components.

COMMON SEAL FAILURESDescription: The seal exhibits a flat-sided cross-section, the flat sides correspoding to the mating seal surfaces. Contributing Factors: Excessive compression. Excessive temperature. Incompletely cured elastomer. Elastomer with high compression set. Excessive volume swell in chemical. Suggested Solutions: Low compression set elastomer. Proper gland design for the specific elastomer. Confirm material compatibility. .

COMMON SEAL FAILURESDescription: The seal may exhibit many signs of degradation including blisters, cracks, voids or discoloration. In some cases, the degradation is observable only by measurement of physical properties. Contributing Factors: Contributing Factors: Incompatibility with the chemical and/or thermal environment. Suggested Solutions: Selection of more chemically resistant elastomer.

COMMON SEAL FAILURESDescription: The seal exhibits blisters, pits or pocks on its surface. Absorption of gas at high pressure and the subsequent rapid decrease in pressure. The absorbed gas blisters and ruptures the elastomer surface as the pressure is rapidly removed. Contributing Factors: Rapid pressure changes. Low-modulus/hardness elastomer. Suggested Solutions: Higher-modulus/hardness elastomer. Slower decompression (release of pressure). .

COMMON SEAL FAILURESDescription: The seal develops ragged edges (generally on the low-pressure side) which appear tattered. Contributing Factors: Excessive clearances. Excessive pressure. Low-modulus/hardness elastomer. Excessive gland fill. Irregular clearance gaps. Sharp gland edges. Improper sizing. Suggested Solutions: Decrease clearances. Higher-modulus/hard-ness elastomer. Proper gland design. Use of polymer backup rings.

COMMON SEAL FAILURESDescription: The seal or parts of the seal may exhibit small cuts, nicks or gashes. Contributing Factors: Sharp edges on glands or components. Improper sizing of elastomer. Low-modulus/hardness elastomer. Elastomer surface contamination. Suggested Solutions: Remove all sharp edges. Proper gland design. Proper elastomer sizing. Higher-modulus/hardness elastomer.

COMMON SEAL FAILURESDescription: This failure is often very difficult to detect from examination of the seal. The seal may exhibit a decrease in cross-sectional size Contributing Factors: Improper or improperly cured elastomer. High vacuum levels. Low hardness/plasticized elastomer. Suggested Solutions: Avoid plasticized elastomers. Ensure all seals are properly post-cured to minimize outgassing.

COMMON SEAL FAILURESDescription: The seal exhibits parallel flat surfaces (corresponding to the contact areas) and may develop circumferential splits within the flattened surfacesContributing Factors: Improper designfailure to account for thermal or chemical volume changes, or excessive compression. . Suggested Solutions: Gland design should take into account material responses to chemical and thermal environments. .

COMMON SEAL FAILURESDescription: The seal often exhibits discoloration, as well as powdered residue on the surface and possible erosion of elastomer in the exposed areas. Contributing Factors: Chemical reactivity of the plasma. Ion bombardment (sputtering). Electron bombardment (heating). Improper gland design. Incompatible seal material. Suggested Solutions: Plasma-compatible elastomer and compound. Minimize exposed area. Examine gland design. . .

COMMON SEAL FAILURESDescription: The seal exhibits cuts or marks which spiral around its circumference . Contributing Factors: Difficult or tight installation (static). Slow reciprocating speed. Low-modulus/hardness Elastomers. Irregular O-ring surface finish (including excessive parting line). Excessive gland width. Irregular or rough gland surface finish. Inadequate lubrication. . Suggested Solutions: Correct installation procedures. Higher-modulus Elastomers. Internally-lubed Elastomers. Proper gland design. Gland surface finish of 816 micro inch RMS. Possible use of polymer backup rings.

COMMON SEAL FAILURESDescription: The seal may exhibit radial cracks located on the highest temperature surfaces. In addition, certain Elastomers may exhibit signs of softeninga shiny surface as a result of excessive temperatures.Contributing Factors: Elastomers thermal properties. Excessive temperature excursions or cycling. Suggested Solutions: Selection of an elastomer with improved thermal stability. Evaluation of the possibility of cooling sealing surfaces.

Standard O-Ring Kit

Standard O-Ring Kit Contents:Total: 30 Sizes 382 Pieces

AS568A-QTYAS568A-QTY006202111000720212100082021310009202141001020215100112021610012202171011013218101111321910112132201011313221101141322210115133257116133267210103277

National O-Ring Sizing Guage The Guage Measures AS568A Standard Sized O-rings:-001 through -050 O-Rings -102 through -178 O-Rings -201 through -279 O-Rings -309 through -382 O-Rings -425 through -455 O-Rings

The cone and tape are sold as a set. The Cone Measures AS568A Standard Sized O-rings:-001 through -041 O-Rings -110 through -151 O-Rings -210 through -235 O-Rings -325 through -337 O-RingsThe Tape Measures AS568A Standard Sized O-rings:-042 through -050 O-Rings -152 through -171 O-Rings -235 through -266 O-Rings -338 through -369 O-Rings -425 through -445 O-Rings

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