ERIKS Sealing Technology - Eriks UK

Materials12 13Elastomers – continuedTFE/P (FEPM)Aflas ® /Viton ® Extreme ®Tetrafluoroethylene and propylene(FEPM) is a copolymer with a fluorinecontent of approximately 54%.FEPM is also ideal for media such asphosphate-esters, mineral oils, siliconeoils, acids and bases, hot water andsteam up to 170°C.Aflas ® is often preferred over FKM insteam and amine applications as it doesnot contain the VF 2monomer, the pointof chemical attack.Viton ® Extreme ® offers superior ketoneresistance than standard FKMs.Perfluoroelastomers(FFKM)Perfluorelastomers (FFKM) have a fullyfluorinated polymer backbone resultingin fluorine content of over 71%. As allof the bonds on the backbone arecarbon-fluorine then FFKM materialsoffer the ultimate thermo-chemicalresistance shown by the goodTypes of perfluoroelastomersCommon FFKM Typeslong-term high temperaturecompression-set resistance. Althoughall FFKM polymer backbones are fullyfluorinated the cross linking systemsused to join the polymer chains togetherdiffer significantly, resulting in differingtemperature and chemical resistance.Peroxide 240°C Broad chemical resistance.Triazinic 327°CModified Triazinic 275°CHigh temperature, excellent mechanicalproperties. Reduced chemical andsteam resistance.Broad chemical resistance, excellentmechanical properties.Polyurethane Rubber(au/EU)Polyurethane is a thermoplastic resinwith elastomeric type properties. Itexhibits outstanding mechanical andphysical properties when compared toother elastomers. It has high resistance(abrasion and tear) and poses thehighest tensile strength available to anyelastomer. Typically Polyurethanes haveworking temperatures of approximately–40°C to +82°C. AU has outstandingresistance to petroleum-based oils andhydrocarbon fuels and EU monomerhas resistance to water, grades beingclassed as hydrolysis resistant or not.Ethylene PropyleneRubber (EPR) andEthylene Propylene DieneMonomer (EPDM)Ethylene Propylene is available as acopolymer (EPR) or as a terpolymer(EPDM). These elastomers haveexcellent resistance to heat, water,steam, weathering and ozone. EthylenePropylene based compounds are notrecommended for use with mineral orpetroleum based fluids.Sulphur cured grades offer a typicaltemperature range of –50°C to +120°Cand optimal mechanical properties.Peroxide-cured grades can reach amaximum temperature of approximately+150°C in hot water, alcohols, organicand inorganic acids and bases.Silicone (VMQ)Silicone elastomers are commonlyused for extreme temperature range(–50°C to +230°C) and offer goodlow temperature flexibility. They alsooffer superior dielectric properties andgood resistance to ultra violet radiation,oxygen and ozone.Silicone is best suited to non-dynamicapplications, as this elastomer typepossess relatively low tear strength andabrasion resistance, although higherstrength grades are available.Silicone compounds are very clean andare used extensively in food and medicalapplications, as they do not impart anytaste or odour. They are also compliantwith engine and transmission oils, animaland vegetable oils/fats and brake fluids.Modified Peroxide 325°CHigh temperature resistance, excellentmechanical properties, reduced amine andbase resistance.Dupont Kalrez ® is also available through ERIKS,subject to regional availability.Hydrocarbon backbone

Materials14 15Selection of Standard ERIKS CompoundsWe have over 130 different compounds for specific applications.Physical Properties of ERIKS CompoundsElastomerCompoundReferenceColour Hardness Temperature ApplicationTechnical Data 36624 47702 55914 55914PC 714177 51414 51414G 514320 514141FFKM-75-162FFKM-75-164Nitrile, NBR,Buna N36624 Black 7047702 Black 90–35 to +110°C–31 to +230°F–25 to +110°C–13 to +230°FStandard compound with good compression-set valuesand medium acrylonitrile content for use with hydraulic oils,vegetable oils, animal fats, acetylene, alcohols, water, air,fuels and many other fluids.Similar to 36624 with higher hardness for higherpressure applications.Colour Black Black Black Black Red BlackHardness (ISO 48Method M) ±5 °IRHDGreen(RAL 6011)70 90 70 70 70 75 75 90 75Black Black Black Black75(Shore A)75(Shore A)Ethylene Propylene,EPDM, EPM55914 Black 7055914PC Black 70–55 to +130°C–67 to +266°F–50 to +150°C–58 to +302°FStandard, sulphur cured EPDM compound with very goodcompression-set for use with solvents, alcohols, ketones,esters, organic and inorganic acids. Not recommended foranimal fats, vegetable or mineral oils.High performance peroxide cured EPDM compoundwith very good compression-set, steam, ozone andweathering resistance.Specific Gravity 1.25 1.25 1.13 1.12 1.25 1.85 2.07 1.87 1.88 – –Minimum operatingtemperature °C–30 –30 –50 –55 –60 –20 –20 –20 –10 – –TR-10 °C –22 –22 –40 –45 –60 –16 –16 –16 –16 – –Silicone, VMQ 714177 Red 7051414 Black 75–55 to +230°C–67 to +446°F–20 to +200°C–4 to +392°FGeneral purpose silicone with excellent physical andtemperature resistance up to 220°C. Extremely high andlow temperature range for use in air, oxygen dry heat,ozone, hot water to 150°C, and glycol based brake fluids.Silicones are recommended only for static applications.General purpose compound with very low compressionsetcharacteristics at high temperatures and chemicalresistance to oils, fats, fuels. Suitable forvacuum applications.Maximum operatingtemperature °C120 120 130 150 220 200 200 200 200 275 310Tensile strength MPa 13 16 10 10 7 13 12 14 19.3 14 13Elongation % 250 150 250 330 300 170 170 120 328 130 137FluorocarbonFKM, Viton ® A51414G Green 75–20 to +200°C–4 to +392°FGeneral purpose compound with very low compression-setcharacteristics at high temperatures and chemical resistanceto oils, fats, fuels. Suitable for vacuum applications.Compression-set (ISO 815 method A)514320 Black 90–20 to +200°C–4 to +392°FSimilar to 51414 with higher hardness for higherpressure applications.Test time (hours) 22 22 22 22 22 24 24 24 22 70 70Viton ® GF 514141 Black 75–10° to +200°C+14°F +392°FOriginal Viton ® GF-Terpolymer with improved steamand temperature resistance.Test temperature °C 100 100 100 150 150 200 200 200 175 200 200Perfluoroelastomer,FFKMFFKM-75-162 Black 75FFKM-75-164 Black 75+275°C+527°F+310°C+590°FBroadest range of chemical and temperature resistancefor chemical processing industry. Suitable for acids,basics, amines, steam, ethylene oxide and manyother aggressive chemicals.High temperature compound with superb compression-setcharacteristics and improved resistance against steam andamines. Very suitable for temperature cycle applications.Result – Slab % 12 13 16 15 20 12 14 14 14 – –Result – O-ring3.53 mm %20 25 26 25 40 18 19 18 – 14.2 22.9Teflex ® FEP/VMQ N/AFEP/FKMN/A–60 to +200°C–76 to +392°F–20 to +200°C–4 to +392°FGeneral purpose encapsulated O-ring, with improvedcompression-set characteristics at low temperatures. Notrecommended for vacuum applications due to high gaspermeability. Not for dynamic applications.High thermal and chemical resistance. Not recommendedfor dynamic applications. Recommended forvacuum applications.Heat Aging (ISO 188)Test time (hours) 70 70 70 70 70 70 70 70 70 – –Test temperature °C 100 100 100 100 100 200 200 200 250 – –PFA/VMQN/A–60 to +260°C–76°F +500°FHigh temperature encapsulated O-ring. Not recommendedfor vacuum applications. Not for dynamic applications.Hardness change °IRHD 6 4 14 12 12 4 5 5 4 – –

18 Materials19ThermoplasticsStandard ERIKS Thermoplastic GradesPolytetrafluoroethylene(PTFE)PTFE is a thermoplastic polymer andnot an elastomer. PTFE is unaffectedFluoroethylene Propylene-Perfluoroalkoxy(FEP/PFA)This polymer is made from chemicallyPolyaryletheretherketone(PEEK)PEEK is a semicrystalline thermoplasticthat is physically strong and highlyMaterialReferenceDescriptionApplicationE400 Virgin Polytetrafluoroethylene (PTFE) Static, Low Duty Cycles.by virtually all known chemicals overa wide range of temperatures. PTFEmodified fluorocarbon copolymers.FEP is often used to encapsulateresistant to wear, hydrolysis and thermaldegradation. PEEK is available asE431Glass and Molybdenum Disulphide reinforced PTFEDynamic/Static, Medium Duty Cycles,Hardened Metal Running Surfaces.lacks elasticity which prevents its useas an elastomeric sealing ring, howeverother elastomers to increase chemicalresistance. FEP/PFA appears morenon-filled (‘Virgin’) grades and variousfilled grades which modify its physicalE471 Graphite reinforced PTFE Dynamic, Medium Duty Cycles.it is commonly used for anti-extrusionas a back-up ring and for non-stickrequirements. Non-filled (‘Virgin’) gradesare stable up to +260°C and quiteflexible and resistant to breaking undertensile and compression stresses. PTFEis available as various filled grades toenhance its physical characteristics.Typical filler types include:n 15-25% glass-filled for improveddeformation and wearn 25% carbon-filled for considerablewear and deformation improvementn 15% graphite-filled to lower thelike a plastic than a rubber; they areextremely resilient and have excellentchemical resistance but they havea lower melting point than PTFE.FEP/PFA has a moderate abrasionresistance but have excellent nonstickcharacteristics. Their temperaturerange is approximately –100°C to+200/250°C for FEP/PFA respectively.FKM cores are typically used forgas applications due to lower gaspermeability, otherwise VMQare typical.characteristics.n Virgin PEEK has excellentmechanical properties at hightemperatures, excellent chemicalresistance, low moisture absorption,good wear and abrasion resistancen Glass-filled grades have increasedcompression strength and shearstrength at higher temperaturesn Carbon-filled grades haveenhanced compressionstrength, tensile strengthand wear-resistanceE462 Carbon/Graphite reinforced PTFE Dynamic, Medium Duty Cycles.E491E282ZV1V2V3V4Ekonol reinforced PTFECarbon/Graphite/PPS reinforced PTFEPEEK 450VirginPEEK 450 CA30Carbon filledPEEK 450 GL30Glass FilledPEEK 450 FC30LubricatedDynamic/Static, Medium to High Duty Cycles,Minimum 45 HRc Running Surface.Dynamic/Static, High Duty Cycles,Hardened Metal Running Surfaces.Back-up RingsDynamic Anti-extrusion Elements/Bearings.BearingsBearingscoefficient of frictionn 40% bronze-filled for excellentwear, deformation strength, thermalconductivity (reduced chemicalresistance)Polymer backbone

20 Materials21Pressure GuidelinesO-ring Pressure CapabilityO-Ring Pressure CapabilitySealing of extreme pressure applicationstypically requires robust high modulus,high hardness materials. On the contraryelastomers, with a reduced hardnessand lower modulus are more compliantand complement lower pressuresealing applications.It is normal practice to specify elastomerswith a high hardness, for high pressureapplications. With the vast array ofelastomeric compounds and formulationsavailable today, it is possible to utilisematerials with a relatively low hardnessand a relatively high modulus.The chart to the right is a simplifiedrepresentation of Nitrile Elastomersunder continuous use at 70°C (158°F).Elevated operating temperaturesconsiderably weaken elastomers;therefore the chart is not applicableto ambient burst tests, or operationat extremes of temperature.Combinations of pressure and clearancethat lie to the right of the pertinent linecould result in extrusion of an O-ring.The addition of an Anti-ExtrusionRing(s) or use of different sealgeometry is advised.Differential Pressure (Bar)40035030025020015010050ElastomerHardness70 °IRHD80 °IRHD90 °IRHD00.05 0.1 0.15 0.2 0.25 0.3Radial Extrusion Gap (mm)Contact ERIKS for assistance in selecting the correct solution for your high pressure application.Rules to Determine ElastomericMaterial Selection90°Low hardness and low modulus,elastomers complement lowerpressure sealing applications.Extreme pressure applicationsrequire materials that are robust, withhigh modulus and high hardness.IHRD80°70°GeneralPurposeExtremePressure60°Very LowPressure50°2 7 12 17Modulus (MPa)

Applications22 23Case StudyCase StudySummarySummaryIndustryMarineIndustryChemicalApplicationFluid Transfer Loading Arm SealsApplicationSolvent Based Cleaning FluidsIssueSolutionIssueSolutionA designer, manufacturer and supplierERIKS Sealing Technology designedERIKS Sealing Technology were alreadyBy working closely with the customer’sof ambient and cryogenic marine loadingand manufactured Viton ® GF V-ringssole suppliers for O-rings used bytechnical and design teams, ERIKS havearms to companies worldwide requiredproviding a commercially viableEurope’s leading innovator, designer andbeen able to design and manufacturelarge cross section elastomer seals abletechnical solution.manufacturer of dispensers worldwide.a commercially and technically suitableto resist a wide variety of chemicals.This material allows the final user totransfer a wide range of fluids fromSubsequently, they were asked tosupply PTFE Spring Energised Lipalternative seal, and exceed thecustomer’s price and application targets.marine tankers, through the loadingSeals, used in the vast majority of thearms, to onshore storage tanks andcustomer’s dispensers.vice versa.The incumbent supplier offered longlead times and promised deliverydates were frequently missed,delaying shipments to the dispensermanufacturer’s own customers.OutcomeOther BenefitsOutcomeOther BenefitsThe customer has been delightedBy providing an improved on-timeERIKS Sealing Technology has delightedERIKS Sealing Technology are able towith ERIKS’ commercial and technicaldelivery performance, the customerthe customer by providing an alternativeprovide local support, via our ERIKSknow-how and support.can now supply complete loadingseal to solve their supply issues with theService Centre.arms and spares more efficiently tocurrent provider.its end customers.ERIKS stock the parts at our UKstores in Dudley, West Midlands,for immediate delivery.

Products24 25O-ringProduct overviewImperial O-ringsBS214NBR70-36624The most common type of static seal is the flexible elastomer O-ring. O-ringsprovide an affordable seal that in most cases are simple to install and subject tocorrect material selection, give acceptable life between maintenance checks.Available in a variety of materials to suit every sealing application, fully mouldedO-rings are manufactured to several international sizes standards, includingBS1806, BS4518, AS568 and ISO 3601. Alternatively non-standard customsizes, up to 2.5m (8ft) diameter can be produced to specific requirements.compound REFERENCE36624hardness70 °IRHD ±5MATERIAl family designatorNBR NitrileO-ring Standard CompoundsElastomerNitrile, NBR,Buna NEthylene Propylene,EPDM, EPMMaterialFamilyDesignatorCompoundReferenceColourHardness°IRHDNBR 36624 Black 70EP 55914 Black 70EP 55914PC Black 70Silicone, VMQ SIL 714177 Red 70FluorocarbonFKM, Viton ® AFPM 51414 Black 75FPM 51414G Green 75Viton ® GF FPM 514141 Black 75Perfluoroelastomer,FFKMFFKMFFKMFFKM-75-162FFKM-75-164Black 75Black 75Temperature–35 to +110°C–31 to +230°F–55 to +130°C–67 to +266°F–50 to +150°C–58 to +302°F–55 to +230°C–67 to +446°F–20 to +200°C–4 to +392°F–20 to +200°C-4 to +392°F–10 to +200°C+14 +392°F+275°C+527°F+310°C+590°FO-rings are available in the compounds detailed in the table on pages 14-15.ApplicationStandard compound with good compression-set valuesand medium acrylonitrile content for use with hydraulicoils, vegetable oils, animal fats, acetylene, alcohols, water,air, fuels and many other fluids.Standard, sulphur cured EPDM compound with very goodcompression-set for use with solvents, alcohols, ketones,esters, organic and inorganic acids. Not recommended foranimal fats, vegetable or mineral oils.High performance peroxide cured EPDM compoundwith very good compression-set, steam, ozone andweathering resistance.General purpose silicone with excellent physical andtemperature resistance up to 220°C. Extremely high andlow temperature range for use in air, oxygen dry heat,ozone, hot water to 150°C, and glycol based brake fluids.Silicones are recommended only for static applications.General purpose compound with very low compressionsetcharacteristics at high temperatures andchemical resistance to oils, fats, fuels.Suitable for vacuum applications.General purpose compound with very low compressionsetcharacteristics at high temperatures andchemical resistance to oils, fats, fuels.Suitable for vacuum applications.Original Viton ® GF-Terpolymer with improved steam andtemperature resistance.Broadest range of chemical and temperature resistancefor chemical processing industry. Suitable for acids,basics, amines, steam, ethylene oxide and many otheraggressive chemicals.High temperature compound with superb compression-setcharacteristics and improved resistance against steam andamines. Very suitable for temperature cycle applications.O-rings are supplied to ISO3601-1 class 2 tolerances unless otherwise specified.Metric O-rings139.3x5.7FPM75O-rings are supplied to ISO3601-1 class 2 tolerances unless otherwise specified.-51414*O-ring and hardware dimensional details are available at:http://oring-groove-wizard.eriks.co.uk/DiameterGrooves.aspxdash size REFERENCE*214typeBS1806, AS-568, ISO3601-1compound REFERENCE51414 Viton ®hardness75 °IRHD ±5MATERIAl family designatorFPM Viton ®nominal cross section5.70 mmnominal inner diameter139.30 mm

Products26 27Vulc-O-ringProduct overviewERIKS has developed a very successful method of producing O-rings fromextruded cord to a very high technical standard.The main benefits of Vulc-O-rings are:n Moulds are not required resulting in cost savingsn No upper diameter restrictions such as mouldingn No flash lines are presentn Can be used in standard housingsn Short lead timesMetric Vulc-O-rings1999.35 x 5.7 FPM 75 514206 - vulccompound REFERENCE514206Teflex ® O-ringProduct overviewTeflex ® seals provided designers and engineers with a seal that combined the chemicalresistance of PTFE with the resilience of rubber.Encapsulated seals are available with two types of jacket - FEP and PFA.The energising core is available in Viton ® or Silicone. For lowtemperature applications, or where lower closure forces arerequired, either a solid silicone or hollow silicone core is specified.Teflex ® O-ringsBS214FEP/SILmaterial family designatorFEP Encapsulated SiliconeDASh reference*214Hardness75 °IRHDMetric Teflex ®typeBS1806, AS-568, ISO3601-1MATERIAl family designatorFPM Viton ®18x3PFA/SILnominal cross section5.70 mmMATERIAl family designatorPFA Encapsulated Siliconenominal inner diameter1999.35 mmnominal cross section3.00 mmVulc-O-ring MaterialsElastomerMaterial FamilyDesignatorCompoundReferenceColourHardness °IRHDNitrile (NBR) NBR 366185 Black 75Fluorocarbon (FKM) A Type FPM 514206 Black 75Fluorocarbon (FKM) GF Type FPM 514141 Black 75Silicone (VMQ) SIL 714206 Red 75Ethylene Propylene Diene Monomer EPDM 559303 Black 75Teflex ® O-ring MaterialsCompoundReferenceFEP/VMQFEP/FKMPFA/VMQnominal inner diameter18.00 mmTemperature Range Application Material Family Designator–60 to +200°C–20 to +200°C–60 to +260°CGeneral purpose encapsulated O-ring, with improved compression-setcharacteristics at low temperatures. Not recommended for vacuumapplications due to high gas permeability. Not for dynamic applications.High thermal and chemical resistance. Not recommended for dynamicapplications. Recommended for vacuum applications.High temperature encapsulated O-ring. Not recommended for vacuumapplications. Not for dynamic applications.FEP/SILFEP/FPMPFA/SIL*O-ring and hardware dimensional details are available at:http://oring-groove-wizard.eriks.co.uk/DiameterGrooves.aspx

28 Products29X-ringProduct overviewX-rings can be used in a wide variety of static and dynamic sealing applications.They are available in standard O-ring sizes.Their four-lobed design provides a larger sealing area in comparison to a standardO-ring. The double seal action requires lower squeeze levels to maintain aneffective seal, thus reducing friction level and improving seal life.X-ring parting lines are between the lobes, away from the sealing surface,therefore eliminating the problems of leakage often resulting from a parting linesirregular surface as found on an O-ring.X-rings are designed to out perform a standard O-ring in rotary seal applications.The four lobed configuration creates a more stable seal avoiding spiral twistingwhich can occur in reciprocating applications.X-ring MaterialsElastomerMaterial FamilyDesignatorCompoundReferenceHardness°IRHDTemperatureRange (°C)Nitrile (NBR) NBR 36624 70 –35 to +110Viton ® (FKM) FPM 51414 75 –20 to +200ApplicationExcellent resistance to aliphatic hydrocarbons,mineral oils, greases, vegetable and animal oils/greases, heating oil and diesel fuel.Resistant to mineral oils and greases,aliphatic, aromatic and also special chlorinatedhydrocarbons, petrol, diesel fuels, siliconeoils and greases. Suitable for high vacuumapplications.X-RingsQ4210 NBR 70 - 36624Metric X-RingsQ4 139.3 x 5.7 FPM 75 51414compound REFERENCE36624compound REFERENCE51414hardness70 °IRHDhardness75 °IRHDMATERIAl family designatorNBR NitrileMATERIAl family designatorFPM Viton ®DASh size REFERENCE210cross section5.7 mmx-ring designatorINNER diameter139.3 mmx-ring designator

30 Products31Back-up Rings (Anti-extrusion Ring)Product overviewT1Spiral TurnAnti-Extrusion RingT2Scarf CutAnti-Extrusion RingT3Solid Anti-ExtrusionRingT4Scarf Cut ConcavedAnti-Extrusion RingT5Solid ConcavedAnti-Extrusion RingBack-up rings are used to extend the operating pressure of an O-ring. Either oneor two back-up rings are co-located within a groove of increased width, on thelow-pressure side of the seal. When pressure is applied to the sealing systemthe back-up ring is axially compressed, increasing its radial width to close theextrusion gap. The high shear strength of the back-up ring material is then able tocontain the elevated pressures.SingleUnlike elastomers, which see visco-elastic extrusion, thermoplastic back-up ringmaterials fail if the maximum shear stress is greater than the shear strength of thematerial at the operating temperature.T1DoubleThe graphs and instructions on the following pages can be used to select thecorrect material.Back-upring typePTFE Back-up Rings00 - 210 BUSPBack-up Type DesignatorBack-up type designatorSpiral Virgin PTFEDASh size reference210BACK up ring typeBS1806ISO 3601 Back-up Ring MaterialISO3601 Back-up RingsSpiral Scarf cut Solid Scarf cut SolidISO3601-4 - T1 - 699 - PD - 20000 - 21180 - A1Material familyDESIGNATorA1Housing diameter211.80 mmDriving Diameter200.00 mmApplICATIon TypePD – Piston DynamicRD – Rod DynamicPS – Piston StaticRS – Rod StaticDesignatorBUSPBUCUBUENTypeSpiral Back-upScarf Cut Back-upSolid Back-upMaterial Family DesignatorDescriptionNote: Back-up rings are groove specific, the above part numbering format being only suitable for BS1806 grooves.Hardware dimensional details are available at: http://oring-groove-wizard.eriks.co.uk/DiameterGrooves.aspxA1V1Virgin Polytetrafluoroethylene (PTFE)Virgin PEEKO-ringcross section6.99 mmBack up styleT1Back up ringISO3601-4

32 Products33Back-up Ring MaterialSelection ProcessBack-up Ring for 000/100/200 seriesMaterial Shear Strength Vs TemperatureThe graphs and instructions on these pages can be used toselect the correct material.Step 1:Select the correct shear stress 3D plot for your O-ring crosssection.Plot the system’s maximum diametral clearance anddifferential pressure then read off the appropriate shear stress.Step 2:Apply an appropriate safety factor to this value (Minimum 2).Shear Stress (MPa)60.0050.0040.0030.0020.00Shear Stress plotted against Clearance Gap/Pressure(Back-up Ring for 000/100/200 Series O-rings)90.080.070.0Material TypeVirgin PTFEGlass/Moly FilledPTFEVirgin PEEKStep 3:10.00Select a material from the ‘Material Shear Strengths’ chart wherethe Shear Strength of the material is greater than the valuecalculated at Step 2, at the application operating temperature.Back-up Ring for 300 series0.000.020.040.060.080.0100.0Differential Pressure (MPa)120.0140.0Back-up Ring for 400 series0.00 mm gap0.05 mm gap0.10 mm gap0.15 mm gap0.20 mm gap0.25 mm gapDiametral Clearance (E Gap x2)Shear Strength (MPa)60.050.040.045.0040.0035.00Shear Stress plotted against Clearance Gap/Pressure(Back-up Ring for 300 Series O-rings)60.0050.00Shear Stress plotted against Clearance Gap/Pressure(Back-up Ring for 400 Series O-rings)30.0Shear Stress (MPa)30.0025.0020.0015.00Shear Stress (MPa)40.0030.0020.0020.010.005.0010.0010.00.000.000.020.040.060.080.0100.0Differential Pressure (MPa)120.0140.00.00 mm gap0.05 mm gap0.10 mm gap0.15 mm gap0.20 mm gap0.25 mm gapDiametral Clearance (E Gap x2)0.020.040.060.080.0100.0Differential Pressure (MPa)120.0140.00.00 mm gap0.05 mm gap0.10 mm gap0.15 mm gap0.20 mm gap0.25 mm gapDiametral Clearance (E Gap x2)0.025 40 70 100 150 200 260Temperature (°C)

34 Products35Single Acting Cap SealEnergiser MaterialsProduct overviewElastomerCompoundReferenceColourHardness°IRHDTemperatureApplicationA self-actuating, pressure venting, extrusion resistant seal that combines lowbreakout and running friction with minimal leakage. The seal is constructed of apremium grade PTFE sealing element and an elastomer energiser.The Single Acting Cap Seal is a reliable, compact, design with a long service lifeand is available in both rod and piston type geometries toretro-fit into ISO7425-2. Stick-slip is eliminated even afterlong periods of inactivity whether in a lubricated or nonlubricatedenvironment, giving low breakout friction.Nitrile, NBR,Buna NEthylenePropylene,EPDM, EPMSilicone,VMQ36624 Black 7055914 Black 7055914PC Black 70714177 Red 70–35 to +110°C–31 to +230°F–55 to +130°C–67 to +266°F–50 to +150°C–58 to +302°F–55 to +230°C–67 to +446°FStandard compound with good compression-set values and mediumacrylonitrile content for use with hydraulic oils, vegetable oils, animal fats,acetylene, alcohols, water, air, fuels and many other fluids.Standard, sulphur cured EPDM compound with very good compressionsetfor use with solvents, alcohols, ketones, esters, organic and inorganicacids. Not recommended for animal fats, vegetable or mineral oils.High performance peroxide cured EPDM compound with very goodcompression-set, steam, ozone and weathering resistance.General purpose silicone with excellent physical and temperatureresistance up to 220°C. Extremely high and low temperature range foruse in air, oxygen dry heat, ozone, hot water to 150°C, and glycol basedbrake fluids. Silicones are recommended only for static applications.C** - 15000 - D - 36624 - E471 - PWIptfe grade codeE471 Graphite Filled PTFEFluorocarbonFKM,Viton ® A51414 Black 7551414G Green 75–20 to +200°C–4 to +392°F–20 to +200°C–4 to +392°FGeneral purpose compound with very low compression-setcharacteristics at high temperatures and chemical resistance to oils,fats, fuels. Suitable for vacuum applications.General purpose compound with very low compression-setcharacteristics at high temperatures and chemical resistance to oils,fats, fuels. Suitable for vacuum applications.ElASToMERIC energisercompound reference36624 Nitrile NBR 70 °IRHDViton ® GF 514141 Black 75–10 to +200°C+14 to +392°FOriginal Viton ® GF-Terpolymer with improved steam andtemperature resistance.Standard Radial SectionsRadial SectionCoderadial section codeA = 1.78B = 2.62C = 3.53D = 5.33E = 6.99bore/rod diameter150.00 mmTypeSP – Piston Type Single ActingDP – Piston Type Double ActingSR – Rod Type Single ActingDR – Rod Type Double ActingStandard Bore Diameter (mm) Piston Groove Diameter (mm) Rod Groove Diameter (mm) Groove Width (mm)A 8 – 16.9 –4.9 +4.9 2.20B 17 – 26.9 –7.3 +7.3 3.20C 27 – 59.9 –10.7 +10.7 4.20D 60 – 199.9 –15.1 +15.1 6.30E 200 – 255.9 –20.5 +20.5 8.10PTFE GradesMaterialReferenceDescription Wear Factor (K) ApplicationE400 Virgin Polytetrafluoroethylene (PTFE) 1500 Static, Low Duty Cycles.E431Glass and Molybdenum Disulphidereinforced PTFE15Dynamic/Static, Medium Duty Cycles, Hardened MetalRunning Surfaces.E471 Graphite reinforced PTFE 10 Dynamic, Medium Duty Cycles.E462 Carbon/Graphite reinforced PTFE 15 Dynamic, Medium Duty Cycles.E491 Ekonol reinforced PTFE 2E282Z Carbon/Graphite/PPS reinforced PTFE 1Dynamic/Static, Medium to High Duty Cycles, Minimum 45 HRcRunning Surface.Dynamic/Static, High Duty Cycles, Hardened MetalRunning Surfaces.

36 Products37Double Acting Cap SealEnergiser MaterialsProduct overviewElastomerCompoundReferenceColourHardness°IRHDTemperatureApplicationA self-actuating, bi-directional, extrusion resistant seal that combines low breakoutand running friction with minimal leakage. The seal is constructed of a premiumgrade PTFE sealing element and an elastomer energiser.The Double Acting Cap Seal is a reliable, compact design with a long service lifeand is available in both rod and piston type geometries toretro-fit into ISO7425-2. Stick-slip is eliminated even afterlong periods of inactivity whether in a lubricated or nonlubricatedenvironment, giving low breakout friction.Nitrile, NBR,Buna NEthylenePropylene,EPDM, EPMSilicone,VMQ36624 Black 7055914 Black 7055914PC Black 70714177 Red 70–35 to +110°C–31 to +230°F–55 to +130°C–67 to +266°F–50 to +150°C–58 to +302°F–55 to +230°C–67 to +446°FStandard compound with good compression-set values and mediumacrylonitrile content for use with hydraulic oils, vegetable oils, animal fats,acetylene, alcohols, water, air, fuels and many other fluids.Standard, sulphur cured EPDM compound with very good compressionsetfor use with solvents, alcohols, ketones, esters, organic and inorganicacids. Not recommended for animal fats, vegetable or mineral oils.High performance peroxide cured EPDM compound with very goodcompression-set, steam, ozone and weathering resistance.General purpose silicone with excellent physical and temperatureresistance up to 220°C. Extremely high and low temperature range foruse in air, oxygen dry heat, ozone, hot water to 150°C, and glycol basedbrake fluids. Silicones are recommended only for static applications.C** - 15000 - D - 36624 - E471 - PWIptfe grade codeE471 Graphite Filled PTFEElASToMERIC energisercompound reference36624 Nitrile NBR 70 °IRHDFluorocarbonFKM,Viton ® A51414 Black 7551414G Green 75Viton ® GF 514141 Black 75–20 to +200°C–4 to +392°F–20 to +200°C–4 to +392°F–10 to +200°C+14 to +392°FGeneral purpose compound with very low compression-setcharacteristics at high temperatures and chemical resistance to oils,fats, fuels. Suitable for vacuum applications.General purpose compound with very low compression-setcharacteristics at high temperatures and chemical resistance to oils,fats, fuels. Suitable for vacuum applications.Original Viton ® GF-Terpolymer with improved steam andtemperature resistance.radial section codeA = 1.78B = 2.62C = 3.53D = 5.33E = 6.99PTFE Gradesbore/rod diameter150.00 mmMaterialReferenceDescription Wear Factor (K) ApplicationStandard Radial SectionsTypeSP – Piston Type Single ActingDP – Piston Type Double ActingSR – Rod Type Single ActingDR – Rod Type Double ActingE400 Virgin Polytetrafluoroethylene (PTFE) 1500 Static, Low Duty Cycles.E431Glass and Molybdenum Disulphidereinforced PTFE15Dynamic/Static, Medium Duty Cycles, Hardened MetalRunning Surfaces.E471 Graphite reinforced PTFE 10 Dynamic, Medium Duty Cycles.Radial SectionCodeStandard Bore Diameter (mm) Piston Groove Diameter (mm) Rod Groove Diameter (mm) Groove Width (mm)A 8 – 16.9 –4.9 +4.9 2.20B 17 – 26.9 –7.3 +7.3 3.20C 27 – 59.9 –10.7 +10.7 4.20D 60 – 199.9 –15.1 +15.1 6.30E 200 – 255.9 –20.5 +20.5 8.10E462 Carbon/Graphite reinforced PTFE 15 Dynamic, Medium Duty Cycles.E491 Ekonol reinforced PTFE 2E282Z Carbon/Graphite/PPS reinforced PTFE 1Dynamic/Static, Medium to High Duty Cycles, Minimum 45 HRcRunning Surface.Dynamic/Static, High Duty Cycles, Hardened MetalRunning Surfaces.

38 Products39Capped O-ringEnergiser MaterialsProduct overviewElastomerCompoundReferenceColourHardness°IRHDTemperatureApplicationCapped O-rings are a cost-effective solution for providing cap seals for rod andpiston seal applications. The seal assembly consists of a cap manufactured fromone of Eriks premier PTFE compounds and an O-ring to act as the seal energiser.The design of the capped O-ring protects the elastomer from extrusion andnibbling. The specially profiled cap element acts as the seal’s dynamic interfaceand prevents spiral failure and reduces stick slip, commonly associated withO-ring seals.Our capped O-rings are designed to retrofit existing O-ring grooves, includingAS4716 standard housing dimensions. Both metric andimperial sizes are available and can be tailored to fit housingdimensions provided. Our technical team can also advise onhow to optimise O-ring squeeze to minimise seal friction.COP - 10000 - C - 36624 - E491 - PWINitrile, NBR,Buna NEthylenePropylene,EPDM, EPMSilicone,VMQFluorocarbonFKM,Viton ® A36624 Black 7055914 Black 7055914PC Black 70714177 Red 7051414 Black 7551414G Green 75Viton ® GF 514141 Black 75–35 to +110°C–31 to +230°F–55 to +130°C–67 to +266°F–50 to +150°C–58 to +302°F–55 to +230°C–67 to +446°F–20 to +200°C–4 to +392°F–20 to +200°C–4 to +392°F–10 to +200°C+14 to +392°FStandard compound with good compression-set values and mediumacrylonitrile content for use with hydraulic oils, vegetable oils, animal fats,acetylene, alcohols, water, air, fuels and many other fluids.Standard, sulphur cured EPDM compound with very good compressionsetfor use with solvents, alcohols, ketones, esters, organic and inorganicacids. Not recommended for animal fats, vegetable or mineral oils.High performance peroxide cured EPDM compound with very goodcompression-set, steam, ozone and weathering resistance.General purpose silicone with excellent physical and temperatureresistance up to 220°C. Extremely high and low temperature range foruse in air, oxygen dry heat, ozone, hot water to 150°C, and glycol basedbrake fluids. Silicones are recommended only for static applications.General purpose compound with very low compression-setcharacteristics at high temperatures and chemical resistance to oils,fats, fuels. Suitable for vacuum applications.General purpose compound with very low compression-setcharacteristics at high temperatures and chemical resistance to oils,fats, fuels. Suitable for vacuum applications.Original Viton ® GF-Terpolymer with improved steam andtemperature resistance.ptfe grade codeE491 Ekonol Filled PTFEElASToMERIC energisercompound reference36624 Nitrile NBR 70 °IRHDPTFE Gradesradial section codeA = 1.78B = 2.62C = 3.53D = 5.33E = 6.99bore/rod diameter150.00 mmMaterialReferenceDescription Wear Factor (K) ApplicationE400 Virgin Polytetrafluoroethylene (PTFE) 1500 Static, Low Duty Cycles.E431Glass and Molybdenum Disulphidereinforced PTFE15Dynamic/Static, Medium Duty Cycles, Hardened MetalRunning Surfaces.E471 Graphite reinforced PTFE 10 Dynamic, Medium Duty Cycles.TYPECOP = PistonCOR = RodE462 Carbon/Graphite reinforced PTFE 15 Dynamic, Medium Duty Cycles.E491 Ekonol reinforced PTFE 2Dynamic/Static, Medium to High Duty Cycles, Minimum 45 HRcRunning Surface.E282Z Carbon/Graphite/PPS reinforced PTFE 1Dynamic/Static, High Duty Cycles, Hardened MetalRunning Surfaces.

40 Products41Spring Energised SealProduct overviewThe Spring Energised (SE) seal pressure activated seal, with assisted energisationprovided by corrosion-resistant metal spring. When the seal is in situ, the springis under compression and applies force to seal’s sealing lips. This creates a tightbarrier to prevent gas or fluids from leaking.The spring also provides resiliency to compensate for seal wear, glandmisalignment or eccentricity. While spring force provides adequate force forsealing at low pressure, at high pressure the system pressure augments the springforce to provide an even tighter seal. SE seals are precision machined from PTFE,filled PTFE and other high performance polymers. SE seals work consistentlyunder a wide array of temperatures and pressures. Eriks offers over 100 jacketmaterials, 8 spring materials, and 5 spring designs to meet your sealing needs.E - V - 1 - A - 1 - M - 136- E431MATERIAl codeE431dash numberAS4716 Referencespring loadL – LightM – MediumH – HardSPRING material301 Stainless SteelSpring DesignationSpring Type Material Code Material Description1 301 Stainless Steel6 316 Stainless SteelCantileverH Hastelloy ® C-276lIP ConfiguRATIonRod and PISTon Seals:A – StandardB – I.D. ScraperC – O.D. ScraperD – Double ScraperFACE Seals:A – StandardSpiral PitchHelicalE Elgiloy ®2 302 Stainless Steel6 316 Stainless SteelH Hastelloy ® C-2762 302 Stainless SteelH Hastelloy ® C-276Seal typeRod and PISTon Seals:1– Standard heel rod seal2 – Standard heel piston seal3 – Standard heel rod seal4 – Extended heel piston sealFACE Seals:5 – Internal face seal6 – External face sealPTFE GradesMaterialReferenceDescription Wear Factor (K) ApplicationSPRING TypeV – CantileverS – Spiral pitchH – HelicalE400 Virgin Polytetrafluoroethylene (PTFE) 1500 Static, Low Duty Cycles.E431Glass and Molybdenum Disulphidereinforced PTFE15Dynamic/Static, Medium Duty Cycles, Hardened MetalRunning Surfaces.PRoduct lINEEE471 Graphite reinforced PTFE 10 Dynamic, Medium Duty Cycles.E462 Carbon/Graphite reinforced PTFE 15 Dynamic, Medium Duty Cycles.E491 Ekonol reinforced PTFE 2E282Z Carbon/Graphite/PPS reinforced PTFE 1Dynamic/Static, Medium to High Duty Cycles, Minimum 45 HRcRunning Surface.Dynamic/Static, High Duty Cycles, Hardened MetalRunning Surfaces.

42 43Other products used in the chemical process industry from ERIKSMechanical SealsERIKS Sealing Technology’s range of mechanical seals manufactured under the Pioneer Weston name has anenviable reputation for supplying mechanical seals to many major OEMs and specifiers for over 50 years.Mechanical Seal ProductsMechanical Seal Repair and RemanufactureComponent SealsCartridge SealsSave on the cost of a new mechanicalWhat does ERIKS do with your seal?Our extensive range of component sealsis specifically designed to meet theexacting requirements of pump repairersand Original Equipment Manufacturers.The range encompasses designs thatinterchange directly with the majority ofmajor branded products. These sealsare manufactured in a quality controlledenvironment to the very higheststandards. Our products are availablewith a wide choice of face and staticsealing element materials to withstandeven the harshest of chemicals.Cartridge seals are specifically designedto meet the demands of high-end MRO(Maintenance, Repair and Overhaul)applications where minimising downtimeis a priority. These seals are typicallyfound in agitators and reactor vessels.These seals are delivered pre-assembledand to replace a seal, the engineerneeds only to unbolt and remove thefailed unit and then shaft and bolt up thenew seal unit. To overcome applicationproblems these seals are available withdifferent combinations of flush. Quenchand drain porting can be used to keepthe faces cool, clear of debris and toprevent dry running.Bespoke Mechanical SealsTo complement the standard rangeERIKS can work with you on yourapplication to design and manufacture abespoke seal for your more arduous orabrasive applications.seal by opting to have your existingunit re-manufactured by ERIKS. Yourseal is returned to an ‘as new’ conditionwith the same performance and lifeand often in a shorter time scale than areplacement unit.Our technicians and specialists repairand modify all leading brands as wellas bespoke or custom seals and areexpert in returning them to the higheststandards, quickly and professionallyusing original or special designcomponents where required. To date, wehave re-engineered more than 10,000custom mechanical seals to provideincreased life and performance.It’s a simple service; send your sealto our Warrington facility marked forn Completely disassemble the sealn Clean all parts ultrasonically,waterblast with micro granulesand inspect for damagen Polish and lap the recoverablesealing facesn During and after the lapping weinspect the flatness of the sealfaces with monochromatic light toone light bandn Replace elastomers and otherparts that no longer meet thespecificationn Reassemble and pressure testyour mechanical sealn Protectively package and dispatchback to youREPAIR and we’ll do the rest.

44 Other products used in the chemical process industry from ERIKS45Typical Seal Applicationsfor ValvesV-PackingV-packingIf seal redundancy is required, the multi-lip V-packing assembly is the seal of choice.Configurations of PTFE, Thermoplastic and Elastomer can be combined to providesealing solutions across a broad range of parameters.V-packing assemblies are available in both uni-directional and bi-directional designs.A typical uni-directional V-packing assembly consists of a header (primary) seal,V-rings (secondary seals) and an end adaptor. The number of V-rings can be tailoredto meet the specific redundancy needs. To aid installation V-packing seal assembliesneed to be installed in open glands.High differential pressures can be tolerated, as the multi-lip redundancy canoffer a suitable solution for low fugitive emission requirements. Each sealing lipis mechanically energised by the prior sealing element and provides support, thusincreasing the seal assembly resistance to extrusion.The practice of multi-lip redundancy optimises sealing integrity across the completeseal assembly and maximises sealing efficiency for ultimate leakage control. ERIKSV-packing assemblies are tailored to meet specific application environments. Pleasecontact ERIKS UK with your application details or for further information.Metal O-rings and C-ringsMetal seals are used at the extremes of temperature and pressure. Used statically,against fine surface finishes they are available in a range of base materials andcoatings to suit media and mating surface conditions. Metal seals are both resilientand may be pressure energised, making them extremely reliable. For further detailsconsult www.o-ring.info/en/technical-info/technical-handbookO-Rings andValve Seats

46 Other products used in the chemical process industry from ERIKS47Rubber Moulded and Extruded ProductsGasketsRubber MouldingsThe moulding of rubber and elastomericcompounds is accomplished by forcingthe material into a shape using heat andpressure. Rubber and elastomers canbe moulded by compression, transferand injection methods. The volume ofparts and type of compound requiredwill determine the moulding methodused. Our engineers participate withyou to develop innovative solutions foryour production.Extruded Rubber Profiles/InflatablesOur comprehensive product rangeincorporates not only rubber, but alsoThermo Plastic Elastomer (TPE). OurTPE solutions are a prime example ofour innovative thinking, combining twoor three thermo plastic elastomers inone product to reduce the steps in themanufacturing process.Our in-house CAD/CAM capabilityalso enables us to quickly design andaccurately manufacture innovativesolutions to meet new applications andoperating conditions.ERIKS’ product knowledge ensures youalways get the right gasket for the job,however large or small your needs. Ourgasket installation kits for example, havethe seals and gaskets logically packedfor ease of assembly, to save you time.We design, manufacture and supplya wide range of essential sealingand insulation components to manyindustries where equipment failure is notan option. Products include cut gaskets,packings, sheet jointing materials,moulded seals and shaped thermalinsulation components, all vital to amodern industrial society.ERIKS ensure that white goodsmanufacturers, petrochemical andchemical plants, power stations,utility suppliers, hospitals, thefunction effectively by supplying only thebest materials available on the market.By closely working with leading materialmanufacturers such as Novus, we canprovide an extensive range of qualityproducts at cost-effective prices. Bydoing this, we are able to provide anextensive range of seals, gaskets andinsulation components, available in awide range of exceptional materialsto suit every demanding application.A summary of our product range is givenbelow. Our highly qualified sales teamwill be delighted to provide detailed,technical advice as to performance andsuitability for specific situations.Cut gaskets and sheet jointing availablefrom every imaginable sealing material,including specialised materials suchIn addition we offer:n Spiral Wound Gasketsn Valve and Pump Gland Packingsn Ring Type Joints andKammprofilesn Extrusionsn O-rings and Bonded Sealsn Rubber Mouldings Rubber ProofWoven Clothsn Dry and Coated Woven Clothsn Boiler House Productsn Thermal Insulation Fabricationsn Multi-ply Expansion Jointsand Stripn Boiler CombustionChamber Insulationn Boiler/Cooker Case Insulationautomotive industry, pipeline and boileras Flexitallic Sigma andmanufacturers and other key industriesThermiculite ranges.

ERIKS Sealing TechnologyERIKS Sealing Technology offers a comprehensive range of high performance sealingproducts, supported by a world-class technical and logistical service to deliver the rightseal on time to your critical applications.ERIKS Sealing TechnologyUnit 5, Yorks ParkBlowers Green RoadDudleyWest MidlandsDY2 8ULTel 0845 603 1221Fax 0845 603 1441www.eriks.co.ukERIKS Sealing Technology206 Cavendish PlaceBirchwood ParkWarringtonCheshireWA3 6WUTel 01925 853000Fax 01925 853030UNREGISTERED