ERIKS nv - O-ring Technical Handbook

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Sealing ElementsTechnical Handbook O-rings21. GlossaryTorrComes from the tube of Torricelli. The unit of pressure used in vacuum measurement. It is equal to 1/760 of a standard atmosphere,and for all practical purposes is equivalent to one millimeter of mercury (mm HG).TrimThe process involving removal of mold flash.Trim CutDamage to mold skin or finish by too close trimming.TR-10The warming up temperature at which a frozen O-ring regains 10% of its elasticity.Under-CureDegree of cure less than optimum. May be evidenced by inferior physical properties.VacuumSituation in a given space that is occupied by a gas at less than atmospheric pressure.Vacuum LevelThe term used to denote the degree of Rough, Medium, High, Hard, or Ultra Hard vacuum evidenced by its pressure in torr (mm HG).VamacDupont Performance Elastomers' name for Ethylene Acrylate.Vapor PressureThe maximum pressure exerted by a liquid (or solid) heated to a given temperature in a closed container.ViscosityA manifestation of internal friction opposed to mobility. The property of fluids and plastic solids by which they resist an instantaneouschange of shape, i.e., resistance to flow.VoidsThe absence of material or an area devoid of materials where not intended.Volume ChangeChange in volume of a specimen which has been immersed in a designated fluid under specified condition of time and temperature.Expressed as a percentage of the original volume.Volume SwellIncrease in physical size caused by the swelling action of a liquid.VulcanizationA thermo-setting involving the use of heat and pressure and which results in greatly increased strength and elasticity of rubber-likematerials.Vulcanizing AgentA material which produces vulcanization of an elastomer.Vulc-O-ringAn O-ring manufactured from O-ring cord by splicing and bonding or vulcanizing.WidthRadial dimension. For packing rings or sets the term "packing space" is preferred.Wiper ringA ring employed to remove excess fluid, mud, etc., from a reciprocating member before it reaches the seal.247All the information in this documentation has been compiled with the greatest of care.Despite this we can bear no responsibility whatsoever for any errors present in the documentation. The recommendations are intended as guidelines.www.eriks.info
Teflex-VMQ Silicone - Technical Data Sheet1. IntroductionERIKS Teflex O-Rings (VMQ silicone) are composed of a Silicone elastomerencapsulated in seamless FEP or PFA-cover. The elastomer works as a rubbermaterialand helps the slow recovery of the FEP or PFA-cover. The chemicalresistance of FEP and PFA is almos the same as PTFE. FEP and PFA comply withthe FDA and USP class VI regulations for contact with food and pharmaceuticals.2. Product DescriptionChemical • FEP : Copolymer of Hexa-Fluorpropylene andComposition : Polytetrafluorethylene (PTFE)PFA : Copolymer of Perfluoralkoxy and Polytetrafluorethylene (PTFE)• C : Methyl-Vinyl-Silicone RubberPhysical form O-RingsColour Red; cover: TranslucentStorage stability* : 10 years* : Fo lowing DIN 7716 conditions3. Physical PropertiesTest Method Norm Test ValuesSpecific Weight ASTM 1817 1,26Hardness ASTM 2240 70° ± 5° IRHDTensile Strength at break ASTM 412 8,6 MPaElongation at break ASTM 412 280%Compression Set, 22h/175°C ASTM D 395 B 32%FEP coverTensile Strenght ASTM 2116 28 MPaFusion Point ASTM D 3418 260°CPFA coverTensile Strength ASTM 2116 28 MPaFusion Point ASTM D 3418 305°C4. Temperature Resistancewith FEP: -60° to +204°C• with PFA: -60° to +260°C5. Chemical ResistanceConcentrated acids very goodAcetone very goodHydroxides very goodBenzol very goodCrude oil very goodToluene very goodASTM Fuel C very goodMEK very goodMTBE very goodWater very goodSteam : very good6. Advantages• Exce lent chemical resistance, comparablewith that of PTFE• Low compression set of silicone core7. Other InformationOther colours available on demand• FEP in conformity with Foods andDrugs Administration (21 CFR177.1550; 21 CFR 177.2600; 21 CFR175.105, 21 CFR 176.180; 21 CFR177.1520; 21 CFR 175.300; 21 CFR176.170)• PFA in conformity with Foods andDrugs Administration (21 CFR177.1550; 21 CFR 175.105, 21 CFR176.180; 21 CFR 175.300; 21 CFR176.170)• Silicone inside compliant with FDA 21CFR 177.2600• FEP and PFA in conformity with U.S.Pharmacopeia (USP) class VI• Ho low silicone cord on demandThis information is, to the best of our knowledge, accurate and reliable to the date indicated. The above mentioned datahave been obtained by tests we consider as reliable. We don’t assure tha the same results can be obtained in otherlaboratories, using di ferent conditions by the preparation and evaluation of the samples.S E A L I N G E L E M E N T S01.04.2004121Sealing ElementsTechnical Handbook O-rings22. On-line tools - Conversion TablesERIKS offers different methods of interactive customer solutions.Free programmes are available on our website.• O-Ring Design Calculator : Industry leading• Rubber Profile Calculator : Industry leading• O-Ring Weight Calculator : Industry leading• 130 data sheets : Industry leading• Comparison of plastics : Industry leading• Unit Converter : Industry leading• Chemical Resistance Guide : Industry leading• Approvals / Certificats : Industry leading Genuine Viton® X-ring 51414 - Technical Data Sheet1. IntroductionOriginal Viton ® X-ring 51414-compound is based on a 100% Genuine Viton ® polymer.Products out of this compound are being made according to strict guidelinesof DuPont Dow Elasomers. This guarantees a constant high quality level. A l productsca ry the specific, easy recognizable emblem on their package.2. Product DescriptionChemical Composition :Physical form :Colour :Odour :Solubility :Storage stability * :* : Following DIN 7716 conditions3. Physical PropertiesDipolymer of Hexa-Fluoropropylene and Vinylidene Fluoride,plus cure chemicalsX-RingsBlackNoneLow molecular weight Esters and KetonesExcelent Test Method Norm Test ValuesHardness DIN 53519 70° ± 5° IRHDTensile Strength at break DIN 53504 min 13 MPaElongation at break DIN 53504 min 170%Specific Weight ASTM D 1817 1,85Compression Set DIN 5351725% compression - 24h/200°C ASTM 395 Bon slab max 12%on O-Ring (3,53 mm) max 18%Heat Ageing 70h/250°C DIN 53508Hardness Change max +2°4. Temperature Resistance6. Advantages-20° to +200°CVery low compression set• TR10 (low temp. resistance): -16°C • Stock item for ca 400 dimensions5. Chemical Resistance7. Safety and HandlingConcentrated acids : excelentRead and be guided by theAcetone : badrecommendations in the DuPont DowHydroxides : excelentElastomers technical buletinBenzene : excelentH-71129-02, ‘Handling PrecautionsCrude oil : excelentfor Viton ® and Related Chemicals’.Toluene : excelentFuel C : excelent8. Other InformationGasoline : very good • Can be formulated to meet FDABTM oil 3 : excelent177.2600 compliance, or:Methylene chloride : very goodMil-R-83248B and AMS7276D.MEK : bad• Other colours available.MTBE : badWater < 100°C : very good This information is, to the best of our knowledge, accurate and reliable to the date indicated. The above mentioned datahave been obtained by tests we consider as reliable. We don’t assure tha the same results can be obtained in otherlaboratories, using di ferent conditions by the preparation and evaluation of the samples.S E A L I N G E L E M E N T S 01.04.200470 KIWA 248All the information in this documentation has been compiled with the greatest of care.Despite this we can bear no responsibility whatsoever for any errors present in the documentation. The recommendations are intended as guidelines.www.eriks.info
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