ERIKS nv - O-ring Technical Handbook

More documents

Recommendations

Info

Sealing ElementsTechnical Handbook O-rings21. GlossaryAbrasionProgressive wearing away of material by mechanical action.Abrasion ResistanceThe ability of a rubber compound to resist mechanical wear.AbsorptionThe physical mechanism by which one substance attracts and takes up another substance.Accelerated Life TestAny set of conditions designed to reproduce in a short time the deteriorating effect obtained under normal service conditions.Accelerated Service TestA service or bench test in which some service condition, such as speed, temperature, or continuity of operation, is exaggerated inorder to obtain a result in shorter time.AcceleratorA substance which hastens the vulcanization of an elastomer causing it to take place in a shorter time or at a lower temperature.Acid ResistantWithstands the action of acids.AdhereTo cling or stick together.AdhesionSusceptibility of rubber to stick to a contact surface.AflasTrade name of Asahi Glass for TFE Propylene.After CureContinuation of vulcanization after the desired cure is effected and the heat source removed.AgingTo undergo changes in physical properties with age or lapse of time.Aging, Air OvenA means of accelerating the change in physical properties of rubber compounds by exposing them to the action of air at an elevatedtemperature.Aging, Air Pressure HeatA means of accelerating the change in physical properties of rubber compounds by exposing them to the action of air under pressureat an elevated temperature.Aging, Oxygen BombA means of accelerating the change in physical properties of rubber compounds by exposing them to the action of oxygen at anelevated temperature and pressure.Air BombSimilar to an oxygen bomb but used with air. Used for accelerated aging test.Air ChecksSurface marking or depressions due to trapping air between the materials being cured and the mold or press surface.Air CuringThe vulcanization of a rubber product in air as distinguished from vulcanizing in a press or steam vulcanizer.Ambient TemperatureThe environment temperature surrounding the object under consideration.Aniline Point of OilThe lowest temperature at which equal volumes of pure aniline and a particular oil will completely dissolve in one another. The anilinepoint generally affects the swell.AntioxidantAn organic substance which inhibits or retards oxidation.Atmospheric CrackingCracks produced in surface of rubber articles by exposure to atmospheric conditions.Average ModulusTotal change of stress divided by total change of strain, i.e., the average slope of the stress-strain curve. Employed when modulus variesfrom point to point.239All 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
Sealing ElementsTechnical Handbook O-rings21. GlossaryBack RindA burn-back into the part at a mold line separation caused by too soft a rubber stock, excessive acceleration, or too low a plasticity.Back-up ringWasher-like device installed next to O-ring to prevent extrusion.Bench TestA modified service test in which the service conditions are approximated, but the equipment is conventional laboratory equipment andnot necessarily identical with that in which the product will be employed.Bending ModulusForce required to induce bending around a given radius, and hence a measure of stiffness.BleedingMigration to the surface of plasticizers, waxes, or similar materials to form a film or beads.BlemishA mark, deformity, or injury which impairs the appearance.BlistersA raised spot on the surface or a separation between layers usually forming a void or air-filled space in the vulcanized article.BloomA discoloration or change in appearance of the surface of a rubber product caused by the migration of a liquid or solid to the surface.Examples: sulfur broom, wax broom. Not to be confused with dust on the surface from external sources.BreakA separation or discontinuity in any part of an article.BreakoutForce to inaugural sliding. Expressed in same terms as friction. An excessive breakout value is taken as an indication of the developmentof adhesion.BrittlenessTendency to crack when subjected to deformation.Buna NA general term for the copolymers of butadiene and acrylonitrile. Typical commercial polymers are Hycar and Paracril.Buna SA general term for the copolymers of butadiene and styrene.Butt JointJoining two ends of material whereby the junction is perpendicular to the plane of an O-ring.ButylA synthetic rubber of the polybutene type exhibiting very low permeability to gases.240Coefficient of Thermal ExpansionAverage expansion per degree over a stated temperature range, expressed in a fraction of initial dimension. May be linear or volumetric.Cold FlexibilityFlexibility following exposure to a predetermined low temperature for a predetermined time.Cold FlowContinued deformation under stress.Cold ResistantWithstands the effect of cold or low temperatures without loss of serviceability.Commercially SmoothDegree of smoothness of the surface of an article which is acceptable for use.CompoundA term applied to either vulcanized or unvulcanized mixtures of elastomers and other ingredients necessary to make a useful rubberlikematerial.Compression ModulusThe ratio of the compressive stress to the resulting compressive strain (the latter expressed as a fraction of the original height or thicknessin the direction of the force). Compression Modulus may be either static or dynamic.Compression SetThe decrease in thickness of a rubber specimen which has been deformed under specific conditions of load, time, and temperature.It is usual expressed as a percentage of the initial compression of the test sample.All 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
Page 1 and 2:
Technisches Handbuch O-RingeEngl. V
Page 3 and 4:
Sealing ElementsTechnical Handbook
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190: Sealing ElementsTechnical Handbook
Page 239: Sealing ElementsTechnical Handbook
Page 249 and 250: Teflex-VMQ Silicone - Technical Dat
show all

ERIKS nv - O-ring Technical Handbook

Create successful ePaper yourself

Delete template?

Save as template?