DIATAX CORPN.

DIATAX CORPN.

Elastomer Material Selection

Elastomer Material Selection

Rubber has a variety of physical properties, such as tensile strength, elongation, modulus, compression set, and tear resistance, as well as chemical compatibility. All of these properties must be considered when selecting a rubber to be used in a Diaphragm or Orings or Gaskets or Any other custom molded part. Contact  Diatax representative for customized rubber selection for your application.

Widest Range

Elastomer Material Selection

Diatax Offers complete range of Elastomer materials to suit a wide array of applications.

  • Natural Rubber
  • Butyl
  • Ethylene Propylene (EPDM)
  • Fluoro Carbon (FKM, Viton)
  • Fluoro Silicone (FVMQ)
  • Hydrin (CO/ECO)
  • Neoprene (CR)
  • Nitrile (NBR)
  • Silicone (VMQ)
  • Styrene Butadyene (SBR)

Physical Properties

Elastomer Type(ASTM Designation) Butyl (IIR) Ethylene Propylene (EPDM) Fluoro- Carbon (FKM) Fluoro- Silicone (FVMQ) Hydrin (CO/ECO) Neoprene (CR) Nitrile (NBR) Silicone (VMQ) Styrene Butadyene (SBR)
Compression Set Resistance Good Fair Good-Excel Fair-Good Fair-Good Fair-Good Good Good-Excel Good
Durometer Range (Shore A) 30-100 30-90 50-95 35-80 30-95 40-95 20-90 25-90 40-100
Elongation % 300-800 200-800 100-450 100-500 300-400 650-850 400-600 90-900 400-550
Tensile Strength (PSI) 2,000+ 1,500-3,000 1,500-3,000 350-850 1,500-2,000 2,000-3,000 1,000-3,500 600-1,500 2,000+
Nitrogen Permeability Resistance Excellent Good Excellent Poor Excellent Fair Good Poor Fair
Resilience Excellent Good Fair Good Good Excellent Good Poor-Excel Good

 

Mechanical Resistance Properties

Elastomer Type(ASTM Designation) Butyl (IIR) Ethylene Propylene (EPDM) Fluoro- Carbon (FKM) Fluoro- Silicone (FVMQ) Hydrin (CO/ECO) Neoprene (CR) Nitrile (NBR) Silicone (VMQ) Styrene Butadyene (SBR)
Abrasion Good Good Good Fair Fair-Good Good Excellent Poor-Excel Excellent
Electrical Properties- Insulating Good Excellent Fair Excellent Poor-Fair Fair Fair Excellent Excellent
Electrical Properties- Conductive Fair Poor Excellent Poor Excellent Fair Fair Poor Poor
Impact Good Good Poor-Good Fair Good Good Fair Poor-Good Excellent
Tear Good Poor Poor-Good Fair Good Good Good Poor-Good Fair

 

Temperature Resistance Properties

Elastomer Type(ASTM Designation) Butyl (IIR) Ethylene Propylene (EPDM) Fluoro- Carbon (FKM) Fluoro- Silicone (FVMQ) Hydrin (CO/ECO) Neoprene (CR) Nitrile (NBR) Silicone (VMQ) Styrene Butadyene (SBR)
Cold Termperature Flexibility Good Good Fair-Good Good Good Fair Good Excellent Good
Flame Retardance Poor Poor-Fair Excellent Outstanding Fair Good Poor-Fair Fair-Poor Poor
Heat Aging Good Excellent Outstanding Outstanding Excellent Good Good Excellent Good

Environmental Resistance Properties

Elastomer Type(ASTM Designation) Butyl (IIR) Ethylene Propylene (EPDM) Fluoro- Carbon (FKM) Fluoro- Silicone (FVMQ) Hydrin (CO/ECO) Neoprene (CR) Nitrile (NBR) Silicone (VMQ) Styrene Butadyene (SBR)
Ozone Good Excellent Outstanding Outstanding Excellent Excellent Poor Excellent Poor
Radiation Fair-Good Poor Fair-Good Good-Excel Fair Fair-Good Fair-Good Fair-Good Good
Weather Excellent Excellent Excellent Outstanding Good Excellent Good Excellent Fair

 

Chemical Resistance Properties

Elastomer Type(ASTM Designation) Butyl (IIR) Ethylene Propylene (EPDM) Fluoro- Carbon (FKM) Fluoro- Silicone (FVMQ) Hydrin (CO/ECO) Neoprene (CR) Nitrile (NBR) Silicone (VMQ) Styrene Butadyene (SBR)
Acid-Dilute Concentration Fair Good-Excel Fair-Good Good-Excel Fair-Good Good-Excel Fair-Good Fair-Good Fair-Good
Aliphatic Hydrocarbons Poor Poor Excellent Excellent Excellent Good Excellent Poor-Fair Poor
Alkali-Dilute Concentration Fair-Good Good-Excel Good-Excel Good-Excel Fair-Good Good-Excel Good-Excel Good-Excel Fair-Good
Aromatic Hydrocarbons Poor Poor Excellent Good-Excel Excellent Fair Fair-Good Poor Poor
ATF Type A Poor Poor Excellent Excellent Good Good Excellent Good Poor
Chlorinated Hydrocrbons Poor Poor Excellent Good-Excel Good-Excel Poor Fair-Good Poor Poor
Diesel Oil Poor Poor Excellent Good Excellent Fair Good-Excel Poor Poor
Diester Lubricants Poor Poor Excellent Excellent Good Poor Fair-Good Poor Poor
EP Lubricants Poor Poor Excellent Excellent Poor Poor-Fair Fair Good Poor
Ethyl Alcohol Fair Good-Excel Excellent Excellent Good Excellent Good Excellent Fair
Ethylene Glycol Excellent Excellent Excellent Excellent Excellent Excellent Excellent Excellent Good
Ethylene Glycol/Water Fair-Good Good Good Good Fair Good Good Excellent Good
Gasoline Poor Poor Excellent Excellent Good-Excel Fair Good-Excel Poor Poor
Hydraulic Fluids- Petroleum Base Poor Poor Excellent Excellent Excellent Poor-Fair Fair-Good Poor Poor
Hydraulic Fluids- Silicate Ester Fair Poor Excellent Outstanding Fair-Good Good Good Poor Poor-Fair
Hydraulic Fluids- Phosphate Ester Good Good Poor Poor Poor Fair Good Poor
Ketones Good Fair-Excel Poor Poor Fair Fair Poor Fair-Good Good
Lubricating Oils- High Aniline Fair Poor Excellent Excellent Excellent Good Good-Excel Good Poor
Lubricating Oils- Low Aniline Good Poor Excellent Excellent Excellent Fair Fair-Excel Poor-Fair Poor
Silicone Oil Good Excellent Excellent Excellent Excellent Excellent Good Poor Good
Steam Above 250°F (121°C) Poor-Fair Excellent Fair Poor-Fair Poor Fair Fair Poor-Fair Poor-Fair
Water-212°F(100°C) Good Excellent Excellent Excellent Good Good Excellent Excellent Excellent

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