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 Oring or Gaskets or Any other custom molded part. Contact Diatax representative for customized rubber selection for your application.
Diatax Offers complete range of Elastomer materials to suit a wide range of applications:
| 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 Butadiene (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 |
| 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 Butadiene (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 |
| Elastomer Type (ASTM Designation) | Butyl (IIR) | EPDM | FKM | FVMQ | Hydrin (CO/ECO) | Neoprene (CR) | Nitrile (NBR) | Silicone (VMQ) | SBR |
|---|---|---|---|---|---|---|---|---|---|
| Cold Temperature 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 |
| Elastomer Type (ASTM Designation) | Butyl (IIR) | EPDM | FKM | FVMQ | Hydrin (CO/ECO) | Neoprene (CR) | Nitrile (NBR) | Silicone (VMQ) | 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 |
| 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 Butadiene (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 Hydrocarbons | 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 |