Elastomers for Diaphragms

Dia•Com has developed an extensive inventory of rubber compound formulations to meet the demands of a wide range of rolling diaphragm applications, and maintains a full-time Rubber Chemist on-staff, constantly working to develop rubber formulations to meet the demands of an ever-changing industry.

Dia•Com works with all types of rubber materials, such as, Nitrile, EPDM, Neoprene, Fluorosilicone, Silicone, SBR, Fluoroelastomers (Viton®), Hydrin and Vamac®. Specialty compounds have been developed that include FDA grade, chloramine resistant compounds NSF 61 approved , and UL-157 and EN-549 approved for use in propane.

View our approval on the NSF web site http://www.nsf.com/Certified/PwsComponents/Listings.asp?Company=1C310&Standard=061

View our UL 157 JMST2 certificates:

View our UL 157 JMLU2 certificate:

View EN-549 ceritficate: English Deutsche

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 rolling diaphragm. Contact a Dia•Com representative for proper rubber selection.

Chemical Compatibility Tables

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-Excel	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 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	Poor	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

Related Phrases:

diaphragm goods, membrane rubber

Dia•Com is a leading international provider of innovative, cost-effective molded diaphragm solutions critical to the operation of essential systems and equipment in industrial, automotive, aerospace, medical instrumentation, and food and water processing applications. The company's reputation for excellence is based on superior quality in the design, manufacture and application of its high-performance, state-of-the-art, fabric-reinforced and homogeneous elastomeric rubber seals. Our custom engineered solutions are found in many products today, including diaphragm pumps, rubber seals, pneumatic diaphragm pumps, high pressure diaphragm pumps, viton gaskets, diaphragm carburetor, diaphragm pressure gauges, diaphragm vacuum pumps, diaphragm air compressors, diaphgram fuel pumps and diaphragm metering pumps.

fabric diaphragms | coated fabric diaphragms | elastomer diaphragms

Elastomers for Diaphragms

Chemical Compatibility Tables

Physical Properties

Mechanical Resistance Properties

Temperature Resistance Properties

Environmental Resistance Properties

Chemical Resistance Properties

Related Phrases: