Fabric-Reinforced Diaphragm Sheet

Diaphragm Rubber

Diaphragm rubber is purpose-built for pump, valve, and actuator applications where a thin, flexible membrane must withstand repeated flexing under pressure. We supply fabric-reinforced diaphragm sheet in nitrile, neoprene, and Viton/Nomex constructions for chemical and temperature service from ambient to 200 °C.

At a Glance

Temperature Range

Depends on elastomer — -40 °C to +205 °C

Thickness Range

0.38 mm to 6 mm

Hardness Range

50–70 Shore A (effective)

Brands We Stock

ReglinDERA
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Technical Properties

Typical values across stocked grades. Specific grade data sheets available on request.

Temperature Range-40 °C to +205 °C. Depends on elastomer
Thickness Range0.38–6 mm stocked
Reinforcement OptionsNylon / Polyester / Nomex aramid fabric
Elastomer OptionsNitrile (NBR), Neoprene (CR), Viton (FKM)
Hardness (ASTM D2240)50–70 Shore A effective
Tensile Strength (ASTM D412)8–18 MPa. Compound dependent
Flex Life (ASTM D430)Engineered for >1 million cycles
Burst PressureRated per diaphragm design. Fabric reinforcement critical
Oil Resistance (NBR grades)Excellent. ASTM Oils 1, 2, and 3
Chemical Resistance (FKM grades)Excellent. Acids, fuels, solvents
Fabric Bond StrengthHigh. Tested per ASTM D413
Specific Gravity (ASTM D792)1.20–1.90. Varies by compound and plies

Common Applications

  • Diaphragm pump membranes
  • Control valve actuator diaphragms
  • Pressure regulator diaphragms
  • Metering pump membranes
  • Gas meter and flow control diaphragms
  • Pneumatic actuator seals
  • Chemical dosing pump membranes
  • Hydraulic accumulator bladders

Available Grades

Brands we stock: Reglin, DERA

Nitrile Diaphragm (NBR/Nylon)

The most common diaphragm construction — nitrile rubber with nylon fabric reinforcement. Excellent oil and fuel resistance with good flex life. Our standard grade for petroleum and hydraulic fluid service.

Neoprene Diaphragm (CR/Nylon)

Neoprene with nylon reinforcement for broader chemical compatibility and moderate oil resistance. Used in water, refrigerant, and general chemical service diaphragms.

Viton/Nomex Diaphragm (FKM/Nomex)

Premium Viton rubber with Nomex aramid fabric for high-temperature and aggressive chemical service. Used where nitrile or neoprene diaphragms cannot withstand the operating conditions.

Related Resources

Chemical Compatibility

Check elastomer resistance for your specific diaphragm application.

Sheet Rubber Selection

Compare base elastomers side by side to choose the right diaphragm compound.

Related Materials

Nitrile (NBR) Neoprene (CR) Viton (FKM)

Need Diaphragm Rubber?

We supply diaphragm rubber in sheet, roll, and custom die-cut forms. Contact our team for pricing, data sheets, or technical assistance.

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Disclaimer

This resource is provided for general engineering reference only and does not constitute professional advice, specification, or guarantee of performance. Actual results depend on specific application conditions. Universal Gaskets Pty Ltd accepts no responsibility or liability for decisions made based on this information. For full terms, see our Terms & Conditions.