EPDM
Ethylene Propylene Diene Monomer rubber. A common elastomer for valve seats and seals. Good resistance to hot water, steam (to 120 degrees C), ozone, and weathering. Not suitable for oils, fuels, or aromatic hydrocarbons. Used in water treatment, HVAC, and food-grade butterfly and diaphragm valves.
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What is EPDM used for in industrial valves?
Ethylene Propylene Diene Monomer rubber. A common elastomer for valve seats and seals. Good resistance to hot water, steam (to 120 degrees C), ozone, and weathering. Not suitable for oils, fuels, or aromatic hydrocarbons. Used in water treatment, HVAC, and food-grade butterfly and diaphragm valves.
When should I specify EPDM for valve body or trim?
EPDM is specified when the process fluid, temperature, or pressure requirements exceed what standard carbon steel (A216 WCB) or austenitic stainless steel (A351 CF8M) can handle. Material selection must consider corrosion rates, maximum and minimum design temperatures, and compliance with NACE MR0175 for sour service. Vajra Industrial Solutions can supply valves in EPDM with full mill certificates.
Is EPDM compatible with sour (H2S) service per NACE MR0175?
Material qualification for sour service (NACE MR0175 / ISO 15156) depends on the hardness limits, heat treatment condition, and UNS designation of the specific alloy. For H2S-containing service, the valve material order and PMI (positive material identification) must be verified against the applicable NACE material group. Contact Vajra Industrial Solutions for material recommendations specific to your H2S partial pressure and chloride conditions.
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