NBR (Nitrile Rubber)
A synthetic rubber with good resistance to petroleum-based oils and fuels, making it common for valve O-rings and seats in hydrocarbon service. Temperature range: -40 degrees C to +120 degrees C. Not suitable for steam, hot water, or oxygenated solvents.
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Frequently Asked Questions
What is NBR (Nitrile Rubber) used for in industrial valves?
A synthetic rubber with good resistance to petroleum-based oils and fuels, making it common for valve O-rings and seats in hydrocarbon service. Temperature range: -40 degrees C to +120 degrees C. Not suitable for steam, hot water, or oxygenated solvents.
When should I specify NBR (Nitrile Rubber) for valve body or trim?
NBR (Nitrile Rubber) 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 NBR (Nitrile Rubber) with full mill certificates.
Is NBR (Nitrile Rubber) 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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