Noise reducing relief valves

  • Bubble-tight up to 95% of set pressure
  • Tamper-proof
  • Repeatable and reliable performance

Mechanical vibrations and liquid dynamics can cause high pitched discharge sounds from relief valves. These relief valves reduce the noise by up to 50%, thereby greatly improving the working environment.

Body:
Brass
Spring:
Stainless steel
Seat retainer:
Brass
Gas types:
Argon, CO2, Nitrogen, Oxygen, Vaporized atmospheric gases
Connections:
Thread
Types:
NPT
Pressure range:
15.86 to 34 bar (230 to 500 psi)
Temperature range:
-196˚C to +74˚C (-320˚F to +165˚F)
Sizes and range:
¼"
Series available:
9400 series
Standards:
ASME, CRN, PED

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application.

Body:
Brass
Spring:
Stainless steel
Seat retainer:
Brass
Gas types:
Argon, CO2, Nitrogen, Oxygen, Vaporized atmospheric gases
Connections:
Thread
Types:
NPT
Pressure range:
15.86 to 34 bar (230 to 500 psi)
Temperature range:
-196˚C to +74˚C (-320˚F to +165˚F)
Sizes and range:
¼"
Series available:
9400 series
Standards:
ASME, CRN, PED

*Materials and specifications are subject to generalisation. Our experienced people are ready to help you find the correct fit for your application.

Alternative products

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Did you know?

For gas service only.

Pipeaway included and attached.

No drain hole in relief valve.

For example, NRF9432T140P leave blank for relief valve without pipe-away attached.

Pipeaway adapter part number NRF250-4.

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