Angle relief valves for increased safety

90° angle relief valves protect cryogenic vessels and pipework from over-pressurisation by having a precisely set relief point at which they discharge excess pressure.

Product description

Angle relief valves are used for the combined purpose of enhanced safety and redirection of flow. Angle relief valves perform similarly to other relief valves by releasing excess pressure, thereby protecting machinery and personnel from incidents caused by over-pressurised vessels or pipework.

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Body: Bronze ASTM B61
Upper body: Stainless steel ASTM A582
Seat and stem: Brass ASTM B16
Poppet guide: Brass ASTM B16
Spring retainer: Brass ASTM B16
Adjusting screw: Brass ASTM B16
Cap: Brass ASTM B16
Ball: Stainless steel
Gasket: Copper ASTM B152-17
Spring: Stainless steel ASTM A313
Seal: PCTFE for < 75 psi, Fluorosilicone for ≥ 75 psi

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Gas types: Liquefied and vaporized atmospheric gases, LNG, Oxygen, Nitrogen, CO2 and Argon
Connections: Thread
Types: NPT
Sizes and range: 
Inlet: ½” to 1½ (15mm to 40mm)
Outlet: 1" to 2" (25mm to 50mm)
Pressure range: Up to 17.2 bar (250 psi)
Temperature range: -196˚C to +74˚C (-320˚F to +165˚F) 
Capacity: 406 to 2277 SCFM (690 to 3868 SCMH)
Series: AR 4100 and 06001 series 
Standards: TÜV IV, TPED, ASME

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

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  • Cleaned for Oxygen Service
  • 100% factory tested
  • Multiple inlet and pressure settings
  • Bubble tight seat
  • High flow rate
  • Right angle configuration eliminates direct flow through the spring and enables relief of gasses

Did you know?

BSP connections are available for the alternative AR5100 series

Bubble tight seat provides 100% shut off when reseating or in static mode

Get in touch!

Whether you already know what you need, or you would like the opinion of an expert, we are always ready to help you out.