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Pressure Relief Devices

Hydrogen Pressure Relief Valve - VS/AM 58 H

Pietro Fiorentini S.p.A.

  • Prevents downstream pressure from rising due to gas temperature change
  • Suitable for 100% hydrogen applications
  • Designed for high-pressure transmission systems and medium pressure gas distribution networks
  • Includes a limit switch BLD 211 as an available accessory
  • Features compact dimensions, fast response, and easy maintenance

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Description Vendor

The VS/AM 58 H is a relief valve designed to vent gas when system pressure exceeds the set value due to temporary events. It prevents downstream pressure from rising due to gas temperature changes, pressure shocks, or regulator lock-up failure. It is suitable for 100% hydrogen applications and is used in high-pressure transmission systems and medium pressure gas distribution networks. Key features include compact dimensions, fast response, easy maintenance, and a limit switch option (BLD 211). It is certified according to European Directive 2014/68/EU (PED) and meets EN4126-1 standards. The valve is constructed with an aluminium body, stainless steel plug and valve seat, and is available with optional nitrile rubber or viton seals. It operates within a design pressure range of up to 10 MPa or 100 barg, and functions within ambient temperatures ranging from -20 °C to +60 °C. The product is ideal for applications requiring reliable pressure relief in hydrogen systems, ensuring safety and efficiency in both high-pressure and medium-pressure environments.

Use Cases

  • high-pressure transmission systems
  • medium pressure gas distribution networks
  • 100% hydrogen applications

Capabilities

  • prevent downstream pressure from rising due to gas temperature change
  • prevent downstream pressure shocks caused by sudden changes of flow
  • suitable for 100% hydrogen applications
  • fast response
  • easy maintenance
  • limit switch option (BLD 211)
  • adjustment nut sealing
Pietro Fiorentini S.p.A. Pietro Fiorentini S.p.A., a leading Italian manufacturer of gas pressure regulation and control equipment, has adapted its family of pressure regulators and stabilisers for the safe delivery of low-pressure hydrogen in various applications, including residential and commercial use, alongside high- and medium-pressure regulators crucial for safe and efficient hydrogen flow management along pipelines. The company's Mod. FE H is a direct-operated gas pressure regulator specifically designed and manufactured for 100% hydrogen applications, classified as Fail Close and used for low-pressure gas distribution networks as well as residential and commercial hydrogen delivery, while its high- and medium-pressure hydrogen regulators are designed to ensure precise pressure regulation, preventing dangerous situations and guaranteeing constant flow under all load conditions along the hydrogen pipeline. Pietro Fiorentini's broader gas regulator portfolio -- including the FE, FE25/FE50, and FE-100 two-stage spring-loaded lever-operated gas pressure regulators, and the Aperflux 851 pilot-operated regulator for high-pressure transmission and medium-pressure distribution networks -- has been designated 'Hydrogen Ready' for NG-H2 (natural gas-hydrogen) blending applications, suitable for use with previously filtered non-corrosive gases including biomethane and natural gas blended with hydrogen, classified as Fail Close per European Standard EN 334 due to integrated overpressure protection (slam shut valve). The company's HBC slam shut valves (4-12 inch sizes, ANSI 300#-600# rating) provide MAOP protection for shale gas and pipeline applications alongside power plant feeds and city gate stations, with Pietro Fiorentini continuing to develop and adapt its extensive gas pressure regulation technology portfolio to support the safe integration of hydrogen into existing natural gas distribution and transmission infrastructure worldwide.
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