Hydrogen High Performance Butterfly Valves- Series HG1

by GEFA Processtechnik GmbH

  • Proven and reliable design even high pressures
  • Sizes: DN 50 – DN 800
  • Pressure ratings: PN 6-40 / PS 25 or 40, ASME Cl 150/300
  • Temperature range: -50 °C to + 400 °C
  • Face-to-face dimension DIN EN 558 line 20, 25, 16 API 609 table 1
  • Approvals for the hydrogen sector: ATEX Directive 2014/34/EU Zone 0 IIC (hydrogen), TA-Luft VDI 2440 and ISO 15848-1, Firesafe ISO 10497
See technical datasheets
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High Performance Double Offset Wafer Butterfly Valves – Series HG1

    • The hydrogen valve can be customized to suit your application and requirements:
      • 9 different seat ring materials
      • Several cleaning standards, including for technical gases
    • Requirements for the hydrogen sector:
      • Tightness inside (absolutely tight)
      • Tightness outside (technically permanently tight)
      • High pressure resistance
      • Resistance to hydrogen embrittlement
    • Additional standards for hydrogen ball valves:
      • Special cleaning procedures
      • Separate assembly
      • Careful packaging
      • Clear labeling
    • Certificates / Approlvals:
      • PED 2014/68/EU, ATEX 2014/34/EU Zone 0 IIC, Fire Safe ISO 10497, TA-Luft, EC 1935/2004, FDA, USP Cl VI, SIL, and others – several cleaning standards, including for technical gases.

Certifications_Approvals H2

Key features

  • Automation:
    • Standard mounting flange according to EN ISO 5211
    • Direct actuator mounting without interruption of the stem
    • Variable and exchangeable for any actuator size
    • Actuator protection against leakage
  • Safety TA-Luft ISO 15848-1:
    • Stem sealing can be re-tensioned beneath the mounting flange; thus, it can be readjusted without dismounting the actuator.
  • Long service life:
    • The insert ring of the body efficiently protects the seat ring from the direct medium flow and prevents wear such as erosion and abrasion.
  • Reliability:
    • Reliable sealing against high pressures and low torques due to the double offset design.
    • Low wear switching characteristics.
  • Exact and variable: Face-to-face dimension: EN 558 line 20/25/16
  • Option: Design with groove / spring EN 1092, form D
  • Precise mounting: Easy mounting due to centring aids for all standard flanges.
  • Service-friendly: The axial centring of the stem can be reached easily and is prepared for later service.
  • Efficient and safe:
    • GEFA-MULTITOP Efficient automation with variable interface without interruption of the stem.
    • Pivoting angle limitation and optical position indicator at the stem prevents wrong position of the stem during servicing.
    • The cylindrical screws fix the mounting flange without transferring torques (driving torques).
    • The clamping sleeves guarantee a clearance-free connection between the mounting flange and the body and transfer the driving torques.

Technical specifications

  • Sizes: DN 50 – DN 800
  • Pressure ratings: PN 6 – 40, ASME Cl 150/300, PS 25 or PS 40
  • Temperature range: -50 °C to + 400 °C
  • Face-to-face dimension DIN EN 558 line 20, 25, 16 API 609 table 1
  • Connections:
    • Intermediate flange valve that can be flanged on both sides
    • Double flange variant


  • Body: 1.0619, 1.4408
  • Valve disc: 1.0619/nickel-plated, 1.4408, 1.4408/nitrated
  • Shaft: 1.4571
  • Seat ring: PTFE/glass, PTFE/1.4571/Graphite, PTFE/1.4571/nitrated + Graphite
  • Bearing bush: 1.4401/PFTE, 1.4571/nitrated
  • Package: PTFE, Graphite
  • Insert ring: C-steel, 1.4571
  • For other material requirements, please contact the Vendor!

Application areas

  • Production
    • Power-to-gas, electrolysis,
    • Steam reformation, Pyrolysis
  • Infrastructure
    • Gas pipelines
    • Gas storage
  • Applications
    • Transport-/distribution network
    • Commercial/industrial use

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Contact us

  • GEFA Processtechnik is your reliable partner for hydrogen applications with extensive experience. Interested? Please contact the vendor by filling in the contact vendor form and request for quote form.
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Min Ambient Temperature (in °C)

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Brochure_GEFA_High Performance Butterfly Valves

Technical datasheet

Technical datasheet_Hydrogen High Performance Butterfly Valves- Series HG_1

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      GEFA Processtechnik GmbH

      GEFA Processtechnik GmbH has been offering innovative solutions in the fields of industrial valves and filtration technology since 1964. They also have a wide product range for specific applications and are happy to work with you to develop customised solutions for your requirements. GEFA attach great importance to quality, innovative strength and expertise. They are characterised by a strong international presence and are represented in more than 20 countries worldwide. GEFA Processtechnik's  extensive warehousing guarantees short delivery times and a quick response to your requirements.

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