H2-Pressure Relief Valve

WEH® H2-pressure relief valves relieve fluid systems when a preset pressure is reached. This protects the
installed components from wear or damage caused by excessive pressure.
The WEH® H2-pressure relief valves remains closed until the set pressure is reached thanks to a built-in spring. If the set
pressure is exceeded, the valve opens and discharges excess medium via a medium outlet (B2).
Sealing is provided by a replaceable soft seal. Delivery includes a pressure ring and pressure screw for the Cone & Thread
Medium Pressure tube connection 9/16“.
The pressure relief valves are factory-set and tested, and the adjustment screw is then locked and sealed to prevent
unintentional adjustment.
Please specify the desired set pressure when ordering. The maximum operating pressure of the entire system should not
exceed 90% of the set pressure.

Notes:
• WEH® H2-pressure relief valves are not considered safety valves or safety accessories within the meaning of the Pressure
Equipment Directive 2014/68/EU or the ASME Boiler & Pressure Vessel Code.
• The actual set pressure may vary due to temperature fluctuations or after long intervals between actuations.

Application
WEH® H2-relief valves have been specially developed and tested for hydrogen applications.
The housings are made from special 316L alloys and the seals are hydrogen-compatible.
Typical applications include hydrogen storage systems, compressor systems and dispensers, as well as test systems for
hydrogen components.
Separate versions are available for hydraulic applications or those involving other gases. Please feel free to enquire!