Industrial gas solutions provider Witt Gas (Witt) is accommodating a switch to more sustainable energy sources with its range of safety valves suited for hydrogen electrolysers.

As industry transitions away from fossil-based fuels and moves towards more sustainable alternatives such as green hydrogen, demand is set to increase substantially. 

To ensure the mitigation of carbon dioxide (CO2) emissions when manufacturing the amounts of hydrogen required for industrial processes such as the manufacture of artificial fertilisers and steel, in addition to mobility applications such as fuel cell vehicles, the hydrogen needs to be generated from electrolysis. 

Comprising of several stacks of electrolysis cells, large hydrogen electrolysers can be used to produce clean, green hydrogen. 

The high amount of pressure involved in the process creates a need for safety valves which match the target pressure and temperature ranges of PEM and solid oxide electrolysers. 

Source: Witt Gas

Witt’s safety valves AV 619 and AV 919 are capable of meeting these ranges, with the opening pressure able to be set within a range of 5 to 500 mbar at an operating temperature of up to 250C. 

Alkaline electrolysers are suitable for safety valves with a lower pressure and operating temperature, such as the SV 805, which works between 0.5 and 45 bar up to 150C. 

The oil and grease-free valves, which can be installed in any position with various inlet and outlet connections, come with the elastomers required for hydrogen, including EPDM (Ethylene Propylene Diene Monomer) or FFKM (Perfluoroelastomer, also known as FFPM).