The functioning of a control and shut-off valve becomes very demanding if the temperature drops to the range of absolute zero. In these extremely cold temperature ranges, each valve must be designed and optimised according to the application and fluid.
A cryogenic valve is one of the few elements which connect the cold pipeline with the liquid gas to the environment at ambient temperature.
This may result in a temperature difference of up to 300°C between the pipeline and the environment.
This temperature difference generates a heat flow from the warm to the cold area, which reduces the efficiency of a system and impairs the proper functioning of the valve under extreme circumstances if ice is formed at the warm end.
The challenge is to reduce the thermal resistance between the warm and the cold area, i.e. between the valve bonnet and the valve connections, as far as possible. WEKA cryogenic valves are characterised by a very low thermal resistance and thus contribute to a system's efficiency.