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Automotive and transport

Fuel Cell Systems allow electrically driven vehicles to have an extended range with zero emissions.

Through the application on vehicles, valves within such fuel cell systems are exposed to extreme environmental conditions where these valves have to work absolutely reliably; last but not least because of the fact that hydrogen is typically used as propellant.

Switching and controlling reliably

There are the following typical valve-requirements on vehicle fuel cell systems:
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A (safety-)shut-off-valve

must close safely in any situation (mechanical shock, power loss, ...) and be leakage-free thereafter. During permanent operation it has to operate energy efficient and consume lowest energy possible. Depending on the specific application, further parameters have to be adapted such as port size, switching time, etc.

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A pressure control valve

is ideally a proportional valve or alternatively a pulse-width-driven switching valve. The pressure control valve must react quickly in order to ensure a precise control mode within a closed loop control circuit.

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A purge/drain valve

controls the release of the condensate, most likely water. The valve has to be frost approved which means, that the expanding liquid must not permanently damage the valve structure and the valve should have a de-frost function.

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