The GD back pressure valve is used to regulate a predefined pressure in aseptic processing plants (constant-pressure valve). The desired product pressure is reached by supplying compressed air to the pneumatic actuator.

A welded stainless steel folding bellow is used to hermetically seal the valve spindle from outside contamination. This special design and the durable valve seat seal made of Tefasep® enable optimum process security. Back-pressure valves are commonly used in pasteurization and sterilization plants.