The mechanical-pneumatic control valves are a simple yet effective solution. The level is constantly scanned by a plunger. The plunger position in transmitted to a slide valve. Depending on the slide valve position, pressure is either applied to the air spring or vented from the inside of the air spring. The level can be maintained at an accuracy + 0.1mm.
Principally three control valves are used. The incoming air supply is conditioned with a pressure regulator to limit system pressure to a maximum of 6 bar & with a water trap to remove vapor and an air filter to remove dust and any foreign bodies from the air supply.
Combined Rubber Air Spring Isolator FAEBI-HD with adjustable dampening:
Rubber air spring isolator FAEBI-HD is made of a combination of high grade elastomer & metal with an enlarged sidewall. In order to obtain as high a dampening effect as possible, the air space is split into two chambers (load / dampening volume) linked by an air tube. By the adjustable valve the dampening can be changed easily from outside. Due to the friction caused by the air stream passing through the bypass valve, it is possible to adapt the dampening to each application.