Servoventil til flydende og gasformige medier, hvilken ventil påvirkes af sit eget medium og styres af en bistabil magnetventil

A compression space (4) which is connected to the valve inlet (Z), is arranged on one side of a differential piston (2) supporting the valve plate (2.1), a control space (5) being arranged on its other side. The compression space (4) is connected via the valve seat (3) to the valve outlet (A) and, via a control orifice (10) in the differential piston (2), to the control space (5). The control space (5) is connected to the valve outlet (A) via a relief channel (6.1-6.2-6.3) which is guided through the magnetic valve seat (9). The magnet coil (16), which is surrounded by a magnet yoke (18), contains a guide tube (15) in which a magnet armature (14) is guided such that it can be displaced freely, the magnet armature seal (8) being arranged on the one end of the magnet armature (14), while its other end is opposite a head piece (17). The magnet armature (14), head piece (17) and magnet yoke (18) consist of soft-magnetic material. The opening impulse magnetises the head piece (17), attracts the magnet armature (14) and opens the magnetic valve. When the closing impulse, which counteracts the magnetisation, occurs, the intrinsic weight of the magnet armature (14) causes it to fall and the magnetic valve closes. The valve can be driven with an energy requirement of approximately 10 mWs per operation cycle.