Proportional flow valve control servo - has displacement transducer in housing of control magnet with core in housing bore

摘要

Large batch production of proportional servo valves simplifies the assembly using the displacement pick-up inside the housing of the proportional control magnet. The assembly provides maximum coaxiality between the inductive pick-up and the magnet. It also eliminates sealing at the back of the stroke chamber of the magnet core (12) which may interfere with the movement. The rod (11) of core (12) of the proportional control magnet (4) projects through the bearing (9) and the additional magnetic core (14) is in the centre of measuring coil (19) of the pick-up. The other end rod of the core is in bush (15).