Patent ID: 8840081

Claim:
A piloted proportional throttle valve, comprising: a valve housing having a fluid inlet, a fluid outlet, a longitudinal axis and a piston valve seat; a valve piston guided to move in said valve housing along said longitudinal axis and having a front and a back, fluid pressure on said back pressing said valve piston against said piston valve seat, said valve piston having a bore connecting said back with said fluid outlet facing said front to reduce pressure on said back of said valve piston for an opening motion of said valve piston away from said piston valve seat; a pilot valve device having an actuating member movable along said longitudinal axis by an electrically triggerable magnet system and interacting with a pilot valve seat in said bore of said valve piston, said pilot valve seat being cleared for opening motion of said valve piston and being closed by said actuating member to build up fluid pressure on said back of said valve piston by a supply of pilot fluid to press said valve piston against said piston valve seat; and a flow baffle device in a pilot channel extending radially relative to said longitudinal axis in a wall of said housing between said back of said valve piston and said fluid inlet of said housing and having a gap filter for the pilot fluid, said pilot channel having an inner channel mouth in fluid communication with said back of said valve piston and on outer channel mouth in fluid communication with said fluid inlet flow device having a blind bore.