Proportional throttle valve

摘要

A proportional throttle valve includes a valve piston (2) functioning as a variable orifice and displaceably guided in the longitudinal direction in a valve housing (3) having a fluid inlet (4) and a fluid outlet (5). Since a leading edge (6) of the valve piston (2) is formed by a control piston (7) of a flow regulator (8) for the fluid connection of the fluid inlet (4) and the fluid outlet (5), the flow control valve and the proportional throttle valve are functionally combined in one valve unit.

主权项

1. A proportional throttle valve, comprising:
a valve housing having a fluid inlet, a fluid outlet, a longitudinal bore defined by an inwardly and radially facing housing wall and a longitudinal axis; a valve piston enabling an orifice function and being movably guided and engaged by said housing wall in said valve housing for movement along said longitudinal axis; and a control piston of a flow regulator being located in said valve housing and forming a metering edge of said valve piston for connecting said fluid inlet to said fluid outlet, said control piston having a first portion movably guided in and engaging a radially facing wall of an axial bore in said valve piston and a second portion extending outside said axial bore and engaging said housing wall, said metering edge being adjacent a junction of said first and second portions.