ENTSPANNUNGSVENTIL.

摘要

PCT No. PCT/JP86/00282 Sec. 371 Date Dec. 17, 1986 Sec. 102(e) Date Dec. 17, 1986 PCT Filed Jun. 6, 1986 PCT Pub. No. WO86/07476 PCT Pub. Date Dec. 18, 1986.A pressure reducing valve assembly comprising a main valve (11) and a pilot valve (22), wherein a cylindrical chamber (12) of the main valve (11), which has annular grooves (17, 16, 15) provided with an inlet port (A), an outlet port (B), and a return port (T), respectively, accommodates therein a slidable spool (13) so that a pilot chamber (18) opening into the outlet port (B) is formed at one end of the spool (13) and at the other end thereof is formed a control chamber (25). The inlet port (A) of the main valve (11) being connected with that (a) of the pilot valve by way of a passage (51) while the control chamber of the main valve is connected with the outlet port (b) of the pilot valve by way of a passage (52), whereby the fluid pressure at the outlet port of the main valve can be set high with a small operating force of an electromagnetic unit (48) of the pilot valve (22). This pressure reducing valve assembly is used to regulate the pressure of the fluid to be supplied to or drained from a hydraulic cylinder of a car clutch, for example.