PRESSURE REDUCING VALVE

PROBLEM TO BE SOLVED: To provide a pressure reducing valve capable of preventing a shape of a piston from being complicated, and allowed to be easily processed and assembled. SOLUTION: The pressure reducing valve 10 includes: a valve unit 18 provided between a primary port 32 and a secondary port 34; a cylinder 12 provided downstream of the valve unit 18; a piston 14 that divides a space in the cylinder 12 into a pressure reducing chamber 38 and a pressure regulation chamber 96 and opens or closes the valve unit 18 while sliding the inside of the cylinder 12; and a seal member 24 that is disposed in an inner peripheral face of the cylinder 12 and includes a slidably contacting piece 26a slidably contacting the piston 14 due to the pressing force of an elastic member 28. The cylinder 12 is composed of a body member 20 forming the pressure reducing chamber 38 and a cover member 22 forming the pressure regulation chamber 96. An annular groove 94 in which the seal member 24 is disposed is formed on a boundary portion between the body member 20 and the cover member 22. COPYRIGHT: (C)2011,JPO&INPIT