JPH0292509U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a sectional view of a pressure reducing valve according to an embodiment of the present invention, and FIG. 2 is a sectional view of the pilot valve portion of FIG. 10...main body, 12...inlet, 16...exit,
20... Piston, 22... Cylinder, 26...
...Pilot valve, 28...Diaphragm, 36...
...Pilot stem, 70...Stem guide, 7
2...Pilot valve body, 82a, b, c, d, e
...Annular groove.

Claims (1)

[Scope of utility model registration request] A pilot valve is placed between the passage leading to the primary side and the passage leading to the upper surface of the piston, and the pilot valve is driven by the deflection of the diaphragm, which has the elastic force of a pressure setting spring applied to the upper surface and the secondary side pressure applied to the lower surface. In a pilot type pressure reducing valve, which controls the fluid pressure acting on the piston by opening and closing the valve, and opens and closes the main valve port by driving the piston, the pilot valve is a valve that penetrates the stem guide that constitutes the pilot valve in the vertical direction. A stem guide hole is opened, a pilot valve seat forming a pilot valve opening is formed at the lower end of the stem guide hole, and a pilot valve body is arranged to open and close the pilot valve opening by seating on and off from below the pilot valve seat, A pilot valve of a pressure reducing valve characterized in that a pilot stem for operating a pilot valve element is slidably inserted into a stem guide hole, and an annular groove is formed on the outer circumferential surface of the pilot stem or the inner circumferential surface of the stem guide hole. structure.