JPS61168407U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention in a valve closed state, and FIG. 2 is a cross-sectional view of the valve in an open state. A: Pressure sensitive chamber, 1: Valve housing, 2: Inlet chamber, 4: Outlet chamber, 6: Valve seat, 8: Valve hole, 9: Valve element, 11: Return spring, 12: Bellows, 12a: Lower end opening thereof ,
15: volume reduction material, 15a: central recess, 15b: outer periphery flange, 16: valve stem, 16a: lower end piece, 18: orifice plate, 18a: stopper, 19: locking member, 20: orifice, 21: guide hole, 22
: Support body, 22a: Its outer peripheral wall, 23: Adjustment bolt, 23a: Its threaded part, 24: Spring seat, 24a
: Its outer peripheral wall, 25 : Adjustment spring.

Claims (1)

[Scope of utility model registration request] A valve element that opens and closes a valve hole formed between an inlet chamber and an outlet chamber of a valve housing; a bellows with a closed end that expands and contracts by sensing the indoor pressure of the inlet chamber or the outlet chamber through an opening at one end; a volume reducing material inserted so as to greatly reduce the volume of the pressure sensitive chamber therein and fixed to the other end of the bellows; an adjustment spring biasing the volume reducing material toward the short circuit side of the bellows; In a pressure regulating valve having a valve stem interposed between a material and the valve element, a plate that guides sliding of the valve stem is fixed to a valve housing, and at least one of the plate and the volume reduction material. A pressure regulating valve characterized in that a stopper is formed to prevent the bellows from being shortened too much.