Patent ID: 9506572
Filing Date: 2016-11-29
CPC Classification: F16K,G05D

Claim Text:
1. A flow regulating device comprising: a first housing including a pressure chamber formed therein into which an operating gas is externally introduced; a second housing including a valve chamber formed therein, an upstream flow channel formed therein for providing communication between the valve chamber and an inlet port, and a downstream flow channel formed therein for providing communication between the valve chamber and an outlet port; a valve element part housed in the valve chamber, the valve element part being movable into contact with or away from a valve seat part provided on an inner circumferential surface of the valve chamber so as to form a closed state in which communication is shut off between the upstream flow channel and the downstream flow channel, or an open state in which communication is provided between the upstream flow channel and the downstream flow channel; a diaphragm connected to the valve element part, the diaphragm having a fluid facing surface which faces a fluid, and a gas facing surface which faces the operating gas; and a guide member connected to the diaphragm, the guide member being slidably movable on an inner surface of the pressure chamber in an axial direction of the valve element part with the movement of the valve element part while being in a state in which the guide member is in contact with the inner circumferential surface of the pressure chamber, the guide member having a first end surface facing the pressure chamber and a second end surface being opposite from the first end and facing the diaphragm, the second end of the guide member contacting the diaphragm, wherein the pressure chamber is a chamber which is formed by the first end surface of the guide member and an inner circumferential surface of the first housing in which the guide member is inserted in a state where the guide member contacts with the inner circumferential surface of the first housing, and wherein the guide member moves along the inner circumferential surface of the first housing by an urging force exerted on the first end surface of the guide member by the operating gas introduced into the pressure chamber.