Indicator-equipped flow regulating valve
AssigneeSMC Corporation
InventorYoshihiro Fukano
Life of this patent
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Abstract
An indicator-equipped flow regulating valve includes a valve body through which a fluid flows, a connecting body connected to an upper portion of the valve body, a housing connected to an upper portion of the connecting body, a piston arranged in the connecting body and the housing and displaceable when pressed by the pilot air, a shaft connected to the piston, a diaphragm connected to a lower end of the shaft and seated on a valve seat formed in the valve body, a flow regulating section regulating the flow rate of the fluid flowing through the valve body, and an indicator section indicating an opened/closed state of the diaphragm.
Claims11
An indicator-equipped flow regulating valve comprising:
- a piston provided displaceably in an axial direction by pilot air supplied via a pilot port;
- a shaft connected to said piston;
- a valve plug connected to one end of said shaft and closing a fluid passage when seated on a valve seat;
- a flow regulating section provided separately from said shaft and regulating a valve opening degree of said valve plug;
- and
- an indicating section which is displaceable to positions for indicating valve-opened and closed states of said valve plug by said pilot air supplied via a first pilot passage communicating with said pilot port,
- wherein a check valve is provided at one end of said shaft to give an opened state when pressed by a projection provided at a position facing said shaft, and said check valve is in said opened state when said valve plug is separated from said valve seat in said valve-opened state so that said indicating section is displaced to said position for indicating said valve-opened state of said valve plug by said pilot air supplied via said check valve.
Dependencies are inferred from the claim text.