| 摘要 |
An anti-hunting, pilot controlled, diaphragm valve including a diaphragm disposed in a casing to define a chamber therewith, a valve face carried by the diaphragm and disposed adjacent a valve seat in the casing to control flow between an inlet and an outlet in the casing, bleed holes in the diaphragm to provide communication between the inlet and the chamber, a central passageway through the valve face to provide communication between the outlet and the chamber, a pilot valve member cooperating with the passageway to control flow therethrough, and a flexible skirt on the valve face defining a space therein subjected to outlet pressure and having an outer surface subjected to outlet pressure such that the skirt flexes inward with increased inlet to outlet pressure differentials.
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