| 摘要 |
An improved, reverse-flow diaphragm valve assembly having a valve member encased within a valve housing including a base portion, having inlet and outlet ports, and a bonnet. The valve member is carried by a resilient diaphragm in a pressure chamber. In a preferred form, a solenoid actuated valve can command the movement of the valve member between closed position and open positions. A hand settable control piston and spring manage forces on the diaphragm, allowing the user to set the pressure drop across the valve. The control piston has an enlarged portion, preferably a flared flange, for providing support for the resilient diaphragm to help prevent wear and damage so to prolong the life of the diaphragm.
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