Patent ID: 8783645
Filing Date: 2014-07-22
Classification: F16K,Y10T

Abstract:
1. A valve system comprising: a valve chamber with an inlet and an outlet; a diaphragm dividing the valve chamber into a control chamber and a flow chamber connected with the inlet; a valve seat arranged in the flow chamber on a side of the outlet; a generally cylindrical valve body connected with the diaphragm and cooperating with the valve seat to modulate a flow from the inlet to the outlet and through the flow chamber, a first pilot valve located in a first bypass that extends between the outlet and the control chamber; a second pilot valve located in a second bypass that extends between the inlet and the control chamber; and a control unit for controlling the first and second pilot valves to selectively open or close the first and second bypasses thereby varying the flow through the flow chamber between a fully open and a fully closed condition.