Type Description

There are two types of pilot operated straight through valves with servo diaphragms and forced lifting devices, which are closed when there is no flow or opened when there is no flow. When the action mode A is in the closed state, the core will close the pilot hole under the action of spring force. Through a diaphragm orifice, medium pressure is formed above the diaphragm to close the valve. When connected, the core first opens the pilot hole. The closing pressure above the diaphragm is relieved, and the valve is opened by the medium pressure. To fully open the valve, the required differential pressure must not be less than 0.5 bar.

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