| 摘要 |
The invention relates to an electric-control valve for regulating flow of fluid, wherein the water diaphragm front and rear chambers are provided between the inlet and the outlet conduits. The main stream of water flows from the inlet conduit into the outlet conduit through the water diaphragm front chamber and the branch stream of water flows from an auxiliary regulating chamber into the outlet conduit through the water diaphragm rear chamber and a regulating chamber controlled by rotary type electromagnet. The flow of fluid can be regulated continuously and a water heater can be started at a predetermining flow without being subject to the influence of water pressure change and occurring of heating without water according to the output of electric signal of a rotary flowmeter provided in the conduit. The advantages of the invention reside in regulating rapidly, high accuracy of constant flow and the wide range of water pressure, in addition, the invention has better reliability and safety.
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