Electric High Inlet Three-way Valve

The electric three-way valve with high inlet is mainly used at the inlet and outlet of the high pressure heater in 50MW-60MW boilers, as a protective valve for the high pressure heater. During the operation of the high-pressure heater, when there is a leakage in the piping system or a failure of the drain valve, it can cause the water level on the steam side to rise, which can easily lead to high-pressure feedwater backflow into the turbine. To prevent accidents, when the water level on the steam side reaches the alarm level, the electric contact water level transmitter contacts and the quick opening and closing solenoid valve opens. The condensed water enters above the inlet valve piston, the inlet valve disc closes, and the feed water to the inlet high-pressure heater is cut off. At the same time, the bypass is opened, and the feed water enters the boiler through the bypass. The high-pressure heater is disconnected to ensure the normal operation of the unit. When the high-pressure heater is put into operation, the inlet valve clack automatically opens and cuts off the bypass under the action of the feed water Pressure in the system, and the feed water enters the boiler after passing through the high-pressure heater, so as to improve the thermal efficiency of the power plant and ensure the safe operation of the unit.