High pressure heater inlet three-way valve & outlet electric gate valve

used in boiler water supply systems of thermal power units. When the high-pressure heater is in normal operation, the spool of the inlet three-way valve is in the upper position, the main road is open, and the bypass is closed. The feed water enters the high-pressure heater from the main road. The spool of the outlet three-way valve is in the upper position, and the water supply passes through the outlet tee. valve to boiler. When the high-pressure heater fails, the liquid level control device detects that the liquid level is too high and outputs a signal to the control room. At the same time, the solenoid valve in the control system is energized to fill the upper chamber of the hydraulic cylinder of the actuator of the inlet and outlet three-way valve with liquid and pressurize it. At the same time, the pressure in the lower chamber of the hydraulic cylinder is released, and the valve disc moves downwards driven by the pressure difference between the upper and lower parts, closing the main circuit and opening the bypass at the same time until the inlet and outlet valves are completely closed, and the feed water enters the boiler through the bypass to complete the high boiler decomposition. When the inlet and outlet bypass valves are closed in place, the upper chamber of the hydraulic cylinder continues to maintain pressure to ensure safe and reliable operation of the bypass valve.
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