What are the requirements for the installation and wiring of quick exhaust check valves for power stations?

What are the requirements for the installation and wiring of quick exhaust check valves for power stations?
The extraction check valve used in power plants is used on non corrosive medium pipelines such as steam and water in the extraction system of power plants or thermal power plants, or other systems. It prevents the pressure inside the turbine from suddenly decreasing when the turbine unit is loaded, and the steam in the extraction pipe and each heater from flowing back into the turbine, causing the turbine to break and damage the turbine generator. It also prevents water hammer accidents caused by leakage of the heater system pipeline from the extraction pipe into the turbine, in order to protect the safe operation of the turbine. As a device to prevent medium backflow, this valve can quickly and tightly close within 0.5 seconds, ensuring that when the water level in the feedwater heater is too high, the pneumatic device components receive a liquid backflow signal and quickly isolate the turbine, providing significant protection to the turbine or exhaust system.
The sealing surface of the exhaust check valve used in power stations is welded with Gr13 series stainless steel or cobalt based hard alloy, which has good wear resistance and stable and reliable sealing performance. When the medium flows forward, the intake air in the lower chamber of the cylinder works together with the heavy hammer to balance the valve disc in the fully open position. When the medium flows in the opposite direction, the lower chamber of the cylinder piston quickly releases pressure, and the valve disc quickly closes within 0.5 seconds.
The heavy hammer acts on the pin shaft through an extended rod and a fork to balance the heavy torque of the rocker arm and prevent water hammer from occurring. When the medium flows in the positive direction, it helps to open the valve and keep the valve [] grade stable and reduce vibration during operation. The function of the exhaust check valve used in power stations is to prevent the backflow of the medium in the pipeline. It also belongs to the category of check valves. The valve J that opens or closes by the flow and force of the medium to prevent the backflow of the medium is called a check valve. Power station check valve is a valve that can automatically prevent fluid backflow. The valve disc of the check valve opens under the action of fluid pressure, and fluid flows from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the valve disc automatically closes under the action of factors such as fluid pressure difference and its own gravity to prevent fluid backflow.
The installation of exhaust return valves for power stations should pay attention to the following matters:
1. Do not let the check valve bear weight in the pipeline. Large check valves should be independently supported to prevent them from being affected by the pressure generated by the piping system.
2. During installation, pay attention to the direction of medium flow, which should be consistent with the direction of the arrow marked on the valve body.
3. Lift type vertical disc check valves should be installed on vertical pipelines.
4. Lift type horizontal disc check valves should be installed on horizontal pipelines.
When installing exhaust check valves for power stations, it is important to follow the above precautions to prevent unnecessary injury or damage.