Working principle of the turbine extraction check valve
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Working principle of the turbine extraction check valve
They are asking for help; where is the information to be found...:L
Does the turbine have an air seal cooler?
Steam extraction check valves come in pneumatic and hydraulic types. Their basic working principle is that, during normal operation, the valve opens as the steam pressure in the pipeline overcomes the spring force as well as the weight of the valve itself. When the system activates its protection mechanisms, solenoid valves open the inlet valves for compressed air or liquid; this compressed air or liquid enters the piston at the top of the check valve, and under the combined action of the pressure of the gas or liquid and the spring force, the valve closes. There is also another type of steam extraction check valve, the swing-type, which opens due to the pressure of steam, while it closes as a result of the backflow pressure of the fluid in the pipeline and the weight of the valve element