What is the purpose of the exhaust check valve?

Check valve is also known as reverse flow valve, check valve, back pressure valve, one-way valve. This type of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, and belongs to an automatic valve.

Application of exhaust check valve:

The extraction check valve is used in the extraction system of power plants or thermal power plants, or on the pipelines of non-corrosive media such as steam and water in other systems to prevent the pressure in the steam turbine from being suddenly reduced when the steam turbine unit is suddenly dumped, and the extraction pipe and the heating The steam in the device flows back into the steam turbine, causing the turbine blades to break and destroying the turbine generator, and preventing the leakage of the heater system pipeline and causing the water to enter the steam turbine from the steam extraction pipeline. safe operation. As a device to prevent the backflow of the medium, the valve can be quickly and tightly closed within 0.5 seconds, to ensure that when the water level of the feedwater heater is too high, the pneumatic device components receive the liquid backflow signal, and the steam turbine is quickly separated. Or the extraction system for protection. Check valves are generally suitable for clean media, but not for media containing solid particles and high viscosity.