high quality vent valve on sale

Vent valve is actually an ordinary valve, what style has. The name comes from its operation. Its function is to discharge pressurized gas or liquid through it during non-working hours or emergency situations to avoid other accidents. Hence the name “exhaust valve”. The principle is that after the machine is closed, the intake valve disc is closed, and the air path of the exhaust valve is opened and then eliminated.

the working principle of the vent valve

In this application, the high-temperature main steam is bypassed to the atmosphere and the pressure and temperature rise to a certain point when the HRSG ignition begins. High noise and vibration can occur in the valve and downstream pipe because the control valve is under full pressure differential. Therefore, current limiting devices (such as diffusers or silencers) are usually installed downstream. This design provides back pressure to the valve to limit pressure drop and subsequent noise and vibration. It can also be used to reduce noise before introducing the system into the atmosphere. Noise requirements for control valves are usually 85 dB. In some cases, insulation may be used to meet noise requirements. However, in many applications, downstream pipeline valves do not have any insulation. However, depending on the location of the plant, the noise requirement for the fence is usually 60 dB. In addition to noise and vibration, another problem is tight closure. Since these valves are usually used in startup or plant trip situations, they must remain closed during normal operation. If the valve leaks significantly, steam will be lost. In many cases, the loss of steam is enough to affect turbine performance guarantees.