UPVC air vent valve

UPVC flange exhaust valve in the large inlet and outlet of the low-pressure intake and exhaust components ensures that the air flows in and out of the high-speed exhaust gas with high flow. UPVC flange exhaust valve and even the high-speed air mixed with water mist will not seal the exhaust port in advance, resulting in air sealing. The exhaust port of UPVC flange exhaust valve will only be closed after the air is completely discharged, Whenever the internal pressure of the system is lower than atmospheric pressure, for example, plastic vacuum exhaust valve will immediately open to intake air into the system to prevent vacuum in the system. At the same time, when the system is empty, timely intake air can accelerate the evacuation speed, and the exhaust process is stable. UPVC flange exhaust valve can prevent pressure fluctuation or other destructive phenomena. UPVC flange vent valve

UPVC flange exhaust valve can timely discharge the air accumulated at the high point in the system when the system is under pressure, so as to avoid the following phenomena that may cause harm to the system: the accumulation of air will cause air resistance or air blockage; plastic vacuum exhaust valve will increase the head loss of the system, reduce the flow, and even cause complete interruption of fluid transmission in extreme cases, Or cause the following phenomena. UPVC flange exhaust valve adopts positive pressure exhaust and negative pressure air intake design, UPVC flange exhaust valve has exhaust and air intake functions, plastic vacuum exhaust valve automatically discharges a small amount of air accumulated in the pipeline under pressure, UPVC flange exhaust valve negative pressure air intake can discharge the air in the pipeline when the air pipeline is filled with water and automatically intake when the pipeline is empty, Especially under the condition of water column separation, it will be opened automatically, and air will be introduced into the pipeline to eliminate the vacuum.

Working principle of UPVC flange exhaust valve:

1. The working process of UPVC flange exhaust valve when the air pipe is filled with water:

1. The UPVC flange exhaust valve fully discharges the air in the pipeline to make the water filling smoothly.

2. After the air in the UPVC flange exhaust valve pipe is emptied, the water enters the exhaust valve, the floating ball rises under the buoyancy, and the inlet and outlet are sealed.

3. The UPVC flange vent valve will then collect the gradually accumulated air in the system at the high point of the system, i.e. in the air valve, replacing the original water in the valve body.

4. As the air accumulates in the UPVC flange exhaust valve, the liquid level in the valve drops, so does the float ball. Pull the sealing chain (only the vacuum valve is available), open the automatic exhaust port, and release the air.

5. After the air is discharged by the UPVC flange exhaust valve, the water enters the air valve again, floats the floating ball and seals the exhaust port.

6. The above steps 3, 4 and 5 will continue to circulate with the system running

2. Working process of plastic vacuum exhaust valve when the pressure in the system is lower than atmospheric pressure (negative pressure is generated)

1. The float ball of the plastic vacuum exhaust valve will immediately fall down and open the low-pressure air inlet and outlet.

2.The air enters the system to eliminate the negative pressure, and the UPVC flange exhaust valve acts as the protection system.