The Importance of Air Vent Valve- Zhejiang Huibo Valve Technology Co., Ltd.

Managing air in liquid piping systems has become essential for safe, efficient and cost-effective water supply and wastewater treatment. Today’s engineers are equipped with a range of special-purpose valves designed to help manage air in a variety of ways.

These valves work by releasing air pockets that develop in high points of a full pressurized pipeline and by preventing air surges that could cause damage to the piping system. They are installed at water mains, lateral end drip lines and transmission lines, on pump discharge side or before and after isolation or shut-off valves.

During startup, the majority of the air in a piping system is evacuated, but a small amount remains in the system. This air is a natural part of the process. It needs to be released during the first few minutes of operation to prevent the formation of a vacuum and to maximize the efficiency of a pipeline system.

A properly sized air release valve allows the flow of liquid to force out air bubbles that form in a piping system, which may become trapped inside the valve when it closes or when a tank is being filled. These valves are normally open, but close when the rising liquid lifts a float within the valve, causing it to close and vent the air in the system.

This valve is sized for air venting during start up or when a tank is being filled, and it should be mounted at high points in the system. It should also be sized to ensure that the valve remains open when the tank is depressurized.

Automatic Air Release Valves

Auto-releasing air release valves are sized to allow the flow of liquid to force out air bubbles when they form in a piping system, which are naturally occurring during operation. They are installed at the highest points of a pipe and will open and vent the accumulated air as soon as the liquid level drops below the orifice in the valve.

They are sized for air venting during start up, when a tank is being filled, or when a negative pressure occurs. They should be mounted at high points in the system, as well as the tank.

Advanced Air Release Valves

These air valves are sized to allow the flow or gas of liquid to force out air bubbles when it forms in a piping system, which are normally entrained or accumulated in high points of a system. They are installed at the highest points of the pipe and will open and vent the accumulated gas as soon as the liquid level drops below the valve’s orifice.