Air Release Valves
Air Release Valves are essential pipe valves. No pipeline design can be completed without the use of Air Release Valves. The basic function of air release valve is to release air pockets. Air pockets collect at each high point of a full pressured pipeline. These buildups cause flow capacities to be reduced by 5-15% of designed flow. These reduced capacities are usually not noticed because air is invisible culprit.
Buying TipsSome factors to consider are as follows:
- Stainless Steel
- Carbon Steel
- Cast iron
- Plastic etc.
Air release valves are divided into two types:
- Single Air Release Valve
- Double Air Release Valve
An air release valve is a normally-open valve. This valve will remain open till your system is pressurized. Air is already present. As pressure increases within the system, unwanted air reaches the highest point in the system. When pressure inside the system exceeds the regular atmospheric pressure, air is expelled. As the flow rises, the poppet becomes buoyant and eventually closes. When pressure and liquid level drop, the air release valve will automatically re-open.
Uses of Air Release Valves:
- They are an inexpensive and positive method of preventing the formation of air pockets in pipelines because air pockets are a major cause of pressure surges and water hammer in pipelines.
- They are essential components for complete pipeline design.
- Air Release Valves are economical.
- They improve pipeline efficiency.
- Air Release Valves are the low cost insurance to protect expensive Pipelines and Pump Stations.
- They are automatic and kinetic for irrigation and commercial installations.
- Air release valves provide protection from pipeline collapse due to vacuum.
- They provide air bound pump protection.
- They are used for vacuum protection (pipe joints,gaskets,packing, etc.).