About Double Orifice Air Release Valve:
A double orifice air release valve is a type of valve used in pipelines to release air and other gases that may accumulate in the system. It has two orifices, one for air release and the other for vacuum relief. The air release orifice is used to release air from the pipeline when it is filled with water, while the vacuum relief orifice is used to allow air to enter the pipeline when there is a vacuum created due to water flow or other factors. This valve helps to prevent damage to the pipeline by maintaining the proper pressure and preventing air pockets from forming.
Double orifice air valve that combines both large orifice & small orifice functions within one unit.The large orifice allows air to be expelled from the system during filling of a pipeline and admit air back into the system whenever sub-atmospheric pressure occurs.Air is vented from the system until water enters the valve and lifts the float against its seat,ensuring a tight seal.In the event of sub-atmospheric pressure in the system,the water level drops causing the float to fall from its seat and allow the admission of air.
During normal working of the main the small orifice releases the air which accumulates under pressure.With the main in operation,the float is normally against its seat.As air enters the chamber body the water level is depressed until a level is reached when the float drops form its seat,whcih allows air to escape.The consequent rise in water level returns the float to its seat.
A ductile iron double orifice air release valve is a type of valve used in water distribution systems to release air from the pipeline. It is designed to prevent air pockets from forming in the pipeline, which can cause problems such as reduced flow, increased pressure, and damage to the pipeline.
The valve is made of ductile iron, which is a type of cast iron that is more flexible and durable than traditional cast iron. This makes it more resistant to cracking and breaking under pressure, which is important in water distribution systems.
The double orifice design of the valve allows for air to be released from both the top and bottom of the valve, which helps to ensure that all air pockets are removed from the pipeline. This helps to maintain a consistent flow of water and prevent damage to the pipeline.
Overall, the ductile iron double orifice air release valve is an important component of water distribution systems, helping to ensure that water is delivered efficiently and reliably to consumers.