Usage for potable & filtered water
Large orifice air valves allow 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.
25mm (1”) – 200mm (8”) sizes.