Combination Air Valve
Reclaimed water, Raw water, Desalination & Sea Water, Mines, Oil & Gas, Marine - Ballast Water, Food Industry, Power Plant Cooling.
25mm-50mm (1" - 2")
The D-021 combination air valve contains both an air & vacuum large orifice component and an automatic small orifice air release component in a single body. The valve is specially designed to operate with liquids carrying low concentrations of solid particles.
The dual feature combination air valve discharges and admits air (gas) during the filling or emptying of the system, and releases accumulated air (gas) from the system while it is operating under pressure.
Conical body shape
Designed to maintain the maximum distance between the liquid and the sealing mechanism and still obtain minimum body length.
Independent spring-guided linkage
Allows free movement of the float and rod. Vibrations and movement of the lower float due to turbulence will not unseal the upper float mechanism.
The rolling seal is less sensitive to pressure differential & provides smooth positive opening and closing. It accomplishes this by having a comparably large orifice for a wide pressure range.