The D-040 series Combination Air Valve has the features of both an air release valve and an air & vacuum valve.The air release component is designed to automatically release small pockets of air to the atmosphere as they accumulate along a pipeline or piping system when it is full and operating under pressure.The air & vacuum component is designed to automatically discharge or admit large volumes of air during the filling or draining of a pipeline or piping system. This valve will open to relieve negative pressures whenever water column separation occurs.
Features
Maximum intermittent temperature: 194° F.
Due to its light weight, the valve may be installed on plastic piping systems, as well as other lightweight piping systems.
Reliable operation reduces water hammer incidents.
Lightweight, small dimensions, simple and reliable structure.
Dynamic design allows for high capacity air discharge while preventing premature closure.
The large size of the automatic air release orifice relative to the air valve body: Discharges air at high flow rates; Lessens the danger of its obstruction by debris; Enables the usage of the rolling seal mechanism, making it less sensitive to pressure differential than a direct float seal.
The body is made of high-strength composite materials and all operating parts are made of specially selected, corrosion- resistant materials.
Working pressure range: 3 - 250 psi.
Testing pressure: 360 psi.
Maximum working temperature: 140° F.
The discharge outlet enables the connection of a vent/drain pipe.
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