A.R.I. D-021 Combination Air Valve for Reclaimed and Non-Potable Water

The D-021 air valve is a versatile product that combines an air and vacuum large orifice with an automatic small orifice in one unit. It is specifically designed to function with non-potable water, such as reclaimed and effluent water. The valve has a triple function; it discharges air during system filling, admits air during drainage and water column separation, and releases accumulated air in pressurized systems. Its unique "air gap" design ensures separation of liquid from the sealing mechanism, providing optimal working conditions.   Product Features Specially designed to operate with liquids carrying solid particles such as reclaimed water and effluents. Unique "air gap" design enables the separation of the liquid from the sealing mechanism and assures optimum working conditions. Combines the features of both an air & vacuum valve and an air release valve. Triple function: Air & vacuum component discharges large volumes of air during filling of the system. Air & vacuum component admits large volumes of air during drainage and at water column separation. The air release component releases entrapped air in pressurized systems. Flexible rolling seal provides smooth positive opening, closing, and leak-free sealing. Available 25mm – 50mm (1"& 2") with a threaded BSP or NPT connection. Available in flange sizes: 25mm – 50mm (1"- 2"). These valves are manufactured with flanged ends to meet any requested standard. Materials and Corrosion Protection Valve body is made from corrosion-resistant composite materials. Internal metal parts are made of corrosion-resistant stainless steel. Floats are made of corrosion-resistant composite materials. Flange is made of corrosion-resistant composite materials. Application Range Working pressure range: 0.2-10 bar. Maximum operating temperature: 60°C. Maximum intermittent temperature: 90° C. Additional one-way options for air intake/discharge. Application media include reclaimed water, raw water, effluent water, water with suspended solids and coolant water.