Description The D-050 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. Product Features 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. Special orifice seat design: combination of bronze and E.P.D.M. rubber assures long-term maintenance-free operation. Available in flange sizes: 2"- 3". The 2” valve is also available with a threaded BSP or NPT connection. These valves are manufactured with flanged ends to meet any requested standard. Materials and Corrosion Protection Body and cover made of Ductile Iron ASTM A-536-60-40-18. Valve coating: fusion bonded epoxy coating according to standard DIN 30677-2. Other coatings are available upon request. Air Release Component: Body made of high strength composite materials. All operating parts are made of specially selected corrosion- resistant polymer materials. Application Range Working pressure range: 0.2-16 bar. Maximum operating temperature: 60°C. Maximum intermittent temperature: 90° C. For municipal and industrial liquid conveyance systems.
