The WELLAIR® vacuum valve with discharge throttling device is ideal for deep well applications. Prevents float chatter and hammer, and reduces initial velocity of water column. AWWA Air/Vacuum Valves have a large orifice equal to the inlet size for discharging air in large volumes at low pressures, typically 2 psi. These style valves have not been designed for the greater surges seen in deep well applications, and should not be used in place of a Deep Well Air Release Valve. The Harvard Deep Well Air Release Control System Type HAE1 is designed to manage excess air in non-bladder style pressure tanks, ensuring system efficiency and preventing air discharge into service lines. Explore how Air/Vacuum Valves prevent pipeline collapse and manage air flow during filling and draining processes. The best way to protect your piping system from these negative conditions is to utilize Cla-Val air valves in the locations most likely to experience air or vacuum build-up: high-points in the pipeline, adjacent to pumps, in long pipe runs and at deep well installations. Well Service Valves are specifically designed to vent the air from the pump column during pump start-up in a controlled manner before the check valve opens to reduce pressure surges that result from the accelerating water column. All housings are tapped for use with a 1/4″ FPT gauge. Ready to Order? Deep Well Air Valves have an adjustable top which controls the velocity of air discharged from the valve. It also helps prevent chatter, and premature closure of the valve mounted on the discharge side of the pump. for collapsing to vacuum formation. The steeper of the uno structed two grades should be used. For the Collapsing closure Pressure of Pipe For-mula at right, a safety factor of 4 is used due to inconsistencies in the manufacture.