Plast-O-Matic Valves’ Series DGV valve is designed for corrosive applications subject to outgassing, such as sodium hypochlorite, hydrochloric acid, and ozone systems. The normally open valve has an internal float that pivots an arm and seal assembly as it rises and falls. When liquid fills the system, the float rises and the valve closes. As air or gas accumulates in the valve, it displaces liquid and allows the float to fall, re-opening the valve and releasing gas. The DGV has a ½” NPT process connection, and an 1/8″ NPT outlet. Valve body materials are offered in Geon PVC or Corzan CPVC, with EPDM or FKM (Viton) seals. The float is manufactured of natural polypropylene.