Plast-O-Matic Valves, Inc. has developed an all-thermoplastic, automatic continuous degassing valve. The Series DGV was developed specifically 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. The unique assembly of O-rings is used to energize the arm and control the pivoting action. This patent-pending design is what gives Series DGV the capability to open repeatedly, yet seal bubble-tight as soon as liquid is present. The DGV has a 0.5-inch NPT process connection and a 1/8-inch NPT outlet and is offered in Geon PVC or Corzan CPVC, with EPDM or FKM (Viton) seals.