Provide all Thermoplastic [enter PVC, CPVC, Natural Polypropylene or PVDF] Degassing Valves, Series DGV, with size 1/2" Female NPT threaded system connection (for vertical orientation) and 1/8" Female NPT vent port. Seals will be [EPDM or FKM]. The internal float shall be constructed of Natural Polypropylene. Automatic Degassing Valve is to continuously vent gases for a liquid-carrying pipeline or vessel. This float operated valve will open when liquid level falls (indicating the presence of gas) and closes when the gas has been evacuated as the liquid level rises. The valve is to automatically vent gas collected over liquid to a pressure of 100 PSI. The specific gravity of the the liquid shall not be less than 0.9. All units are to be 100% individually tested at the factory as manufactured by Plast-O-Matic Valves, Inc., Cedar Grove, NJ.