Durgo Safety Valve, or Pressure Relief Valve, type SV77 (GT-77) can be used in pressurised systems with e.g. water and oils. The valve housing, nipple and cone are in dezincification resistant brass with seal material of fluorinated rubber (FPM/FKM) or EPDM. Durgo Safety Valves are Class 4 categorized and CE labelled in accordance with the Pressure Equipment Directive (PED 2014/68/EU). The valve is delivered with compression coupling outlet as standard but is also available with outlet DN20 male thread (ISO-G), change CU22 to G20 in article number.