Marine Type Approvals held for these valves: American Bureau of Shipping, Bureau Veritas, DNV, Germanischer Lloyd, Lloyds Register.

Angular shaped spring loaded overflow valves made of gunmetal with stainless steel spring – externally adjustable.

Suitable for the protection of pumps against overloading in closed circuits for neutral/non neutral, nonsticking liquids and for the control of systems under pressure for neutral / nonneutral gases and vapours and – depending on the sealing material – also for steam. with bellows without lifting device.

Available models:853 bGFO with bellows, for gases and liquids without lifting device.

Available seals: NBR, EPDM, FKM, PTFE, FFKM.

Valves can be delivered unset within a pressure range or set and sealed at the factory.

Series also available in Stainless Steel: Series 453. Series 853 (Gunmetal): Model 453bGFO