When the static pressure at the inlet of the safety valve reaches the set pressure, the position of the disc increases proportionally with the increase of the inlet pressure (not less than 1/4 of the bore diameter). The lift safety valve is suitable for equipment or pipelines of incompressible fluids with working temperature ≤300°C as an overpressure protection device.
Bonnet: The bonnet of the safety valve is open, allowing the spring chamber to communicate with the atmosphere, which is beneficial to reduce the temperature of the spring, and is mainly suitable for containers of high temperature gas in which the medium is steam and does not pollute the atmosphere.
Lever: The safety valve can be opened manually by the lever when the media pressure over 75% of the setting pressure (On the premise of ensuring safety).
Design: ASME, API 526, API 520, ASME B 16.5
Material: ASTM A216 WCB
Flange Pressure Grade: Inlet Class 1500 LB & Outlet Class 300 LB
Sizes Range: Inlet 3 Inch & Outlet 4 Inch
Inlet Temperature Range: -29 ℃ - + 427 ℃
Test and Inspection: API 527