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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 1/20 - 1/40 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 Closed bonnet is designed to prevent dust and fording matters from invading and meanwhile protect toxic combustible media from over flowing. The medium cannot leak out, mainly used for containers or pressure pipes with toxic, flammable and explosive gases.

Design: ASME, API 526, API 520, ASME B 16.5
Material: Stainless steel CF8M
Flange Pressure Grade: Inlet Class 600 LB & Outlet Class 150 LB
Sizes Range: Inlet 3 Inch & Outlet 4 Inch
Inlet Temperature Range: -268 ℃ - + 538 ℃
Test and Inspection: API 527