Full Lift Pressure Safety Valve

Overpressure conditions can develop rapidly in pressurized systems handling steam, gases, or compressible fluids. A Full Lift Pressure Safety Valve is engineered to open rapidly once the preset pressure is reached, allowing maximum discharge capacity in the shortest possible time. This quick full-lift action helps protect pressure vessels, boilers, pipelines, compressors, and process equipment from excessive pressure while ensuring compliance with international safety standards. African Valve is a Prominent Full Lift Pressure Safety Valve Manufacturer in Africa, manufacturing and supplying Full Lift Pressure Safety Valves in various material grades, pressure classes, end connections, and pressure settings for projects across Nigeria, Egypt, South Africa, Kenya, Ghana, and other African countries, along with international export destinations.

What Is a Full Lift Pressure Safety Valve?

Full Lift Pressure Safety Valve is characterized by attaining maximum lift very quickly upon exceeding of the system pressure the calibrated set pressure. Contrary to other pressure relief devices which slowly open up, this valve opens up very fast and allows huge volumes of steam/gas to be vented off very quickly. As soon as the pressure drops below the blowdown pressure, the spring pushes the disc to close the orifice to create a perfect seal.

Valve Construction

The valve incorporates a body, nozzle, disc, spring assembly, spindle, bonnet, adjusting screw, and guide components. The compression of the calibrated spring determines the opening pressure, while the specially designed nozzle and disc arrangement create the full-lift action. Depending on application requirements, the valve can be supplied with open or closed bonnet designs, lifting levers for testing, balanced bellows for back pressure compensation, and soft or metal seating arrangements.

Materials & Construction

The valve is manufactured using:

• Carbon Steel – ASTM A216 WCB

• Stainless Steel – ASTM A351 CF8 / CF8M

• Chrome Moly Alloy Steel – ASTM A217 WC6 / WC9

• Duplex Stainless Steel – ASTM A995 Grade 4A

• Bronze – ASTM B62

Construction features include:

• Full Lift Spring Loaded Mechanism

• Precision Machined Disc and Nozzle

• Adjustable Set Pressure

• Blowdown Adjustment Ring

• Balanced Bellows Design (Optional)

• Open or Closed Bonnet Configuration

• Flanged, Threaded, and Butt Weld End Connections

Technical Specifications

• Size Range: DN15 to DN300 (½" to 12")

• Pressure Ratings: Class 150, 300, 600, 900, 1500

• Design Standards: API 526, ASME Section VIII, ASME B16.34

• Testing Standard: API 527

• End Connections: Flanged, Threaded, Butt Weld

• Operation: Spring Loaded

Industrial Applications

Full Lift Pressure Safety Valves are widely used in:

• Steam Boilers

• Pressure Vessels

• Steam Distribution Systems

• Gas Processing Facilities

• LNG Installations

• Petrochemical Plants

• Power Generation Plants

• Process Industries

Product Features

• Rapid full-lift opening for maximum discharge capacity

• Accurate pressure protection for critical equipment

• Stable reseating after pressure reduction

• Available with balanced bellows and lifting lever options

• Suitable for steam, gas, and compressible fluids

• Manufactured according to internationally recognized engineering standards

Manufacturing & Inspection

Full Lift Pressure Safety Valves are manufactured according to international engineering standards and customer project specifications. Every valve undergoes dimensional inspection, hydrostatic shell testing, seat leakage testing, set pressure calibration, blowdown verification, functional testing, and final inspection before dispatch. Material Test Certificates (MTC), pressure calibration reports, inspection records, and supporting documentation are available to satisfy engineering, procurement, and project compliance requirements.

Supply Across Africa

African Valve supplies Full Lift Pressure Safety Valves to power plants, oil and gas facilities, petrochemical plants, LNG terminals, boiler systems, and processing installations throughout Nigeria, Egypt, South Africa, Kenya, Ghana, and other African countries. Valves are available in multiple material grades, pressure classes, end connections, and pressure settings to meet project-specific overpressure protection requirements.