Pressure Seal Globe Valve

African Valve supplies pressure seal globe valves in Algeria for high-pressure and high-temperature services, particularly in power plants, steam systems, refineries and petrochemical facilities.

The main difference from a conventional bolted-bonnet globe valve is the bonnet sealing arrangement. A pressure-seal design uses an internal sealing ring, with system pressure helping maintain the seal as operating pressure rises.

Engineering Design & Operation

The valve itself works in the same basic way as other globe valves. A disc moves toward or away from the seat, changing the flow opening and allowing throttling or shut-off.

The pressure-seal bonnet uses an internal sealing arrangement rather than relying on a conventional bolted bonnet joint for the primary pressure seal. This construction is commonly chosen for demanding pressure and temperature conditions.

Manual handwheels and gearboxes can be used for operation, while pneumatic and electric actuators are available for automated systems.

Technical Specifications

Testing & Standards

Depending on construction, applicable requirements may include BS 1873, API 623, ASME B16.34, ASME B16.10, ASME B16.5, ASME B16.25 and API 598. Inspection may include pressure testing, leakage testing, dimensional checks, PMI and functional testing.