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Globe Valves

Introduction of Globe Valves?

The globe valve is used for throttling flow control. Shut off is accomplished by moving the disc against the flow stream rather than across it as in the case with a gate valve. The flow pattern through a globe valve involves changes in direction, resulting in greater resistance to flow, causing high pressure drop. The globe valve is an excellent valve to use for on-off service, but is highly suited for frequent cycling and control of fluids anywhere in amount or volume between the open and closed positions.

The globe valve must be installed in the proper relation to the media flow as indicated by the flow direction arrow marked on the valve body. This valve is considered uni-directional and must be installed with the pressure side or inlet under the seat.

Cast steel globe valves are highly efficient for services requiring frequent operation and throttling when pressure drop across the valve is about 20% of inlet pressure. 

Closer throttling, creating higher pressure drops may cause cavitation or excessive velocities which could cause high noise levels, vibration and possible damage to the valve or adjacent piping. Globe valves can be equipped with optional operators and are available with a variety of trims to match service requirements. 

Globe valves are supplied as standard with contour or spherical type plugs and are classified as quick opening on flow curves.  

Globe Valve Dimensions

Cast steel globe valve Class 150
Cast steel globe valve Class 300
Cast steel globe valve Class 600

Forged steel globe valve Class 150
Forged steel globe valve Class 300
Forged steel globe valve Class 600
Forged steel globe valve Class 900
Forged steel globe valve Class 1500

Globe Valve Standards

ASME B16.34 - Valves, Flanged, Threaded and Welding End
BS 1873 - Specification for steel globe and globe stop and check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
 
 
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