Valves used in Pipelines - TYPES OF VALVES - THE GLOBE VALVE PDF Print E-mail
Written by Norrie   
Sunday, 02 May 2010 18:18
Article Index
Valves used in Pipelines
TYPES OF VALVES - GATE VALVE
TYPES OF VALVES - THE GLOBE VALVE
TYPES OF VALVES - NEEDLE, ANGLE, PLUG, BALL, BUTTERFLY, CHECK VALVE
SAFETY RELIEF VALVES
VALVE ACCESSORIES
VALVE OPERATORS
All Pages

2. THE GLOBE VALVE (See Figure : 15)

The Globe valve is used where control of fluid flow or pressure is required and it can be operated in any position between open and closed.

A Globe valve may be constructed with a single or double port and plug arrangement. The double port type is generally used in a CONTROL VALVE where accurate control of fluid is required. Due to the double valve plug arrangement, the internal pressure acts on each plug in opposition to each other, giving an internal pressure balance across the plugs. (See Fig: 20 on page 42 – Control Valve)

This gives a much smoother operation of the valve and better control of the process. Some control valves are 'Reverse Acting'. Where a valve normally opens when the plug rises, in the reverse acting valve, the valve closes on rising. The operation of the valve depends on process requirements. Also depending on requirements, a control valve may be set to open or close, on air failure to the diaphragm.


Figure : 15