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Saturday, November 19, 2011

Valves - Typical Operating Ranges





Different types of valves and their operating ranges: 

The table below can be used as an indication of the different valve types and typical operating ranges.

Type of Valve
Minimum Size
Maximum Size
mm
inches
mm
inches
Ball
6

1220
48
Butterfly
50
2
1830
72
Butterfly Neck
25
1
1830
72
Gate
3
1/8
1220
48
Globe
3
1/8
760
30
Plug Lubricated
6

760
30
Plug non lubricated
6

406
16
Swing Check
6

610
24
Swing Check Y-type
6

150
6
Lift Check
6

250
10
Tilting disc
50
2
760
30
Diaphragm
3
1/8
610
24
Y Oblique
3
1/8
760
30
Slide
50
2
1900
75
Pinch
25
1
305
12
Needle
3
1/8
25
1

Article Source :www.engineeringtoolbox.com

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Classification of Valves





Categories of Valves
Application Description
Flow regulating valves
For controlling rate of flow.
Temperature regulating valves
For controlling fluid temperature in a system.
Automatic process control valves
For controlling rate of flow relative to value.
Anti vacuum valves
An automatic type of air valve preventing the formation of vacuum in tanks or pipelines.
Blow down valves
A valve which is used for cleaning sludge from a boiler.
Bulkhead valves
A gate valve.
Free ball valves
A valve in which a ball is free to rotate in any direction.
Fusible link or fire valves
A fire prevention valve which has a weighted lever hold open by a wire and fusible link which melts at an increase of room temperature.
Hydraulic valves
A control valve for water, oil, or hydraulic systems.
Jet dispersal valve
A valve incorporating an element by virtue of which the energy within the emitting jet is dissipated.
Penstock
A single faced type of valve consisting of an open frame and a door and used in terminal positions only. Normal located in tanks or channels for controlling flow in to a pipe.
Plate valves
A gate valve incorporating a sluicing effect.
Radiator valves
A valve controlling the flow of water through a radiator.
Rotary slide valve
A valve in which a rotation of internal parts regulates flow by opening and closing a series of segmental ports.
Rotary valve
A spherical plug valve in which the plug, which rotates through 90o.
Solenoid valve
A valve operated by by an electrical solenoid.
Spectacle eye valve
A parallel slide valve.
Thermostatic mixing valve
A valve which combines temperature.
Throttle valve
A non tight closing butterfly valve.

Article Source : www.engineeringtoolbox.com

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Basics of Instrumentation & Control


To view more posts on BASICS : CLICK HERE

Pressure


To view more posts on PRESSURE : CLICK HERE

Flow


To view more posts on FLOW : CLICK HERE

Level


To view more posts on LEVEL : CLICK HERE

Temperature


To view more posts on TEMPERATURE : CLICK HERE
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