8/15/2019 Types of Valves Summary

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Types of Valves Summary

Gate valves  are generally used in systems

where low flow resistance for a fully

open valve is desired and there is no need to

throttle the flow.

Globe valves  are used in systems where

good throttling characteristics and lowseat leakage are desired and a relatively high

head loss in an open valve is

acceptable.

Ball valves allow quick, quarter turn on-off 

operation and have poor throttlingcharacteristics.

Plug valves  are often used to direct flow

 between several different ports throughuse of a single valve.

Diaphragm valves  and pinch valves areused in systems where it is desirable for 

the entire operating mechanism to be

completely isolated from the fluid.

Butterfly valves  provide significant

advantages over other valve designs inweight,space, and cost for large valve applications.

Check valves  automatically open to allowflow in one direction and seat to prevent

flow in the reverse direction.

Stop check valve is a combination of a lift

check valve and a globe valve and

incorporates the characteristics of both.

Safety/relief valves  are used to provide

automatic overpressurization protection for 

a system.

Angle valves are globe valves in which the

inlet and outlet openings are at 90deg to one

another.

oot Valve

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