Comparison between Different valves on the basis of their motion, such as Motion, Cv, Operation Limitations, throttling , Pressure Drop etc.

1. S.M. Taha Rehman Siddiqui Institute of Chemical Engineering & Technology University of the Punjab
Valve/
Characteri
stics
Globe Valve Gate Valve
Diaphragm
Valve
Butterfly
Valve
Ball Valve Plug Valve Needle Valve
Check
Valve
Pinch Valves
Solenoid
Valves
Diagram
Symbol
Motion Linear Motion
Linear
Motion
Linear
Motion
Rotary
Motion
Rotary Motion Rotary Motion
Linear
Motion
Depends
upon
Stopping
Element
Linear
Motion
Linear
Motion
Pressure
Drop
High
Less than
Globe
Very Low
Resistance
to Flow
Low Low
Very Little
Resistance to
Flow
Low Low ΔP
Very Low
Resistance
to Flow
N/A

2. S.M. Taha Rehman Siddiqui Institute of Chemical Engineering & Technology University of the Punjab
Throttle Recommended
Maybe but
not suitable
Primarily it
is a
Throttling
Valve; Can
be
Used as Stop
Valve
Can be Used for
Throttling
(Fluid Should be
Non-Abrasive)
Not
recommended
for throttling
Can be used N/A
Fully
Open or
Closed
Control
Element
Disc Gate Diaphragm Disc Ball Plug Gate/Needle
Disc/Ball/L
ift Check
Polymer Gate
Coefficient
of Valve
Cv
Low
High as No
constriction
in Flow
High
N/A,
As Shut
On/Off
Valve
Operating
Time
Not suitable for
quick operation.
Not suitable
for quick
operation.
Not
suitable for
quick
operation.
Circular disc
used for
quick
opening/clo
sing
Quarter Turn
Valve.
Quick
Opening/Closing
Quarter Turn
Valve.
Quick
Opening/Closing
Not suitable
for quick
operation.
Quick
Opening
as only
flow is
require to
open
Not suitable
for quick
operation.
Electric
Operated.
Quick
Shut
Off/On
Operating
Limitation
(T/P)
High Pressure
usage
Not
recommend
ed for high
pressure
Temperature
Limitations in
Lined and
Soft Seated
Valves
Temperature
Limitations When
Seat Ring is Non-
Metallic
Used for
both
high/low
pressure
N/A
Operating
Limitation
(Materials)
Not
Recommended
for Dirty Fluids
or Slurries
Use
Anywhere
Can be used
for all types
of fluid and
Slurries
Not suitable
for
crystallizing
and caking
medium
Almost all Fluids
and Slurries can
be handled
Almost all Fluids
and Slurries can
be handled
Not
Recommended
for Dirty Fluids
or Slurries
Slurry
Material
could
stuck to
seat