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Type of Pipes Tubes
Types of Valves used in Piping April 01, 2021
Valve A valve is a mechanism that opens and
closes to control the flow of fluids. In a
scientific context, fluids include both liquids
and gases. It is a device that is able to
control, shut off, direct, or regulate the flow
inside a pipeline by obstructing its flow
direction, partially or completely, depending on
the type of application Valves can also work
through pressure or temperature and maybe run by
a motor or operated manually. The simplest valves
are one way-flap mechanism that allow flow in one
direction and shut with back-flow pressure to
stop flow in the direction of origin.
Types of Valves In piping following types of
valves are used depending on the requirements.
The cost of Valve in the piping system is up to
20 to 30 of the overall piping cost. And the
cost of a given type and size of the valve can
vary 100.

• Gate Valve
• Globe Valve
• Check Valve
• Plug valve
• Ball Valve
• Butterfly Valve
• Needle Valve

BALL VALVES
A Ball valve is a quarter-turn rotary motion
valve that uses a ball-shaped disk to stop or
start the flow. Most ball valves are of
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the quick-acting type, which requires a 90 turn
of the valve handle to operate the valve. Our
company makes exact designed ball valves which
are accessible in two ways, three-way and
four-way ball valves. All our ball valves have a
high steam execution level without steam spillage
and are intended for better outflows control.
CHECK VALVES
The check valve prevents backflow in the piping
system. The pressure of the fluid passing through
a pipeline opens the valve, while any reversal
of flow will close the valve. Check valves, which
is a mechanical gadget that typically permits
liquid to move through it in one direction. There
are two port steel check valves that have two
openings in a body one for the liquid to enter
and the other for the liquid to take off. We
give shifted scope of the cast steel check valves
which are very tough and practical
GATE VALVES
A gate valve is the most common type of valve in
any process plant. It is a linear motion valve
used to start or stop fluid flow. In service,
these valves are either in a fully open or fully
closed position. Gate valves are used in almost
all fluid services such as air, fuel gas,
feedwater, steam, lube oil, hydrocarbon, and most
any other services. Gate valves consist of flat
closure element which slides into the flow stream
to provide the shut-off and these are linear
motion valves. Gate Valves is also known as the
knife valves and slide valves. The door valves
minimize the weight drop over the valves in the
completely opened position and it totally stops
the stream of the fluid. The benefit of the gate
valves and the knife valves is that their
application in slurries permits the entryways to
slice directly through the slurry. A gate valve
functions by moving a wedge-shaped disc
obstructer up and down to open and close the flow
path through the valve. This linear motion is
provided by a threaded rising stem. Turning this
threaded stem requires multiple revolutions
(multi-turn) to travel from open to close.
Ball and Gate valves are commonly used in home
water pipelines. Note that the type of handle
(green lever or red hand wheel) may change
however, lever handles are normally only used
with quarter-turn valves. Garden hose valves are
typically gate valves, so the flow of water can
be controlled.
GLOBE VALVES
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Globe valve is used to stop, start, and regulate
the fluid flow. Globe Valves are used in systems
where flow control is required and leak
tightness is also necessary. Globe valves operate
by having a convex disc-shaped plug raise and
lower via a rising stem into a circular seat
around the inside of the globe shaped body at
the equator. These globe valves are useful for
flow control or on/off isolation of fluids and
these are manufactured from the superior quality
of the raw material.
PLUG VALVES
Plug valves that allow the attachment to turn all
through its position lessening the scrapping or
rubbing. It obliges the varied commercial
enterprises which comprise of food and pharma,
paper, material, sugar, power, oil and gas. Some
of its features are highly durable, low
maintenance cost, resistant to corrosion which
makes its best utility in industries. Plug valve
is a Quarter-turn rotary motion Valve that uses a
tapered or cylindrical plug to stop or start the
flow. The disk is in a plug shape, which has a
passage to pass the flow. Plug valve used as
on-off stop valves and capable of providing
bubble- tight shutoff. Plug valve can be used in
a vacuum for high-pressure temperature
applications The basic construction of a plug
valve is practically identical to that of a ball
valve with the exception of the shape of the
obstructer used.
NEEDLE VALVES
Needle valves are similar to a globe valve in
design with the biggest difference is the sharp
needle-like disk. Needle valves are designed to
give very accurate control of flow in small
diameter piping systems. They get their name from
their sharp-pointed conical disc and matching
seat. BUTTERFLY VALVES
The butterfly is a disk connected to a rod. It
closes when the rod rotates the disc by a quarter
turn to a position perpendicular to the flow
direction. When the valve opens, the disk is
rotated back to allow the flow Butterfly valves,
which can be used for special applications like
isolation, throttling and control. Butterfly
valves are suitable for fluids like air, water,
toxic gases, vacuum, acid, chemicals, LPG,
slurries a combination of gases and
solid. Butterfly valves can be used to limit
flow they are typically used as on/off valves.
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Advantages and Disadvantages of using a Butterfly
Valve Advantages In the bigger sizes, butterfly
valves are lighter, smaller, and cheaper than
competing Globe, Gate, Ball, and Plug
valves. Butterfly valves most often compete
against Ball valves in the smaller
sizes Disadvantages Butterfly valves are not
pluggable, because the disc intrudes into the
pipeline. Pigging a pipeline occurs when you
send a device (often foam) through the pipe to
clean it. The disc will reduce the amount of
flow going through the pipeline. Other types of
valves (Ball, Gate, etc.) do not have this issue.
Conclusion In this blog, I have tried to
explain the term Valve. and their different types
of valves with their functions.
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