These are small devices that control the flow of a fluid which can be gases or liquids.

1. Valves and Their Different Types
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Valves are commonly used for all types of process control applications. These are small devices
that control the flow of a fluid which can be gases or liquids. Valves are used in several
applications such as controlling the flow of water for irrigation, controlling processes in
industries, for residential purpose like pressure control for dish and cloth washers as well as for
taps. Apart from industrial use, these are also used in transport and military sectors. These are
found in almost all kinds of industries whether it is food manufacturing, mining and power
generation and processing of chemical and plastic manufacturing.
Depending on the usage and applications, varieties of valve types are available in the market
with the main purpose to regulate or turn and off the flow of gas and liquid. These valves are
widely manufactured with the exotic alloy, plastic and metal. To be very frank, it is very
important to select the appropriate valve for performing such functions perfectly.
Hydraulic, Manual, Motor, Solenoid, and Pneumatic are some common types of valves. Basically
these valves are classified by how they are actuated. High pressure valves are suitable for
controlling pressure for steam, oil and gas production and very high pressure applications like
hydraulics etc. In addition there are some mechanical valve exist that are widely used in mining
and water sewage industries and oil and gas industry. These are further classified into different
types such as Ball, Check, Needle, Gate, Globe, Butterfly, Poppet, Plug, Diaphragm and Pinch.
Some of the above valves are considered as industrial valves like Ball, Plug and Butterfly. These
valves have a path for flow such as for ball valve, ball shaped disc with a hole, for plug, a
cylindrical hole bored through and for butterfly wind like disc are important for the entire
process. With the help of these internal mechanism rotations the flow of gas or liquid is
allowed. In addition the Globe and Gate valves are also very popular to shut the flow on or off
immediately which results in the requirement on the leakage proof should be effectively
ensured. Other practical ways can also be implemented such as to avoid fluid hammer effect
great valves would adopt the wedge edge design.
Furthermore for high purity applications, diaphragm and pinch valves are commonly used as
they have helpful path for flow. The solid fluids can be used in these types of valves because the
flexible diaphragm and straight flow path of pinch valve would help mechanically for flexible
membrane.
These all kinds of valves are some basic but there are other kinds of valves also available that
varies for its design and usage like proportioning valves and vacuum delay valves.

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