Valves: Definition, Its Function, Classifications, Advantages & disadvantages

Valves plays important role in any manufacturing industries. It is the most important mechanical device that is used in small, medium and large scale industries. The industry that manufactures valves and its components to other industries is often called valve manufacturing industry. 

Definition of Valve

A valve, in mechanical engineering, is a device that controls the flow of fluids (liquids or gases) in a pipe or other closed area.

Function of Valve

•  The suspension and start of the flow of liquid or gas is the responsibility of the Valve.
•  Reduce or increase the flow of gas or liquids.
•  Controlling the flow of gas, liquids.

Major Components of Valve

· Hand wheel:-A hand wheel is usually required to use the valve by hand, when starting a process or in an emergency; or sometimes a hand wheel is used to limit valve movement.

· Stem:- The valve stem is an automatic valve that opens the gas chamber (such as air to inflate the tire), and then automatically closes and is kept closed at room pressure, or spring, or both, to prevent gas from escaping.

· Packing Rings:- Control Valve Packing is a marking system that usually has a defective object, in the form of solid or separated rings contained in a packing box. The packaging materials are pressed to provide a signal of active pressure between the liquid in the valve body and the outside air.

· Bonnet:-A meeting that includes the part where the stem of the plug goes with the ways to book a leaky block near the stem. The frequency provides the mechanisms for installing the actuator. Leak markings can be obtained by packing or spraying.

· Body:- The valve body, sometimes called the shell, is the main boundary of the pressure valve. It serves as a key part of the valve organization because the structure keeps all the components together. The body, the first pressure limit of the valve, withstands a lot of pressure loads on the pipe connection.

· Gate:- A gate valve is usually used to completely close the flow of liquid or, in a completely open area.

· Gate Seats:- Gate valve has two seats that protect the signal through the gate. The gate valve has two seats that make a mark on the gate. Like ball valve seats, a seal can be constructed with an O-ring, a double solid insert or a metal seal.

Classification of Valves

·         Classification on the basis of Isolation: Gate valve, Plug Valve, Piston Valve Diaphragm valve, Butterfly valve, Pinch Valve.

·         Classification on the basis of Regulation:- Globe, Needle, Butterfly, Diaphragm, Ball, Plug Pinch.

·         Classification on the basis of Safety Relive Valve: Pressure relief, Vacuum relief.

·         Classification on the basis of Non return: Swing, Lift check valves

·         Classification on the basis of Special purpose: Multi port, Float, Knife gate, Line Blind valves.

Advantages of Butterfly Valves

· Turns Quarterly

· Has Open port

· Used with chemical or corrosive Material

· Integrated, lightweight design

· Available in larger sizes

· Drop in low pressure and recovery in high pressure

· High flow coefficient

Disadvantages  of Butterfly Valves

·         It is difficult to clean

·         Problem due to slurries

·         Throttling or Folding limited to low differential pressure

·         cavitation and possible congestion

·         Unguided disc movement is affected by flow turbulence.

Conclusion: We should select the right valve in setting up of industry. The right choice becomes essential as different types of valves have their own advantages as well as disadvantages. Mangal Steel Castings is the renowned Valve manufacture in Rajkot, Gujarat, India that manufactures valve and valve components for small scale industry, medium scale industry as well as large scale industry.

In case you want to install Valves in your manufacturing industry then you can contact sales team of Mangal steel castings now.