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A valve is a device or natural object that regulates Professional

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Valves have many uses, including controlling water for irrigation, industrial uses for controlling processes, residential

uses such as on/off and pressure control to dish and clothes washers and taps in the home. Even aerosol spray cans have a

tiny valve built in. Valves are also used in the military and transport sectors. In HVAC ductwork and other near-atmospheric

air flows, valves are instead called dampers. In compressed air systems, however, valves are used with the most common type

being ball valves.






There are many valve designs, types and models, with a wide range of industrial applications, such as

Solenoid ValvePneumatic Pulse ValveExplosion Proof

Solenoid Valve
Namur Solenoid,

Solenoid Valve Parts,

Pneumatic ValveFluid

Solenoid Valve
, etc. All satisfy one or more of the functions identified above. Valves are expensive items, and it is

important that a correct valve is specified for the function, and must be constructed of the correct material for the process

liquid. Regardless of type, all valves have the following basic parts.. the body, bonnet, trim (internal elements), actuator,

and packing. The basic parts of a valve are illustrated in the image on the right.






Valve Body


The valve body, sometimes called the shell, is the primary boundary of a pressure valve. He serves as the main element of

a valve assembly because it is the framework that holds all the parts together. The body, the first pressure boundary of a

valve, resists fluid pressure loads from connecting piping. It receives inlet and outlet piping through threaded, bolted, or

welded joints. The valve-body ends are designed to connect the valve to the piping or equipment nozzle by different types of

end connections, such as butt or socket welded, threaded or flanged. Valve bodies are cast or forged in a variety of forms

and each component have a specific function and constructed in a material suitable for that function.






Valve Bonnet


The cover for the opening in the body is the bonnet, and it is the second most important boundary of a pressure valve.

Like valve bodies, bonnets are in many designs and models available. A bonnet acts as a cover on the valve body, is cast or

forged of the same material as the body. It is commonly connected to the body by a threaded, bolted, or welded joint. During

manufacture of the valve, the internal components, such as stem, disk etc., are put into the body and then the bonnet is

attached to hold all parts together inside.