Basic knowledge about valves

Basic knowledge about valves

In this opportunity we present you information about basic knowledge about valves.

Valves: Types and Uses.

Valves are the most important and indispensable industrial devices or instruments in the industry, which allow to regulate, control or prevent the circulation of fluids. These become part of an operation line that controls the total, partial or zero flow of a fluid.

In the market there are different types of valves, in general they can be classified according to their use, either to control the flow of liquids (hydraulic valves) or to control the flow of gases. In this occasion we will observe some of the most common types of valves and their applications, which will allow to expand the basic knowledge about valves.

Some types of valves used in the industry are:

  • Gate valve:
    The gate valve is the most basic type of valve and is the type of valve that works best completely open or completely closed, as it is not designed to regulate the fluid. It is distinguished by having a steering wheel that when rotated descends a gate in the shape of a wedge, which completely blocks the passage of the fluid. The gate valve is usually heavy and difficult to operate, since when operated manually, requires several turns to the steering wheel to descend completely the gate. It is a good option when you want an economical alternative in which the precision in flow regulation is not required.The gate valves are valves that are responsible for opening or lifting a gate or blade to allow the free passage of fluids. They differ by having a seal, which is achieved by the seat of the disk in two areas distributed. The gate or blade can be round or rectangular. The faces of the disc can be parallel or wedge-shaped.The gate is usually a wedge, when the valve is open wide the gate is completely located in the excess of the valve, this leaves an opening in the valve for the passage of the same size fluid of the pipe in which it is installed (there are full-pass gate valves and restricted passage), therefore there is little pressure drop or restrictions through the valve.
Gate Valve
Gate Valve
  • Ball Valve:

The ball valve, also known as the ball valve, is a very versatile type of valve because the lever should only be turned 90 degrees to quickly close or open the valve. This valve is widely used in the industry due to its ease of operation and small design. It is a good option when fluid regulation is not required, since this type of valve operates better totally closed or totally open, because when left partially open, over time, the fluid and its pressure will cause damage inside the valve.

Ball Valve
Ball Valve
  • Butterfly Valve:

The butterfly valve is characterized by its circular shape and the disc at its center. The lever is rotated 90 degrees to open or close the disc which in turn allows or blocks the passage of fluid. This valve is a good option for applications that do not require a lot of pressure and do not require regulation, because the butterfly valve also operates completely open or closed.

It is an excellent option for applications where the installation will be done in places with little space, or in process lines that do not resist too much weight.

Basically there are two types of butterfly valves:

Butterfly Valves axis centered:

Those with a centered axis have the body completely covered with an elastomer, normally EPDM and have the advantage that this is protected against possible corrosion of the transported fluid, in addition to being bidirectional.

Butterfly valves off axis:

Valves with this type of offset axis are used mainly in the petrochemical industry since conventional water services are not recommended. However they can make closures with fire safety (metal-metal) or used in regasification services (-200 ° C), these needs with the centered axis can not be covered.

Butterfly Valve
  • Check Valve:

The check valve is designed to prevent an inversion of the circulation. The circulation of the liquid in the desired direction opens the valve; when circulation is reversed, it closes. It is used to prevent the return of fluid in a line of operation; it has a sense of flow that opens it and a sense of opposite flow that closes it.

The check valve is a type of valve that allows flow in only one direction. This valve works by letting the flow of liquid or gas pass in one direction, but preventing the return of the same in the opposite direction. This is done through a flap, which with the pressure of the fluid in one direction is opened, but having pressed in the opposite direction closes. Check valves should be used in systems where there is a risk of back flow, as this can cause inefficiency in the process or even damage other instruments in the line.

Ckeck Valve
Check Valve

If you are looking for a specific valve for your project and have any questions or requirements, you can write to us at sales@ppspec.com or call us at the telephone numbers that appear in the contact section, and we will gladly assist you. Plumbing Products Spec has a wide range of valves at your disposal, because we work with the best brands, internationally recognized for their quality.

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