Stainless Steel Check Valve

We are professional on valves, fittings and water meters, own 5 factories in China. In addition to valves, pipe fittings and water meters, WESDOM is also committed to the development of piping relating products in order to provide customers with more convenient services. Now WESDOM is not only a valve manufacturer, but also an industrial piping solution provider.

A check valve is a valve that ensures fluid only flows in one direction in a plumbing system. The check valve typically has two openings, and the water (or whatever) passes in one port and out the other.

It works off a concept called “pressure differential.” This mechanism closes the valve when the pressure is higher on the outlet side. The mechanism can come in many different forms.

Check Valves, also known as Non Return Valves (NRV) or One Way Valves, are automatic valves that normally allows fluid (liquid or gas) to flow through it in only one direction. Check valve open with forward flow and close against reverse flow. Check valves differ considerably from other members of the valve family and the prime function of a check valve is to protect mechanical equipment in a piping system by preventing reversal of flow by the fluid.

Check valves are entirely automatic in their operation having no requirement for any operator or external control; so most do not have any valve handle or stem. Check valves are powered by the fluid flow and the pressure difference that exists between their inlet and outlet ports.

Few Important Technical Terminologies Used in Check Valve Operations:

Cracking Pressure:

Refers to the minimum differential upstream pressure between inlet and outlet at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure. Cracking pressure is also known as unseating head (pressure) or opening pressure.

Reseal Pressure:

Refers to the pressure differential between the inlet and outlet of the valve during the closing process of the check valve, at which there is no visible leak rate. Reseal pressure is also known as sealing pressure, seating head (pressure) or closing pressure.

Back Pressure:

Refers to the pressure differential between the inlet and outlet of the check valve when the pressure is higher at the outlet of the valve than that at the inlet or a point upstream of the valve.

Check Valve Working Principle:

A check valve requires a minimum upstream pressure (pressure differential between inlet and outlet), also known as cracking pressure, to open the valve and allow fluid flow through it. If the upstream pressure ever falls below the cracking pressure or there is a back pressure (flow attempting to move from the outlet to the inlet), then the check valve will close automatically.

Depending on the check valve design, the closing mechanism can change and the closing process can be assisted by a spring or gravity. The back pressure pushes the closing mechanism (a gate, ball, diaphragm, or disc) against the orifice and seals it.

Bangladesh Mine Project

Main products:

Foot Valves, Check Valves and Motorized gate valves.

project description:

WESDOM customizes the most suitable solutions for customers according to the actual needs of customers’ working conditions;

Client feedback:

WESDOM products are of high quality, Now all products have well installed on site.

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