Check Valve (Non Return Valve)

  • Check valves Manufacturer

    Check valves are mechanical devices that permit liquids and gases to flow in only one direction, preventing flow from reversing. They are classified as one-way directional valves meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. Fluid flow in the desired direction opens the valve, while backflow forces the valve closed.
    Check valves have a cracking design pressure which is the minimum pressure upstream required to open or operate. Customers can carefully match application requirements thru many different types of valves.
    The tilting disc type in Check valves is designed to overcome some of the weaknesses of conventional swing type valves. The design of the tilting disk enables the valve to open fully and remain steady at lower flow rates and close quickly when the forwarding flow stop.
    The dome-shaped disc floats in the flow and fluid flow on both the bottom and top of the disk surfaces. As the disk is spring-loaded, when forward flow pressure reduces, the spring force helps the valve to close fast.  In the image above, you can see the flow from the valve.

    check valves are mostly used to move liquids since the ball mechanism is not the best for creating an airtight seal.
    • Swing check valves can wear out prematurely due to the force used when closing the valve. As a result, many swing check valves come with a non-slam feature that regulates how the valve closes.
    • Swing check valves often feature a larger pressure drop than across other types.
    • Disc check valves usually cost less than other standard valves since they are usually smaller and lighter. They can be installed in any position, including vertical pipelines.
    • Disc check valves do not perform well for applications where there is a heavily pulsating flow.
    • Split disc check valves are used when the size and pressure drop of swing and disc check valves are too great and limit functionality.
    • Split disc check valves are advantageous in applications that need large check valves, low-pressure drops, lower operating pressures, and/or for applications that need check valves installed in any position, even vertical pipes.