Check valves, also known as a clack valve, one-way valve, or non-return valve are designed to allow fluid to flow through in a single direction. Majority of check valves are pressure operated, and are contained within some type of pump system.
Check valves are made from carbon steel, stainless steel, or even P.V.C, and contain two openings. One opening is for fluid to enter the valve, and the other for it to exit. There are many things to consider when choosing the proper check valve, such as; cracked pressure, density of fluid, and of course the type of application.
Below are the various types of check valves:
- Ball Check Valve- Flow of fluid is blocked by a ball, most commonly used in spray bottles, mini pump dispensers, air pumps. Do not confuse with ball valves.
- Duckbill Valve- A soft tube which collapses upon back pressure, stopping the flow.
- Stop Check Valve-Fluid can be stopped regardless of pressure.
- Lift Check Valve-The disc in a lift check valve can be lifted off of its seat, allowing flow, until the downward pressure is greater, allowing the disc to settle and create a seal.
- In Line Check Valve- Similar to a lift check valve, only it is controlled by “cracked pressure” which controls a spring. Depending on the amount of “cracked pressure” will determine whether your valve will open or close.
- Swing Check Valve/Tilting Disc Check Valve- A metal disc on hinges swings to prevent reverse flow when on the seat, or allow a forward flow when not on the seat. A toilet flushing system is the perfect example of this type of valve.
- Diaphragm Check Valve- A pressure controlled valve, which uses a rubber diaphragm to create a seal.
Applications for check valves include domestic use, chemical plants, or power plants. If you would like to find out which check valve is right for your application, contact Detroit Nipple Works today!
Shipping of Check Valve is now available for Minnesota, North Dakota, South Dakota, or Oregon.