A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

Choose from our selection of one-way flow valves, including threaded check valves, check valves, and more. Same and Next Day Delivery.

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Aug 18, 2024 · A one-way check valve allows flow in only one direction. Typically, an arrow on the valve's housing indicates the flow direction. If there is no arrow, use your finger or a narrow rod to …

Aug 28, 2020 · Check valves allow fluid flow only in the forward direction that’s why it is called a one-way valve or non-return valve. They work on the principle of differential pressure. It means the check …

Swagelok ® check valves are designed to allow fluids to flow in one direction only. Our check valves are available in a variety of designs, including poppet, lift, and all-welded versions for use in general …

Check valves, also known as nonreturn or one-way valves, are designed to enable fluid to flow one way in a pipeline. Because of their simple design, check valves generally operate without automation or …

Jul 16, 2024 · A one-way valve, also known as a check valve or non-return valve, is a mechanical device that permits fluid to flow in only one direction— from the inlet to the outlet —and automatically …

Check Valve KN23080 One-Way Check Valve Permits air flow in one direction only. Used wherever pressures must be isolated and not allowed to flow back. Female-female thread. Notes Use heavy …

Jan 2, 2026 · Discover the essential role of a one-way check valve in fluid systems. We explain its function, operating mechanisms, and critical applications.