Check Valves

Our Valves are produced according to International ASTM ANSI Standards, ASTM API Standards, and ASTM DIN Standards in India. 

Product description

Check Valves are one of the most important Valves in a system. They work to assure continuous processes and protection. But what are Check Valves and wherewith does it work? A Check valve, clack valve, non-return valve, reflux valve, retention Valves, or one-way Valve is a Valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

Working Principle

Check Valves are two-port valves, indicating they have two openings, one for fluid to enter and the other for fluid to leave. There are various types of Check Valves used in a wide variety of applications. Check Valves are often used for common household items. Although Vylmech Engineering Pvt. Ltd.’s Check Valves are obtainable in a Broad Range of sizes and costs, they are commonly very small, simple, or economical. Check Valves work automatically and most are not controlled by a person or any external control.

Product Applications

Key Features

• Metal or soft seated options.

• Renewable nickel alloy seat and Integral elastomeric seat.

• Variety of flange configurations.

• Spring-loaded hinge.

• External spring adjustment and Manual override.

• Serviceable in-line.

• Variety of material options and bore sizes.

• Wide temperature ranges.


Check Valves are flow sensitive and rely on the line fluid to start and end. The internal disc enables the flow to pass ahead easily, which starts the valve. The disc begins shutting the Valves as forwarding flow limits or is converted, depending on the design. Development is normally manageable with only a few components such as the body, seat, disc, and cover. Depending on the design, there may be other objects such as a stem, hinge pin, disc arm, spring, ball, elastomers, and bearings.

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