Our TECFLOW duckbill check valve with carbon steel flange can reduce the vibration and noise generated during pipeline operation and also compensate for the size change of the pipeline due to thermal expansion and contraction.

A check valve is a non-return device that requires no external power source or manual assistance to operate. Check valves rely on a flow rate or differential pressure to operate without manual or automated intervention. One of the most important characteristics is the minimum pressure required to open the valve, known as the opening pressure.

Some check valve designs are prone to corrosion, scaling, and erosion; this duckbill type is made of durable elastomeric materials. The check valve is a one-piece, flexible, duckbill-shaped sleeve that opens at the opening pressure and closes again below this threshold. Any reverse differential pressure seals the valve tightly, preventing backflow.

They can be installed in existing pipelines or in new infrastructure, and are often used to replace existing valves that have proven inadequate. Due to their extremely simple design and robust construction, these types of check valves require no maintenance and have a long service life.

They are widely used in water supply, drainage, chemical engineering, construction, petroleum, refrigeration, sanitation, water heating, fire protection and electric power, and are available in sizes from DN32 to DN2000.

The carbon steel Q235 flange is PN16, EN 1092-2, with an operating temperature range of -15°C to 80°C.

TECFLOW valves are exclusive to Automated Environmental Systems in the UK