What is a flex check valve?

The Swing-Flex® Check Valve is the valve of choice based on its simple maintenance-free design, low headloss and non-slam characteristics. The valve’s smooth, unrestricted full flow design makes it an excellent choice for slurries and sludge, even in vertical flow up applications.

What is the difference between check valve and a non return valve?

A non-return valve lets the fluid flow in one direction. When fluid in the line reverses direction, a check valve prevents backflow by allowing flow in one direction. The check valves are usually designed for a particular pressure.

Will a check valve stop water hammer?

Studies and research at major hydraulics research institutions have shown that silent check valves, will, in fact, significantly reduce water hammer by reducing the severity of the pressure spikes.

What is a backflow actuator?

An optional backflow actuator may be mounted on the bottom of the valve to allow manual backflow through the valve in the reverse direction. Optional Mechanical Indicators and Limit Switches may be mounted on the valve cover to provide local and remote position indication.

What are check valves used for?

A check valve is a type of valve which only permits flow in one direction. These valves are often designed for safety reasons, to prevent backflow and to ensure that someone operating a system knows which direction fluids and gases are flowing in.

What are the types of check valve?

Check valves are designed to pass flow in one direction with minimum resistance and to prevent reverse or back flow with minimal leakage. The principal types of check valves used are the tee-pattern lift check, the swing check, the tilting-disc check, the Wye-pattern lift check, and the ball check, illustrated in Figs. A to E, respectively.

Is check valve and ball valve same?

For example, ball check valves in high-pressure pumps used in analytical chemistry have a ball of synthetic ruby, which is a hard and chemically resistant substance. A ball check valve is not to be confused with a ball valve, which is a quarter-turn valve similar to a butterfly valve in which the ball acts as a controllable rotor.

What is a silent check valve?

Silent Globe Valve. A globe style silent check valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body.