How do I choose a check valve?

Some of the things you may need to consider are fluid compatibility, flow characteristics, headloss, non-slam characteristics and total cost of ownership. For optimal performance, it is of course important to choose your valve respecting the characteristics of each specific installation.

Is check valve required for pump discharge?

With water hammer, there is a need of fast-closing check valve to prevent pressure surges and the resulting shock waves that occur when the disc slams into the seat, sending noise, vibration, and hammering sounds that can rupture pipelines and damage equipment and pipe supports.

What type of valve is a check valve?

unidirectional valves
Check valves are unidirectional valves that provide unobstructed flow in one direction as long as flow pressure remains constant and protect the piping system against reverse flow. The three main types of check valves we offer are ball, piston, and stop check valves.

What is a discharge check valve?

An essential element in the design of water and wastewater pumping systems is the proper selection of the pump discharge check valve, the purpose of which is to automatically open to allow for forward flow and automatically return to the closed position to prevent reverse flow when the pump is not in operation.

What are the three different types of check valves?

Check valves are unidirectional valves that provide unobstructed flow in one direction as long as flow pressure remains constant and protect the piping system against reverse flow. The three main types of check valves we offer are ball, piston, and stop check valves.

What is a PVC check valve used for?

They are used to prevent backflow, ensuring the proper operation of the system and preventing damage from happening. Check valves work fairly simply. Pressure from the liquid that is flowing through a piping system opens the valve while any flow-reversal will close the valve.

What is the cracking pressure of a check valve?

What Is Check Valve Cracking Pressure? Cracking pressure refers to the inlet pressure level at which the first sign of flow is present. It can also be described as a measure of the pressure differential between the inlet and outlet ports of the valve when flow is initially detected.

Should a check valve be before or after pump?

On booster pump applications, a check valve can be placed on the suction or discharge of a centrifugal pump. If an additional check valve is required, it should be placed after the pressure tank to allow the pump and discharge pipe to remain pressurized.

What is a check valve?

A check valve, clack valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. A check valve is an electronic equivalent of a diode which permits the flow of electrical current in one direction only. The various practical applications of check valves are as follows.

What are the recommended valves in a pumping system?

What are the recommended valves in a pumping system? A pumping system typically requires three valves: an inlet (suction) shut-off valve, an outlet (discharge) shut-off valve, and a check valve between the pump discharge nozzle and the discharge shut-off valve to avoid reverse flow and protect the pump from backpressure.

Do I need a reverse flow check valve for a pump?

CHECK VALVES FOR PUMP DISCHARGE Two of the most common problems with check valves are reverse flow and water hammer. In both situations, a fast-closing valve is required. Reverse flow can be expensive, especially if it occurs at the discharge of a pump and the pump spins backwards.

What is the difference between a lift and swing check valve?

 Lift Check Valves are typically supported just like a pipe fitting and are supported by the pipe itself.  Large Swing Check Valves may have considerable weight and require concrete pads to support the valve weight.