Check valves

CHECK VALVE

Unidirectional Flow

Check valves are used in applications where reverse flow would cause dangerous conditions, damage to equipment or affect the quality of the product

Lift Check Valve

Lift Check Valves are used for irregular or pulsating flows because they do not chatter as much as swing check valves. A Foot  valve is a type of vertical-Lift check valve. Foot valves are installed at the bottom of pump suction pipe submerged in a fluid, such as a cooling tower basin. The valve allows fluid to flow upward into the pipe, but not back into the basin. Because of the possibility of debris at the bottom of a basin, foot valves usually have an intake strainer

Swing Check valve

The Horizontal Swing Check Valve is the most commonly used type of check valve.

The disc hangs almost vertically and is moved by the horizontal flow of the fluid through the valve.

Swing check valves offer the least resistance to flow, but they have a tendency to create noise and vibration when flow reversed are frequent.

This noise is called chatter.

Ball Check valve 

Ball Check valves are used in processes containing viscous fluids or fluids that may contain particulate matter in them.

One of the most common uses of ball check valves is in machine lubrication systems.

Because ball check valves operate rapidly and quietly, they are used in systems where there are frequent pressure changes and flow reversals.