BALL TYPE

A ball check valve functions by means of a ball that moves up and down inside the valve. The seat is machined to fit the ball, and the chamber is conically shaped to guide the ball into the seat to seal and stop a reverse flow.

If the pump capacity is not sufficient it is possible to choose a lighter ball, and if water hammer occurs when the pump stops, it may be solved by selecting a heavier ball.

The purpose of using a ball check valve is to prevent backflow in a pipeline system and ball check valves are often placed on the outlet side of a pump to protect the pump. Ball check valves are commonly used in wastewater applications as well as in fire protection and irrigation systems.

Ball check valves are often preferred for use in pumping stations that are rarely attended, since they demand only limited maintenance, typically if the ball makes noise caused by insufficient pump capacity or water hammer.