Updated: Feb 11, 2020
A ball check valve is a simple and reliable valve with the only moving part to block the reverse flow, is a spherical ball. The full-ported valve seat is uniquely designed allowing the ball to seat leak-tight without getting wedge into the valve seat. For vacuum or anti-flooding valve application a "floating" rather than "sinking" ball is used. Due to its simple flow efficient and virtually maintenance free design the valve is commonly specified and used in submersible wastewater lift stations.