purpose of check valve

Apart from back-flow prevention, there are other uses: 1) Spring loaded or 'silent' check valves assist in minimizing water hammer effects by the fast closure of the valve before flow reverses. 2) There are other specialized check valves used in steam extraction lines from turbines. These are power-assisted and prevent water from entering the turbine.
R.V.Ramachandran Received on Sat Nov 26 10:54:00 2005