Swing check valve - areused to prevent back flow in the line. The pressure of the fluid passingthrough a system opens the valve, while any reversal of flow will close thevalve. The swing check valve functions by allowing flow forces to move theclosure element,
Lift check valve -lift check valve is one type of spring loaded lift check valve, which isnormally mounted between two flanged piping as non-return valve Lift Checkvalves are particularly suitable for high-pressure service where velocity offlow is high. In lift Check valves, the disc is precisely guided and fitsperfectly into the dashpot.