There are several factors to consider when deciding on a check valve for your needs: Some disadvantages include the inability to determine the condition of the valve and its status, limitation(s) on its installation configurations, and the possibility of sticking in the open position (not often a problem associated with ball and piston types). They also provide a fast-acting solution to preventing backflow. The primary advantage of a check valve is they prevent reverse flow while typically requiring no external actuation.

Common case applications of stop check valves include:Ĭheck Valve FAQ What are some advantages/disadvantages of check valves? The main purpose of stop check valves is to prevent damage to pump or boiler systems upstream of the valve in the piping system. These features allow for the control of flow regardless of direction. Stop check valves combine the benefits of lift check valves with the positive closure functionality of globe valves. When there is a reduction of flow pressure, it falls back into place to prevent backflow.Īpplications of ball check valves include instances where high-pressure and high-velocity flows are critical and backflow may damage upstream components (Applications similar to piston check valves, but more suited to those for more viscous media). Once the cracking pressure is attained, the ball lifts up from its seat, allowing flow to occur. Feed water control in the nuclear industryīall check valves are lift check valves, and use a weighted ball rather than a disc to allow flow and inhibit backflow.Common cases employing piston check valves include: Depending on flow conditions, piston check valves sometimes include spring assistance to aid in closure. The valve bore maintains and guides piston alignment throughout its travel.

These function in a manner similar to ball check valves, allowing for flow as long as flow pressure remains steady, but applying gravitational closure when flow pressure decreases to a point where it no longer has the force to lift the valve. Piston Check ValvesĪlso part of the lift check valve family, piston check valves incorporate a weighted piston (or disc) to prevent backflow. The three main types of check valves we offer are ball, piston, and stop check valves. Check valves are unidirectional valves that provide unobstructed flow in one direction as long as flow pressure remains constant and protect the piping system against reverse flow. The purpose of check valves is to prevent backflow within a piping system.

Cc check valve vs ips