One-way Check Valve: The one-way check valve is the most common type of check valve; it permits fluid flow in only one direction while preventing backflow. Typically, a one-way check valve consists of components such as a valve body, bonnet, disc, and spring; the disc opens or closes in response to fluid pressure.
Suspended Check Valve: The suspended check valve is a specialized type of one-way check valve in which the disc is suspended within the valve body. Generally, a suspended check valve comprises a valve body, bonnet, disc, and spring; the disc opens or closes under the influence of fluid pressure.
Lift Check Valve: The lift check valve is a specialized type of one-way check valve in which the disc is connected to the bonnet via a lift stem. Typically, a lift check valve consists of a valve body, bonnet, disc, lift stem, and spring; the disc opens or closes in response to fluid pressure.
Swing Check Valve: The swing check valve is a specialized type of one-way check valve in which the disc opens and closes through a rotational motion. Generally, a swing check valve comprises a valve body, bonnet, disc, and pivot shaft; the disc opens or closes by rotating.