There are several different types of industrial check valves used in various applications. Swing check valves are commonly used to prevent backflow. They consist of a hinged disc that opens to allow flow in one direction. These valves are suitable for low-pressure drop and moderate flow rates. Piston Check Valve: Piston check valves use a piston or a disc to control the flow. The piston moves up and down to allow or block the flow. Swing check valves cannot handle high-pressure applications or high flow rates, making these valves a better option for those scenarios. Ball Check Valve: Ball check valves have a spherical ball inside the valve body. When the flow is in the forward direction, the ball is pushed away from the seat, allowing the fluid to pass through. When the flow reverses, the ball is forced against the seat, preventing backflow. Ball check valves are commonly used in high-flow rates and low-pressure drop applications. Tilting Disc Check Valve: Tilting disc check valves have a disc that tilts to allow flow in one direction and closes to prevent backflow.  Wafer Check Valve: Wafer check valves fit between flanges and are secured by fluid pressure.  Stop Check Valve: Stop check valves combine the features of a lift check valve and a globe valve. They can be used as a regular check or shut-off valve when needed.  Silent Check Valve: Silent check valves are designed to minimize noise and water hammer effects. They have a spring-loaded disc that allows flow in one direction and closes to prevent backflow.  It’s important to note that different manufacturers may have variations of these check valves, and the specific design and features can vary. It’s recommended to consult the manufacturer’s specifications and guidelines for the particular application requirements.