Installation methods of different check valves
Swing check valve: The disc of the swing check valve is disc-shaped and rotates around the shaft of the valve seat passage. Because the passage in the valve is streamlined, the flow resistance is smaller than that of the lift check valve. It is suitable for It is not suitable for pulsating flow, and its sealing performance is not as good as that of the lift type.
Disc Check Valve: A check valve in which the disc rotates around a pin in the seat. The disc check valve has a simple structure and can only be installed on the horizontal pipeline, and the sealing performance is poor.
In-Line Check Valve: A valve in which the disc slides along the centerline of the valve body. Pipeline check valve is a new valve. It is small in size, light in weight and good in processing technology. It is one of the development directions of check valve. However, the fluid resistance coefficient is slightly larger than that of the swing check valve.
Compression check valve: This kind of valve is used as a valve for boiler feed water and steam cut-off. It has the comprehensive function of lift check valve and globe valve or angle valve.
In addition, there are some check valves that are not suitable for pump outlet installation, such as foot valve, spring type, Y type, etc.