Stop-Lift-Check Valve

A Stop-Lift-Check Valve, also known as an SL-C valve, is a type of valve used in piping systems to control the flow of fluids. It is designed to perform three main functions: stopping the flow, lifting the valve disc, and checking the flow.

The stop function of the valve is achieved by closing the valve disc against the valve seat, effectively blocking the flow of fluid through the pipeline. This is useful when maintenance or repairs need to be carried out on the system, or when it is necessary to isolate a specific section of the pipeline.

The lift function of the valve allows the valve disc to be raised from the valve seat, allowing fluid to flow through the pipeline. This is typically done manually or through the use of an actuator, depending on the design of the valve. The lift function is useful when it is necessary to open the valve and allow fluid to pass through.

The check function of the valve ensures that fluid flows in only one direction. It prevents backflow or reverse flow of fluid, which can be detrimental to the system or equipment downstream. The check function is achieved by the design of the valve disc and seat, which allows fluid to flow in one direction but prevents it from flowing in the opposite direction.

Stop-Lift-Check Valves are commonly used in various industries, including oil and gas, water treatment, chemical processing, and power generation. They are typically installed in pipelines where flow control, isolation, and prevention of backflow are critical.

Overall, Stop-Lift-Check Valves are versatile and reliable valves that provide multiple functions in a single device, making them essential components in many piping systems.