Which type of valve is recommended to be installed in the discharge line of pumps?

A spring-loaded check valve is recommended for installation in the discharge line of pumps for several important reasons. Firstly, this type of valve is specifically designed to prevent backflow in a system, which is critical in pump applications. When the pump is stopped or if there is a pressure drop in the system, the spring-loaded mechanism ensures that the valve closes quickly and effectively, preventing the reverse flow of fluids.

This functionality is crucial in protecting the pump and the overall plumbing system from potential damage caused by backflow. Additionally, the spring-loaded check valve maintains its sealing ability over time, ensuring reliable operation in various pressure conditions. Furthermore, this type of valve has a relatively compact design and low pressure drop when the fluid is flowing in the forward direction, which contributes to the efficiency of the pumping system.

In contrast, other types of valves, such as butterfly valves and ball valves, while effective for stopping and regulating flow, do not inherently provide the same level of protection against backflow. Globe valves, though they can be used for throttling, are not ideal for preventing backflow and can introduce significant pressure losses in the system. Therefore, the spring-loaded check valve is the optimal choice for safeguarding pump discharge lines.