Crane Valves for Fluid Control Systems

In any fluid handling system, valves play a crucial role in controlling the flow of fluids, whether it's starting or stopping flow, regulating or throttling, preventing backflow, or managing pressure. Crane valves, renowned for their versatility and reliability, are commonly used across a variety of applications. The following guidelines can aid in selecting the right steel valves for specific needs.

Gate Valves

Gate valves are highly efficient stop valves, suitable for applications where flow needs to be stopped in either direction. They are most effective when full flow is required, as they cause minimal pressure drop. Throttling is not recommended, as partially open gate valves can create irregular flow patterns that hinder precise flow control. Additionally, high-velocity flow across the seats may cause damage. Gate valves are designed for use in fully open or fully closed positions, providing optimal performance in these states.

Swing Check Valves

Swing check valves are designed to prevent the reversal of flow in pipelines. These valves can typically be installed in both horizontal and vertical, upward-flow configurations. They are favored for their low flow resistance and are particularly effective in low-velocity applications. Swing check valves ensure fluid flows in one direction, offering protection against backflow while minimizing energy loss.

Stop Check Valves

Stop check valves combine the characteristics of globe and angle valves but lack a mechanical connection between the stem and disc. While they are not intended for throttling, they play an essential role in specific systems, such as steam boiler outlet piping, where multiple boilers are connected to a common header. These valves are installed with pressure under the disc, and when the stem is raised, only the boiler pressure can lift the disc, allowing the valve to function effectively when boiler pressure exceeds header pressure. Stop check valves are key in preventing steam backflow from the header into the boiler.

By understanding the functionality and optimal applications of different valve types, users can make informed decisions to enhance the efficiency and reliability of their fluid handling systems.