API Cast Steel Globe Valve

A globe valve is a type of valve used to start, stop, and/or regulate flow in a pipeline. The valve has a movable disk-type element and a stationary ring seat within the valve body and it is effective in throttling flow and allowing for precise control.

Globe valve advantages:
-Exceptional throttling and modulation: Globe valves are ideal for precise flow control, allowing fine adjustments to flow rate, which is crucial in systems requiring regular modulation.
-Reliable shutoff capability: They ensure a tight seal when closed, critical for stopping flow during maintenance or emergencies.
-Maintenance and repair efficiency: Designed for easy maintenance, their components are readily accessible, reducing downtime and costs.
-Versatility in maintenance: The disc and seat can be replaced or resurfaced, prolonging valve life and ensuring efficient operation.

Globe valve disadvantages:
-Significant head loss: One major disadvantage of globe valves is the pressure drop due to the fluid’s path through the valve, which can be mitigated by using Y-shaped or angle globe valves for less turbulence and pressure loss. The head loss should be considered while designing globe valve flow parameters.
-Increased operating force: More force is required to operate globe valves, especially in high-pressure settings, often necessitating automated actuators.
-Slower operation: Their design is not suited for situations requiring quick opening or closing due to the multi-turn operation.
-Susceptibility to cavitation and flashing: High-pressure differentials can cause cavitation and flashing, potentially damaging the valve.
-Cost: The complex design and manufacturing process make globe valves more expensive compared to other valve types.