Globe Valves

Globe Valves

Globe valves are flow-controlling valves that regulate flow rate by positioning a disc or plug against a seat to vary the effective orifice area. Unlike gate valves, which are designed for fully open or fully closed service, globe valves are specifically engineered for throttling — the valve can be set at any position between fully open and fully closed to achieve the required flow rate. Globe valves are widely used in steam, water, oil, and gas service for manual flow control, bypass regulation, and pressure let-down applications. AIMS Industrial supplies globe valves in carbon steel and stainless steel for industrial process and utility pipework.

Globe Valve Construction

The globe valve's internal flow path forces fluid to change direction as it passes through the valve body — entering through one port, passing over and under the disc/seat, and exiting through the other port. This S-shaped or Z-shaped flow path provides a larger pressure drop than a gate valve in full-open position (globe valves are not efficient for unrestricted flow), but the disc-to-seat geometry makes fine flow adjustment controllable and repeatable. The rising handwheel stem provides a visual indication of valve position — the height of the stem above the packing gland indicates whether the valve is open or closed.

Types and Applications

• Standard globe valve: The most common form, with a flat or contoured disc against a flat seat. Suited to general industrial service — steam, water, air, and oil.
• Y-type globe valve: Angled body design that reduces the pressure drop compared to the standard Z-pattern body. Used in high-pressure steam and process service where minimising pressure loss is important.
• Needle valve: A tapered needle-point disc against a matching seat provides very fine flow control for low-flow, precision applications.

Material Selection

Carbon steel globe valves suit steam, water, oil, and gas service at moderate to high pressures. Stainless steel (316) is specified for corrosive media, food and pharmaceutical service, and seawater applications. Bronze and gunmetal globe valves cover low-pressure water and compressed air service. For globe valve selection by service conditions and pressure class, contact our team.

Globe Valve Selection and Sizing

Correct valve sizing is critical to both flow control performance and service life. An oversized globe valve operated near closed position experiences high fluid velocity through the partially open seat, which accelerates erosion and wear. Undersized valves create excessive pressure drop and restrict system flow. For precise throttling applications, select a valve where normal operating position falls between 25% and 75% open — this provides good controllability and minimises seat wear. Material selection should account for the fluid being controlled, operating temperature, and line pressure; bronze suits general water and low-pressure steam, while stainless steel is appropriate for corrosive media and higher-pressure applications.