The body routes flow through an internal partition and up through a horizontal seat port, where a disc or plug moves perpendicular to the seat. Because the opening changes in proportion to stem travel, globe valves throttle smoothly and shut off tightly, at the cost of a much higher pressure drop than a gate or ball valve. Patterns include the standard Z-body, the Y-pattern for lower resistance, and the angle body.
Bypass around the steam trap is a globe valve, so you can pinch it in and actually control what goes through.
Small globes are usually installed with flow entering under the seat so that, when shut, the packing sees only downstream pressure.
Also heard as
- stop valve
- screw-down stop valve
Related terms
Gate valve
A multi-turn isolation valve that lifts a flat or wedge-shaped gate clear of the flow path to open.
Disc
The movable closure element that seats to stop flow in globe, check, safety and butterfly valves.
Seat
The surface inside a valve that the closure member presses against to stop flow.
Throttle
To hold a valve partly open on purpose to restrict and regulate flow or pressure.
Control valve
A power-operated valve that modulates flow on a controller signal to hold pressure, level, flow or temperature at setpoint.