Gear operator
ISA 5.1-2009/2022 (final control element actuators) / PIP PIC001
Drawn as
A valve body with a small square box (gearbox) on its stem, and a handwheel shaft coming out of the side of the box.
Meaning
Manual valve with a gearbox, for large or high-pressure quarter-turn valves (ball, plug, butterfly) where a lever would be too hard to move.
Variants
- Some legends draw a handwheel T with "G" or "GO" beside it
- Bevel-gear operators on gate valves are drawn the same
Tags
HV