Manual operator with position indicator

ISA 5.1-2009/2022 (final control element actuators) / PIP PIC001 (local indication)

Drawn as

A handwheel valve with a small half-round dial with a pointer beside the stem, or a ZI bubble linked to the stem.

Meaning

Manual valve with a local open/closed position indicator, often required on firewater and deluge isolation valves so the position can be checked at a glance.

Variants

ISA style: a ZI bubble joined to the stem by a short line
Rising-stem gate valves are sometimes noted "OS&Y" (outside screw and yoke) instead