Stop-check valve

ISO 10628-2 (group 22, check valves) / PIP PIC001

Drawn as

A lift check (bow-tie, outlet filled, open circle at the centre) with a stem and handwheel on top, and a flow arrow beside it.

Meaning

Screw-down non-return valve: acts as a check valve, but the handwheel can also hold it shut. Used on boiler feeds and parallel pump discharges. No dedicated component; use check-valve-piston and note the handwheel.

Variants

Some legends draw a globe valve with an arrow and a handwheel