Diaphragm valve

ISO 10628-2 (group 21, valves) / PIP PIC001

Drawn as

Bow-tie with a curved arc (the diaphragm bonnet) spanning the top of the body where the tips meet, and a stem above.

Meaning

Valve that closes by pressing an elastomer diaphragm onto a weir. Used for corrosive, slurry or chemical-injection service. No dedicated 3D component; use globe-valve and note the real type.

Variants

Some legends draw a small dome or a horizontal bar above the tips
Weir type vs straight-through is only on the datasheet