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A valve bowtie with a rectangle at its centre.
Also known as: Cock valve symbol, Tapered plug valve
On a piping diagram a plug valve is drawn with a small rectangle at the valve centre, representing a tapered or cylindrical plug bored to pass flow.
Denotes a plug valve, closed by rotating a bored plug within the body.
Contexts: Technical drawing
Belongs with the ball valve to the quarter-turn group, differing in the shape of the closure rather than in the action.
Contexts: Technical drawing
Two triangles meeting point to point with a small rectangle drawn at their junction.