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Two triangles meeting at their points, the generic valve on a flow diagram.
Also known as: Bowtie symbol, Two triangles on a pipe, Valve symbol
Two triangles meeting point to point is the generic valve — a bowtie in a pipeline. What kind of valve it is comes from what is added on top, so the bowtie alone means only that flow can be stopped here.
Marks a valve in a pipeline on a process or piping diagram, in the generic form from which the specific types are built.
Contexts: Technical drawing
Is qualified by what is drawn on top: a stem and handwheel for a manual gate valve, a diaphragm for an actuated one, an arrow for direction.
Contexts: Technical drawing
Belongs to the diagram symbol sets governed by ISO 14617, which covers graphical symbols for diagrams across several engineering fields.
Contexts: Technical drawing
Two triangles set point to point on a horizontal line, forming a bowtie shape with the meeting point on the pipe's centreline.
Valve symbols on a process diagram, built from the same base.