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A valve body with a curved diaphragm line.
Also known as: Weir valve symbol, Membrane valve symbol
On a piping diagram a diaphragm valve is drawn with a curved line across the body, representing a flexible membrane pressed onto a weir to close the flow.
Denotes a valve closed by a flexible diaphragm pressed onto a weir or seat.
Contexts: Technical drawing
Keeps the closure member out of the flow path entirely, which is why it is used for corrosive, sterile and slurry service.
Contexts: Technical drawing
A valve body with a shallow curve drawn across the flow path, representing the flexible diaphragm.