This Valve Symbols Legend CAD sheet is a useful reference for P&ID, process, and MEP drawings. It includes a wide range of standard valve symbols and related items so your drawings stay consistent and easy to read for engineers, installers, and commissioning teams.
The legend covers many common valve types used in mechanical and process piping, such as:
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Gate valves (hand-operated, motor-operated, closed gate)
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Globe valves (hand-operated, angle globe)
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Ball valves (including normally closed ball)
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Check valves and variations
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Butterfly valves
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Control valves and powered/actuated valves
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Solenoid valves and pilot/float-operated valves
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Relief / release valves, back pressure regulator
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Plug/cock valves, diaphragm valves, needle valves
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Specialty items like pinch valve, bleeder valve, knife/slide valve, metering valve, orifice, rotameter, water flow meter, and more
Use this CAD legend for:
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P&ID and process documentation sets
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MEP plumbing and HVAC piping drawings
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Training junior drafters on correct valve symbols
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Standard templates for consultants and contractors