How to identify valves
Valves start, stop, direct or regulate the flow of liquids and gases.
Have one in front of you? Photograph it and get an evidence-backed identification.
Identify from a photoIdentification clues
- —Cast body markings: size (DN/NPS), pressure class (PN/Class), material, flow arrow
- —Port count and thread or flange standard
- —Actuator type — lever, handwheel, solenoid, pneumatic
- —Solenoid coil label (voltage, power)
- —Name plate or tag with series
Common types
- —Ball
- —Gate
- —Globe
- —Butterfly
- —Check
- —Solenoid
- —Directional control
- —Pressure relief
Typical failure modes
- —Seat leakage
- —Stem packing leaks
- —Sticking or seizure
- —Coil burn-out
- —Erosion / cavitation damage
What a replacement must match
- —Match size, pressure class and end connection
- —Match body and seal materials to the medium
- —Match actuator and control signal
- —Confirm face-to-face dimension
Photos that help identification
- —Photograph cast markings on both sides
- —Show the ports and connections
- —Include the coil or actuator label
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Related guides
General reference information. Always verify against the manufacturer’s documentation before ordering or installing.