Angle valve symbol
An angle valve has its inlet and outlet at 90 degrees, so it turns the flow as well as controlling it. It saves an elbow and is common on drains and choke duties.
What the angle valve symbol means
An angle valve has its inlet and outlet at 90 degrees, so it turns the flow as well as controlling it. It saves an elbow and is common on drains and choke duties.
How it is drawn
One triangle in the incoming line and one in the outgoing line at 90 degrees, meeting at their points in the corner.
The angle valve symbol in each standard
Drawn as on most US-style legend sheets.
Valve, angle type (general). Drawn the same way: one triangle in the line, one turned 90 degrees.
German (DIN): Eckventil. See DIN P&ID symbols.
Where you see it on a P&ID
On drains, vessel bottoms, wellhead chokes and some control valves.
Tag codes
The angle valve is commonly tagged:
- HV
- FV or PV when actuated
Tag formats follow the project numbering procedure. For instruments, the letters follow ISA 5.1, explained on the instrument symbols page.
Related symbols
Frequently asked questions
What does the angle valve symbol look like on a P&ID?
One triangle in the incoming line and one in the outgoing line at 90 degrees, meeting at their points in the corner.
What is a angle valve used for?
An angle valve has its inlet and outlet at 90 degrees, so it turns the flow as well as controlling it. It saves an elbow and is common on drains and choke duties. You will find it on drains, vessel bottoms, wellhead chokes and some control valves.
What tag does a angle valve have?
It is commonly tagged HV, FV or PV when actuated. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the angle valve symbol the same in ISA and ISO?
Yes, ISO 10628-2 draws it the same way (2102). Companies vary the details, so always check the legend sheets at the front of the P&ID set.
What is the angle valve called in German?
Eckventil. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
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