Plug valve symbol
A plug valve opens and closes with a quarter turn of a tapered or cylindrical plug with a port through it. It is robust and used on dirty or slurry services.
What the plug valve symbol means
A plug valve opens and closes with a quarter turn of a tapered or cylindrical plug with a port through it. It is robust and used on dirty or slurry services.
How it is drawn
The two-triangle valve body with a small solid rectangle in the middle.
Variants
- Multi-port plug valves are drawn with three or four ports
The plug valve symbol in each standard
Drawn as on most US-style legend sheets.
ISO 10628-2 has no separate symbol for this. Check the project legend sheet.
German (DIN): Kükenhahn. See DIN P&ID symbols.
Where you see it on a P&ID
On slurries, dirty services, and multi-port diverting duties.
Tag codes
The plug valve is commonly tagged:
- HV
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 plug valve symbol look like on a P&ID?
The two-triangle valve body with a small solid rectangle in the middle.
What is a plug valve used for?
A plug valve opens and closes with a quarter turn of a tapered or cylindrical plug with a port through it. It is robust and used on dirty or slurry services. You will find it on slurries, dirty services, and multi-port diverting duties.
What tag does a plug valve have?
It is commonly tagged HV. The exact tag format comes from the project numbering procedure and the legend sheets.
Is the plug valve symbol the same in ISA and ISO?
ISO 10628-2 has no separate symbol for this. Check the project legend sheet. Companies vary the details, so always check the legend sheets at the front of the P&ID set.
What is the plug valve called in German?
Kükenhahn. On a German R&I-Fließschema it is drawn to DIN EN ISO 10628-2.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016