Butterfly valve symbol
A butterfly valve turns a disc in the flow to open, close or throttle the line. It is short, usually fitted between two flanges.
What the butterfly valve symbol means
A butterfly valve turns a disc in the flow to open, close or throttle the line. It is short, usually fitted between two flanges.
How it is drawn
The valve body with a line through the centre, drawn between flanges.
Isometric SVGWhere you see it
Large lines such as cooling water, seawater and utilities.
What is written next to it
On the isometric, the butterfly valve usually carries the valve tag and an item number.
What gets checked on site
For a butterfly valve, the site checks usually cover the disc clears the pipe and flanges when it opens, and the bolting. Each check is recorded against the line and the joint, so the line can go into its test pack and be handed over with its evidence. See the ITR guide.
Related symbols
Frequently asked questions
What does the butterfly valve symbol look like?
The valve body with a line through the centre, drawn between flanges.
Where is a butterfly valve used?
Large lines such as cooling water, seawater and utilities.
- In production since 2014
- Thousands of daily users
- On MODEC FPSO projects since 2016