P&ID symbols for valves
Commonly used valve P&ID symbols (Piping and Instrumentation Diagram symbols) for manual valves. Note that they may differ slightly from one project to another.
| Valve Type | Valve P&ID Symbols | Application |
| Gate Valve |  |
Used when a straight flow of fluid and minimum restriction is desired |
| Normally Closed Gate Valve |  |
|
| Ball Valve |  |
Withstand extreme pressure/temperature and high volume flow. Used for high flow capacity. |
| Normally Closed Ball Valve |  |
|
| Globe Valve |  |
Excellent to be used as a control valve due to its complex flow path. This valve is known for precise throttling and control. |
| Butterfly Valve |  |
Can be used for liquids/gases that can easily be displaced when the valve disc closes. |
| Check Valve |  |
To ensure the fluid flow only in one direction, automatically preventing the backflow. |
| Plug Valve |  |
Plug valves are used for - on-off control on flow; moderate flow throttling; flow diversion using multiport valves |
| Needle Valve |  |
Needle valves are used as bleed valves or drain valves in the block and bleed assembly. |
| Self Draining Valve |  |
As the name suggests these valves come with a drain port. |
| Integrated Block and Bleed Valve |  |
For faster assembly of block and bleed valve arrangement. |
| Auto Recirculation Valve |  |
|
| Angle Valve |  |
To be used for pipes joining at an angle. |
| Angle Globe Valve |  |
|
| 3-way Valve |  |
|
| Y Blowdown Valve |  |
|
| Angle Blowdown Valve |  |
More references for creating P&IDs
- Typical P&ID arrangements and P&ID symbols for process design
- Basics of P&IDs (Piping & Instrumentation Diagram)
- P&ID software reviews