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