Commonly used P&ID symbols (Piping and Instrumentation Diagram symbols) for manual valves. Note that they may differ slightly from one project to another.
| Gate Valve |  {adinserter 1} |
| Normally Closed Gate Valve |  |
| Ball Valve |  |
| Normally Closed Ball Valve |  {adinserter 1} |
| Globe Valve |  |
| Butterfly Valve |  |
| Check Valve |  |
| Plug Valve |  {adinserter 1} |
| Needle Valve |  |
| Self Draining Valve |  |
| Integrated Block and Bleed Valve |  |
| Auto Recirculation Valve |  |
| Angle Valve |  |
| Angle Globe Valve |  |
| 3-way Valve |  |
| Y Blowdown Valve |  |
| Angle Blowdown Valve |  |
