INSTRUMENTS AND PROCESS EQUIPMENT SYMBOLS

This section shows some of the many instrument symbols found in different types of technical diagrams used to document instrument systems.

1. Line types

2. Process/Instrument line connections

3. Instrument bubbles

4. Process valve types

5. Valve actuator types

 

6. Valve failure mode

 

7. Flow measurement devices (flowing left-to-right)

 

8. Process equipment

 

9. Functional diagram symbols

 

10. Single-line electrical diagram symbols

 

11. Fluid power diagram symbols

 

  

Article source form : 

Lessons In Industrial Instrumentation
By Tony R. Kuphaldt
Version 1.4 – Released April 11, 2010