PID-Symbols-with-Examples - Safety Valves & Heat Exchanger Symbols

Nov 1, 2026

Uploaded by Jiven

Safety valves, heat exchanger units, pumps and compressors, and common piping and instrumentation diagram (P&ID) instrument/valve/tank symbols are presented with practical examples. The material groups symbols by function—pressure and vacuum relief components, rupture discs, cooling and exchanger types, pump and compressor configurations, instrument signal links, manual valve variants, and storage vessel forms. Notes indicate that symbol appearance may vary slightly between projects.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages35

Reading Time1 h 28 min

AccessFree to download

Safety Valves P&ID Symbols

Heat Exchanger P&ID Symbols

Pumps / Compressors P&ID Symbols

Instrument Signal P&ID Symbols

Valve P&ID Symbols

Storage Tanks / Vessels P&ID Symbols

P&ID Symbols for Control Valve and Actuators

| P&ID symbols with
examples | | --- | | | | INSTRUCTOR
Ahmed Yehia Mohamed
Process engineer, Suez Oil Processing Company (SOPC)
[Che.yehia@gmail.com](Che.yehia@gmail.com)
+20 1008907390 | Safety Valves P&ID Symbols Commonly used P&ID symbols (Piping and Instrumentation Diagram symbols) for safety valves. Note that they may differ slightly from one project to another. |
Pressure Relief Valve |
Vacuum Relief Valve |
Breathing Valve or Pressure / Vacuum Relief Valve | | --- | --- | --- | |
Pressure Rupture Disc |
Vacuum Rupture Disc | | Heat exchanger P&ID symbols Commonly used P&ID (Piping and Instrumentation Diagram) symbols for heat transfer equipment. Note that they may differ slightly from one project to another. |
Air cooler |
Generic heat exchanger |
Generic heat exchanger | | --- | --- | --- | |
Plate and frame heat exchanger |
Double pipe U tube heat exchanger |
Kettle type heat exchanger | |
Shell & Tube Heat Exchanger |
Fired heater |
Electrical heater | | --- | --- | --- | | | | | Pumps / compressors P&ID symbols Commonly used P&ID (Piping and Instrumentation Diagram) symbols for pumps / compressors. Note that they may differ slightly from one project to another. |
Centrifugal pump |
Motor |
Reciprocating pump / compressor | | --- | --- | --- | |
Rotary / Gear pump |
Vertical / Inline pump |
Vertical centrifugal pump with external motor | |
Vertical can pump |
Submersible pump with submersed motor |
Air driven double diaphragm pump | | --- | --- | --- | |
Centrifugal compressor |
Expander / turbine |
Turbine driven compressor | |
Reciprocating pump / compressor |
Screw pump or compressor |
Centrifugal blower | | | | | Instrument Signal P&ID symbols Commonly used P&ID symbols (Piping and Instrumentation Diagram symbols) for instrument signals. Note that they may differ slightly from one project to another. |
Process Connection |
Electric signal | | --- | --- | |
Software signal |
Mechanical link | |
Hydraulic signal |
Pneumatic signal | Valve P&ID symbols 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 |
Normally Closed Gate Valve |
Ball Valve | | --- | --- | --- | |
Normally Closed Ball Valve |
Globe Valve |
Butterfly Valve | |
Check Valve |
Plug Valve |
Needle Valve | |
Self-Draining Valve |
Integrated Block and Bleed Valve |
Angle Valve | | --- | --- | --- | |
Angle Globe Valve |
3-way Valve |
4-way valve | |
Angle Blowdown Valve |
Plug valve |
Y Valve | Storage tanks / vessels P&ID symbols Commonly used P&ID (Piping and Instrumentation Diagram) symbols for storage tanks and process vessels or drums. Note that they may differ slightly from one project to another. |
Horizontal Vessel / drum |
Vertical vessel / drum |
Vertical vessel with mesh pad | | --- | --- | --- | |
Horizontal vessel with boot |
Horizontal vessel with weir |
Horizontal vessel with coalescer | | --- | --- | --- | |
Conical roof tank |
Conical roof tank with boot |
Floating roof tank | |
Spherical storage tank |
Flat roof tank |
Dome roof tank | |
Sedimentation tank |
Fixed internal floating roof tank |
Man way | |
Vortex breaker |
Concrete sump |
Oil skimmer | |
Vertical pig trap |
Horizontal pig trap | | | --- | --- | --- | | | | | P&ID symbols for control valve and actuators Commonly used P&ID symbols (Piping and Instrumentation Diagram symbols) for control valve actuators. Note that they may differ slightly from one project to another. |
Control valve assembly |
Manual (hand wheel) |
Diaphragm actuator | | --- | --- | --- | |
Balanced diaphragm actuator

FAQs

Which P&ID symbols are covered for safety valves?

Safety valve symbols include pressure relief valves, vacuum relief valves, breathing/pressure-vacuum relief valves, and pressure or vacuum rupture discs.

What heat exchanger symbol types are listed?

The document lists common heat exchanger types such as air coolers, generic heat exchangers, plate and frame units, double pipe U-tube exchangers, kettle type, shell-and-tube exchangers, fired heaters, and electrical heaters.

What instrument signal and valve symbol categories are included?

Instrument signal symbols include process connections plus electric, software, mechanical, hydraulic, and pneumatic signals. Valve symbols cover multiple manual valve types including gate, ball, globe, butterfly, check, plug, needle, and several specialized variants.

Nov 1, 2026

Uploaded by Jiven