Many types of valves are required in a process plant for flow regulation or on/off purpose. Type of valve employed depends on nature of fluid, flow control required, operating pressure and temperatures as well as surround atmosphere. Here is a list of symbols for various types of valves used in process industry.
 | Angle Blowdown Valve |
 | Angle Globe Valve |
 | Angle Valve |
 | Angle Valve Hand Operated |
 | Auto Circulation Valve |
 | Back Pressure Regulator |
 | Balanced Diaphragm Gate Valve |
 | Ball Valve |
 | Ball Valve Normally Closed |
 | Bleeder Valve |
 | Butterfly Valve |
 | Check Valve 01 |
 | Check Valve 02 |
 | Control Valve |
 | Diaphragm Valve 01 |
 | Diaphragm Valve 02 |
 | Electro Hydraulic Valve |
 | Excess Flow Valve |
 | Flanged Valve 01 |
 | Flanged Valve 02 |
 | Float Operated Valve |
 | Four Way Plug Valve |
 | Four Way Valve |
 | Gate Valve |
 | Gate Valve Closed |
 | Gate Valve Hand Operated |
 | Gauge Valve |
 | Globe Valve |
 | Globe Valve Hand Operated |
 | Hydraulic Valve |
 | Integrated Block Valve |
 | Knife Valve |
 | Manual Integrated Valve |
 | Metering Choke |
 | Minimum Flow Valve |
 | Motor Operated Valve |
| Motor Operated Valve |
 | Needle Valve 01 |
 | Needle Valve 02 |
 | Orifices |
 | Pilot Gate Valve |
 | Pinch Valve |
 | Piston Operated Valve |
 | Plug Valve 01 |
 | Plug Valve 02 |
 | Post Indicator |
 | Powered Valve |
 | Quarter Turn Double Acting Valve |
 | Quarter Turn Spring Acting Valve |
 | Ram Valve |
 | Relief Valve |
 | Rotary Valve |
 | Self Draining Valve |
 | Self Operating Release Valve |
 | Slide Valve |
 | Solenoid Valve |
 | Spring Gate Valve |
 | Three Way Plug Valve |
 | Three Way Valve 01 |
 | Three Way Valve 02 |
 | Water Flow Meter |
 | Weight Gate Valve |
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