Hydraulic Pneumatic Circuit Symbols

The symbols shown below are generally based on
BS 2917-1:1993, ISO 1219-1:1991.Graphic symbols and circuit diagrams for fluid power systems and components. Specification for graphic symbols
Note: This is one standard identified by two numbers.

For information on production of circuit diagrams refer to
BS ISO 1219:1995..Fluid power systems and components. Graphic symbols and circuit diagrams. Circuit diagrams


Diagrams of pneumatic and hydraulic components are produced using these symbols as building block combining functional symbols with symbols for variability and operation ...

Following are examples of the basic symbols

Following are typical symbols associated with Valve Operators

Following are typical symbols associated with Pumps and Motors

Following are typical symbols associated with Instruments

Following are typical symbols associated with Air Conditioning Units

Following are typical symbols associated with Fluid Cylinders

Following are typical symbols associated with Fluid System Pressurisation