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Symbols used in Pneumatic / Hydraulic Circuit diagrams


Introduction

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 ...


Basic Symbols

Following are examples of the basic symbols






Valve Operators

Following are typical symbols associated with Valve Operators



Valve Operators -2

Energy Conversion Devices

Following are typical symbols associated with Pumps and Motors




Instruments

Following are typical symbols associated with Instruments

Instruments



Fluid Conditioning

Following are typical symbols associated with Air Conditioning Units

Air Conditioning



Fluid Cylinders

Following are typical symbols associated with Fluid Cylinders

Fluid Cylinders



System Pressurisation

Following are typical symbols associated with Fluid System Pressurisation

System Pressurisatio9n

Links Providing information on Drawing Diagrams and Symbols
  1. Basic Symbols ... Single page of symbols
  2. Hydraulics and Pneumatics ... Detailed set of symbols .

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Last Updated 19/01/2013