FLUID POWER P&IDs

P&ID Print Reading Example Summary

Reservoirs

Engineering Symbology Prints and Drawings Volume 1 of 2
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Engineering Fluid Diagrams and Prints DOE-HDBK-1016/1-93 FLUID POWER P&IDs FLUID POWER P&IDs Fluid power diagrams and schematics require an independent review because they use a unique set of symbols and conventions. EO 1.11 IDENTIFY the symbols used on engineering fluid power drawings for the following components: a. Pump d. Actuators b. Compressor e. Piping and piping junctions c. Reservoir f. Valves EO 1.12 Given a fluid power type drawing, DETERMINE the operation or resultant action of the stated component when hydraulic pressure is applied/removed. Fluid Power Diagrams and Schematics Different symbology is used when dealing with systems that operate with fluid power. Fluid power includes either gas (such as air) or hydraulic (such as water or oil) motive media. Some of the symbols used in fluid power systems are the same or similar to those already discussed, but many are entirely different. Figure 19 Fluid Power Pump and Compressor Symbols Fluid power systems are divided into five basic parts: pumps, reservoirs, actuators, valves, and lines. Pumps In the broad area of fluid power, two categories of pump symbols are used, depending on the motive media being used (i.e., hydraulic or pneumatic). The basic symbol for the pump is a circle containing one or more arrow heads indicating the direction(s) of flow with the points of the arrows in contact with the circle. Hydraulic pumps are shown by solid arrow heads. Pneumatic compressors are represented by hollow arrow heads. Figure 19 provides common symbols used for pumps (hydraulic) and compressors (pneumatic) in fluid power diagrams. Rev. 0 PR-02 Page 23

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