Hydraulic Symbols - SkillsCommons

Hydraulic Symbols - SkillsCommons

Hydraulic Symbols Piping and Tubing Symbols Normal working line Flexible working line Pilot line Drain line Enclosure outline Direction of flow Crossing lines

Joining lines Reservoirs Open Sealed Reservoir Connecting lines above fluid level Connecting lines below fluid level Basic filter/strainer

Separator Manual Automatic Filter-separator Fluid conditioning symbols are a diamond shape Cooler

Liquid Gaseous Heater Temperature controlled Pressure Temperature Flow meter, rate

Float switch Flow meter, totalizing Nozzle Pressure Switch Pumps Fixed displacement Unidirectional Bidirectional Variable displacement, non-compensated,

unidirectional Variable displacement, non-compensated, bidirectional Pumps Variable displacement, pressure-compensated, unidirectional Variable displacement, pressure-compensated, bidirectional

M Electric Motor Internal combustion Motors Fixed displacement, unidirectional Fixed displacement, bidirectional

Variable displacement, unidirectional Variable displacement, bidirectional Valves Normally closed, two-way, two port Normally closed, two-way, two position, two port

Normally closed, four way, three position, four port Valves Normally open, two-way, two position, two port Normally open, two-way, three position, three port Normally

Normallyopen, open,four fourway, way,infinite three position, position, four four port port Relief Valve Spring loaded

Valve normally closed Variable Pressure Side Valve is regulated by the feed pressure When open, goes to tank

Represents the pilot line Pressure Reducing Valve Spring loaded Variable Pressure Side Discharge side goes to line Represents the pilot line Valve normally open

Valve is regulated by the discharge pressure Valves Relief Valve Sequencing Valve Pressure Reducing/Regulating

Valve Valves Orifice V Timing logic Check valve Valves Flow control with bypass,

pressure compensated Flow control with bypass, pressure and temperature compensated Valves Counterbalance Valve Unloading Valve Controls Push Button

Liquid pilot Lever Gas pilot Pedal Servo Cam

Pilot or solenoid Solenoid Pilot and solenoid activated, spring return Cylinders Single acting Double acting

Single acting, spring return Double acting, double rod Double acting, single cushion Double acting, Double cushion Double acting,

double adjustable cushion Telescoping Ram Pressure intensifier This workforce solution was funded by a grant awarded by the U.S. Department of Labors Employment and Training Administration. The solution was created by the grantee and does not necessarily reflect the official position of the U.S. Department of Labor. The Department of Labor makes no guarantees, warranties, or

assurances of any kind, express or implied, with respect to such information, including any information on linked sites, but not limited to accuracy of the information or its completeness, timeliness, usefulness, adequacy, continued availability or ownership. This work is licensed under a Creative Commons CC BY 3.0 Unported License. http://creativecommons.org/licenses/by/3.0/

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