HYDRAULIC SYMBOLS

As per DIN-ISO 1219 (1978)

As per ISO – 1219-1 (1991)

Simple Hydraulic Circuit

Symbols of Hydraulic Pumps & MotorsHydraulic ActuatorsDirectional Control ValvesPressure Control ValvesFlow Control ValvesCheck ValvesAccessories

Pumps and Motors

Function

Pump: Conversion of Mechanical to Hydraulic Energy

Hydraulic Motor: Conversion of Hydraulic Energy in to Mechanical Energy of Rotation

Fixed & Variable Displacement Pumps

Pump Actuation

With Electric Motor

Fixed & Variable Displacement Motors

Hydraulic Actuators

Function

Hydraulic Motor: Conversion of Hydraulic Energy in to Mechanical Energy of

Rotation

Hydraulic Cylinder: Conversion of Hydraulic Energy in to Mechanical in

the Form of Linear Motion

Hydraulic Cylinders

Direction Control Valves

FunctionOpen or Close Various Flow PathsDesignated by number of ports &

Switching PositionsEx. 4/3 DC Valve

4/3 Direction Control Valve

Direction Control Valves

DC Valve Switching Mechanism

Central Positions

Pilot Operated DC Valve

Pressure Control Valves

FunctionTo Control Pressure in the systemProtects the system from high pressure

Pressure Relief Valve

Pressure Relief Valve

Pressure Reducing Valve

Sequence Valve

Flow Control Valves

FunctionTo regulate Volumetric Flow Rate

Throttle Valve

Flow Control Valves

Application of FCV

Check Valve

FunctionAllows flow only in one Direction

Check Valve

Accessories

Questions?

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