Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components

directional control valves

Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

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Directional controls valves are used to determine the path of the fluid through which it should travel within a given circuit.

DIRECTIONAL CONTROL VALVES

• Directional controls valves are used to determine the path of the fluid through which it should travel within a given circuit.

• Directional control valves are shown by means of several connected squares.

Number of squares - Indicates the number of switching positions possible.

Arrow within square - Indicate the flow direction.

Lines - Indicate how the ports are inter-connected in the various switching positions.

• Naming convention for valve: Number of ports / Number of switching positions "-way valve".

Example: 4/3 valve has 4 ports and 3 switching positions.

• Table 7.3 presents the various standard symbols used for directional control valves.

Table 7.3. Graphic symbols used for directional control valves

Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components : Tag: : Hydraulic Actuators and Control Components - Hydraulics and Pneumatics - directional control valves

Home | Department: Mech Department | Subject: Hydraulics and Pneumatics |

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Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components

Hydraulic Actuators: The Transmitter - Introduction, Learning Objectives

linear actuators (or hydraulic cylinders) - What are Linear Actuators?, Types,

single-acting cylinders

double-acting cylinders - What are Double-Acting Cylinders?, Construction, Operation

cylinder cushioning - What is Meant by Cylinder Cushion ?, Construction and Operation,

special hydraulic cylinders telescopic cylinder - What is a Telescopic Cylinder?, Construction and Operation, Working of a Two-Stage Double-Acting Telescopic Cylinder

Tandem Cylinders - What is a Tandem Cylinder?, Construction and Operation, Dual Linear Actuator

double-rod and rodless cylinders - Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

cylinder mountings - Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

rotary actuators (or hydraulic motors) - Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

gear motors - Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

vane motors - Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

piston motors - Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

limited-rotation hydraulic motors - What are Limited-Rotation Hydraulic Motors?, Vane Type Limited-Rotation Motors

hydraulic motor performance - Hydraulic Actuators and Control Components - Hydraulics and Pneumatics

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