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

sliding spool valves

Construction and Operation, Advantages, Applications

The sliding-spool valves are the most frequently used type in hydraulic systems.

SLIDING SPOOL VALVES

The sliding-spool valves are the most frequently used type in hydraulic systems.

1. Construction and Operation

Fig.6.2 illustrate a typical sliding spool valve. A spool moves horizontally within the valve body to control the flow. The raised areas called 'lands' block or open port to give the required operation.


In Fig.6.2(a), the fluid supply is connected to port 1 and now port 3 is in closed position. Thus the flow is permitted from port 1 to port 2. In Fig.6.2(b), when the spool is moved to the left, the fluid supply is cut off and port 2 is connected to port 3. Thus the flow is permitted from port 2 to port 3.

2. Advantages of Sliding-Spool Valves

(i) Different operations can be achieved with a common body and different spool.

(ii) Reduced manufacturing cost.

(iii) Reduced fluid leakage rate.

(iv) All types of actuation are easily adaptable.

3. Applications of Sliding-Spool Valves

They are used for high pressure applications.

Hydraulics and Pneumatics: Unit II: Hydraulic Actuators and Control Components : Tag: : Construction and Operation, Advantages, Applications - sliding spool valves


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Hydraulics and Pneumatics

ME3492 4th semester Mechanical Dept | 2021 Regulation | 4th Semester Mechanical Dept 2021 Regulation