AHHV1 25028 Hydraulics- Valves 1

 

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Topic 1: Valve Basics

1.1  Define flow and describe its function in a hydraulic system.

1.2  Define pressure and describe its function in a hydraulic
system.

1.3  Describe the functions of valves in a hydraulic system.

1.4  Explain what is meant by “throttling.”

1.5  Identify and describe the following types of manually
adjusted valves: needle valve, globe valve, plug valve,
ball valve, and gate valve.

 

Topic 2: Actuated Valves

2.1 Identify and describe the main components of a typical
      directional control sliding spool valve, and explain or
      demonstrate how this type of valve is positioned.

2.2 Identify and describe the following types of actuated
      valves: check valve, relief valve, and pressure reducing
      valve.

2.3 Define cracking pressure and pressure override.

2.4 Identify examples of manually actuated, solenoid-
      controlled, and pilot-operated valves.

2.5 Explain the difference between a standard solenoid
      and a proportional solenoid.

2.6 Describe the basic operation of a servo system.

2.7 Describe the basic operation of a pilot-operated valve.

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