| AHHV1 | 25028 | Hydraulics- Valves 1 |
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Performance Objectives:
Pass
Fail
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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