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Program Topics:
Hydraulic Principles
- Energy
- Inertia
- Pressure
- Force
- Flow
- Horse Power
Hydraulic Symbols
Two Common Misconceptions
Pumps
- Non-positive displacement
- Positive displacement, principal of operation
- Common fixed positive displacement pumps
Gear
Vane
Piston
Cylinders, Single and Double Acting
- Effect of differential area on force and speed
Need for Pressure Control
- Direct acting pressurerelief valves
- Direct acting pressurereducing
valve
Speed Control Valves
- Simple flow control valves
Direct Acting Directional Control
- Valves
- Two way, three way
- Four way,twoand three position
- Common valve actuators
Check Valves
Accumulators
- Types
- Applications
- Safety considerations
- Simplified accumulator sizing
Hydraulic Pumps
- Efficiency, volumetric & overall
- Variable volume pumps
- Pressure compensation
- Selecting motor to drive a pump
- Effect of driver speed
- Horse power requirement
Actuators
- Hydraulic motors
- 2:1 Cylinders
- Pressure intensification
- Regeneration
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Pressure and Temperature
- Compensated Flow Control
- Valves
Placement of Flow Control Valves in a Circuit
- Meter in
- Meter out
- Bypass
- Priority
Pilot Operated Directional Control Valves
Pilot Operated Check Valves
Pressure and Load Control
- Unloading valves
- Accumulator circuit
- Hi-Lo circuit
- Sequence valves
- Counterbalance valves
- Over center valves
- Accumulator dischargeunloaing valve
- Need for, and operation of, pilot operated pressure controls
Causes & Effects of High Pump Inlet Vacuum and Suction Leaks
- Cavitation
- Pseudo-cavitation
- Other causes of air entrainment
Fluid Conductors and Conductor Sizing
Fluid Conditioning
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