1.Directional Control Circuits

Sequence Action Circuits

1.1.1 Reversing circuit using a manual directional/reversing valve.

1.1.2 Reversing circuit controlled by a pilot-oriented pressure relief valve/overflow valve.

Lock Circuits

1.3.1 Lock circuit featuring a mid-position function solenoid reversing valve.

1.3.2 Lock circuit using a pilot check valve.

2.Pressure Control Circuits

Pressure Regulating Circuits

2.1.1 Standard pressure regulating circuit.

2.1.2 Two-stage pressure regulated circuit.

Booster Circuits

2.3.1 Booster circuit using a booster cylinder.

Pressure Relief Circuits

2.4.1 Pressure relief circuit utilizing a reversing valve.

3.Speed Control Circuits

Throttle Speed Regulating Circuits

3.1.1 Oil-inlet throttle speed regulating circuit.

3.1.2 Oil-return/back throttle speed regulating circuit.

Speed Shift Circuits

3.2.1 Speed shift circuit using a flow valve.

Synchronization Circuits

3.3.1 Synchronization circuit involving series hydraulic cylinders.

4.Excavator Training Contents

Excavator Hydraulic Circuits

4.1.1 Demonstration of mining, discharging, lifting, and other actions using a physical excavator.

4.1.2 Understanding hydraulic system components, working principles, and internal structure.

4.1.3 Disassembly and assembly of an excavator’s hydraulic system.

4.1.4 Electrical control system circuit experiments for excavators.

4.1.5 Measurement of parameters such as pressure and flow in the excavator hydraulic system during experiments.