Custom Hydraulic System Design Requirements

A stable hydraulic system is not built by simply assembling a pump, valves, cylinders and an oil tank. For industrial equipment, a custom hydraulic system must be designed according to the real working conditions, load, pressure, flow, duty cycle, control method and operating environment. Good design helps the machine achieve stable pressure, smooth movement, controlled oil temperature and long service life.

1. Working Condition Analysis

Before designing a hydraulic power unit or hydraulic station, the basic data should be confirmed: machine type, application, load, working pressure, peak pressure, actuator speed, cylinder stroke, motor speed, working frequency, continuous running time, ambient temperature, installation space and control requirements. Press machines, lifting equipment, metallurgy machinery, mining equipment, plastic machinery and automation lines all require different hydraulic solutions.

2. Pressure and Flow Calculation

System pressure should be calculated from the required actuator force, not selected blindly. Cylinder force depends on effective piston area and working pressure, with allowance for friction, side load and safety margin. Pump flow should be calculated according to cylinder speed, hydraulic motor speed and machine cycle time. If several actions work at the same time, total flow and motor power must be checked to avoid slow movement, high temperature or wasted energy.

3. Hydraulic Pump Selection

The hydraulic pump should match pressure level, displacement, speed, efficiency, noise and service conditions. Gear pumps are often used for medium and low pressure systems. Vane pumps are suitable for stable flow and lower-noise industrial hydraulic units. Piston pumps are suitable for high pressure, high power or variable displacement systems. When selecting a pump, displacement, rotation direction, shaft type, mounting flange, port position and suction condition should be confirmed.

4. Valve Block and Control Design

The hydraulic valve block should provide direction control, pressure control, flow control and safety protection. Directional valves must match system flow. Relief valves protect maximum pressure. Throttle valves, flow control valves, proportional valves or servo valves are selected according to speed and accuracy requirements. For load holding, synchronized movement, fast down movement or heavy lifting, pilot operated check valves, counterbalance valves and safety circuits should be considered.

5. Cylinder and Actuator Requirements

Hydraulic cylinders should be designed according to force, speed, stroke, mounting style and working environment. Bore diameter, rod diameter, stroke, seal type, guiding structure, cushioning and connection method must be confirmed. For long stroke or heavy-duty cylinders, rod stability and guide wear resistance are important. For frequent operation, seal life and oil cleanliness directly affect reliability.

6. Oil Tank, Filtration and Cooling

The oil tank should have enough effective volume and proper separation between suction and return areas. Level gauge, temperature gauge, air breather, drain port and cleaning access should be included. Filtration accuracy must match pump and valve requirements. Systems with proportional valves, servo valves or long continuous operation need higher oil cleanliness. Air cooling or water cooling should be selected when heat generation is high.

7. Piping and Connection

The suction pipe should be short and large enough to avoid air leakage and cavitation. Pressure pipes must meet the rated pressure. Return pipes should avoid excessive back pressure. Drain lines should return to tank separately when required. Pipes and fittings must be cleaned before assembly to prevent metal chips, welding slag and dust from entering the system. Proper pipe clamps reduce vibration and leakage risk.

8. Electrical Control and Safety

A custom hydraulic system may use manual, solenoid, PLC, proportional or servo control. Electrical design should include motor protection, pressure monitoring, oil temperature alarm, oil level alarm, emergency stop and action interlock. For heavy load, pressure holding, synchronized lifting and automatic equipment, safety logic should be designed together with the hydraulic circuit.

9. Testing and Commissioning

After assembly, the system should be checked step by step: motor rotation, pump suction, pressure setting, valve action, actuator speed, oil temperature, noise, leakage, pipe vibration and electrical logic. Pressure should be increased gradually during commissioning. Final inspection should record pressure, flow, temperature, running status and problem-solving results.

YUYOU Hydraulics provides custom hydraulic system design, hydraulic power unit manufacturing, pump and valve selection, hydraulic cylinder matching and hydraulic system upgrade support for global industrial equipment. The design focus is practical engineering: correct calculation, reliable components, clean assembly, careful testing and long-term maintainability.