Sumitomo Truninger QT-42-20HS-A Internal Gear Pump

The Sumitomo Truninger QT-42-20HS-A Internal Gear Pump is a hydraulic pump used in industrial fluid power systems. It is identified by the QT-42-20HS-A model reference. Internal gear pumps are known for smooth operation, low noise and stable pressure output. This pump is suitable for injection molding machines, machine tools, presses and other equipment that requires reliable hydraulic flow.

Internal Gear Pump Principle

An internal gear pump uses an outer ring gear and an inner gear. The inner gear is driven by the shaft. As the gears rotate, the space between the teeth changes. Fluid is drawn in as the space increases and pushed out as the space decreases. A crescent shaped filler separates the suction and pressure sides. This design provides smooth flow and good suction performance.

Performance Characteristics

Internal gear pumps offer low pulsation and quiet operation. They can handle a range of viscosities and maintain stable pressure. The QT series is designed for industrial duty and reliable performance. The exact flow and pressure depend on the pump size, speed and system setting. Users should compare the required flow, pressure and duty cycle with the pump rating.

Applications

Typical applications include injection molding machines, hydraulic presses, machine tools, die casting machines, testing equipment and industrial power units. The pump is suitable for systems that require smooth hydraulic flow and dependable pressure. It can be used in new equipment or as a replacement in compatible systems.

Installation Notes

Installation should follow the pump manual and system drawings. The mounting flange and shaft coupling must be aligned carefully. Misalignment can cause noise, vibration and bearing wear. Suction lines should be sized to avoid cavitation. The pump should be filled with clean hydraulic oil before startup. Rotation direction should be checked before connecting the load.

Maintenance

Hydraulic pumps require clean oil and proper filtration. Contaminated oil can wear internal parts and reduce efficiency. Filters should be changed according to schedule. Leaks around seals and fittings should be repaired promptly. The pump should be operated within its rated pressure and speed. Noise, vibration and temperature should be monitored for signs of wear.

Conclusion

The Sumitomo Truninger QT-42-20HS-A Internal Gear Pump is a reliable hydraulic component for industrial systems. It provides low pulsation, stable pressure and smooth operation. Correct installation, clean oil and regular maintenance help ensure long service life.