Parameter Description of Sumitomo Gear Pumps QT53-63/QT63-80/QT63-100

General Overview

1. Model QT53-63

1.1 Model Interpretation

• QT: Series identifier, indicating the QT series internal gear pump, adopting advanced internal meshing gear technology and precision manufacturing process.
• 53: Size grade, specifying the pump’s medium-small structural size and matching corresponding installation dimension standard, suitable for medium-compact equipment layout.
• 63: Displacement specification, representing a theoretical displacement of 63 cm³ per revolution (cm³/rev), belonging to the medium displacement range of the QT series.

1.2 Core Technical Parameters

1.3 Performance Characteristics

• High Efficiency: Adopts precision internal meshing gears and optimized flow channel design, with volumetric efficiency up to 95% and overall efficiency up to 90%, effectively reducing energy consumption.
• Low Noise & Low Pulsation: The internal meshing structure and gear tooth profile optimization minimize flow pulsation and operating noise, ensuring quiet operation in equipment.
• Reliable Durability: Made of high-strength alloy materials and subjected to strict heat treatment, the pump has excellent wear resistance and corrosion resistance, ensuring long service life under rated working conditions.
• Easy Maintenance: Compact structural design, convenient disassembly and assembly, and easy access to key components, reducing maintenance time and costs.

2. Model QT63-80

2.1 Model Interpretation

• QT: Series identifier, indicating the QT series internal gear pump, inheriting the series’ advantages of high efficiency and reliability.
• 63: Size grade, specifying the pump’s medium structural size, larger than the 53 size grade, matching corresponding installation dimension standard for medium-sized equipment.
• 80: Displacement specification, representing a theoretical displacement of 80 cm³ per revolution (cm³/rev), larger than the QT53-63, belonging to the medium-large displacement range of the QT series.

2.2 Core Technical Parameters

2.3 Performance Characteristics

• High Flow & Stable Output: With a displacement of 80 cm³/rev, it provides larger flow output, and the optimized gear design ensures stable flow and pressure, adapting to medium-large flow hydraulic system requirements.
• High Pressure Resistance: The reinforced pump body structure and precision assembly ensure stable operation under rated pressure of 21 MPa and maximum pressure of 25 MPa, with strong load-bearing capacity.
• Low Noise Operation: The internal meshing gear structure and advanced noise reduction design effectively reduce operating noise, meeting the noise requirements of high-precision equipment.
• Strong Adaptability: Suitable for a variety of hydraulic oils, with good adaptability to different working temperatures and working conditions, ensuring reliable operation in harsh environments.

3. Model QT63-100

3.1 Model Interpretation

• QT: Series identifier, indicating the QT series internal gear pump, maintaining the series’ high-quality and high-reliability characteristics.
• 63: Size grade, same as QT63-80, specifying the pump’s medium structural size, matching medium-sized equipment installation dimensions.
• 100: Displacement specification, representing a theoretical displacement of 100 cm³ per revolution (cm³/rev), the largest displacement among the three models, belonging to the large displacement range of the QT series.

3.2 Core Technical Parameters

3.3 Performance Characteristics

• Large Flow Output: With a displacement of 100 cm³/rev, it provides large flow hydraulic output, suitable for hydraulic systems requiring high flow and stable pressure.
• High Reliability: The thickened pump body, high-strength gears and precision bearing design ensure stable operation under long-term high-load conditions, with low failure rate.
• Energy-Saving & Efficient: The optimized hydraulic structure reduces internal leakage, improves volumetric efficiency, and effectively saves energy during long-term operation.
• Easy Installation & Maintenance: The consistent installation dimension with QT63-80 facilitates replacement and maintenance, reducing equipment downtime.

4. Common Operating Requirements (Applicable to All Three Models)

• Hydraulic Fluid: Recommended to use R&O type and wear-resistant hydraulic oil with ISO VG 32 to 68 (viscosity index ≥ 90). The kinematic viscosity during operation should be 20 to 150 mm²/s to ensure stable operation of the pump.
• Operating Temperature: The ambient temperature range is 0 to 60℃ (32 to 140℉), and the hydraulic oil temperature range is -40 to 65℃ (40 to 149℉). Preheat at low pressure when the startup oil temperature is below -40℃ until it reaches the normal operating temperature.
• Suction Conditions: The suction pressure should be 0.02 to 0.3 MPa (2.9 to 44 psi), and the flow rate at the suction port should be greater than 1.83 m/s (6 ft/sec). A suction strainer with 100 µm (150 mesh) filtering grade is recommended, and a 25 µm line filter should be installed in the return line to protect the pump components.
• Contamination Control: The hydraulic fluid contamination level should be maintained at NAS 10 or lower, avoiding contamination by water and other impurities. Check the fluid color and cleanliness regularly to prevent air or dirt contamination.
• Installation Notes: Install the pump with the shaft horizontally, avoiding radial or thrust loads on the shaft end from pulleys or gears. Bleed air from the pump and pipelines through inching operation (start-stop) during startup to ensure smooth operation. Check for abnormal noise, vibration and leakage during trial operation.

5. Application Scope

• QT53-63: Suitable for medium-small flow hydraulic systems, such as small and medium-sized construction machinery, precision machine tools, hydraulic power units and light industrial equipment.
• QT63-80: Suitable for medium-large flow hydraulic systems, such as medium-sized construction machinery, industrial hydraulic equipment, plastic machinery and metallurgical equipment.
• QT63-100: Suitable for large flow hydraulic systems, such as large-scale construction machinery, heavy industrial equipment, hydraulic stations and mining machinery, especially scenarios requiring high flow and medium pressure output.