The 0PUA*B0 Series Hydraulic Gear Pump is a compact Group 0 external gear pump designed for miniature hydraulic systems requiring stable flow, lightweight construction, and reliable performance. With a precision-machined gear set, high-strength aluminum housing, and pressure-balanced design, the pump delivers high volumetric efficiency, low noise operation, and long service life.
The 0PUA*B0 Series is particularly suitable for compact hydraulic power units, lifting equipment, agricultural machinery, mobile hydraulic systems, lubrication systems, and industrial automation applications where installation space is limited. Similar Group 0 gear pumps are widely used in mini hydraulic power packs because of their compact size and high-speed capability.
| Type | Displacement | Max pressure | Max.Speed | Min.Speed |
| P1 | P2 | P3 | 31.5 Mpa | |
| (cm³/rev) | bar | bar | bar | (r/min) | (r/min) |
| 0PUA-0.19-D*B0 | 0.19 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUA-0.26-D*B0 | 0.26 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUA-0.38-D*B0 | 0.38 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUA-0.50-D*B0 | 0.50 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUA-0.65-D*B0 | 0.65 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUA-0.75-D*B0 | 0.75 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUA-0.88-D*B0 | 0.88 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUA-1.00-D*B0 | 1.00 | 200 | 230 | 250 | 6000 | 850 |
| 0PUA-1.25-D*B0 | 1.25 | 200 | 230 | 250 | 5000 | 700 |
| 0PUA-1.50-D*B0 | 1.50 | 200 | 230 | 250 | 4000 | 600 |
| 0PUA-1.75-D*B0 | 1.75 | 180 | 210 | 230 | 4000 | 600 |
| 0PUA-2.00-D*B0 | 2.00 | 180 | 190 | 210 | 3000 | 500 |
Working Principle
The 0PUA*B0 Series operates according to the positive displacement principle:
- Hydraulic oil enters the inlet port.
- The drive shaft rotates the driving gear.
- The driven gear rotates simultaneously.
- Oil is carried around the outer circumference of the gears.
- The meshing gears force the oil into the outlet chamber.
- Pressurized hydraulic oil is continuously supplied to the hydraulic system.
This design ensures smooth, efficient, and reliable hydraulic power transmission. External gear pumps are known for their simple structure, reliability, and ease of maintenance.
Product Features
- Compact Group 0 external gear pump design
- Lightweight aluminum alloy housing
- High volumetric and mechanical efficiency
- Stable flow and pressure output
- Precision-machined alloy steel gears
- Low noise and low vibration operation
- Excellent suction characteristics
- High-speed operating capability
- Multiple displacement options available
- Clockwise or counterclockwise rotation available
- Easy installation and maintenance
- Long service life