Product Overview
The BUCHER HYDRAULICS QX31-020R97 (Material Number: 022539400) is a high-precision internal gear pump engineered for demanding industrial hydraulic systems. Manufactured by Bucher Hydraulics, a global leader in hydraulic drive and control technology, this unit operates on the proven internal gear principle, utilizing a rotating inner gear and a stationary outer ring gear to create a sealed displacement volume. This design is renowned for delivering exceptionally smooth, low-pulsation flow, making it an ideal choice for applications requiring precise volumetric control and quiet operation. The QX series is a direct-fit replacement for original equipment, ensuring seamless integration into existing hydraulic power units, lubrication systems, and industrial machinery.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Internal Gear Pump |
| Model Designation | QX31-020R97 / 022539400 |
| Operating Pressure | Standard Industrial Grade (Up to 250 bar continuous, 280 bar peak) |
| Mounting & Connection | Standard ISO 4-Hole Flange / Manufacturer Interface |
| Displacement | 20 cm³/rev (Nominal) |
| Rotation Direction | Clockwise (Standard) |
Engineering Features & Advantages
- Precision Performance: The internal gear design ensures low pulsation and minimal noise emission, providing a stable and consistent flow rate essential for precision hydraulic circuits and sensitive lubrication applications.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, featuring high-quality bearing materials and a robust casing that withstands high pressure and thermal loads.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original OEM standards, allowing for quick drop-in replacement without the need for system modifications or adapter plates.
- High Suction Performance: The geometry of the internal gear set provides excellent suction characteristics, preventing cavitation even at high speeds and with viscous fluids.
Typical Industrial Applications
This internal gear pump is widely utilized in heavy industrial scenarios including plastic injection molding machines, metallurgical presses, construction and marine hydraulics, CNC machine tools, and centralized lubrication systems where reliable, low-noise fluid delivery is critical.
PRODUCT IMAGES




BUCHER HYDRAULICS QX31-020R97 / 022539400 Internal Gear Pump
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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