Product Overview
The BUCHER QX21-016/23-006/23-006R-O (Part No. 100027554) is a high-precision internal gear pump engineered by Bucher Hydraulics for demanding industrial hydraulic systems. Operating on the proven internal gear principle, this unit features a pinion-driven internal gear set that rotates within a fixed ring gear, creating a sealed displacement chamber that delivers smooth, pulsation-free flow across the full operating range. The QX series is specifically designed for low-noise, high-efficiency performance, making it an ideal choice for applications requiring precise flow control and long service life. This particular configuration incorporates a multi-section design (016/006/006) with a rear outlet orientation (R-O), allowing for flexible integration into compact manifold and multi-circuit hydraulic power units.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Hydraulic Internal Gear Pump (Multi-Section) |
| Model Designation | QX21-016/23-006/23-006R-O / 100027554 |
| Displacement Configuration | Three-stage: 16 cm³/rev + 6 cm³/rev + 6 cm³/rev (nominal) |
| Operating Pressure | Continuous up to 210 bar / Peak up to 250 bar (standard QX series rating) |
| Speed Range | 500 – 3,600 RPM (dependent on fluid viscosity and pressure) |
| Mounting & Connection | Standard SAE / ISO 4-bolt flange; rear outlet (R-O) port orientation |
| Rotation Direction | Clockwise (viewed from shaft end) – standard configuration |
| Hydraulic Fluid | Mineral oil HL/HLP per DIN 51524; viscosity 10–300 mm²/s |
Engineering Features & Advantages
- Precision Internal Gear Performance: The pinion and internal gear set is manufactured to micron-level tolerances, ensuring minimal internal leakage, high volumetric efficiency, and exceptionally smooth flow with very low pressure pulsation.
- Low-Noise Operation: The internal gear principle inherently reduces noise and vibration compared to external gear or piston designs, making the QX21 ideal for noise-sensitive industrial environments.
- Multi-Section Versatility: The 016/006/006 configuration provides three independent flow outputs from a single drive shaft, enabling compact multi-circuit hydraulic systems without additional pumps.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust bearing and sealing systems that extend service intervals.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original BUCHER OEM standards, ensuring drop-in replacement without modification.
Typical Industrial Applications
This BUCHER internal gear pump is widely deployed in plastic injection molding machines, metallurgical presses, CNC
PRODUCT IMAGES
BUCHER QX21-016/23-006/23-006R-O / 100027554 Internal Gear Pump
âš¡ 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.
Shop the genuine BUCHER QX21-016/23-006/23-006R-O / 100027554 Solenoid Directional Valve. This Germany-made 24V DC hydraulic component features a 4/3-way design with spring return, delivering leak-free, reliable fluid control for heavy-duty industrial systems.