HPLPA373 Bondioli Gear Pump High Pressure Aluminum

Product Overview:

The HPLPA373SW4G8G7B00 BHY, HPLPA226SMNG7G6BHY and HPLPB226SMNG6G6BAD belong to the Bondioli & Pavesi (HP Hydraulic) HPL series of aluminum-body external gear pumps. Fixed-displacement design featuring a high-strength aluminum housing, engineered for medium- to high-pressure mobile and industrial hydraulic systems. Lightweight construction, low noise and high volumetric efficiency. Fully interchangeable with original Bondioli mounting dimensions, shaft ends, flanges and ports – true drop-in replacement. Every unit undergoes 100% simulated operating-condition testing to guarantee reliable output under rated pressure and speed. Ideal for OEMs and aftermarket applications demanding interchangeability, weight reduction and consistency.

Technical Specifications 

• Models: HPLPA373SW4G8G7B00 BHY, HPLPA226SMNG7G6BHY, HPLPB226SMNG6G6BAD (HPLPA / HPLPB series)
• Brand: Bondioli & Pavesi (HP Hydraulic)
• Type: High-performance external gear pump (fixed displacement, single or modular multiple)
• Displacement: HPLPA Group 2 approx. 4.5–40.5 cm³/rev; Group 3 approx. 21.5–88 cm³/rev (e.g. 226 approx. 26 cm³ class, 373 approx. 73 cm³ class)
• Continuous pressure: Group 2 up to 240 bar; Group 3 up to 220 bar (lower for larger displacements)
• Intermittent pressure: up to 260 bar
• Peak pressure: up to 310 bar
• Maximum speed: Group 2 up to 3500 rpm; Group 3 up to 3000 rpm
• Minimum speed: approx. 600–700 rpm
• Control: Fixed displacement
• Direction of rotation: Depending on configuration (S/D etc.)
• Drive shaft: Multiple standard ends available
• Mounting flange: Multiple standard flanges available
• Port connections: Threaded or flanged
• Housing material: High-strength aluminum
• Weight: Depends on configuration (Group 2 approx. 2–3 kg, Group 3 approx. 6–10 kg)

Key Technical Advantages

1. High-strength aluminum housing: Lightweight with good heat dissipation while maintaining structural rigidity – ideal for mobile equipment requiring reduced weight.
2. Precision gear machining and pressure-compensated gap sealing: Low internal leakage and reduced heat generation maintain high volumetric efficiency under medium- to high-pressure conditions.
3. Full interchangeability: Mounting dimensions, shaft ends, flanges and ports match original Bondioli exactly – true drop-in replacement without system modifications.
4. Low noise and modular design: Optimized tooth profile reduces pressure pulsation and noise; supports single and modular multiple-pump configurations for high flexibility.
5. 100% simulated-condition testing: Every unit is tested under actual working pressure, speed and load before shipment, ensuring consistent performance and reliability.

Application Areas

Construction machinery (auxiliary circuits on excavators and loaders), agricultural equipment, forklifts, port machinery, industrial hydraulic power units, mobile cranes and any medium- to high-pressure fixed-displacement hydraulic systems. Particularly suited for space-constrained, weight-sensitive applications with strict interchangeability requirements in both OEM and aftermarket use.

Expert Maintenance Tips

Install strictly according to original rotation direction and flange alignment to avoid additional radial or axial loads. Bleed the system thoroughly and verify suction-line sealing before first operation to prevent cavitation. Use mineral-based hydraulic oil meeting ISO/DIN standards (recommended operating viscosity 12–100 mm²/s) and maintain cleanliness class ISO 4406 19/17/14 or better. Monitor shaft-seal and housing temperatures regularly and stay within the allowed ambient temperature range. For long-term storage, seal all ports and fill with preservative oil. When replacing, always select the identical model or a fully tested interchangeable unit to maintain system matching and service life.