HGP-1A-F5R High Pressure Gear Pump HGP Series

Product Overview

The HGP-1A-F5R (and related models HGP-1A-F4R, HGP-1A-F8R, HGP-1A-F4L, HGP-2A-F8R, HGP-3A-F4R, HGP-3A-F17R) is a high-pressure external gear pump from the HGP series. Featuring a high-strength aluminum alloy body and precision gears, it offers a rated pressure of 21 MPa and maximum pressure up to 25 MPa. Compact, low-noise and efficient, with multiple flange and shaft options, the pump provides direct bolt-on interchangeability with OEM units and undergoes 100% simulated duty testing for reliable performance in construction, agricultural and industrial hydraulic systems.

Technical Specifications

• Models: HGP-1A-F5R (and HGP-1A-F4R / F8R / F4L, HGP-2A-F8R, HGP-3A-F4R / F17R, etc.)
• Pump type: High-pressure external gear pump
• Displacement (HGP-1A-F5R): 5 cc/rev
• Displacement range (HGP-1A series): 0.5–7.8 cc/rev
• Rated working pressure: 21 MPa (210 bar / approx. 210 kgf/cm²)
• Maximum pressure: 25 MPa (250 bar; some larger sizes 21 MPa)
• Rated speed: 1800 rpm
• Maximum speed: 3200–4500 rpm (decreases with larger displacement)
• Minimum speed: Approx. 600 rpm
• Weight (HGP-1A-F5R example): Approx. 1.2 kg
• Rotation: R = Clockwise (viewed from shaft end, standard); L = Counter-clockwise available
• Mounting: SAE 2-bolt flange, etc.
• Other: Aluminum alloy body; PT threaded ports (commonly 3/8″)

Key Technical Advantages

1. True drop-in interchangeability: Manufactured to OEM dimensional and porting standards for bolt-on replacement without modifications.
2. High-pressure lightweight design: Aluminum alloy housing delivers high pressure capability with low weight for compact installations.
3. High efficiency and low noise: Precision gear machining ensures smooth, quiet operation and high volumetric efficiency.
4. Wide speed and pressure range: Maximum speeds up to 4500 rpm and rated 21 MPa for diverse operating conditions.
5. 100% simulated duty testing: Full pressure, flow, noise and endurance verification before shipment ensures ready-to-install reliability.

Application Areas

• Construction machinery auxiliary hydraulic systems
• Agricultural machinery and loaders
• Industrial hydraulic power units
• Textile, mining and lifting/transport equipment
• Open-circuit systems requiring compact high-pressure gear pumps

Expert Maintenance Tips

• Confirm clockwise rotation (R) and flange/port compatibility before installation; use recommended hydraulic oil and maintain proper cleanliness.
• Start at low speed unloaded; check for leaks and noise. Avoid simultaneous maximum pressure and maximum speed.
• Regularly inspect seals and bearings; ensure unrestricted suction lines to prevent cavitation.
• Keep oil temperature and viscosity within recommended ranges; avoid over-pressure operation.
• For special shaft or flange codes, verify the complete order code and consult technical support.