Rexroth High Pressure Gear Pump with 1800 rpm Speed and 350 MPA Load Capacity

The Rexroth PGH series comprises fixed displacement, gap-compensated internal gear pumps known for their robust construction and efficient performance. Key features include high operating pressures (up to 350 bar), a wide speed range (typically 200 to 3000 rpm), and compatibility with various hydraulic fluids like HLP, HEES, and HFDU. Their design ensures smooth operation, precise flow control, and through-drive capability for multi-pump configurations.

PGH pumps are widely used in industrial hydraulic systems, including ventilation and pressure compensation systems, mobile machinery, machine tools, and automation equipment. They are suitable for applications requiring reliable, continuous flow under moderate to high pressures.

PGH pumps are compatible with standard hydraulic fluids such as HLP, HEES (synthetic esters), and HFDU (phosphate esters). The optimal operating viscosity range is 10 to 300 mm²/s. Fluid temperature should generally be maintained between -10°C to +80°C for HLP fluids and -10°C to +50°C for special fluids.

Common failure causes include:

• Fluid Contamination: Dirt, debris, or air bubbles can cause internal wear, clogging, and failure.
• Overheating: Excessive heat can break down lubricants, damage seals, and cause bearing failure.
• Mechanical Wear and Tear: Misalignment, excessive pressure, or running outside specified parameters can accelerate wear.
• Cavitation: Occurs when the pump is starved of fluid, leading to noise and damage.

• Check that the reservoir fluid level is adequate
• Inspect the suction line and inlet filter for blockages
• Ensure the fluid viscosity is within the recommended range
• Check for air leaks in the suction line
• Verify that the pump's rotation direction is correct
• Inspect internal components for excessive wear

• Check for worn gears, pump housing, or side plates
• Verify relief valve setting and functionality
• Check filters and change fluid if contaminated
• Address cavitation by ensuring proper suction conditions

• Ensure fluid viscosity is correct
• Check system cooler functionality
• Verify pump is not overloaded
• Check for restrictions in discharge line
• Bleed the system if air is present
• Correct alignment between pump and drive motor if necessary

• Perform regular visual checks for leaks and unusual noises
• Use clean, recommended fluid and monitor its condition
• Regularly check and replace suction and pressure filters
• Ensure bearings are properly lubricated
• Inspect shaft seals and pipe connections for leaks
• Periodically verify alignment between pump and drive motor

Yes, most suppliers and manufacturers offer technical support. For genuine replacement parts (e.g., seals, gears, bearings) and specific troubleshooting guidance for your PGH model, it is recommended to contact the supplier or Bosch Rexroth directly.