Rexroth PGH Series ISO9001 Certified Hydraulic Gear Pump with 350 Bar Maximum Pressure and 112 L/min Flow Rate

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.

• 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.

• Internal Leakage: Check for worn gears, pump housing, or side plates.
• System Relief Valve: Verify its setting and functionality.