Parker PGP511 P330 P350 Series Gear Pump | PGP511A0160 High Pressure Hydraulic Pump

The PGP and P Series (formerly Commercial Intertech) high-pressure gear pumps from Chengyuan Hydraulic are premium power components engineered for heavy-duty mobile and industrial applications. Fully compatible with Parker standards, the PGP511A0160 features a high-strength extruded aluminum body and a pressure-balanced design, maintaining superior volumetric efficiency under continuous 250 bar pressure. Every unit undergoes 100% simulated full-load testing to ensure performance parity with the original equipment, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series: PGP511 Series (Parker PGP500 compatible)

• Model Code: PGP511A0160CS1D4NJ9J8B1B1

• Displacement: 16.0 $cm^3/rev$ (16cc)

• Continuous Pressure: 250 bar (25 MPa)

• Peak Pressure: 280 bar (28 MPa)

• Maximum Speed: 3500 rpm

• Mounting Flange: SAE A 2-Bolt Standard

• Drive Shaft: Standard Keyed or SAE Spline (Per suffix)

• Porting: D4 Side Ports (Inlet/Outlet)

• Sealing: NBR standard (FKM/Viton available for high-temp)

Key Technical Advantages:

• Bimetal Pressure-Balanced Plates: Floating plates automatically adjust axial clearances based on system pressure. This minimizes internal leakage and sustains over 95% volumetric efficiency even at high temperatures.

• Superior Material Integrity: PGP511 utilizes high-tensile extruded aluminum, while the P315/330/350/365 models use heavy-duty cast iron, offering exceptional fatigue resistance and shock-load durability.

• Advanced Bushing Technology: Equipped with heavy-duty high-load bushings rather than standard rollers, providing better vibration damping and superior contamination tolerance for extended service life.

• Low Pulsation Gear Geometry: Precision-ground and profile-modified gears reduce fluid pulsation and mechanical noise, ensuring smooth hydraulic power delivery.

Application Areas:

• Construction Machinery: Loaders, mini-excavators, and skid steers.

• Agricultural Equipment: Tractor hitch systems and harvester control circuits.

• Material Handling: Primary lift pumps for forklifts and aerial work platforms.

• Municipal Vehicles: Refuse compactors and street sweepers.

Expert Maintenance Tips:

• Alignment Precision: Ensure the alignment between the prime mover and pump shaft is within 0.1mm to prevent uneven bearing wear and premature shaft seal failure.

• System Filtration: To protect the precision plates, maintain system oil cleanliness at NAS Class 9 (ISO 18/16/13) or better.

• Priming & Bleeding: Before the first run, fill the pump housing with clean hydraulic oil and perform brief “jog” starts without load to bleed air and prevent dry-running damage to the gear faces.