Product Overview
The PGP 500 Series is Parker Hannifin‘s high-performance aluminum-bodied fixed displacement external gear pump, available in four frame sizes (PGP 502, PGP 505, PGP 511, PGP 517) with displacements ranging from 0.8 to 70 cm³/rev. The series features high-strength aluminum construction with large-diameter journal bearings, delivering high power density, excellent efficiency, and low noise operation. It is widely applied in material handling, agricultural machinery, construction equipment, and industrial applications.
This page features three PGP 500 Series models:
PGP505A0080CA1H2NE5E3B1B1: PGP505 frame, 8.0 cm³/rev displacement, 275 bar continuous pressure, clockwise rotation
PGP505A0080CQ2D2NE5E3B1B1: PGP505 frame, 8.0 cm³/rev displacement, 275 bar continuous pressure, alternative port/shaft configuration
PGP511A0230CA1H2ND5D4B1B1: PGP511 frame, 23.0 cm³/rev displacement, 250 bar operating pressure, 12-tooth low-noise design
Both PGP505 and PGP511 feature Pressure Balanced Thrust Blocks to ensure maximum efficiency under all operating conditions. PGP505 and PGP517 utilize a 13-tooth gear profile, while PGP511 features a 12-tooth gear profile with optimized flow metering, effectively reducing pressure pulsation for exceptionally quiet operation.
As original specification models within the Parker PGP 500 line, these products enable direct form-fit-function interchangeability with original Parker units—no modifications to piping or mounting interfaces required. Our replacement solutions strictly adhere to Parker technical standards and undergo 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products. They are the ideal choice for hydraulic system maintenance and upgrades in industrial equipment and mobile machinery.
Technical Specifications
Model 1: PGP505A0080CA1H2NE5E3B1B1
Applicable Model:
Model Code Breakdown (per Parker naming convention):
Product Series: PGP — External Gear Pump
Series: 505 — PGP505 Frame Size
Body Type: A — Standard Body
Displacement Code: 0080 — 8.0 cm³/rev
Rotation: C — Clockwise
Shaft: A — Specific shaft configuration
Mounting Flange: H2 — Specific flange configuration
Seals: N — NBR
Ports: E5/E3 — Specific port configuration
This Model Detailed Specifications:
Geometric Displacement: 8.0 cm³/rev
Continuous Operating Pressure: 207 bar (3,000 psi)
Intermittent Operating Pressure: 248 bar (3,600 psi)
Maximum Operating Pressure: 275 bar (3,988 psi)
Maximum Speed: 4,000 rpm
Minimum Speed: 500 rpm
Rotation Direction: Clockwise (viewed from shaft end)
Body Material: High-Strength Aluminum Alloy
Bearing Type: Journal Bearings
Seal Material: NBR
Fluid Compatibility: Standard Hydraulic Fluid, Phosphate Ester, Water-Glycol
Operating Temperature Range: -15°C to +80°C
Viscosity Range: 50 – 7500 SUS
Weight: Approx. 2.2 – 2.8 kg (PGP505 Series)
Model 2: PGP505A0080CQ2D2NE5E3B1B1
Applicable Model:
Model Code Breakdown (per Parker naming convention):
Product Series: PGP — External Gear Pump
Series: 505 — PGP505 Frame Size
Body Type: A — Standard Body
Displacement Code: 0080 — 8.0 cm³/rev
Rotation: C — Clockwise
Shaft/Seal: Q2 — Specific shaft and seal configuration
Port Configuration: D2/NE5/E3 — Specific port configuration
This Model Detailed Specifications:
Geometric Displacement: 8.0 cm³/rev
Continuous Operating Pressure: 207 bar (3,000 psi)
Maximum Operating Pressure: 275 bar (3,988 psi)
Maximum Speed: 4,000 rpm
Minimum Speed: 500 rpm
Rotation Direction: Clockwise (viewed from shaft end)
Body Material: High-Strength Aluminum Alloy
Bearing Type: Journal Bearings
Fluid Compatibility: Standard Hydraulic Fluid, Phosphate Ester, Water-Glycol
Operating Temperature Range: -15°C to +80°C
Viscosity Range: 50 – 7500 SUS
Weight: Approx. 2.2 – 2.8 kg (PGP505 Series)
Model 3: PGP511A0230CA1H2ND5D4B1B1
Applicable Model:
Model Code Breakdown (per Parker naming convention):
Product Series: PGP — External Gear Pump
Series: 511 — PGP511 Frame Size
Body Type: A — Standard Body
Displacement Code: 0230 — 23.0 cm³/rev
Rotation: C — Clockwise
Shaft: A — Specific shaft configuration
Mounting Flange: H2 — Specific flange configuration
Seals: N — NBR
Ports: D5/D4 — Specific port configuration
This Model Detailed Specifications:
Geometric Displacement: 23.0 cm³/rev
Operating Pressure: 250 bar (3,625 psi)
Maximum Speed: 4,000 rpm
Rotation Direction: Clockwise (viewed from shaft end)
Body Material: High-Strength Aluminum Alloy
Gear Teeth: 12-tooth, low-noise design
Fluid Compatibility: Standard Hydraulic Fluid
Operating Temperature Range: -20°C to +100°C
Weight: Approx. 3.0 – 3.5 kg (PGP511 Series, estimated)
Key Technical Advantages
1. High-Strength Aluminum Body — Lightweight with High Power Density
The PGP 500 Series features high-strength aluminum construction with bushing block design, delivering an optimal balance of high pressure capacity and minimum weight. The PGP505 Series weighs only 2.2 – 2.8 kg, simplifying installation and reducing overall equipment load—particularly advantageous for weight-sensitive mobile applications.
2. Pressure Balanced Thrust Blocks — High Volumetric Efficiency
The PGP 500 Series employs Pressure Balanced Thrust Blocks to ensure maximum efficiency under all operating conditions. This design automatically compensates for gear end-face clearances, significantly reducing internal leakage and enhancing overall system energy efficiency.
3. Optimized Gear Profiles with Flow Metering — Ultra-Low Noise Operation
PGP505 and PGP517 feature a 13-tooth gear profile, while PGP511 features a 12-tooth gear profile with optimized flow metering. The optimized gear designs effectively reduce pressure pulsation for exceptionally quiet and smooth operation. The PGP511 Series is particularly suitable for noise-sensitive applications.
4. Large-Diameter Journal Bearings — Long Service Life and High Reliability
High-strength materials and large shaft diameters effectively reduce bearing loads, ensuring long-term reliable operation under high-pressure conditions. Journal bearings provide excellent load-carrying capacity and wear resistance, extending product service life.
5. Modular Design with Flexible Configuration Options
The PGP 500 Series supports single, tandem, and multiple pump configurations, with SAE, ISO, and DIN mounting options available. A comprehensive range of valve options—including pressure relief, anti-cavitation, cross-port relief, solenoid unloading, and proportional relief valves—accommodates diverse system requirements. Clockwise, counterclockwise, and bi-rotational options further enhance application flexibility.
Application Areas
Material Handling Equipment: Forklift hydraulic systems, aerial work platforms
Agricultural Machinery: Tractor hydraulic systems, turf care equipment
Construction Equipment: Building equipment hydraulic systems
Forestry Equipment: Brush chippers, trenchers
Specialty Vehicles: Municipal street sweepers, trucks and buses
Industrial Hydraulic Systems: Hydraulic power units (HPU), lube pumps, transfer pumps
Steering Systems: Power steering pumps (priority valve options available)
Expert Maintenance Tips
1. Installation Precautions
The PGP 500 Series offers uni-directional and bi-rotational options—verify that the system‘s required rotation direction matches the pump’s identification marking before installation. All three featured models feature clockwise rotation.
Ensure coaxial alignment between the pump and drive shaft. Direct drive with flexible coupling is recommended to avoid radial loads on the pump shaft. Units subject to axial or radial loads must be specified with an outboard bearing.
Inlet absolute pressure should be maintained between 0.8 and 2 bar abs. The suction line diameter must not be smaller than the pump inlet port to prevent cavitation.
2. Fluid Management
Use mineral hydraulic oils conforming to ISO/DIN standards.
System fluid cleanliness must meet Parker-recommended standards, with ISO 4406 19/17/13 or higher recommended.
Operating temperature should be maintained within -15°C to +80°C.
Viscosity should be maintained within 50 – 7500 SUS.
Prime the pump by filling the housing with hydraulic fluid through the suction port before initial start-up. Never run the pump dry.
3. Start-Up & Commissioning
Use jog start method for initial start-up; verify correct rotation direction before continuous operation.
Allow the pump to run under no-load (low pressure) conditions for 2-3 minutes to purge air and ensure proper lubrication.
Gradually increase to operating pressure while monitoring noise, temperature, and system pressure for normal operation.
4. Routine Maintenance
The PGP 500 gear pump itself is maintenance-free; however, regular maintenance of the entire hydraulic system is essential for trouble-free pump operation.
Inspect system fluid cleanliness and condition every 1,000-2,000 operating hours.
Regularly replace return line filters and suction strainers to prevent contaminant ingress into the pump body.
