Product Overview
The PGP500 series is a highly representative high-pressure aluminum external gear pump product line from Parker Hannifin. This series comprises four frame sizes—PGP502, PGP505, PGP511, and PGP517—with displacements ranging from 0.8 to 70 cm³/rev. The PGP511 series covers displacements from 6 to 33 cm³/rev, with maximum operating pressure of 250 bar (3,625 psi) and speeds up to 4,000 rpm. The specific model PGP511A0110CS1D4NJ7J5B1B1 features a displacement of 11 cm³/rev.
As a professional hydraulic component manufacturer, we provide 100% interchangeable replacement solutions for the Parker PGP511 series. Every PGP511 series gear pump undergoes 100% performance testing under simulated actual operating conditions—from displacement accuracy and pressure stability to volumetric efficiency—fully benchmarked against Parker original equipment standards.
Model Code PGP511A0110CS1D4NJ7J5B1B1 Breakdown (based on Parker standard naming conventions):
PGP: Product series—Fixed displacement external gear pump
511: Frame size (PGP511 series, aluminum housing, 12-tooth gear design)
A: Design version or series variant
0110: Displacement code—corresponds to 11 cm³/rev
C: Mounting flange type
S: Shaft type
1D4: Port configuration and specification code
NJ7J5: Seal and special options code
B1B1: Customer-specific/special configuration code
Technical Specifications
PGP511A0110CS1D4NJ7J5B1B1
Brand: Parker Hannifin
Series: PGP511 Aluminum High-Pressure Gear Pump
Theoretical Displacement: 11 cm³/rev
Rated Operating Pressure: 250 bar (25 MPa / 3,625 psi)
Maximum Continuous Operating Pressure: 250 bar
Maximum Speed: 3,500 rpm（PGP511 series up to 4,000 rpm）
Minimum Speed: 500 rpm
Control Type: External gear pump, fixed displacement
Rotation Direction: Clockwise (CW) / Counterclockwise (CCW) optional
Mounting Type: 2-Bolt SAE A flange, Rectangular, Thru-bolt flange, 4-Bolt flange
Port Type: BSP, Square flange, Diamond flange
Shaft Type: SAE A Splined, Taper Key, DIN ISO 14
Housing Material: High-strength aluminum alloy
Seal Material: Standard hydraulic fluid seals / Fire-resistant fluid seals (configuration dependent)
Fluid Compatibility: Standard hydraulic fluids, fire-resistant fluids, water-glycol, biodegradable fluids
Maximum Fluid Temperature: 80°C
Minimum Fluid Temperature: -15°C
Recommended Filtration: ISO 4406 19/17/13
Noise Level: 12-tooth gear profile with optimized flow metering for low noise
Weight: Approx. 4.5 kg
PGP500 Series Full Frame Sizes (Reference)
PGP502: Displacement 0.8–6 cm³/rev, 9-tooth gear profile
PGP505: Displacement 3–15 cm³/rev, 13-tooth gear profile
PGP511: Displacement 6–33 cm³/rev, 12-tooth gear profile
PGP517: Displacement 20–70 cm³/rev, 13-tooth gear profile
Important Note: The above specifications are compiled from Parker Hannifin official technical documentation and publicly available industry data. Different suffix codes represent different mounting flanges, shaft configurations, port options, and seal specifications. Please refer to the product nameplate or technical agreement for exact specifications.
Key Technical Advantages
1. 12-Tooth Optimized Gear Design — Ultra-Low Noise Operation
The PGP511 series features a 12-tooth gear profile with optimized flow metering, effectively reducing pressure pulsation compared to conventional gear pumps. Measured operating noise is exceptionally low, ensuring smooth and quiet operation—ideal for noise-sensitive environments.
2. Aluminum Housing — High Power Density with Lightweight Construction
The PGP511 series pump body is manufactured from high-strength aluminum alloy, delivering an optimal balance of high performance and high power density. With total weight of only approximately 4.5 kg, it is significantly lighter than traditional cast iron pump bodies—particularly suitable for weight-sensitive applications such as aerial work platforms and mobile machinery.
3. Pressure Balanced Thrust Blocks — High Efficiency Across All Operating Conditions
The PGP511 series features pressure balanced thrust blocks, automatically compensating for clearance changes caused by wear and pressure variations to maintain maximum efficiency under all operating conditions. Minimal power loss and low fluid temperature rise effectively reduce system energy consumption.
4. High-Strength Materials + Large Journal Bearings — Extended Service Life
High-strength materials combined with large journal bearings provide low bearing loads for extended service life. The three-piece construction facilitates convenient maintenance.
5. Rich Configuration Options and Multiple Pump Combinations
The PGP511 series offers extensive configuration options—clockwise/counterclockwise rotation, SAE/ISO/DIN mounting flanges and shaft styles, and BSP/SAE/NPT port types. Supports single, tandem, and multiple pump configurations, providing different pressure/flow combinations driven by a single shaft to save installation space.
Application Areas
Aerial Work Platforms: Scissor lifts, telescopic boom lifts hydraulic systems
Construction Machinery: Hydraulic systems for excavators, loaders, and related equipment
Agricultural Machinery: Hydraulic systems for tractors, harvesters, and agricultural equipment
Forestry Equipment: Brush chippers, trenchers, etc.
Material Handling Equipment: Forklifts, stackers, etc.
Power Steering Systems: Priority valve integration available
Industrial Hydraulic Power Units: Various industrial hydraulic stations
Lube & Transfer Pumps: Lubrication pumps, transfer pumps, etc.
Expert Maintenance Tips
1. Verify Rotation Direction
PGP511 series pumps must only be operated in the specified rotation direction. Always verify that the rotation direction marked on the nameplate matches the drive motor’s rotation before installation. Reverse operation is strictly prohibited—this will prevent proper suction and damage the shaft seal.
2. First Start-up and Priming
Ensure the pump cavity is fully primed with hydraulic fluid before first start-up. Purge air from the highest point of the pump body to ensure no air remains in the cavity. Never start the pump dry—this will cause severe wear or seizure of gears and bearings.
3. Inlet Pressure Control
Inlet pressure should be maintained within 0.8–2 bar absolute, with minimum inlet pressure not below 0.5 bar absolute (short-term no-load conditions). Insufficient suction pressure will cause cavitation, damaging internal pump components. Ensure suction lines are unobstructed and fluid viscosity is appropriate.
4. Fluid Cleanliness Management
Gear pumps are sensitive to fluid cleanliness. Maintain fluid cleanliness to ISO 4406 19/17/13 or better. Install appropriately rated filters on the pump suction line and regularly inspect filter element condition. Compatible fluids include standard hydraulic fluids, fire-resistant fluids, water-glycol, and biodegradable fluids.
5. Speed and Pressure Limits
Rated Pressure: 250 bar (25 MPa / 3,625 psi)
Maximum Speed: 3,500 rpm (PGP511 series up to 4,000 rpm)
Minimum Speed: 500 rpm
Never exceed rated speed or pressure limits—peak pressure is permitted for short-term transient conditions only
6. Temperature Monitoring
Maximum Fluid Temperature: 80°C
Minimum Fluid Temperature: -15°C
Special seal materials required outside this temperature range
7. Bearing Load Control
PGP511 series pumps are not designed to withstand external axial or radial loads. If the application involves shaft/radial loads, an external bearing must be provided for support.
8. Regular Inspection and Maintenance
Inspect the system filter element condition every 500 operating hours. Regularly monitor the pump for abnormal operating noise—if abnormal noise, excessive housing temperature rise, or system pressure drop is detected, shut down immediately for inspection. The PGP511 series features three-piece construction for convenient maintenance with few wear parts.
