Product Overview
The PLP10.5D0-81E1-LBB/BA-N-EL is a representative model of the Italian CASAPPA POLARIS (PL) series high-performance aluminum external gear pumps. This model belongs to the PLP10 series (Group 1), featuring a theoretical displacement of 5.34 cc/rev, continuous working pressure of 250 bar, and peak pressure up to 280–300 bar. Maximum speed reaches 4000 r/min.
Founded by Roberto Casappa over 60 years ago and still wholly owned by the Casappa family, CASAPPA has become a globally renowned hydraulic component manufacturer. The PLP10 series is an ultra-compact external gear pump within the POLARIS product line, offering displacements from 1.07 to 10.67 cc/rev. Featuring three-piece high-strength extruded aluminum construction with reinforced floating bushings and precision-ground gears, the series delivers high volumetric efficiency and low-noise operation while maintaining lightweight design.
The PLP10.5D0-81E1-LBB/BA-N-EL features a European standard Group 1 4-bolt flange (E1) and a European standard taper shaft 1:8 (81) configuration, with side-mounted square flange ports (LBB/BA) . The “D0” in the model code indicates clockwise rotation.
Engineered as a direct OEM-replacement solution for CASAPPA original products, this model fully complies with CASAPPA original design standards and European mounting interface specifications, offering 100% direct interchangeability. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.
Model Code Breakdown :
PLP — Series: CASAPPA POLARIS Aluminum Gear Pump
10 — Group: Group 10 (Group 1, displacement 1.07–10.67 cc/rev)
5 — Displacement code: 5.34 cc/rev
D0 — Rotation: D0 = Clockwise (right-hand), viewed from shaft end
81 — Shaft type: European standard taper shaft 1:8
E1 — Flange type: European standard Group 1 4-bolt flange, pilot diameter 25.4 mm
LBB/BA — Port position and type: Side ports, square flange connections
N — Seals: NBR (Perbunan)
EL — Factory options and configuration code
Technical Specifications
Model: PLP10.5D0-81E1-LBB/BA-N-EL
Brand: CASAPPA (Italy)
Series: POLARIS PLP10 Aluminum Gear Pump
Group: Group 10 (Group 1)
Theoretical Displacement: 5.34 cc/rev
Continuous Working Pressure: 250 bar
Peak Pressure: 280–300 bar
Speed Range: 650 – 4000 r/min
Maximum Speed: 4000 r/min
Minimum Speed: 650 r/min
Rotation Direction: Clockwise (right-hand, viewed from shaft end)
Mounting Flange: European standard Group 1 4-bolt flange, pilot diameter 25.4 mm
Shaft Type: European standard taper shaft 1:8
Port Position: Side-mounted
Port Connection: Square flange connections
Seals: NBR (Perbunan)
Net Weight: Approx. 1.8 kg
Housing Material: High-strength extruded aluminum
Recommended Media: Hydraulic oil (HLP mineral oil)
Circuit Type: Open circuit
Key Technical Advantages
1. High-Strength Extruded Aluminum Housing – Lightweight & High Strength
The PLP10 series pump body is manufactured using high-strength extruded aluminum, delivering significant weight reduction (net weight only approx. 1.8 kg). The three-piece modular construction ensures compact dimensions and flexible installation, making it particularly suitable for mobile hydraulic equipment with strict weight requirements.
2. High-Pressure Durability – 250 bar Continuous / 300 bar Peak
The PLP10 series delivers continuous operating pressure up to 250 bar with peak pressures of 280–300 bar. The combination of high-strength aluminum housing and precision-ground gears ensures long-term stability under high-pressure conditions.
3. High Efficiency & Low-Noise Operation
Optimized gear design and precision assembly ensure high volumetric efficiency and low-noise operation. Reinforced floating bushings effectively reduce internal leakage and energy losses.
4. Flexible Configuration Options & Modular Design
The PLP10 series offers multiple displacement options (1.07 – 10.67 cc/rev). Clockwise/counter-clockwise rotation, side/rear port positions, and various shaft and flange options are available. Single and multi-pump configurations are supported.
5. Standard European Interfaces – 100% Direct Interchangeability
Features European standard Group 1 4-bolt flange (E1) and European standard taper shaft 1:8 (81) . Fully compliant with CASAPPA original design standards—direct drop-in replacement with zero modifications required.
6. 100% Factory Tested
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation—ensuring every unit meets design performance standards.
Application Areas
The PLP10.5D0-81E1-LBB/BA-N-EL gear pump is widely used in the following equipment and systems:
Small Hydraulic Power Units (HPU): Core power elements for small hydraulic stations
Lubrication Systems: Circulation lubrication systems for industrial equipment
Construction Machinery: Small excavators, loaders, and other mobile machinery
Agricultural Machinery: Tractors, sprayers, and agricultural equipment
Material Handling Equipment: Forklifts, lift platforms
Industrial Hydraulic Systems: Machine tools, automation equipment
Special Vehicles: Aerial work platforms, municipal vehicles
Expert Maintenance Tips
1. Model Confirmation
The PLP10.5D0-81E1-LBB/BA-N-EL offers 5.34 cc/rev displacement within the PLP10 series (Group 1). The PLP10 series offers displacements from 1.07 to 10.67 cc/rev. Before installation, confirm the correct displacement based on system flow requirements and verify the complete model code on the pump nameplate.
2. Rotation Direction Confirmation
The “D0” in the model code indicates clockwise rotation (right-hand, viewed from shaft end). Before installation, jog the motor to check rotation direction and verify that the PTO rotation matches the pump’s rotation direction—stop immediately if the direction is incorrect, as continued operation will cause pump failure to prime and may lead to severe damage to gears and bearings within a short period.
3. Installation Precautions
Thoroughly clean the European standard Group 1 4-bolt flange (pilot diameter 25.4 mm) and taper shaft 1:8 mating surfaces
Use CASAPPA-specified torque values for mounting bolts—avoid over-tightening which may cause distortion of the aluminum housing
The suction line should be short and straight to avoid restrictions and bends, preventing cavitation
Port connections are side-mounted square flange types—ensure proper sealing
4. First Start-Up and Bleeding
Before first start-up, must fill the pump with hydraulic oil through the inlet port—never start dry
After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system
Check for abnormal noise or leakage—aluminum housing pumps are particularly sensitive to cavitation
5. Fluid and Filtration
Use high-quality anti-wear hydraulic oil compliant with DIN 51524 standards (HLP mineral oil)
Recommended viscosity: 12–100 cSt (higher viscosity acceptable for cold starts)
Maintain operating temperature within recommended range
Maintain system oil cleanliness to ISO 4406 18/15 or better
Install suitable filters on both suction and return lines
6. Periodic Maintenance
Check mounting bolt torque every 1,000 operating hours
Regularly monitor system operating pressure—not to exceed 250 bar continuous (280–300 bar peak)
Regularly inspect shaft seals to prevent leakage
If flow output decreases, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly
