PLM20.25R0-82E2-LEA/EB-N-EL-C Casappa Gear Pump 26.42cc

Product Overview

The PLM20.25R0-82E2-LEA/EB-N-EL-C is an external gear pump from the Italian Casappa POLARIS 20 series, with a displacement of 26.42 cm³/rev.

The POLARIS series represents over fifty years of Casappa experience in the design and production of hydraulic components. Engineered with an aluminum alloy housing and sleeve-bearing-supported gears, with front and rear covers available in aluminum or cast iron with excellent mechanical characteristics, the pump delivers reliable performance, high efficiency, and durability. Every unit is manufactured to original equipment specifications, ensuring 100% drop-in interchangeability with genuine Casappa PLM20 series pumps without any system modifications. Each pump undergoes rigorous 100% simulated duty-cycle testing to validate pressure-flow-efficiency performance curves.

Brand Disclaimer: This product is a high-quality compatible replacement engineered for full interchangeability with Casappa original equipment. All Casappa brand names and model codes are referenced solely to indicate compatibility and interchangeability. This product is manufactured by an independent producer and is not an original Casappa product.

Technical Specifications 

• Model Code: PLM20.25R0-82E2-LEA/EB-N-EL-C

• Brand Series: Casappa POLARIS 20 (Group 20)

• Product Type: External Gear Pump

• Displacement: 26.42 cm³/rev

• Continuous Pressure (P1) : 170 bar

• Maximum Pressure (P2) : 280 bar

• Peak Pressure: 300 bar (typical for POLARIS 20 series)

• Maximum Speed: 2,500 rpm

• Minimum Speed: 500 rpm

• Rotation Direction: Reversible (both directions) 

• Shaft Type: European standard 1:8 tapered shaft (code 82) 

• Mounting Flange: European standard E2 flange, pilot diameter 36.5 mm

• Pressure Side Flange: G 1/8″

• Suction Side Flange: G 1/4″

• Pressure Side Core-to-Core Distance: 30 mm

• Suction Side Core-to-Core Distance: 40 mm

• Housing Length: 125.5 mm

• Flange to Center Bore Length: 60 mm

• Housing Material: Aluminum alloy

• Seals: NBR (Nitrile rubber)

• Hydraulic Fluid: Mineral-based hydraulic oil

• Operating Temperature Range: -25°C to +80°C

• Weight: Approx. 4.34 kg

Key Technical Advantages

1. Lightweight Aluminum Alloy Construction

The high-strength aluminum alloy housing delivers a total weight of only approx. 4.34 kg—significantly lighter than cast iron equivalents. This substantial weight reduction makes it ideal for weight-sensitive mobile equipment and vehicle-mounted systems.

2. Reversible Rotation for Maximum Installation Flexibility

This model features reversible rotation capability—the pump can be installed with either clockwise or counterclockwise drive rotation. This significantly simplifies inventory management and field adaptation, particularly suitable for applications requiring frequent rotation direction changes.

3. Sleeve Bearing-Supported Gears for Extended Durability

The gear pairs are supported by sleeve bearings, effectively reducing friction losses between gear shafts and housing while significantly enhancing bearing load capacity and service life—particularly suited for demanding long-term continuous operation.

4. European Standard Interface – 100% Drop-In Interchangeability

Featuring European standard 1:8 tapered shaft (code 82) and E2 flange (pilot diameter 36.5 mm). Fully compliant with international interchange standards—delivers 100% drop-in interchangeability with genuine Casappa PLM20 series pumps.

5. Broad Speed & Temperature Operating Range

Supports a speed range of 500 to 2,500 rpm with operating temperatures from -25°C to +80°C. Maintains stable flow characteristics from low-speed precision control to high-speed continuous duty.

6. 100% Simulated Duty-Cycle Testing

Every pump is 100% tested on dedicated hydraulic test benches under simulated real-world operating conditions—validating pressure-flow characteristics and efficiency curves at continuous pressure (170 bar), maximum pressure (280 bar), peak pressure (300 bar), and full speed range—ensuring zero-defect, plug-and-play performance upon installation.

Application Areas

• Agricultural Machinery: Tractor hydraulic systems, combine harvester implement drives

• Construction Equipment: Mini-excavators, loader auxiliary hydraulic systems

• Material Handling Equipment: Forklifts, lift platform hydraulic systems

• Mobile Equipment: Aerial work platforms, street sweeper hydraulics

• Industrial Equipment: Injection molding machine power units, machine tool hydraulics

Expert Maintenance Tips

1. Fluid Cleanliness Control

Maintain system fluid cleanliness to ISO 4406 19/17/14 or better. Install a 10–25 μm absolute filtration filter upstream of the inlet port to prevent particle contamination from damaging precision gear pairs and sleeve bearings.

2. Inlet Line Requirements

Keep suction lines short and straight with adequate diameter—not less than the port size (suction side G 1/4″). Recommended suction line flow velocity: ≤1.5 m/s to prevent cavitation from excessive inlet resistance. Inlet pressure must be maintained between 0.8–2.0 bar (absolute) .

3. Coupling Alignment Precision

Ensure pump shaft-to-drive shaft coaxiality deviation ≤0.05 mm and angular deviation ≤0.5° during installation. Flexible couplings are strongly recommended. If the drive involves sprockets or V-belt pulleys, an independent outboard bearing MUST be installed to protect the pump shaft.

4. First-Start Priming Procedure

Before initial startup, prime the pump by bleeding air through the drain port or a loosened outlet fitting. Perform 2–3 jog starts with the outlet open (no load) until oil fills the pump cavity without air bubbles, then connect the load circuit for full operation.

5. Viscosity & Temperature Monitoring

Recommended operating viscosity: 12–100 cSt. During cold starts when viscosity exceeds the recommended range, ensure adequate suction conditions or preheat the fluid to prevent cavitation damage. Operating temperature range: -25°C to +80°C.

6. Rotation Direction Confirmation

This model features reversible rotation capability. Always verify that the actual drive motor/engine rotation matches the system design requirements before installation.