PLP20.4-82E2-LGD/GD/20.4-LGD/GD-D0-N-EL Casappa Gear Pump 250bar

Product Overview

The PLP20.4-82E2-LGD/GD/20.4-LGD/GD-D0-N-EL is a tandem external gear pump from the Casappa POLARIS 20 series (Group 2). This configuration features two PLP20.4 pump sections connected in series, each with a displacement of 4.27 cm³/rev (alternatively cited as 4.95 cm³/rev due to differing measurement standards).

The POLARIS series represents over fifty years of Casappa experience in hydraulic component design and manufacturing. Engineered with a high-strength aluminum alloy housing, the pump houses two gear wheels supported by sleeve bearings. This product belongs to the Group 2 platform with EUROPEAN standard (E2 flange + 82 tapered shaft) interfaces. As a tandem configuration, this pump delivers two independent oil flows from a single drive input, significantly simplifying hydraulic system architecture.

Every unit is manufactured to original equipment specifications, ensuring 100% drop-in interchangeability with genuine Casappa PLP20.4 series tandem pumps without any system modifications. Each pump undergoes rigorous 100% simulated duty-cycle testing on dedicated test benches 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: PLP20.4-82E2-LGD/GD/20.4-LGD/GD-D0-N-EL

• Brand Series: Casappa POLARIS 20 (Group 2)

• Product Type: Tandem External Gear Pump

• Primary Section Displacement: 4.27 cm³/rev (≈ 4.95 cm³/rev)

• Secondary Section Displacement: 4.27 cm³/rev (≈ 4.95 cm³/rev)

• Total Displacement (Both Sections): 8.54 cm³/rev (≈ 9.90 cm³/rev)

• Continuous Operating Pressure: 250 bar

• Intermittent Operating Pressure: 280 bar

• Peak Pressure: 300 bar

• Maximum Speed: 4,000 rpm

• Minimum Speed: 600 rpm

• Rotation Direction: Clockwise (CW / D0 code)

• Mounting Flange Type: European standard flange (E2 / EUROPEAN)

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

• Port Location: Side ports

• Inlet Port Type: GD threaded ports

• Outlet Port Type: GD threaded ports

• Housing Material: Aluminum alloy

• Flange & Cover Material: Aluminum alloy

• Seals: NBR (Nitrile rubber)

• Hydraulic Fluid: Mineral oil HLP

• Recommended Viscosity: 12 – 100 cSt

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

• Maximum Recommended Contamination Level: ISO 4406 19/17/14

• Weight: Approx. 4.5 – 5.5 kg (tandem configuration)

Key Technical Advantages

1. Integrated Tandem Design for Simplified System Architecture

This product combines two PLP20.4 pump sections into a single compact tandem unit, delivering two independent oil flows from a single drive input. This significantly simplifies hydraulic piping, saves installation space and cost—ideal for space-sensitive medium and small hydraulic equipment.

2. Lightweight Aluminum Alloy Construction

The high-strength aluminum alloy housing, flange, and rear cover deliver excellent pressure containment at 250 bar continuous rating while significantly reducing overall weight. Compared to cast iron equivalents, the weight reduction is substantial—making it ideal for weight-sensitive mobile hydraulic applications.

3. European Standard Interface & Drop-In Interchangeability

Featuring the European standard 1:8 tapered shaft (code 82) and European standard flange (E2), fully compliant with SAE/DIN international interchange standards. Delivers 100% drop-in interchangeability with genuine Casappa PLP20.4 series tandem pumps—install directly with zero system modifications.

4. 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.

5. Broad Speed & High-Pressure Operating Range

Supports a wide speed range of 600 to 4,000 rpm, with continuous pressure rating of 250 bar, intermittent pressure of 280 bar, and peak pressure up to 300 bar. Maintains stable flow characteristics whether operating at low-speed precision control or 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 rated pressure (250 bar), peak pressure (300 bar), and full speed range—ensuring zero-defect, plug-and-play performance upon installation.

Application Areas

• Agricultural Machinery: Tractor dual-circuit hydraulic systems, combine harvester implement and steering synchronized drives

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

• Industrial Equipment: Injection molding machine hydraulic power units, metal forming dual-circuit supply systems

• Mobile Equipment: Aerial work platforms, forklift hydraulic systems

• Tandem Pump Applications: Systems requiring simultaneous independent hydraulic flow to two separate actuators or circuits (e.g., steering + implement, lift + tilt)

Expert Maintenance Tips

1. Inlet Line Requirements

Keep suction lines short and straight with adequate diameter—not less than the port size. Both inlet ports of the tandem pump must be supplied with sufficient flow independently to prevent cavitation from excessive inlet resistance. Recommended suction line flow velocity: ≤1.5 m/s.

2. Fluid Cleanliness Control

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

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, bleed air through both outlet ports or drain ports separately. Perform 2–3 jog starts with outlets open (no load) until oil fills both pump sections without air bubbles, then connect load circuits for full operation.

5. Rotation Direction Confirmation

The D0 code in this model indicates clockwise (CW) rotation. Always verify that the drive motor/engine rotation matches the pump before installation. Specify counterclockwise (CCW) configuration when ordering if required.

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