PLP20.16-5435-L**/BC/20.14-LBM/BC-S7 Casappa Pump 250bar

Product Overview

The PLP20.16-5435-L/BC/20.14-LBM/BC-S7 is a tandem external gear pump from the Italian Casappa POLARIS 20 series. This configuration features two pump sections connected in series—a primary section with 16.85 cm³/rev displacement and a secondary section with 14.53 cm³/rev displacement. It belongs to the Group 20 platform.

The POLARIS series represents over fifty years of Casappa experience in design and production of hydraulic components. Engineered with an aluminum alloy housing and gear wheels supported by sleeve bearings, with front and rear covers in aluminum alloy, the pump delivers compact structure, high efficiency, and is suitable for both mobile and stationary hydraulic applications. 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 series tandem 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: PLP20.16-5435-L**/BC/20.14-LBM/BC-S7

• Brand Series: Casappa POLARIS 20 (Group 20)

• Product Type: Tandem External Gear Pump

• Primary Section Displacement: 16.85 cm³/rev

• Secondary Section Displacement: 14.53 cm³/rev

• Total Displacement (Both Sections): 31.38 cm³/rev

• Continuous Operating Pressure: 250 bar

• Intermittent Operating Pressure: 280 bar

• Peak Pressure: 300 bar

• Maximum Speed: 3,000 – 3,500 rpm

• Minimum Speed: 500 rpm

• Rotation Direction: Left-hand (Counterclockwise / CCW / -L suffix)

• Mounting Flange: German standard GER80-4, 4-bolt flange, pilot diameter 80.0 mm

• Mounting Bolt Spacing: 72 × 100 mm

• Drive Shaft Type: German standard Tapered shaft 1:5

• Shaft Keyway: 3.0 mm

• Port Location: Side ports

• Inlet Port Type: GE40 (German standard flange)

• Outlet Port Type: GE35 (German standard flange)

• Housing Material: Aluminum alloy

• Flange & Cover Material: Aluminum alloy

• Seals: NBR (Nitrile rubber)

• Hydraulic Fluid: Mineral-based hydraulic oil

• Recommended Viscosity: 12 – 100 cSt

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

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

• Maximum Input Torque: 4 daNm

• Weight: Approx. 5.30 kg

Key Technical Advantages

1. Integrated Tandem Design for Simplified System Architecture

This product combines a primary section (16.85 cc) and secondary section (14.53 cc) 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 complex systems requiring simultaneous independent hydraulic flow to multiple actuators.

2. Aluminum Housing with Sleeve Bearings – Lightweight & Durable

The high-strength aluminum alloy housing with sleeve bearing-supported gears delivers a total weight of only approx. 5.30 kg. Sleeve bearings effectively reduce friction losses between gear shafts and housing while significantly enhancing bearing load capacity and service life—particularly suited for demanding long-term continuous operation.

3. High-Pressure Rating – Industrial-Grade Durability

Rated continuous pressure of 250 bar, intermittent pressure of 280 bar, and peak pressure up to 300 bar. Far exceeding standard gear pump pressure ratings, the aluminum alloy housing with precision sealing ensures long-term reliability under high-pressure, high-frequency, continuous-duty operations.

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

Featuring German standard GER80-4 4-bolt flange (pilot diameter 80.0 mm) and tapered shaft 1:5. Fully compliant with international interchange standards—delivers 100% drop-in interchangeability with genuine Casappa PLP20 series tandem pumps.

5. Broad Speed Operating Range

Supports a wide speed range of 500 to 3,500 rpm. Maintains stable flow characteristics from low-speed precision control to high-speed continuous duty—one pump for diverse application requirements.

6. High Cleanliness Standards for Extended Service Life

Maximum allowable contamination level of ISO 4406 19/17/14. Strict cleanliness requirements ensure precision gear pairs and sleeve bearings maintain optimal performance throughout the pump’s service life, extending maintenance intervals.

7. 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 (250 bar), intermittent 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 dual-circuit hydraulic systems, combine harvester implement and steering synchronized drives

• Construction Equipment: Mini-excavators, skid-steer 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, small press hydraulic systems

• Tandem Pump Applications: Systems requiring simultaneous independent hydraulic flow to multiple actuators

Expert Maintenance Tips

1. Inlet Line Requirements

Keep suction lines short and straight with adequate diameter—not less than the port size (inlet GE40). Both inlet ports of the tandem pump must be supplied with sufficient flow independently. 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) .

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. 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

The -L suffix in this model indicates left-hand (counterclockwise) rotation. Always verify that the drive motor/engine rotation matches the pump before installation. Specify right-hand (CW) configuration when ordering if required.

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