CBW-F304-CBN-E304-CBT-F306 Hydraulic Gear Pump 20MPa 2000rpm

Product Overview

The CBW / CBT / CBN-E/F series external gear pumps are among the most widely used general-purpose high-pressure gear pump families in the Chinese hydraulic industry. This product line covers three major platforms—CBW-F300 series, CBT-F3/F5 series, and CBN-E/F300 series—with displacement ranges from 4 to 25 ml/r (CBT-F5 series extends to 25–100 ml/r) and rated pressures from 16 to 20 MPa, with peak pressures up to 25 MPa.

Engineered with precision-ground gear pairs, high-strength aluminum alloy housings, floating bushings, and DU self-lubricating bearings, the pumps deliver compact structure, light weight, high efficiency, low noise, and reliable operation.

Every unit is manufactured to original equipment specifications, ensuring 100% drop-in interchangeability with genuine CBW/CBT/CBN series 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 original equipment. All brand names and model codes are referenced solely to indicate compatibility and interchangeability. This product is manufactured by an independent producer.

Technical Specifications 

CBW-F300 Series (Gear Module m=3)

• Series: CBW-F300 high-pressure gear pump

• Pressure Grade: F (rated 20 MPa, peak 25 MPa)

• Gear Module: m=3

• Speed Range: min 800 rpm, rated 2500 rpm, max 3000 rpm

• Volumetric Efficiency: ≥90% – 93% (varies by displacement)

• Housing Material: High-strength aluminum alloy

• Weight: 2.3 – 3.1 kg (varies by displacement)

Displacement & Pressure by Model:

• CBW-F304-****: 4 ml/r, rated 20 MPa, peak 25 MPa

• CBW-F306-****: 6 ml/r, rated 20 MPa, peak 25 MPa

• CBW-F308-****: 8 ml/r, rated 20 MPa, peak 25 MPa

• CBW-F310-****: 10 ml/r, rated 20 MPa, peak 25 MPa

• CBW-F314-****: 14 ml/r, rated 20 MPa, peak 25 MPa

• CBW-F316-****: 16 ml/r, rated 20 MPa, peak 25 MPa

• CBW-F320-****: 20 ml/r, rated 20 MPa, peak 25 MPa

CBT-F3 Series (Gear Module m=3)

• Series: CBT-F3 high-pressure gear pump

• Pressure Grade: F (rated 20 MPa, peak 25 MPa)

• Gear Module: m=3

• Rated Speed: 2000 rpm

• Maximum Speed: 3000 rpm

• Minimum Speed: 600 rpm

• Volumetric Efficiency: ≥90%

• Housing Material: High-strength aluminum alloy

Displacement & Pressure by Model:

• CBT-F304: 4 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F306: 6 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F308: 8 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F310: 10 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F312: 12.5 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F314: 14 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F316: 16 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F320: 20 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F325: 25 ml/r, rated 20 MPa, peak 25 MPa

CBT-F5 Series (Gear Module m=5)

• Series: CBT-F5 high-pressure gear pump

• Pressure Grade: F (rated 20 MPa, peak 25 MPa)

• Gear Module: m=5

• Rated Speed: 2000 rpm

• Maximum Speed: 2500 rpm

Displacement & Pressure by Model:

• CBT-F525: 25 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F532: 32 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F550: 50 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F563: 63 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F580: 80 ml/r, rated 20 MPa, peak 25 MPa

• CBT-F5100: 100 ml/r, rated 20 MPa, peak 25 MPa

CBN-E/F300 Series (Gear Module m=3)

• Series: CBN-E/F300 high-pressure gear pump

• Pressure Grade: E (rated 16 MPa, peak 20 MPa) / F (rated 20 MPa, peak 25 MPa)

• Gear Module: m=3

• Rated Speed: 2000 rpm

• Maximum Speed: 3000 rpm

• Volumetric Efficiency: ≥91% – 95% (varies by displacement)

• Overall Efficiency: ≥82% – 85% (varies by displacement)

• Housing Material: High-strength aluminum alloy

Displacement & Pressure by Model:

• CBN-E(F)304: 4 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)306: 6.3 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)308: 8 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)310: 10 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)312: 12.5 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)314: 14 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)316: 16 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)318: 18 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)320: 20 ml/r, E-rated 16 MPa / F-rated 20 MPa

• CBN-E(F)325: 25 ml/r, E-rated 16 MPa / F-rated 20 MPa

Key Technical Advantages

1. Automatic Axial Clearance Compensation & Radial Hydraulic Balance

Floating bushings with pressure-balanced mechanisms automatically compensate for gear end wear under high pressure. Combined with radial hydraulic balance design, this significantly reduces internal leakage and maintains high volumetric efficiency (≥91%–95%) across the full pressure range.

2. High-Strength Aluminum Alloy Housing & DU Self-Lubricating Bearings

The high-strength aluminum alloy housing delivers lightweight construction with excellent pressure containment. DU self-lubricating bushings significantly enhance bearing load capacity and wear resistance while reducing friction losses.

3. Precision-Ground Gears & Low-Noise Operation

Precision-machined gear pairs with optimized tooth profiles ensure smooth meshing and reduced pressure pulsation, delivering low-noise operation ideal for noise-sensitive industrial and mobile equipment applications.

4. Wide Speed & Operating Range

Supports a broad speed range of 600–3000 rpm, maintaining stable flow characteristics whether operating at low-speed precision control or high-speed continuous duty.

5. Modular Selection & 100% Drop-In Interchangeability

Offers a complete product matrix with two pressure grades—E (16 MPa) and F (20 MPa)—and displacements from 4 to 100 ml/r. All models are manufactured to original equipment mounting dimensions and interface standards, ensuring 100% drop-in interchangeability with zero system modifications.

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 across rated pressure, peak pressure, and full speed range—ensuring zero-defect, plug-and-play performance upon installation.

Application Areas

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

• Construction Equipment: Mini-excavators, loaders, bulldozer auxiliary hydraulic systems

• Industrial Equipment: Machine tool hydraulic systems, injection molding machine power units, press lubrication and cooling systems

• Mobile Equipment: Dump truck hoist systems, forklift hydraulics, aerial work platforms

• Lifting & Transport Machinery: Crane hydraulic systems, material handling equipment

• Mining & Light Industry: Mining machinery hydraulics, light industrial automation equipment

Expert Maintenance Tips

1. Inlet Line Requirements

Keep the suction line as short and straight as possible with adequate diameter (not less than the port size) 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 suction filter with β10 ≥ 100 and a return-line filter with ≤10 μm absolute filtration rating.

3. Coupling Alignment Precision

Ensure pump shaft-to-drive shaft coaxiality deviation ≤0.05 mm and angular deviation ≤0.5°. Use flexible couplings to compensate for installation tolerances and prevent radial loads from being transmitted to pump shaft bearings.

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. Rotation Direction Confirmation

All series are standard configured for right-hand rotation (clockwise/CW). Always verify that the drive motor/engine rotation direction matches the pump before installation. Specify left-hand rotation configurations when ordering if required.