Product Overview
The CBW, CBQ, CBF, and CBN Series are widely used high-pressure external gear pumps in the Chinese hydraulic industry, manufactured by leading companies including Hefei Changyuan Hydraulic (HCHC), Shanghai Shuangxu, and Wuxi Detian. Featuring high-strength aluminum alloy / cast iron housings with precision gears and axial clearance floating compensation technology, these pumps offer compact structure, small size, light weight, high pressure, low noise, and long service life. They are widely applied in construction machinery, agricultural machinery, mining equipment, forklifts, and industrial hydraulic systems.
This page features four models:
CBW-F306-ALP: 6 cc/rev displacement, F-class pressure (20 MPa)
CBW-F320-ALP: 320 cc/rev displacement, F-class pressure (20 MPa)
CBF-E25LPL: 25 cc/rev displacement, E-class pressure (16 MPa)
CBW-F316-ALP: 16 cc/rev displacement, F-class pressure (20 MPa)
CBW/*3 Series gear pumps feature high-precision gears, high-strength aluminum alloy housings, floating bushings, and DU bearings, delivering simple construction, light weight, high efficiency, low noise, and reliable operation. As original specification models within these mainstream gear pump series, these products enable direct form-fit-function interchangeability with original units—no modifications to piping or mounting interfaces required. Our replacement solutions strictly adhere to original technical standards and undergo 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products.
Technical Specifications
Model 1: CBW-F306-ALP
Applicable Model:
Model Code Breakdown (per domestic gear pump naming convention):
CBW — Product code: High-pressure gear pump series
F — Pressure grade: F = 20 MPa
3 — Gear modulus (modulus 3)
06 — Nominal displacement: 6 mL/r
ALP — Mounting configuration: A = Diamond flange, LP = specific configuration
This Model Detailed Specifications (per mainstream manufacturer data):
Geometric Displacement: Approx. 6 mL/r
Rated Pressure: 20 MPa (200 bar)
Maximum Pressure: 25 MPa (250 bar)
Rated Speed: Approx. 2,000 r/min
Maximum Speed: 3,000 r/min
Volumetric Efficiency: ≥ 85%
Rotation Direction: Clockwise (viewed from shaft end), bi-rotational optional
Housing Material: High-Strength Aluminum Alloy
Fluid Compatibility: Mineral-based hydraulic oil, anti-wear hydraulic oil (CLP), viscosity 16-47 cSt
Fluid Temperature Range: -20°C to +80°C
Mounting Type: Diamond Flange
Shaft Types: Parallel key, rectangular spline, flat key optional
Weight: Approx. 4-6 kg (model dependent)
Model 2: CBW-F320-ALP
Applicable Model:
Model Code Breakdown:
CBW — Product code: High-pressure gear pump series
F — Pressure grade: F = 20 MPa
3 — Gear modulus (modulus 3)
20 — Nominal displacement: 20 mL/r
ALP — Mounting configuration
This Model Detailed Specifications (per mainstream manufacturer data):
Geometric Displacement: 320 mL/r
Rated Pressure: 20 MPa (200 bar)
Maximum Pressure: 25 MPa (250 bar)
Rated Speed: 1,500 r/min
Maximum Speed: 2,000 r/min
Volumetric Efficiency: ≥ 90% (at rated conditions)
Drive Power: Approx. 105 kW (at rated pressure and speed)
Viscosity Range: 20 – 200 cSt
Recommended Oil Temperature: 10°C – 60°C
Housing Material: Cast Iron / Aluminum Alloy optional
Mounting Flange: SAE 2-bolt / SAE 4-bolt
Model 3: CBF-E25LPL
Applicable Model:
Model Code Breakdown (per CBF Series naming convention):
CBF — Product code: Gear pump series
E — Pressure grade: E = 16 MPa
25 — Nominal displacement: 25 mL/r
LPL — Mounting configuration: L = Left-hand rotation, PL = specific configuration
This Model Detailed Specifications (per mainstream manufacturer data):
Geometric Displacement: 25 mL/r
Rated Pressure: 16 MPa (160 bar)
Peak Pressure: 20 MPa (200 bar)
Rated Speed: 2,500 r/min
Maximum Speed: 3,000 r/min
Volumetric Efficiency: ≥ 92%
Overall Efficiency: ≥ 84%
Rated Drive Power: 19.5 kW
Weight: 4.0 kg
Housing Material: Aluminum Alloy
Mounting: Per specific configuration
Model 4: CBW-F316-ALP
Applicable Model:
Model Code Breakdown:
CBW — Product code: High-pressure gear pump series
F — Pressure grade: F = 20 MPa
3 — Gear modulus (modulus 3)
16 — Nominal displacement: 16 mL/r
ALP — Mounting configuration
This Model Detailed Specifications (per mainstream manufacturer data):
Geometric Displacement: 16 mL/r
Rated Pressure: 20 MPa (200 bar)
Maximum Pressure: 25 MPa (250 bar) / Peak up to 28 MPa
Speed Range: 600 – 3,000 r/min
Volumetric Efficiency: ≥ 92%
Weight: Approx. 3.1 kg
Housing Material: High-Strength Aluminum Alloy
Rotation Direction: Per specific configuration
Mounting Type: Diamond Flange
Key Technical Advantages
1. High-Strength Aluminum/Cast Iron Housing — Lightweight with Durability
CBW/*3 Series feature high-strength aluminum alloy housings (with cast iron options for larger displacements), significantly reducing overall weight while maintaining strength. Aluminum housings offer excellent heat dissipation and easy installation.
2. Axial Clearance Floating Compensation — High Volumetric Efficiency
Advanced axial clearance floating compensation technology, combined with DU self-lubricating bearings, automatically compensates for gear end-face clearances under pressure, significantly minimizing internal leakage. CBW-F316-ALP achieves ≥ 92% volumetric efficiency, while CBF-E25LPL achieves ≥ 92%.
3. Precision Gears with Low-Noise Design
High-precision gear pairs with optimized gear engagement effectively reduce operating noise and pressure pulsation. CBW Series are renowned for low noise and vibration resistance, with CBW-F316-ALP featuring low noise and reliable operation.
4. Flexible Configuration Options for Wide Adaptability
CBW Series offer multiple mounting types (Diamond flange A, Oval flange C, etc.), shaft types (parallel key, rectangular spline, flat key, etc.), and port connections (threaded, flanged). CBW-F320 Series offer CLP, ALP, AFP, AFHL suffix options for different flange and shaft requirements.
5. Wide Speed Range with Environmental Adaptability
CBW Series cover a speed range of 600–3,000 r/min, with a viscosity range of 16–760 cSt and fluid temperature range of -20°C to +80°C, adapting to diverse operating conditions.
Application Areas
Construction Equipment: Excavator and wheel loader hydraulic working systems
Agricultural Machinery: Tractor and combine harvester hydraulic systems
Material Handling Equipment: Forklift hydraulic systems, aerial work platforms
Mining Equipment: Shearer and roadheader hydraulic systems
Industrial Hydraulic Systems: Industrial power units, machine tools, plastic machinery
Specialty Vehicles: Garbage compactor and street sweeper hydraulic systems
Expert Maintenance Tips
1. Installation Precautions
CBW/CBF Series are uni-directional rotation pumps—verify the system’s required rotation direction matches the pump’s marking before installation. CBF-E25LPL’s LPL suffix indicates left-hand rotation.
Mounting brackets must have adequate rigidity and alignment accuracy; shaft concentricity error should be < 0.1 mm.
Suction lines should be short and straight to ensure adequate suction and prevent cavitation. Suction pressure must not fall below -0.03 MPa.
2. Fluid Management
Use anti-wear hydraulic oil (CLP) with viscosity of 16-47 cSt. CBW-F320 Series operates with 20-200 cSt.
Fluid cleanliness is critical—recommended NAS Class 9 or higher. Install suction filter ≤ 100 μm.
Long-term operating oil temperature should be maintained at 30-60°C, not exceeding 80°C.
3. Start-Up & Commissioning
Fill the pump with clean hydraulic fluid through the suction port before initial start-up. Never run dry.
Use jog start to purge air, then run under no-load for several minutes.
Verify correct rotation direction—incorrect rotation will immediately damage the pump.
For cold starts, run under low load until oil temperature reaches normal operating range.
4. Routine Maintenance
CBW/CBF gear pumps themselves are maintenance-free; however, regular maintenance of the entire hydraulic system is essential.
Regularly inspect oil level, oil quality, and filters. If abnormal noise, vibration, or flow reduction occurs, stop immediately for inspection.
Regularly replace return line filters and suction strainers to prevent contaminant ingress.
