Overview
This internal gear pump is engineered for hydraulic systems that demand quiet operation, compact installation space, and consistent volumetric efficiency. Unlike external gear designs, the internal gear pump features a rotor (external gear) meshing with an internal gear ring, creating a smooth, gradual opening and closing of the volume chambers. This design significantly reduces flow pulsation and noise, making it an ideal hydraulic gear pump for precision industrial applications.
ey Features & Advantages
Low Noise & Minimal Pulsation: The internal gear meshing principle ensures smooth fluid delivery with reduced pressure spikes, resulting in quieter operation compared to external gear pumps .
Compact & Lightweight: Fewer parts and a coaxial design allow for a smaller footprint, making it easy to integrate into tight machine envelopes .
Excellent Suction Performance: Internal gear pumps handle higher speeds and viscous fluids well, maintaining stable suction even under demanding conditions .
Durable & Reliable: With proper material selection and precision machining, this hydraulic gear pump offers long service life even in continuous-duty cycles .
High Volumetric Efficiency: Advanced clearance control and wear compensation designs help maintain efficiency over extended use .
Basic structure
HG series hydraulic pump is a engaged gear pump with fixed displacement.
Its basic components are: front cover (1), pump body (2), rear cover (3), gear shaft (4), inner tooth ring (5),
slidingbearing (6), front and rear plate (7) and positioning rod (8), and radial compensation mechanism composed
of crescent auxiliaryplate (9), crescent motherboard (10) and plastic rod (11)
nal gear pump
Technical parameter
HG series hydraulic internal gear pump
| Serial number | Specifications | Displacement（ml/r） | Working pressure — Rated（bar） | Working pressure — Highest（bar） | Speed — Highest（r/min） | Speed — Lowest（r/min） | Weight（kg） |
|---|---|---|---|---|---|---|---|
| HG0 | 3.5 | 3.6 | 315 | 350 | 3600 | 400 | 4 |
| HG0 | 5 | 5.2 | 315 | 350 | 3600 | 400 | 4.2 |
| HG0 | 6.3 | 6.4 | 315 | 350 | 3600 | 400 | 4.4 |
| HG0 | 8 | 8.2 | 315 | 350 | 3600 | 400 | 4.6 |
| HG0 | 10 | 10.2 | 315 | 350 | 3600 | 400 | 4.8 |
| HG0 | 13 | 13.3 | 315 | 350 | 3000 | 600 | 4.9 |
| HG0 | 16 | 16.0 | 315 | 350 | 3000 | 600 | 5.2 |
| HG0 | 20 | 20.0 | 250 | 300 | 3000 | 600 | 5.6 |
| HG1 | 25 | 25.3 | 315 | 350 | 3000 | 200 | 14.5 |
| HG1 | 32 | 32.7 | 315 | 350 | 3000 | 200 | 15 |
| HG1 | 40 | 40.1 | 315 | 350 | 3000 | 200 | 16 |
| HG1 | 50 | 50.7 | 315 | 350 | 3000 | 200 | 17 |
| HG1 | 63 | 63.7 | 250 | 300 | 3000 | 200 | 18.5 |
| HG2 | 80 | 81.4 | 315 | 350 | 3000 | 200 | 43.5 |
| HG2 | 100 | 100.2 | 315 | 350 | 3000 | 200 | 45.5 |
| HG2 | 125 | 125.3 | 315 | 350 | 3000 | 200 | 48 |
| HG2 | 160 | 162.8 | 210 | 260 | 3000 | 200 | 52 |
Company Profile
About Shandong Taifeng Intelligent Control Co., Ltd. Established in 2000, Shandong Taifeng Intelligent Control Co., Ltd. is a leading high-tech manufacturer specializing in the R&D, engineering, and precision manufacturing of high-end hydraulic components and electro-hydraulic integrated systems. Covering a modern industrial footprint of over 200,000 m², Taifeng is recognized as a National Manufacturing Single Champion Demonstration Enterprise and a National "Little Giant" Enterprise in China's fluid power industry.
Core Manufacturing & Technical Strengths:
Comprehensive Product Matrix: Industry-leading developer of two-way cartridge valves, multi-way directional valves, prefill valves, high-pressure cylinders, axial piston pumps, and customized electro-hydraulic manifold blocks.
Advanced Manufacturing Ecosystem: Equipped with high-precision CNC machining centers, automated grinding lines, and world-class inspection facilities ensuring micron-level machining tolerances.
R&D & Patent Portfolio: Backed by a dedicated hydraulic research center and over 100 authorized national patents (including multiple breakthrough invention patents).
International Certifications: Fully certified under ISO9001 (Quality Management), ISO14001 (Environmental Management), ISO45001 (Occupational Health & Safety), and CE standards.
Global Applications: Widely deployed in heavy forging machinery, metallurgy, marine engineering, mobile construction equipment, plastics machinery, and renewable energy sectors worldwide.
