HG Series High-Pressure Internal Gear Pump (Single & Multiple Configurations)
Guangdong Haozheng Hydraulic Equipment Co., Ltd. specializes in manufacturing high-efficiency HG series high-pressure internal gear pumps. As shown in our product lineup image image_7645a8.jpg, we provide a complete matrix of single pumps and heavy-duty multiple/double pump combinations. Utilizing a specialized internal pinion and internal gear ring setup with radial and axial pressure compensation, the HG series represents the global standard for modern servo-hydraulic speed-controlled drives.
As an established global B2B hydraulic partner, Haozheng supplies complete HG gear pumps and precision internal rotating assemblies with 100% dimensional and operational interchangeability with original VOITH units [cite: Gemini Chat. Evidence: Direct identification of the company name while requesting SEO content and optimization for the website haozheng.ru. Date: 2026-05., Gmail. Evidence: Management of domain names and product listings for haozhenghydraulic.com and hydraulic-pumpparts.com. Date: 2024-11 to 2026-04.]. To eliminate mechanical failures and ensure out-of-the-box reliability in continuous factory automation, every unit is rigorously audited under maximum pressure loads on our advanced hydraulic test benches before global maritime shipment.
Technical Parameters & Model Selection Guide
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Design Type: Internal gear pump with radial & axial sealing compensation (内啮合压力补偿)
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Nominal Pressure: 250 Bar (25 MPa)
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Peak Pressure: Up to 300 Bar (30 MPa)
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Displacements Available: 8 cc/rev to 160 cc/rev
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Combination Capability: Flexible dual or triple pump configurations using common drive shafts
| Frame Size | Displacement Range (cc/rev) | Interchangable Reference Models | Configuration Types (See image_7645a8.jpg) |
| HG Size 10 | 8.0 / 10.0 / 13.0 / 16.0 | HG10-8, HG10-10, HG10-13, HG10-16 | Single Pump / First Stage of Double Pump |
| HG Size 11 | 20.0 / 25.0 / 32.0 / 40.0 | HG11-20, HG11-25, HG11-32, HG11-40 | Single Pump / Multi-stage Combination |
| HG Size 25 | 63.0 / 80.0 / 100.0 / 125 / 160 | HG25-63, HG25-80, HG25-100, HG25-125 | Heavy-Duty Single / Primary Driving Stage |
Engineered for Precision Control & Zero-Noise Factory Ecosystems
Thanks to its minimal pressure pulsation and unique internal helical gear layout, our HG series pumps are highly valued by original equipment manufacturers (OEMs) specializing in energy-saving servo systems:
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Plastic Injection Molding Machines (伺服注塑机): The primary internal gear pump choice for Haitian, Chen Hsong, and European-style modern servo-driven injection units requiring long pressure-holding cycles.
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Die Casting Equipment (压铸机): Providing rapid flow delivery and steady pressure thresholds for heavy aluminum and zinc alloy die-cast molding cells.
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Sheet Metal CNC Press Brakes (数控折弯机/剪板机): Enabling whisper-quiet operation and smooth transition speeds in precision metal bending and punching machinery.
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Industrial Hydraulic Power Units (通用伺服液压站): Powering automated plant packaging loops, heavy clamping mechanisms, and continuous facility automation lines.
The Haozheng Advantage: Ultimate Precision Machining & Dynamic Load Audit
Sourcing your high-pressure gear units from Guangdong Haozheng Hydraulic Equipment Co., Ltd. ensures premium B2B quality control engineered to minimize factory line stoppages:
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100% Drop-In Interchangeability: All mounting flanges, shaft splines, and port positions conform exactly to VOITH standards, allowing trouble-free drop-in replacement of existing plant pumps.
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Extreme Noise Suppression Diagnostics: Every gear pump is audited on our customized test benches to verify that its operating acoustic footprint matches international standards, ensuring true low-noise performance in servo loops.
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Standard Export Moisture-Proof Sealing: Heavy assemblies are protected with specialized anti-corrosion barriers, moisture-sealed, and securely balanced inside standard export fumigation-free wooden cases to endure long-distance ocean freight.
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Flexible Modular Combinations: As visualized in HG GEAR PUMP, we can rapidly customize multi-stage double or triple pumps combining different displacements to fit your specific multi-circuit hydraulic schematic.
Frequently Asked Questions (FAQ)
Q1: Why is the HG internal gear pump preferred over external gear pumps in servo systems? A: Internal gear pumps feature an active radial and axial gap compensation design. This means that as pressure increases, internal sealing elements press tighter against the gears, keeping volumetric efficiency extremely high (often above 95%) even at low motor speeds during pressure-holding phases. Furthermore, they generate up to 20 dB less noise than traditional external gear units.
Q2: Can I combine an HG11 pump with an HG10 pump as a custom double-stage block? A: Yes, absolutely. As demonstrated in HG GEAR PUMP, the HG series features a highly flexible modular structure. By using specialized through-drive adapter blocks and high-tensile internal coupling links, we can build custom dual or multiple-flow outputs customized to separate system cylinder demands.
Q3: What critical preventative maintenance avoids cavitation in HG high-pressure pumps? A: Due to the tight sealing clearances inside internal gear designs, they are highly sensitive to suction line vacuum levels. Always ensure the suction line is wide enough, that suction oil filters are cleaned regularly, and that you are using high-quality anti-wear hydraulic fluids to prevent air bubbles from destroying internal gear surfaces.
Request a Customized Quote on Single & Multi-Stage HG Gear Pumps
Upgrading a facility’s injection molding fleet, developing a series of high-precision CNC press brakes, or seeking a premium wholesale supplier for interchangeable gear parts? The technical consultants at Guangdong Haozheng Hydraulic are fully prepared to decode your parameters.
📬 Contact Our Engineers: Click the button below to send your required configuration blueprint, desired multi-stage layout , or target VOITH part codes. We will deliver a comprehensive technical and commercial quotation within 12 hours.
