Technical Articles on Micro Gear Pumps

The rapid expansion of AI computing has made liquid cooling essential in data centers, yet delivering low-viscosity, volatile refrigerants like Freon and fluorinated fluids poses significant technical challenges. Over 50% of pump failures stem from poor compatibility, including insufficient dry-run and self-priming capabilities. The Suofu NP series micro magnetic gear pump addresses these issues through optimized materials, gear geometry, and structural design, enabling reliable dry-running, strong self-priming, and high-pressure tolerance across diverse refrigerant types. Read More

Zirconia (ZrO₂) ceramic shafts significantly outperform 316L stainless steel and alumina ceramic shafts in micro magnetic gear pumps. Offering superior fracture toughness, flexural strength, wear resistance, and corrosion resistance, they enable high precision (±0.1%), extended service life (>20,000 hours), and reliable dry-running capability. These properties make them the ideal choice for demanding applications in medical devices, semiconductor manufacturing, and chemical processing. Read More

The transition to MW-class liquid-cooled ultra-fast charging piles presents a critical cooling challenge, as centrifugal pumps struggle with the high flow resistance and viscosity demands beyond 600KW. Suofu's magnetic gear pumps, particularly the NP350 model, are positioned as a specialized solution, offering high differential pressure (7-8 bar), zero leakage, wide temperature tolerance (-55°C to 90°C), and compatibility with various coolants. These features are designed to ensure stable, high-speed coolant circulation for full-power output and minimal maintenance, addressing core requirements like overcoming line resistance and preventing leakage in high-power charging systems. The company's extensive field deployment and validation with leading operators are cited as key credentials. Read More

Gear pumps are generally suitable for conveying clean, particle-free liquids. Their operating principle relies on the meshing of gears with very fine internal clearances. Solid particles larger than these clearances, typically on the order of 0.02mm in some micro pump models, can cause seizure. Furthermore, particles entering the meshing gear teeth or bearing surfaces cause accelerated wear, significantly reducing service life. Therefore, their application is limited for media containing abrasives. The required internal clearance decreases when handling low-viscosity fluids or operating under high pressure differentials, further increasing sensitivity to particulate contamination. Read More

Suofu NP series micro magnetic gear pumps feature leak-free operation, high pressure, and the ability to handle gas-liquid two-phase flows, making them suitable for small cooling systems using various fluorocarbons. As these fluids are prone to vaporization, specific system configurations are recommended for reliable operation. Key guidelines include maintaining approximately 2°C of subcooling before the pump, controlling inlet flow velocity, using a large-radius 90° elbow, and installing a high-flow 400-mesh filter. A controlled startup at low speed (e.g., 500 rpm) and a venting procedure via a return line with motor current monitoring are advised to purge inlet gas before reaching full operating speed. Read More

The Suofu NP series micro magnetic gear pumps are engineered for cooling and refrigeration systems. Their defining features—leak-free operation, dry-running capability, strong self-priming, and minimal flow fluctuation under pressure changes—make them particularly suitable for handling volatile, low-viscosity refrigerants like various fluorocarbons and fluorinated fluids. These pumps excel in applications requiring precise temperature control, high-pressure microchannel systems, and environments with wide temperature ranges (-40°C to 150°C, extendable to -120°C). The magnetic drive and optional fully welded construction ensure zero leakage, while the design allows for flexible customization in motor type, installation, and configuration to meet diverse system integration needs. Read More