440C High Precision Metering Gear Pump For Micro Gravure Coating

Its gears and key flow parts adopt 440C stainless steel, heat-treated to HRC 58–62, featuring outstanding wear resistance. It works reliably for coating fluids containing fillers, pigments and fine solid particles, such as UV glue, acrylic adhesives, functional coating slurries.

As a positive displacement metering pump, it delivers low pulsation flow with high metering accuracy up to ±0.5%. Combined with a servo drive system, it provides stable micro-flow supply to ensure uniform coating thickness for ultra-thin coating layers.

It handles media ranging from low to medium viscosity, widely applied to optical films, lithium battery separators, release films, PET protective films and other flexible substrate coating lines. Optional configurations: PEEK / ceramic bearings, double mechanical seals, heating jacket structure. Custom displacement available, compatible with most domestic and imported micro gravure coating machines.

FAQ:

Q: Why is 440C stainless steel used?
A: 440C offers high hardness after quenching and excellent wear resistance. Compared to 316L, it is better suited for coating slurries containing powder fillers; it ensures that gear clearances do not increase significantly during long-term operation, thereby maintaining consistent metering precision. It also provides good corrosion resistance against common solvents and UV-curable adhesives.
Q: What is the applicable viscosity range?
A: It can handle coating media with a viscosity range of 5–50,000 mPa·s, allowing for the stable transport of materials ranging from low-viscosity UV adhesives to medium-viscosity resin slurries.
Q: What is the metering precision?
A: When paired with a servo system, it achieves a steady-state precision of ±0.5%, meeting the requirements for ultra-thin micro-gravure coating.
Q: Can the pump head be purchased separately?
A: Yes, the pump head can be supplied individually, or as a complete assembly including a servo motor and a gear reducer.

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