Gear Metering Pump For Vacuum Discharge

The pump body can be equipped with a heating jacket (using thermal oil, steam, or electric heating) to prevent substances such as resins, polyols, isocyanates, bitumen, and polymers from cooling, crystallizing, or solidifying. Precision-engineered meshing components maintain tight clearances, minimizing backflow; the pump also supports various sealing configurations-including dual mechanical seals, single mechanical seals, and magnetic couplings-to prevent air ingress that could compromise vacuum systems.
Flow rate is linearly proportional to rotational speed, with control provided by servo-driven variable-frequency drives, ensuring a metering repeatability of ≤±1%. Designed for high-temperature, high-viscosity, and crystallization-prone materials, the pump is ideal for applications involving vacuum discharge, circulation, and precise quantitative transfer. It is widely used in processes such as fine chemical production, resin synthesis, polyurethane manufacturing, distillation and purification, lithium-battery material production, and the processing of flavors and fragrances.

Key Features

High vacuum suction performance, anti-air-inrush design

Heating jacket (thermal oil / steam / electric heating optional)

High precision dosing, low pulsation, servo controllable

Wetted parts: SUS316L, 304; gears: 440C,304,316

FFKM / PTFE / magnetic seal options for corrosive media

Explosion-proof motor optional for hazardous area

Direct flange mounting under vacuum reactor

Applicable Media & Processes

Suitable for media free of hard particles: epoxy resins, polyurethane prepolymers, polyols, cardanol, bitumen, rosin, fragrances/flavorings, pharmaceutical intermediates, oligomers, and high-viscosity additives.

Typical Processes:
Molecular distillation, vacuum distillation, thin-film evaporation, discharge from vacuum reactors, and vacuum-circulating purification.

FAQ:

Q: What is the max vacuum it can work?

A: Stable operation under -0.1013 MPa high vacuum.

Q: Can it handle crystallizable material?

A: Yes, heating jacket keeps medium at constant temperature to avoid solidification.

Q: Can it run without liquid?

A: Dry running strictly forbidden, will damage gears and bearings.

Q: What viscosity range?

A: Suitable for medium & high viscosity liquids, up to hundreds of thousands cP (depends on model)

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