Micro Magnetic Gear Pump Motors
Greensky precision motors deliver leak-free, contamination-free fluid transfer for chemical, medical and food-grade applications — compact, efficient, and built for 24/7 duty.
What Is a Micro Magnetic Gear Pump?
A magnetically driven gear pump uses a sealed, static isolation shell to transfer torque from the motor to the pump rotor through magnetic coupling — eliminating the dynamic shaft seal that is the #1 source of leaks. Greensky pairs this pump head with brushless DC, micro AC, closed-loop stepper, or brushed + gearbox motors to match your duty cycle.
Brushless DC (BLDC)
Best efficiency and lifespan for continuous duty; 24–48 V, 10–400 W, fully controllable speed.
View productMicro AC Motor
Simple, robust, mains-powered; ideal for fixed-speed lab and process equipment.
View productClosed-loop Stepper
Precise dosing and repeatable flow without a flow meter; 1.8°/0.9° step, no drift.
View productBrushed DC + Gearbox
Cost-effective high-torque option for intermittent, lower-duty cycles.
View productHow the Magnetic Drive Works
Motor drives outer magnet
The motor shaft rotates a permanent-magnet ring outside the sealed shell.
Field crosses the shell
The magnetic field passes through the static isolation shell with no physical contact.
Inner magnet turns rotor
An inner magnet ring couples and rotates the pump gear set.
Gears displace fluid
Meshing gears move fluid from the inlet to the outlet at a fixed displacement.
Zero leak by design
No shaft penetration means no dynamic seal — eliminating the main leak path.
Motor Selection Parameters
Match the drive to your duty cycle. Below are the typical ranges Greensky offers for magnetic gear-pump duty.
| Series | Motor Type | Voltage | Power | No-load Speed | Rated Speed | Rated Torque | Protection | Insulation | Duty |
|---|---|---|---|---|---|---|---|---|---|
| GS-BL120 | BLDC | 12–24 V | 10–60 W | 3000–8000 rpm | 2000–6000 rpm | 0.03–0.15 N·m | IP54 | Class B | S1 continuous |
| GS-BL240 | BLDC | 24 V | 60–150 W | 3000–6000 rpm | 2000–5000 rpm | 0.15–0.4 N·m | IP65 | Class F | S1 continuous |
| GS-BL480 | BLDC | 48 V | 150–400 W | 3000–6000 rpm | 2000–5000 rpm | 0.4–1.0 N·m | IP65 | Class F | S1 continuous |
| GS-AC90 | Micro AC | 110–230 V | 15–90 W | – | 1400–2800 rpm | 0.05–0.3 N·m | IP54 | Class F | S1 continuous |
| GS-ST57 | Closed-loop stepper | 24–48 V | 20–100 W | 0–3000 rpm | 0–2000 rpm | 0.2–1.2 N·m | IP54 | Class B | S3 intermittent |
| GS-BR60 | Brushed + gearbox | 12–24 V | 10–80 W | 3000–6000 rpm | 30–600 rpm* | 0.1–2.0 N·m* | IP54 | Class F | S2 short-time |
| GS-EX8020 | Explosion-proof BLDC | 24 V | 20–120 W | 3000–6000 rpm | 2000–5000 rpm | 0.1–0.5 N·m | IP65 | Class F | Ex d (optional) |
* After gear reduction. Values are typical engineering ranges — confirm with Greensky technical data before ordering.
| Pump Head | Displacement | Flow @rated | Max Pressure | Viscosity | Media Temp. | Wetted Materials | Compatible Motors |
|---|---|---|---|---|---|---|---|
| MG-0.6 | 0.6 mL/rev | 0.1–1.5 L/min | 3 bar | ≤50 cP | −10…80 °C | PP / PPS / FKM | GS-BL120 / GS-BR60 |
| MG-1.5 | 1.5 mL/rev | 0.2–3 L/min | 5 bar | ≤100 cP | −10…80 °C | PP / PPS / FKM | GS-BL240 / GS-ST57 |
| MG-3.0 | 3.0 mL/rev | 0.5–5 L/min | 6 bar | ≤200 cP | −10…90 °C | PVDF / PEEK / EPDM | GS-BL240 / GS-BL480 |
| MG-5.0 | 5.0 mL/rev | 1–5 L/min | 8 bar | ≤300 cP | −10…90 °C | PVDF / PEEK / PTFE | GS-BL480 / GS-EX8020 |
Sizing the motor power
Use hydraulic power to size the drive:
P (W) ≈ T (N·m) × n (rpm) ÷ 9.55 ÷ η
Example: 0.3 N·m at 3000 rpm, η = 0.7 → P ≈ 0.3 × 3000 ÷ 9.55 ÷ 0.7 ≈ 135 W. Choose GS-BL240 (60–150 W).
3-step selection method
- Define flow & pressure → pick a pump head (Table 2).
- Calculate required torque at rated speed → size motor power.
- Confirm environment (media, temp, IP, Ex) → choose motor series (Table 1).
Not sure? Send your duty point in the inquiry form — our engineers return a matched set within 48 h.
Application Scenarios
Leak-free, low-pulsation transfer is critical wherever the medium is hazardous, valuable, or purity-sensitive.
Chemical & Pharmaceutical
Dosing of acids, solvents and reagents with no cross-contamination.
Medical & Laboratory
Sterile and diagnostic fluid transfer, IV and analyser feed lines.
Food & Beverage
Flavour, syrup and additive dosing with food-grade wetted parts.
Semiconductor & Electronics
Photoresist, developer and CMP slurry circulation in cleanrooms.
Analytical Instruments
Precise reagent metering for chromatography and titration systems.
Printing & Inkjet
Stable ink and coating supply with low pulsation for print quality.
Why Greensky Pump Motors
High Efficiency
BLDC drives reach ≥85% efficiency, cutting energy and heat in sealed systems.
Low Noise
Precision balancing keeps operating noise ≤45 dB(A) for lab and medical use.
Long Life
Brushless design delivers ≥20,000 h service life in continuous duty.
Explosion-proof Option
Ex d certified variants for solvent and flammable-media transfer.
Precise Control
Closed-loop speed accuracy ±1% with analogue / PWM / RS-485 interface.
View controllerCompact & Custom
Short-body motors and custom shafts, flanges and cables for OEM integration.
View custom motorsProduct & Principle Diagrams
The motor never touches the pumped fluid — torque crosses the shell magnetically.
Gear meshing displaces fluid from inlet to outlet at a fixed displacement per revolution.
Flow scales linearly with speed; peak efficiency sits at 60–90% of rated speed.
Compact footprint for bench-top and skid-mounted systems; custom lengths on request.
Engineering Questions
Request a Pump Motor Solution
Get a Custom Motor Quote
Email: mkt@greensky-power.com
WhatsApp: +86 153 3651 7669
Location: No.597 Bin ‘an, Hangzhou, China 310052
Response: Quote in 24 h · Solution in 48 h
Lead time: Samples 7–15 days · Mass 25–35 days
Greensky Power — BLDC / brushed DC / micro AC / stepper motors since 2011, ISO & CE, serving 50+ countries.
