I use the 2.20 L/min target as the starting point when selecting a micro magnetic gear pump for a compact fluid-handling system. This flow rate equals approximately 132 L/h or 36.7 mL/s, but the actual delivered flow will depend on speed, pressure, fluid viscosity, temperature, and system resistance. In this guide, I explain how I evaluate pump type, materials, operating conditions, supplier support, and purchasing risks before recommending a pump for a B2B application.
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A suitable 2.20 L/min micro magnetic gear pump should provide stable metering in a small package while keeping the pumped liquid separated from the motor drive through magnetic coupling. I do not treat flow rate alone as sufficient for selection. I first match the pump to the fluid, pressure, duty cycle, motor requirements, control method, and installation environment.
This guide is intended for engineers, equipment manufacturers, system integrators, purchasing teams, and distributors sourcing a compact pump around 2.20 L/min. It is especially relevant when conventional shaft-sealed pumps create concerns about leakage, contamination, maintenance access, or limited installation space. I also recommend this selection process for OEM buyers who need a repeatable pump specification for equipment production.
The guide is not a substitute for application testing. If the fluid is abrasive, highly viscous, chemically aggressive, temperature-sensitive, or likely to contain particles, I recommend confirming compatibility with the pump supplier before placing a production order.
A micro magnetic gear pump uses rotating gears to transfer liquid through the pump chamber. Instead of connecting the motor shaft directly to the driven gear through a conventional dynamic seal, a magnetic coupling can transmit torque across a containment barrier. This design can help reduce the risk of fluid leakage through a rotating shaft seal, although the final result still depends on pump construction, pressure, installation, and operating conditions.
The 2.20 L/min specification describes a nominal flow requirement, not a complete performance guarantee under every condition. A pump may produce different flow at different discharge pressures, motor speeds, fluid viscosities, and temperatures. I therefore request a performance curve or application-specific confirmation rather than selecting only from a catalogue flow number.
I normally compare the wetted materials first because chemical compatibility has a direct effect on service life and safety. Depending on the design, the pump body may use engineering plastic, aluminum alloy, stainless steel, or another specified material, while gears, shafts, bearings, seals, and magnetic components may use different materials. The correct combination must be evaluated against the fluid’s chemical composition, temperature, viscosity, and particle content.
For clean and relatively low-particle liquids, a micro gear pump can be practical for compact transfer and dosing systems. For abrasive slurries, crystallizing liquids, or fluids with poor lubricity, I treat the application as higher risk and request material and durability guidance from the manufacturer. A magnetic coupling does not automatically make a pump compatible with every chemical or operating condition.
| Specification | Why It Matters | Information to Confirm |
|---|---|---|
| Target flow | Defines the required transfer capacity | 2.20 L/min at a stated pressure and fluid condition |
| Pressure or system resistance | Influences delivered flow, motor load, and heat | Operating pressure, maximum pressure, and pressure fluctuations |
| Fluid properties | Affects materials, leakage risk, and pump performance | Viscosity, temperature, density, chemical composition, and particles |
| Motor and control | Determines speed adjustment and system integration | Voltage, current, speed range, feedback, and control interface |
| Port and dimensions | Ensures mechanical and piping compatibility | Inlet, outlet, thread or tube connection, mounting pattern, and envelope |
I also distinguish between nominal flow, minimum controllable flow, and maximum recommended operating flow. If the equipment needs variable dosing, I ask whether the flow can be adjusted by motor speed and whether the pump remains stable at the lower end of the required range. I avoid assuming that a pump rated near 2.20 L/min will automatically provide accurate dosing without calibration.
A 2.20 L/min micro magnetic gear pump may suit compact liquid circulation, reagent transfer, analytical equipment, printing systems, cooling subsystems, lubrication circuits, and other OEM equipment where the liquid is compatible and the pressure requirement is within the pump’s capability. The best fit is usually a system with clean fluid, controlled operating conditions, and enough space for correct tubing and electrical connections. I evaluate the complete fluid path rather than the pump in isolation.
For example, I would not approve a pump based only on “2.20 L/min” if the system has narrow tubing, a long discharge line, a high static lift, or a viscous liquid. These factors can increase resistance and reduce the actual flow. The supplier should assess the operating point using the intended fluid and pressure rather than relying on a general catalogue value.
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I start with the liquid because it determines many downstream decisions. I document the normal and maximum temperature, viscosity range, chemical exposure, lubrication characteristics, and whether solids are present. If the fluid formulation may change, I provide the supplier with the complete range instead of one typical value.
The required point should be expressed as a combination such as target flow at operating pressure, not flow alone. For this guide, the initial target is 2.20 L/min, but I would also specify whether this is required continuously, during a dosing event, or only under a particular system condition. I also identify whether pressure pulses or blocked outlets are possible.
I check the power supply, motor type, speed control, mounting dimensions, ports, tubing, and communication requirements. A pump that fits the hydraulic specification may still be unsuitable if the motor cannot connect to the buyer’s control architecture. For OEM projects, I also confirm drawing requirements, sample availability, packaging, labeling, and documentation.
Pricing for a micro magnetic gear pump depends on pump materials, motor configuration, control electronics, connection style, order quantity, customization, and testing requirements. I do not use a single public price as a reliable basis for a B2B project because the final configuration may differ substantially. A professional quotation should identify the selected pump, motor, accessories, quantity, and commercial assumptions.
MOQ and lead time can also vary between standard products and customized OEM versions. Before approving a supplier, I ask about sample availability, pilot quantities, production capacity, replacement parts, packaging, and repeat-order consistency. These details are important when a pump will be integrated into a machine that requires continuing supply rather than a one-time purchase.
At Suofu, I support B2B buyers by reviewing the operating point before recommending a configuration. We can discuss the target flow, pressure, fluid, motor requirements, connection method, installation space, and expected purchasing volume. This approach helps reduce the risk of selecting a pump that meets a headline flow number but does not fit the complete equipment design.
The most common mistake I see is choosing the pump from flow rate alone. Other frequent errors include ignoring viscosity, using incompatible tubing, overlooking inlet restrictions, and assuming that magnetic coupling eliminates all maintenance or compatibility concerns. I also recommend avoiding operation outside the confirmed pressure, temperature, speed, and fluid limits.
To optimize the design, I keep the inlet line as suitable and unrestricted as possible, minimize unnecessary bends, confirm that the pump is properly primed when required, and verify the actual flow during prototype testing. I record the fluid, temperature, pressure, motor speed, and measured flow so that the production specification is repeatable. Any change in fluid formulation or system resistance should trigger a new evaluation.
The right 2.20 L/min micro magnetic gear pump is selected by matching the required flow with pressure, fluid properties, materials, motor control, and installation conditions. I recommend preparing a short application sheet before requesting quotations. Include the target flow of 2.20 L/min, operating pressure, fluid details, temperature range, duty cycle, voltage, connection requirements, dimensions, and expected quantity.
Send these details to Suofu for a configuration review, drawing discussion, sample planning, and commercial quotation. I can then help compare standard and customized options while keeping the selection focused on actual operating conditions and long-term B2B supply needs.
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