To select a micro magnetic gear pump for a required flow of 2.20 L/min, I recommend starting with the complete operating point rather than flow alone. The pump, motor, wetted materials, fluid viscosity, required pressure, temperature, control method, and duty cycle must all be matched to the application. A 2.20 L/min target is equivalent to 132 L/h or approximately 36.7 mL/s, but the pump must still be evaluated at the actual pressure and fluid conditions. At Suofu, I help B2B buyers confirm these parameters before selecting a miniature magnetic gear pump configuration.
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This guide is intended for engineers, OEM purchasing teams, system integrators, and distributors sourcing a compact pump for a controlled liquid delivery requirement. It is particularly useful when the application needs a small footprint, repeatable metering, low leakage risk, or separation between the motor drive and the pumped liquid. Typical projects may include laboratory equipment, analytical instruments, compact cooling systems, chemical dosing units, printing equipment, and automated process assemblies.
The guide is also suitable for buyers comparing standard and customized micro pump options. It does not replace application testing, because the same nominal flow can produce different results when fluid viscosity, pressure, temperature, or tubing dimensions change. I recommend using the information below to prepare a precise technical inquiry and then confirming the final selection with supplier data.
A micro magnetic gear pump transfers liquid through the controlled rotation of meshing gears. In a magnetic-drive design, the motor torque is transferred to the internal pumping assembly through a magnetic coupling, which can help separate the drive section from the wetted chamber. This construction may be valuable when the application requires a compact sealed pumping arrangement, although the actual leakage performance depends on the design, materials, assembly, and operating conditions.
Gear pumps are positive-displacement pumps, so their theoretical displacement is related to gear geometry and rotational speed. In practice, delivered flow can be affected by internal clearances, fluid viscosity, pressure differential, motor speed, temperature, and wear. For this reason, I treat 2.20 L/min as a required operating point that must be verified under application conditions, not as a sufficient specification by itself.
| Specification | Why It Matters | Information to Request |
|---|---|---|
| Flow rate | Confirms whether the pump can deliver the required output at the working pressure. | Flow curve or test point at 2.20 L/min |
| Pressure differential | Higher pressure can reduce actual flow and increase motor load. | Operating pressure, maximum pressure, and relief requirements |
| Fluid properties | Viscosity and chemical composition influence efficiency, compatibility, and service life. | Fluid name, viscosity, temperature, and solids content |
| Motor and control | Speed control determines how the pump is started, adjusted, and integrated. | Voltage, current, speed range, signal type, and duty cycle |
| Materials | Wetted components must resist the pumped liquid and operating temperature. | Material list for housing, gears, shaft, seals, and connectors |
First, identify whether 2.20 L/min is a continuous flow requirement, a nominal target, or a short-duration maximum. Then specify the inlet condition, outlet pressure, tubing size, elevation difference, and any valves or filters in the circuit. A pump that reaches 2.20 L/min at low resistance may not reach the same flow when the system creates a higher pressure differential.
I also recommend recording the acceptable flow tolerance. For example, a dosing system may require a narrow repeatability range, while a cooling loop may accept a wider variation. The required tolerance affects motor control, calibration, pump sizing, and the need for feedback or a flow sensor.
Provide the supplier with the exact liquid or, when confidentiality applies, its relevant technical properties. At minimum, include viscosity, temperature range, chemical concentration, vapor pressure if relevant, and whether the fluid contains particles or gas. A compatibility decision based only on the fluid’s common name can be incomplete because concentration and temperature may change material behavior.
For relatively clean, low- to medium-viscosity liquids, a compact gear pump may be appropriate. Fluids containing abrasive solids, large particles, or substantial entrained gas require additional review because they may affect gear clearances, wear, priming, and flow stability. I advise buyers to request a wetted-material list and review it with their fluid supplier or engineering team before approval.
The motor should be selected according to the required flow, pressure, start-up torque, operating duration, and available power supply. Common considerations include DC voltage, brushless or brushed construction, speed control, feedback, connector type, and installation orientation. If the system needs variable flow, confirm whether the pump supports voltage control, PWM, communication control, or another defined input method.
The electrical specification should also include the available supply tolerance and the controller’s current capacity. Starting current may differ from running current, and the actual requirement depends on the motor and load. I recommend requesting an electrical drawing or interface definition instead of assuming that a mechanically similar pump will use the same control method.
Check the pump envelope, mounting holes, inlet and outlet location, port standard, tubing connection, shaft orientation, and service access. Small systems often have limited space, so a pump that meets the flow requirement may still be unsuitable if the ports or connector interfere with surrounding components. Confirm whether the pump is intended for continuous operation, intermittent operation, or a specified duty cycle.
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System layout also affects performance. Shorter suction lines, fewer sharp restrictions, and an adequately sized inlet can help reduce avoidable suction losses. If the pump is not self-priming under the intended conditions, the equipment design may need a flooded inlet, pre-filling procedure, or another priming arrangement.
Micro magnetic gear pumps can be configured with different gear materials, housing materials, shaft arrangements, motor options, and port styles. The appropriate combination depends on fluid compatibility, pressure, temperature, cleanliness, and expected operating hours. A compact configuration may support easy integration, while a more specialized configuration may be necessary for aggressive fluids or demanding temperature conditions.
When comparing options, I suggest separating confirmed standard features from project-specific customization. A supplier may offer a standard pump body but customize the motor, connector, port, control input, or mounting arrangement. These changes can influence validation requirements, minimum order quantity, tooling, and production timing.
Ask whether the quoted 2.20 L/min is a measured value, a nominal rating, or a maximum value. Also ask at which pressure, viscosity, temperature, and rotational speed the value was obtained. A transparent supplier should be able to explain the test conditions or identify which values require application confirmation.
Gear pumps can provide controlled displacement, but the system may still experience flow variation caused by speed changes, pressure changes, fluid properties, or trapped air. Ask how the pump behaves at the required pressure and whether the system needs a pressure relief device, bypass path, accumulator, or flow-control component. The correct protection method depends on the pump design and the complete circuit.
For OEM applications, evaluate expected operating hours, start-stop frequency, fluid cleanliness, operating temperature, and access for replacement. A pump’s service life cannot be inferred from flow rate alone. I recommend discussing validation samples, inspection items, packaging, spare-unit planning, and change-control procedures before volume purchasing.
The price of a 2.20 L/min micro magnetic gear pump depends on the pump head, motor, materials, controls, connector, testing requirements, order quantity, and customization level. Because these factors vary significantly, I do not recommend comparing unit prices without comparing the complete specification. A lower initial price may not represent the lower total sourcing cost if additional adapters, controllers, testing, or redesign work are required.
MOQ and lead time are also project-specific. Standard configurations may follow a different production schedule from customized versions involving new tooling, special materials, or dedicated electrical interfaces. When requesting a quotation, provide the estimated annual demand, trial quantity, target production date, destination, and required documentation so the supplier can return a more useful commercial proposal.
The most common mistake is choosing a pump from the flow number alone. Buyers should not ignore pressure differential, viscosity, temperature, inlet conditions, or the motor controller. Another mistake is using a material recommendation without confirming the actual fluid concentration and operating temperature.
It is also risky to finalize a pump before checking the system’s suction conditions and control interface. A pump may be mechanically compatible but electrically difficult to integrate, or it may meet the nominal flow while failing to maintain the desired output under system resistance. I recommend testing a representative sample with the actual fluid and a circuit that reflects the production design.
For a 2.20 L/min requirement, the right micro magnetic gear pump is the one that achieves the required flow at the real pressure, fluid, temperature, control, and duty-cycle conditions. The target equals 132 L/h, but that conversion alone cannot confirm pump suitability. A complete selection should include the operating point, wetted materials, motor interface, mechanical dimensions, protection strategy, and validation plan.
At Suofu, I can help B2B buyers organize these requirements into a practical pump specification for quotation and sample evaluation. When contacting us, please provide the target flow, pressure, fluid, viscosity, temperature, voltage, operating schedule, port requirements, and estimated quantity. With this information, we can review a suitable micro magnetic gear pump configuration, identify any technical risks, and clarify the next steps for sampling or production sourcing.
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