To start with: the flow rate of a micro pump decreases as pressure rises. Do not match the no-load flow rate and maximum pressure independently. The intersection of the pump’s PQ curve and the system resistance curve is the actual operating point.

Define working requirements: calculate the target flow rate and the total differential pressure, including lift height, pipeline friction loss, back pressure from elbows, valves, filter membranes and nozzles. Fluid viscosity and temperature shall also be considered.

Check the PQ curve: verify whether the flow rate corresponding to the target differential pressure on the curve meets requirements. Prioritize the high-efficiency range and avoid the zone near the shut-off pressure to prevent unstable flow and excessive heat generation.

Set aside allowance: generally reserve 20%–30% pressure allowance to cope with filter clogging, voltage fluctuation and pipeline aging. Excessive allowance is not recommended, otherwise the pump will operate far from its high-efficiency zone for long periods, leading to higher power consumption and noise.

Fluid and structural adaptation: resistance rises sharply for high-viscosity or gas-containing fluids. Enlarge pipe inner diameter and reduce sharp bends if needed. For gas pumps, pay attention to negative pressure and leakage.

Prototype test verification: theoretical calculations have deviations. Build a complete circuit to measure flow and pressure, then adjust pump model, piping or add pressure/flow regulating structures.

Core principle: matching refers to operating point matching, not a simple combination of maximum parameters.