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What Pressure and Airflow Data Should You Collect for an Air-Knife Blower?
Collect the measured air-knife duty, pressure locations, operating modes and test conditions a supplier needs before recommending a blower.
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Collect the measured air-knife duty, pressure locations, operating modes and test conditions a supplier needs before recommending a blower.
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Replacing a 4.0 kW ring blower with a 1.5 kW unit is possible only when strong evidence shows that the old machine has substantial unused capacity. The power-class gap is large enough that a buyer should treat TW1500B as one candidate, not as the default energy-saving replacement.
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A side channel blower should be replaced when the combined risk of failure, process loss, energy waste and repair delay exceeds the risk and installed cost of a planned retrofit. Age alone is not enough. A well-maintained older blower may remain serviceable, while a newer but misapplied unit may deserve early replacement.
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The best blower for an air knife is not always the model with the highest pressure, the largest airflow or the biggest motor. It is the blower that supplies the required air to every active knife, at the installed resistance, while meeting the line’s drying or blow-off target with reasonable energy use and service risk.
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Verify downstream dryness after a packaging-format change by checking incoming water, product geometry, air-knife settings, line rate and the approved result.
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A PCB drying blower is easy to underestimate. The unit may look like a small component beside the washer, but its output influences water carryover, board stability, conveyor speed and the condition of the next process. If it is selected from motor power alone, the line may consume less electricity yet leave droplets around holes, edges and fixtures. If it is oversized, the machine may waste power and create unnecessary noise without improving the accepted product.
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A 1.5 kW Towwind blower may replace a 3.0 kW ring blower when the old unit is materially oversized for the installed duty. The larger rating gap makes proof important: the project should identify where the old capacity is being lost, throttled or left unused before proposing TW1500B.
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The honest answer is site-specific. A factory should calculate its business case from measured kW or accumulated kWh, actual operating hours and equivalent accepted process output.
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Trace residual water on plated parts by its location and timing, then check part geometry, nozzle reach, drainage and mist before changing blower settings.
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Reducing PCB drying energy begins with one rule: preserve the accepted dry-board result. Lowering blower output is not a saving if it leaves moisture in holes, slows the conveyor or increases rework.