Why Bottle-Drying Air Knives Strip Water Before Labelling
Blower-fed air knives turn a supplied pressure into directed jets that move water films and droplets off a bottle. Drying the label zone also requires attention to shoulders, caps, drainage and the time available on the conveyor.
Follow the airflow through the equipment
Supply the air knife
A centrifugal blower supplies the distribution plenum through the designed filter and hose system.
Form the jet
Air accelerates through the slot and approaches the bottle at the selected angle and stand-off.
Displace the water
The jet applies force along the surface and drives water toward an exit. Directed nozzles can reach areas shadowed from the main side knives.
Collect the displaced liquid
The treatment zone must collect and drain removed water without splashing it back onto containers or downstream equipment.
What the fan contributes
- Supplies the flow and pressure used by the slots and nozzles.
- Overcomes delivery-hose, manifold and filter resistance.
- Supports the selected treatment condition at the planned line rate.
What interrupts the intended process
- A shadowed recess retains water although the visible sidewall is dry.
- Excessive stand-off or unsuitable angle weakens useful force at the target.
- Poor water collection allows rewetting of already treated bottles.
Prepare the operating conditions
Share your layout and the operating information below. If a value is still unknown, identify it so the next measurement can be agreed before a model is selected.
Match the fan to this air path
Ask LONGWELL to evaluate an appropriate industrial centrifugal construction against the measured or specified air-knife duty. Confirm the required pressure at the manifold, not merely the fan free-air volume. The system layout and treatment test determine whether the selected design is useful for the bottle.
Where it sits
Feeding the air-knife plenum through the specified filter and hoses, outside the wet treatment zone where designed.
Why consider this configuration
The blower must supply useful pressure at slots and targeted nozzles; bottle geometry and speed determine the duty.
Check performance in the assembled equipment
Match the blower to the bottle
Share the bottle, line rate and nozzle duty with LONGWELL to evaluate an appropriate fan design.
Start with your layout and the requirements you already know. Confirm the selected configuration in the complete equipment.