GRANDEMAC
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How the Air-Blast Sprayer Works |
The FQS orchard sprayer combines liquid pressure with high-volume airflow.
During operation, the tractor PTO provides power to the spraying system. The diaphragm pump draws spray liquid from the main chemical tank and supplies it to the nozzle system under pressure. The double-head cone nozzles atomize the liquid into fine spray droplets.
At the same time, the axial fan generates a strong air stream behind the sprayer. Instead of relying only on liquid pressure to carry droplets toward the trees, the airflow transports the spray mist into the fruit-tree canopy.
This air-assisted process is particularly useful in orchards because fruit trees have multiple layers of leaves, branches and growing shoots. Spray directed only at the outer canopy may not easily reach internal foliage. The air-blast fan helps move droplets between branches and through different canopy layers.
The three FQS models use different fan diameters and airflow capacities, allowing the spraying system to be matched to different tree structures.
FQS6A/600 uses a 600mm fan with 12,300 m³/h airflow. FQS7/1000A increases the fan diameter to 700mm and airflow to 15,800 m³/h. The larger FQS8/1000A uses an 800mm fan with 25,400 m³/h airflow.
After spraying, the separate circuit-washing tank can provide clean water for flushing residual chemical solution from the pump, pipelines and nozzles before the machine is stored or prepared for the next application.
Main Components |
The chemical tank stores the pesticide or other spraying solution used during orchard operation.
The FQS6A/600 is equipped with a 600L main tank, while the FQS7/1000A and FQS8/1000A use 1000L tanks.
A smaller tank reduces overall machine size and is more suitable for smaller tractors and orchard blocks. A 1000L tank provides longer operation between refills for larger commercial orchards.
Each FQS model uses a diaphragm pump selected according to the capacity of the machine.
FQS6A/600: GMB81, 78 L/min
FQS7/1000A: GMB130, 125 L/min
FQS8/1000A: GMB150, 140 L/min
All three pumps have a listed working pressure of 40 bar.
The pump provides continuous liquid delivery from the tank to the spraying system. Increasing pump capacity across the three models corresponds with the larger tank, fan and nozzle configurations.
The axial fan generates the airflow required to carry spray droplets into fruit-tree canopies.
Three fan configurations are available:
600mm / 12,300 m³/h
700mm / 15,800 m³/h
800mm / 25,400 m³/h
The required airflow depends on tree size and canopy density. Smaller fruit trees may not require the largest fan, while taller and more developed canopies can benefit from a higher-volume airflow configuration.
The spraying system uses double-head non-drip cone nozzles.
Available rotatable orifice sizes are 1.2mm and 1.5mm.
FQS6A/600 and FQS7/1000A are equipped with 10 nozzles, while FQS8/1000A uses 12 nozzles.
The cone spray pattern helps atomize liquid for orchard spraying, while the non-drip construction is intended to reduce residual liquid dripping when spraying stops.
A separate washing tank is included for flushing the spraying circuit after operation.
Clean water can be circulated through the pump, pipelines and nozzles to remove residual spray solution.
This is useful when changing chemicals, completing the day's spraying work or preparing the machine for storage.
The sprayer also includes a separate hand-washing water tank.
This provides operators with an independent clean-water source during field spraying work rather than using water from the chemical tank.
Features & Advantages |
The FQS series is pulled behind the tractor rather than being fully supported by a three-point hitch.
This makes the design suitable for the relatively large 600L and 1000L tanks used in the series.
The sprayer chassis supports the machine and liquid load while the tractor provides towing and PTO power.
No separate engine is required for the spraying system.
The tractor PTO supplies the working power, allowing the sprayer to operate as part of the farm's existing tractor equipment system.
The FQS6A/600 requires at least 15HP, while the two 1000L models require tractors of at least 35HP.
The air-blast fan provides airflow from 12,300 to 25,400 m³/h depending on model.
This gives growers several airflow levels rather than a single fixed fan specification.
For larger or denser fruit trees, the FQS8/1000A provides the strongest air-blast configuration in the series.
Spray pressure can be adjusted from 0 to 4.0 MPa.
This allows the operator to configure spraying according to the selected nozzle, tree canopy and actual working requirements instead of using one fixed pressure for every application.
The listed spraying range is at least 10 meters for all three models.
Combined with the high-volume fan, this provides the reach required for typical fruit-tree spraying operations.
Residual liquid loss can occur when conventional nozzles continue dripping after the control system is shut off.
The double-head nozzles used on the FQS series have a non-drip design intended to reduce this unnecessary discharge.
The FQS series provides two main tank sizes rather than one standardized capacity.
The 600L configuration is suited to smaller orchard operations and lower-horsepower tractors.
The 1000L configurations allow larger areas to be sprayed between refilling stops, making them more appropriate for commercial fruit farms and longer daily spraying schedules.
The combination of a main chemical tank, circuit-washing tank and hand-washing tank makes the equipment more practical for repeated field use.
The operator can clean the liquid circuit after spraying without depending entirely on an external water source at the orchard.
