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John Deere offers three levels of regulation systems for application rate control:
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Constant Pressure System.
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Constant Volume System.
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Automatic Rate Control.
1. Constant Pressure System
Pressure is controlled by a large diaphragm electric pressure regulator that ensures a stable, constant pressure. Constant pressure ensures that the desired spray quality is maintained under different circumstances. This improves control of crop coverage and drift.
2. Constant Volume System
The constant volume system has a volumetric flow-control valve that distributes pump flow in constant relation between the boom and return line to the tank. Since the flow rate (L/min) is proportional with the engine's rpm, tractor speed can be changed (within certain limits) within one gear without affecting application rate (L/ha).
3. Automatic Rate Control
With automatic rate control the flow rate (l/min) is proportional to the real tractor speed, resulting in a constant application rate (L/ha), even at varying speeds when changing gears. Simply enter the desired application rate and nozzle type into the controller (EL-4 or GreenStar) and start spraying.
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Self-priming piston-diaphragm pumps offer long life and dependable performance, even at higher pressures. Pumps are available with 160 L/min (4 cylinder), or 250 L/min (6 cylinder).
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Master and boom section valves can be electrically operated from the cab. Start/stop of individual boom sections is completed in 0.25 seconds to help conserve chemicals and reduce overlap or missed areas.
*Specifications and design subject to change without notice.
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