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CHAPTER
2
Overview
The Raven AccuFlow™ systems are designed to provide continuous and automatic control of anhydrous
ammonia (NH
) applications via a Raven serial or CAN control system. The rate of application is monitored via
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a flow meter and controlled by the Raven console and control valve(s). The operator sets the target application
rate in the Raven control console and the system automatically adjusts for vehicle speed and section status
changes.
Note:
To properly measure and control application, anhydrous ammonia must be in a liquid state when it
passes through the flow meter. To remain liquid, anhydrous ammonia must be stored at a
temperature of -28° F [-33° C] or kept under pressure at higher temperatures. To help ensure that
the ammonia is in a liquid state as it passes through the flow meter the AccuFlow super cooler
uses a small amount of anhydrous ammonia from the nurse tank to reduce the temperature of the
ammonia being applied.
The Raven AccuFlow system is available in two configurations to match the NH
•
Standard AccuFlow™
•
High Performance (HP) AccuFlow™
Standard AccuFlow
The standard AccuFlow system is available in one or two valve configurations with single or dual coolers. The
standard AccuFlow system is capable of applying anhydrous ammonia at rates up to 30 gallons per minute
[113 liters per minute] with a single cooler system, or 45 gallons per minute [170 liters per minute] with a dual
cooler system.
Note:
System capacity will vary based upon ambient conditions. Contact a local Raven dealer for more
information.
AccuFlow HP
The AccuFlow HP system uses a boost pump to increase the pressure of the anhydrous ammonia in the
application lines which allows the HP system to apply anhydrous ammonia in colder ambient temperatures and
increased speeds. The AccuFlow HP system is also available in one or two valve configurations with dual
coolers.
Manual No. 016-0171-496 Rev. C
I ntroduction
C h a p t e r 2
application needs:
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