Apply With Low Application Rates

When apply with low application rates, it may be necessary to turn orifice valve (A) to the closed (low) position.

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Valve in Closed (Low) Position

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A - Orifice Valve

B - Solution Flow

To determine when to close orifice valve, calculate boom flow rate. When solution flow rate is 100 L/min (26 gal/min) or less, close the orifice valve. If solution flow rate is greater that 100 L/min (26 gal/min) open orifice valve all the way.

Determining Solution Flow Rate:

When spraying, go to Sprayer Main Page and check solution flow rate (B) if that feature has been selected on one of the dropdown menus available on that page. If solution flow rate is 100 L/min (26 gal/min) or less, close the orifice valve. If solution flow rate is greater than 100 L/min (26 gal/min), open orifice valve all the way.

Find the solution flow rate using formula:

Liters per minute =	Liters per hectare X kilometer per hour X nozzle spacing (m)	X total number of nozzles
	600

Example: If there are 42 nozzles on the spray boom in an application of 150 L /ha and 20 km/h: (150 L/ha x 20 km/h x 0.508 m) / 600 x 42 = 106.6 L/min. (solution flow rate).

Operator would open orifice valve.