Seed Hawk GRANULAR AND LIQUID TANKS 2009 - Manual (Page 30)

Seed Hawk Manual Granular and Liquid Tanks Page 28
5.2 SYSTEM FLOW DESCRIPTION
The metering pump, ground driven by the metering wheel, draws liquid fertilizer
first through the flow valve, then the main filter. The liquid fertilizer is then
pumped to the distribution system. A gauge indicates the operating pressure.
Select the appropriate size orifice to adjust the liquid fertilizer delivery pressure.
The restriction created by the orifice sets the amount of back pressure required
for even distribution of liquid fertilizer to each opener. Too low pressure will result
in poor liquid distribution and excessive pressure can damage the pump, hoses,
fittings and/or drives.
IMPORTANT: Operating pressure can not be used as a
means of system calibration as system pressure has no
direct correlation to the quantity of product applied.
Even distribution of liquid fertilizer requires that the operating
pressure be set in the recommended range.