Seed Hawk GRANULAR AND LIQUID TANKS 2008 - Manual (Page 36)

LIQUID SYSTEM OPERATION
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.
Very 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.