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565 Trailer Sprayer - Operation Instructions
Section B
4
Section B
Centrifugal Pump
Pump operation is very important. The following must be
followed when operating a centrifugal pump. Proper
pump operation will make your system operate with mini-
mal maintenance and down time. Failure to follow the
manufacturer’s pump operation instructions will void
the pump warranty.
The pump must never be run in a non-flooded condition.
Operating the pump in a non-flooded condition will cause
extensive seal damage and possible pump damage. To
verify the pump is flooded, visually check pump vent line
for fluid, fluid will appear in vent line when pump is
flooded.
A “flooded” condition is when the centrifugal pump is
completely full of fluid and no pockets of air are present
in the pump. In order to get maximum pump efficiency
the mounting and plumbing must meet the guidelines
stated below.
1. The pump inlet must be mounted below the product
tank(s) sump to allow gravity to naturally fill the
pump with liquid. See Figures 1 - 3.
2. The suction line must have a continual rise from the
pump inlet to the tank sump.
3. The pump must have the vent line plumbed to it.
Hydraulically Driven Centrifugal Pump: It is very
important that the proper oil flow is supplied to the
hydraulic motor which powers the pump. Excessive flow
will over-speed the motor and cause motor damage. To
regulate the correct oil flow to the pump motor see
the pump manufacturer’s manual.
IMPORT
ANT
The vent line is designed to prevent air lock by bleeding off
trapped air. This allows the pump to prime and keeps some
fresh solution circulating by the seal.
IMPORT
ANT
For proper venting, the vent line must continually rise from the
pump to the top of the tank. A small amount of solution will
move through this line back to the solution tank indicating a
primed pump.
Product Tank
Vent
Line
Suction Line
Ideal
Pump
Figure 1
Product Tank
Vent
Line
Suction Line
Acceptable
Pump
Figure 2
Product Tank
Vent
Line
Air Trap Point
Pump
Figure 3
Suction Line
Not Acceptable
Hydraulically Driven
Centrifugal Pump
Outlet
Suction
Line