- 7-
Plumbing Installation
Pump Installation:
The following are recommendations to achieve the
optimal performance out of your centrifugal pump and
your spraying system.
Pump Inlet Line
To achieve full capacity from the pump, the inlet line
should be at least the same size as the inlet port on the
pump. Reducing this line size will restrict the capabilities
of the pump. The line must also be free of air leaks.
Check all fittings and connections in the suction line for
tightness. The introduction of air may affect the priming
and pumping capabilities of the pump. Use good quality
suction hose that will not be collapsed by suction.
For non Self-Priming models, the centrifugal pump
should be mounted below the liquid level and as near to
the liquid source as possible to allow for the shortest
suction line practical. To achieve optimal performance,
the suction line should slope down into the pump. Avoid
rises and humps that could trap air in the line to the
pump. The suction line and pump should be filled with
liquid prior to starting the pump and all discharge lines
should be open.
Priming:
IMPORTANT: PUMP MUST NOT BE RUN DRY.
In addition to the proper suction plumbing, a vent line
should be installed to assist in priming. Use a Hypro
Vent Line Kit 3430-0456. The vent line will help to
prevent air locks and allows air to bleed off to the tank.
This helps ensure proper priming and helps to prevent
dry-run damage to the mechanical seal during priming.
The vent line should be installed in the top port of the
pump casing and the line routed sloping upward to the
tank, where it should be mounted above the liquid line.
Pump Outlet Line
The recommended orientation for the outlet port is
pointing straight up. This allows liquid to stay in the
pump while it is priming. The outlet line should be the
same size as the pressure port on the pump to give the
optimal flow. The line should have as few restrictions
and elbows as possible to optimize the pump
performance and reduce pressure drop from the pump
to the spray tips.
Centrifugal Pump Control
Hypro now offers many different components for
spraying systems. The Hypro centrifugal pump control
incorporates the electric flow control valve, a self-
cleaning line strainer, a visual pressure gauge and a
manual agitation control valve.
Flow Control Valve
A high-flow electric proportional valve allows for
maximum flow control to the boom valves. It provides
smooth, rapid control that can be controlled from either
an electronic rate controller or switch box.
Strainers
The recommended placement of the strainer for a
centrifugal pump is in the pump outlet line. This will
eliminate any possible restriction that the strainer could
create if it were installed in the inlet line. Ensure that the
proper strainer size and screen mesh are used to limit
the pressure drop and achieve the best filtration. Line
strainers can also be installed in the tank fill line to filter
liquid as it is loaded into the tank as well as in the boom
lines to further filter the solution prior to the spray tips.
Tank baskets can also be used to filter material added
through the tank lid.
Agitation
The centrifugal pump control contains a manual agitation
control valve that can be adjusted to provide the right
amount of flow to the jet agitators in the tank to ensure
proper mixing within the tank.
Flowmeter
To eliminate the mechanical problems of a turbine
flowmeter, we recommend that an electromagnetic
flowmeter be used. These flowmeters have no moving
parts to wear out and will provide a more consistent
and accurate flow reading. They can be input into just
about any electronic rate controller or switch box.
Boom Section Valves
For rapid response and reliability, we recommend
electric plunger valves be used for boom control.
The valves should be sized accordingly to minimize
the pressure drop and maximize the flow rate.
The boom tubing or hose should be sized accordingly
to ensure that a pressure drop in the lines does not
occur, causing inconsistent pressures at the nozzles.
Nozzle Bodies
Nozzle bodies with shut-off check valves are
recommended to eliminate dripping from the spray tips
when the boom valves are shut down.
For further information
regarding Hypro products,
contact your local dealer
or Hypro directly at
www.hypropumps.com or by
calling 1-800-424-9776.
SG_300AG_213_RevB.qxp:AG_300AG_09_03 2/21/13 8:33 AM Page 7
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