Operation - Pentair HYPRO HM1C Product Bulletin

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.
Hooking Up the Hydraulic Motor to the
Tractor Hydraulic System
Hypro Series 9300HMC hydraulic motor-driven pumps can
be mounted on either the tractor or sprayer. When hooking
up, make sure that no dirt or liquid gets into the hydraulic
motor. Keep all hydraulic connections clean. Be sure to
connect the hydraulic motor into the system correctly by
Open Center Systems— All Models
Adjusting Centrifugal Pump Output
HM1C, HM3C & HM5C motors have bypass screw fully
closed from the factory. HM2C & HM4C motors have
bypass screw set at 1-1/2 turns from fully closed from the
factory.
1. Open the bypass adjustment screw 2-1/2 turns from
fully closed. Turn the bypass screw in to achieve the
flow for the desired gpm and psi.
2. Start the tractor. Leave the directional valve in the
neutral position and allow hydraulic oil to circulate for
approximately 10 to 15 minutes or until adequately
warmed.
Plumbing Installation
putting the pressure line to the Pressure Port Adapter and
return line to the Tank Port Adapter. The adapters on the
hydraulic motor are sized to accommodate 1/2" NPT fittings
on the pressure port and 3/4" NPT on the tank port. For
maximum performance, the hydraulic lines should also be at
least 1/2" [12.7 mm] in size for the pressure line and 3/4"
[19.05 mm] for the tank line.
The tank (OUT) port adapter with a built-in check valve
assembly will guard against reverse operation — allowing
you to reverse oil flow to operate other equipment. This
adapter must not be removed. On HM2C and HM4C
model pumps, the pressure (IN) port adapter is a two-piece
assembly consisting of an open (unrestricted) adapter with
three orifices packed loose with the pump. (See the
Operations Section.)
When using the HM2C or HM4C unit on any flow-
compensated (load sensing) closed center system, or any
small open center system with a maximum flow of 8 gpm
[30.28 lpm] for HM2C or 10 gpm [37.85 lpm] for HM4C, the
metering orifice should be removed from the pressure port
adapter. When using these units on flow-compensated
systems, connect to the motor priority circuit if your tractor has
one.
Standard spool valves, which are found on all tractor
hydraulic systems, may cause potentially damaging high
peak pressures in the hydraulic system when closed
because of abrupt shut-off of oil flow in both the supply and
return lines. When shutting off the pump, move the selector
to the FLOAT position to allow the centrifugal pump to come
to a stop gradually.

Operation

3. Prime the centrifugal pump with all valves open (See
the Installation Instructions and System Configuration
Diagram).
4. Close the agitation line valve and keep the control valve
and the boom shut-off valve open. Note the spray
pressure.
5. Open the agitation line valve until you have desired
circulation in the tank. Recheck the spray pressure. If it
is too low, close down the agitation line valve until the
desired spray pressure is reached. If the spray pressure
is too high, throttle the centrifugal pump by closing down
the control valve.
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For further information
regarding Hypro products,
contact your local dealer or
Hypro directly at
www.hypropumps.com or by
calling 1-800-424-9776.