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Operation
10
3A4586E
Operation
1.
Use closed top drum or other cover to prevent pos-
sible contamination.
2.
Once the pump is fully cleaned, assembled, and all
connections are securely fastened, insert the pump
into the drum or tank.
3.
It is recommended to attach a suitable hose or pipe
to the pump discharge.
4.
If you opt to use a hose:
a.
Ensure that the hose meets the pump discharge
pressure requirements. It is recommended to
use a hose that is rated 4x the pump discharge
pressure.
b.
Fasten the hose to the hose barb with a suitable
hose clamp that exceeds the pump discharge
pressure. A hose barb fitting kit, part 25C502, is
available from your Graco distributor.
5.
Variable speed pumps should be started at approxi-
mately half speed according to the dial settings.
Turn the motor to the ON position. Throttle flow to
desired output pressure by varying the potentiome-
ter (motors 17N666 and 17N667) or VFD frequency,
if applicable on motor 17N668.
6.
After use, flush and clean the pump. Then store the
pump vertically.
•
Moving parts can pinch, cut or amputate fingers
and other body parts. Keep your hands and fingers
away from the mechanical seal viewing window on
models 25C422 or 25C782 during operation and
whenever the pump is connected to a power
source. Disconnect power before moving.
•
Do not use these pumps for the transfer of
flammable or combustible products or in an
environment where flammable or combustible
fumes are present.
•
Do not clean or flush the pump with flammable or
combustible fluids.
•
Progressive cavity pumps are positive displace-
ment pumps and should never be operated
against shut-off elements such as nozzles, valves,
etc. Failure to comply may result in excessive
pressure build resulting in serious injury and pump
damage.
NOTICE
•
Never allow the pump to run dry of fluid. A dry
pump will possibly damage itself.
•
Progressive cavity pumps 25C420, 25C421,
25C780, and 25C781 are recommended for inter-
mittent duty use only to prevent premature motor
wear. (i.e., 30 minute intervals with a 10 minute
cooling off period). For continuous duty applica-
tions, Graco recommends using models 25C422 or
25C782.