YAMADA NDP-P20 Series, Operation Manual

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6. Method of cleaning
WARNING
•Before starting operation, make sure that compressed air is not supplied to the pump.
•Before starting operation, make sure that the pump is not pressurized.
1) Remove the hose from the suction side of the pump.
2) Close the flow valve on the discharge side, open the drain valve, and then operate a pump by starting
air pressure for a while to discharge any fluid remaining inside the pump as much as possible.
3) Remove the hose from the discharge side, and attach different hoses to the suction side and the
discharge side for cleaning.
4) Be ready with a vessel with cleaning solution, select cleaning solution appropriate for the type of fluid
pumped, and then connect the suction-side and the discharge-side hoses of the pump.
5) Operate a pump by starting air pressure slowly, and let the cleaning solution circulate for sufficient
cleaning.
6) Finally, flush with clean water.
7) Remove the hose from the suction side of the pump, run the pump for a while and purge the pump of
remaining fluid as much as possible.
CAUTION
• Be careful when removing piping. Fluid will gush out.
• After cleaning with clean water, turn the pump upside-down to drain out the water.