Shutdown; Method Of Cleaning - Dellmeco DM 80/800 Instruction Manual

9.3. Shutdown

Close the air valve of the pump and shut off the supply air.
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The pump can be shut down with the flow valve closed while air is being supplied. However DO NOT leave
the pump in this condition for many hours without supervision - there is a risk of a leak from the pump or
piping, and fluid may continue flowing out of the position of leakage.
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When the pump is shut down while pumping slurry, particulate matter contained in the slurry will be
deposited and get stuck inside the out chamber. Therefore after finishing work the pump must be purged of
the remaining fluid. Otherwise when starting the pump again, the diaphragm may get damaged and the
centre rod may bend.
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Keep a vessel below the relief valve for any drain off.
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Be careful! - Fluid under pressure will gush out the moment you open the valve.
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If the pump is unused for a prolonged period, purge and clean it.

10. Method of cleaning

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Make sure that compressed air is not supplied to the pump BEFORE you start cleaning the pump.
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Make sure that the pump is not pressurized BEFORE you start cleaning the pump.
1) Remove the hose from the suction side of the pump.
2) Close the flow valve on the discharge side and open the drain valve. Then start air pressure
for a while to discharge possibly much fluid remaining inside the pump.
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, the kind appropriate for the type of fluid
pumped. Next connect the suction-side and the discharge-side hoses of the pump.
5) Start the pump air pressure slowly, and let the cleaning solution circulate for sufficient
cleaning.
6) Flush with clean water.
7) Remove the hose from the suction side of the pump, run the pump for a while to purge the
pump of remaining fluid as much as possible.
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CAUTION
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CAUTION
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WARNING
19I DELLMECO I AODD DIAPHRAGM PUMPS