Dellmeco DME 15 R Series, Instruction Manual

Page: 31 / 66

31I DELLMECO I EODD DIAPHRAGM PUMPS
7.1. Pump capacity regulation
It can be realized only by means of the frequency converter (optional equipment). After running the electric
motor, pump without frequency converter works with maximum capacity.
7.2. Shutdown
Cut off electrical motor power supply. DME Pump will be shut down immediately.
!
CAUTION
!
CAUTION
!
CAUTION

The permissible suction flow speed can vary depending upon the viscosity and specific gravity of the fluid,
the suction stroke and other factors.

If fluid is not discharged after you start the pump, or if you hear an abnormal noise or notice any
irregularity, shut down the pump immediately.

The pump can be shut down with the medium inside. 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.

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.

Keep a vessel below the relief valve for any drain off.

Be careful! - Fluid under pressure will gush out the moment you open the valve.

If the pump is to be unused for a prolonged period, purge and clean it.