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1.6 Diaphragm breakage
If the diaphragm leaks or is broken, dosing liquid
escapes from the drain opening (fig. 10, pos. 11) on
the dosing head. Observe section
breakage.
Warning
Danger of explosion, if dosing liquid has
entered the pump housing!
Operation with damaged diaphragm can
lead to dosing liquid entering the pump
housing.
In case of diaphragm breakage,
immediately separate the pump from the
power supply!
Make sure the pump cannot be put back
into operation by accident!
Dismantle the dosing head without
connecting the pump to the power supply
and make sure no dosing liquid has
entered the pump housing. Proceed as
described in section
case of diaphragm
To avoid any danger resulting from diaphragm
breakage, observe the following:
•
Perform regular maintenance. See section
7.1 Regular
maintenance.
•
Never operate the pump with blocked or soiled
drain opening.
– If the drain opening is blocked or soiled,
proceed as described in section
7.4.1 Dismantling in case of diaphragm
breakage.
•
Never attach a hose to the drain opening. If a
hose is attached to the drain opening, it is
impossible to recognise escaping dosing liquid.
•
Take suitable precautions to prevent harm to
health and damage to property from escaping
dosing liquid.
•
Never operate the pump with damaged or loose
dosing head screws.
7.4 Diaphragm
7.4.1 Dismantling in
breakage.
2. General information
The DDE dosing pump is a self-priming
diaphragm pump. It consists of a housing
with stepper motor and electronics and a
dosing head with diaphragm and valves.
Excellent dosing features of the pump:
•
Optimal intake even with degassing media, as
the pump always works at full suction stroke
volume.
•
Continuous dosing, as the medium is sucked up
with a short suction stroke, regardless of the
current dosing flow, and dosed with the longest
possible dosing stroke.
2.1 Applications
The pump is suitable for liquid, non-abrasive,
non-flammable and non-combustible media strictly in
accordance with the instructions in these installation
and operating instructions.
Areas of application
•
Drinking water treatment
•
Wastewater treatment
•
Swimming pool water treatment
•
Boiler water treatment
•
CIP (Clean-In-Place) Observe section
3.2 Technical data for CIP (Clean-In-Place)
applications.
•
Cooling water treatment
•
Process water treatment
•
Wash plants
•
Chemical industry
•
Ultrafiltration processes and reverse osmosis
•
Irrigation
•
Paper and pulp industry
•
Food and beverage industries.
2.2 Improper operating methods
The operational safety of the pump is only
guaranteed if it is used in accordance with section
2.1
Applications.
Warning
Other applications or the operation of
pumps in ambient and operating
conditions, which are not approved, are
considered improper and are not
permitted. Grundfos cannot be held liable
for any damage resulting from incorrect
use.
Warning
The pump is NOT approved for operation
in potentially explosive areas!
Warning
A sunscreen is required for outdoor
installation!
7
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