English (GB)
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3. Product introduction
The DDA dosing pump is a self-priming diaphragm
pump. It consists of a housing with PMS (Permanent
Magnet Synchronous) motor and electronics, a
dosing head with double PTFE diaphragm and
valves, and the control cube.
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.
3.1 Applications
The pump is suitable for liquid, non-abrasive,
non-flammable and non-combustible media.
Observe the technical data of the product. See
section 4.1 Technical data.
Observe the freezing and boiling points of the dosing
medium.
Make sure that parts in contact with the dosing
medium are resistant to the dosing medium under
operating conditions. See data booklet:
• http://net.grundfos.com/qr/i/99021865.
Should you have any questions regarding the
material resistance and suitability of the pump for
specific dosing media, please contact Grundfos.
A sunscreen is required for outdoor installation.
Areas of application
• Drinking water treatment
• Wastewater treatment
• Boiler water treatment
• Cooling water treatment
• Process water treatment
• CIP (Clean-In-Place). Observe section
4.2 Technical data for CIP (Clean-In-Place)
applications.
• Swimming pool water treatment
• Chemical industry
• Ultrafiltration process and reverse osmosis
• Food and beverage industry
• Paper and pulp industry
• Irrigation
3.2 Improper operating methods
The operational safety of the pump is only
guaranteed if it is used in accordance with section
3.1 Applications.
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.
The pump is NOT approved for operation
in potentially explosive areas, automotive
applications or marine applications.
Frequent disengagement from the mains
voltage, e.g. via a relay, can result in
damage to the pump electronics and in the
breakdown of the pump. The dosing
accuracy is also reduced as a result of
internal start procedures.
Do not control the pump via the mains
voltage for dosing purposes!
Only use the "External stop" function to
start and stop the pump!
Only use the deaeration valve for
deaerating the pump. Make sure the
deaeration valve is closed during normal
operation.
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