ProMinent DULCO flex DFAa, Assembly And Operating Instructions Manual, Page: 14 / 32

4 Functional description
The package contents supplied with the DULCO ® flex DFAa is
selectable via the identcode.
The DULCO
® flex DFAa is a displacement pump. The feed chem‐
ical is transported by the rotor squeezing the hose in the direction
of flow. No valves are needed for this. This ensures gentle han‐
dling of the metered media.
The DULCO
® flex DFAa has been designed for safe and uncompli‐
cated operation, as well as straightforward maintenance.
The DULCO
®
flex DFAa can be used for many different media.
However, this pump type is often the optimal solution for abrasive,
shear-sensitive and viscose media.
Typical areas of use include processes where only a low discharge
pressure is required (max. 2 bar).
4.1 Construction
Main modules:
n
Drive Unit
n
Housing
n
Base frame
The pump housing is closed off with a screwed front cover in order
to avoid the risk of injury.
The motor serves to drive the rotor. Rollers at the ends of the rotor
serve to press the pump hose against the pump housing.
The rotary movement of the rotors alternately press and relax the
rollers in relation to the pump hose. This serves to suck the media
in and convey it into the metering line.
Brief functional description
Functional description
14