40
Translation of the original operating instructions
DUO
MIX
270
DM270_BAoDB_en_1507 • rs
Maintenance
6.4 Proportioning pump
In order to avoid damaging the proportioning pump due to material hardening,
the release agent chambers of the fluid pumps are filled with release agent as
a material plasticiser. Depending on the characteristics of the process materi-
al, signs of wear will appear on the fluid pump packings after a certain time in
operation. The fluid may be pressed by the packings in this case, and may then
harden. Packing wear can be discerned by discolouration of the release agent.
The fluid pumps are equipped with the following maintenance elements:
No. Description
1
To fill in release agent,
open the lid of the flu-
id reservoir and inject
release agent using the
dosing bottle.
2
The release agent level in
the fluid reservoir should
be between the "MIN" and
"MAX" marking.
3
Unscrew the drain screw
to drain release agent.
Fig. 25: Fluid reservoir and drain screw
1
3
2
6.4.1 Check the release agent level in the fluid pumps
Prior to every start-up, check the release agent level und top up if necessary.
6.4.2 Check the release agent in the fluid pumps for material residues
Check the release agent every 50 operating hours for material residues.
If material residues are apparent in the release agent, you must assume that
the packing for the respective material pump has become worn.
In this case, have the pump packing replaced as quickly as possible.
