985.29-1 p.10
5.3 Dismantling the Venturi insert
Loosen the cylinder screw on the profile clip (217) and remove it. Disconnect the body (201) together
with the Venturi insert and pin (204) from the induction elbow.
The parts should be carefully separated from one another in order to prevent damage
to the pin by bending, etc.
Now the Venturi insert/pin/torpedo unit (Figure 9) can be pulled out of the mixer body.
All parts of this unit are adhered to one another and may not be separated from one another. If the parts can
Fig 9:
Venturi insert/pin/torpedo unit
5.4 Replacing the guide belts
Remove and dispose of the old guide belts (221 and 222). Clean the sliding surfaces on the Venturi insert
and groove for the belts with adjacent surfaces and allow to dry.
Fit new guide belts.
The guide belts and sliding surfaces may not be lubricated. Lubrication of the parts can
negatively influence the operating behaviour of the devices.
Caution
!
5.5 Installing the Venturi insert
Move the body up to the vertical position with the connection side facing the induction elbow. Slide the Venturi insert with
the small diameter forward into the body and check the ease of movement of the insert. The resistance may be too great
when sliding the insert due to production tolerances. In this case, the guide belts must be adjusted by removing a thin layer.
In the process, it must be ensured that the Venturi insert does not slip through under its own weight. If this should occur,
the play between the insert and the belts is too great.
5.6 Mounting the induction elbow
After the adaptation of the guide belts the body is mounted together with the induction elbow (223). The body remains
vertically aligned. Prior to mounting the induction elbow, make sure that the O-ring (203) is not twisted out of the centring
collar. Carefully place the elbow on the mixer body so that the pin goes in through the hole in the induction elbow (Figure 7)
provided for this purpose. Place the profile clip on the angles of the two flanges (on the housing and the induction elbow)
and connect the two parts in the correct spatial arrangement by tightening the cylinder screw.
Rod
Venturi insert
Torpedo
Caution
!