dosatron D 25 RE 2 - Seals and Valve Maintenance; Suction Valve Cleaning and Refitting; Dosing Seals and Fittings Replacement

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DOSATRON INTERNATIONAL / 17
CHANGING SEALS IN THE INJECTION ASSEMBLY (cont...)
CLEANING AND REFITTING THE SUCTION VALVE
- Turn off the water supply and allow the pressure to drop to zero.
- Unscrew the nut (Fig. 15-E) and pull downwards to remove the suction tube
(Fig. 16-T).
- Unscrew and remove the nut (Fig. 16-N).
- Pull downwards to remove the suction valve assembly (Fig. 17).
- Rinse copiously the different parts with clean water, re-assemble them (Fig. 17).
- Put the valve back (Fig. 17-P) in the doser body (Fig. 17-D), push it in the back.
- Check that the return spring is working.
- Re-assemble in the reverse order to the above by hand.
N
Fig. 16 Fig. 17Fig. 15
T
P
D
E
CHANGING THE DOSING SEALS
- Change the seals, the suction valve and the barbed fitting.
- To do this, please refer to the drawings of the different models at the end
of this manual.
- Change the seals once a year.
- Turn off the water supply and allow the pressure to drop to zero.
- Take off the suction tube of product, remove the injection assembly as des-
cribed in the previous chapter.
- Pull downwards to remove the injection assembly.
- Re-assemble in the reverse order to the above.