
14
453345 ISS S 07.2010
5. Maintenance
8.
Remove the O-ring (item 5.5) from the rotary seal face.
9.
Clean the stator and rotary seal face locations, if necessary with air
or water.
9a.
In the case of water-flushed/aseptic shaft seals, the back plate
must be removed to dismantle the rear shaft seal. The rear seal
stationary seal face (item 5.6) is mounted in the pressure ring
(item 5.11) and the rotary seal face (item 5.7) is mounted on the
shaft (item 11). These are removed in the same way as the front
seal components.
10.
Check O-rings (item 5.5) for signs of cracks, lack of elasticity,
brittleness and/or chemical attack. Replace worn or defective parts.
11.
Check the stationary seal face (item 5.6) and rotary seal face (item
5.7) for signs of wear too. The wearing surfaces must be
completely free of scratches/cracks. If not, the rotary seal face and
stationary seal face must both be replaced.
11a.
In the case of water-flushed shaft seals, check the rear seal rings
(item 5.7, 5.6) for wear too, and replace if necessary.
12.
Fit new O-rings on the stationary seal face and rotary seal face.
Note.
Remember to moisten these with water.
13.
Fit the rotary seal face (item 5.7) on the impeller without using
tools.
Note.
The "notch" in the rotary seal face must be located so that it
mates with the driving pin (item 5.8) in the impeller hub.
13a.
In the case of water-flushed/aseptic seals, also fit a rotary seal face
(item 5.7) with its O-ring (item 5.5) in the location on the shaft,
again without using tools.
14.
Fit drain pipe (item 5.4) to the back of the stationary seal face (item
5.6). Fit the stationary seal face (item 5.6) on the back plate without
using tools.
Note.
The "notches" in the stationary seal face must mate with the
driving dogs on the carrier in the back plate. Check that the
stationary seal face is posi tioned so that it slides backwards and
forwards easily in the back plate.
14a.
Where there are water-flushed/aseptic seals, fit the stationary seal
faces (item 5.6) into the seal cover (item 5.9) and back plate (item
7a).
15.
After fitting, clean the wearing surfaces.
15a.
For liquid-flushed/aseptic seals, remount the back plate (item 7a).
Fitting
Positioning the water supply
connections
Checking parts
for wear
Содержание W+
Страница 2: ......
Страница 4: ......
Страница 12: ...8 453344 ISS S 07 2010 Sectional Drawing W Section 1 Shaft size ø25 and ø35 Section 2 Shaft size ø25 and ø35 ...
Страница 23: ......