VARISCO V6 Instructions Pour L'utilisation Et L'entretien page 27

INSTRUCTIONS FOR THE USE AND MAINTENANCE - V
12.6 Mounting the ST7 double mechanical seal (fig. 23)
❑ Set up the shaft in the vertical position with the rotor on the bench.
❑ Slip on the rear cover (09).
❑ Clean the shaft thoroughly.
❑ Slip on the rotating part of the mechanical seal (66.1) with the seat facing away
from the rotor. Take care not to damage the internal gasket during this operation.
❑ Lock the grub screws after positioning the seal as shown in the table below.
NB: The table shows the diameter D of the shaft and the distance L1
between the seal (66.1) and the rear cover (09) when the latter is not fixed in
place but only resting on the rear of the rotor (fig. 24).
❑ Mount the stationary seat carefully in the seal box (77).
❑ Mount the seal box on the rear cover and repeat the preceeding operations with
the second seal (66.2) and seal box (81).
❑ Mount the pedestal and fix the rear cover temporarily to the pedestal. Screw on
the shaft lock nut (16.1) with its lock washer (16.2) (Fig. 10).
❑ Mount the outer bearing lock ring (14 Fig. 10) and tighten the seal box screws.
❑ Mount the casing and cover and adjust the rotor position as described in
paragraph 10.4.
Attention: The cover (04) must be mounted correctly. The idler pin (06) must be
positioned symmetrically between the two ports in the shorter path between the
ports.
❑ Block the security dowels (45) of the lock rings (14,15).
Models V25-2 and V30-2 do not have security dowels.
12.7 Mounting the ST8 double mechanical seal (fig. 25)
❑ Set up the shaft in the vertical position with the rotor on the bench.
❑ Slip on the rear cover (09).
❑ Clean the shaft thoroughly.
❑ Mount the seal box (77) after fitting the stationery seal seat (66.1).
❑ Lock the grub screws after positioning the seal as shown in the table below.
NB: The table shows the diameter D of the shaft and the distance L2
between the seal (66.1) and the seal box (77) when the rear cover (09) is not
fixed in place but only resting on the rear of the rotor (fig.26).
For the V25-2 and V30-2, is not necessary to fix the grub screws because
the seal is double with a single rotating part. It is therefore sufficient to finish
mounting the seal and, once the seal boxes are mounted, make the grub
screws coincide with one of the two flush holes on the rear seal box and fix
them.
❑ Mount the rotating part of the seal (66.2) with the seat facing upwards and fix the
grub screws.
❑ Mount the seal box (81) after fitting the stationary seal seat (66.2).
❑ Block by means of screws (80.1) and nuts (80.2).
❑ Mount the pedestal and fix the rear cover temporarily to the pedestal. Screw on
the shaft lock nut with its lock washer.
❑ Mount the outer bearing lock ring (14) (fig. 10) and tighten the seal box screws.
❑ Mount the casing and cover and adjust the rotor position as described in
paragraph 10.4.
Attention: The cover (04) must be mounted correctly. The idler pin (06) must
be positioned symmetrically between the two ports in the shorter path between
the ports.
❑ Block the security dowels (45) of the lock rings (14,15).
Models V25-2 and V30-2 do not have security dowels.
Dimension L2 for standard seals ISO 3069 DIN 24960
for pumps serie K
Pump type D (mm)
V25-2 22
V30-2 22
V50-3 30
V60-2 35
V70-2 40
V80-2 40
V85-2 40
V90-2 55
V100-2 55
V120-2 70
V150-2 70
V151 70
V180 80
V200 90
Dimension L1 for standard seals ISO 3069 DIN 24960
Pump type
V25-2
V30-2
V50-3
V60-2
V70-2
V80-2
V85-2
V90-2
V100-2
V120-2
V150-2
V151
V180
V200
L2 (mm)
-
-
16,5
15
22,5
22,5
22,5
27,5
27,5
14,5
14,5
14,5
45,5
40,5
fig.23
fig.24
for pumps serie K
D (mm) L1 (mm) L1
bis (mm)
22 - -
22 - -
30 6 -
35 4,5 -
40 15,5 -
40 15,5 -
40 15,5 -
55 8 -
55 8 -
70 9,5 -
70 9,5 -
70 9,5 -
80 24 -
90 19 25
fig.25
fig.26
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