Assembly - VARISCO V6 Instructions Pour L'utilisation Et L'entretien

12

ASSEMBLY

In general, the disassembly instructions should be followed in reverse order.
12.1 Mounting the ball bearing (38) fig. 10
❑ Clean the seat on the pedestal (08) thoroughly.
❑ Mount the bearing using a bench press.
❑ Tighten the bearing lock rings (14,15). They should be adjusted when the pump
is completely assembled.
12.2 Mounting the shaft bush (36) fig. 10
❑ Clean the seat in the rear cover (09) thoroughly. The shaft bush must be mounted
using a press. It is perfectly symmetrical and can therefore be mounted in either
direction. When mounting the bush in its seat, use a continuous movement. ONLY
for the V 180 and V 200 (versions with Graphite Bushes), heat the rear cover to 80
degrees C before mounting the bush. Wait until it has cooled completely and use
machine tools to bring it to the tolerance indicated by Varisco SpA.
12.3 Mounting the shaft and rotor (02) fig. 10
❑ Mount the rotor key (41) in its seat on the shaft and force the shaft into the rotor
with a press. Do not mount the shaft key (42).
❑ Assemble the shaft (05) with the rear cover (09), the gland or seal box (80) and the
bearing housing. This operation is easier to carry out with the pump positioned
vertically resting on the rotor.
12.4 Mounting the ST5, ST6 mechanical seal (cast iron pumps from V6 to V25)
(fig. 20)
❑ Set up the shaft in the vertical position with the rotor on the bench.
❑ Clean the shaft thoroughly.
❑ Slip on the rotating part of mechanical seal (66.1) with the seat facing away
from the rotor.
Take care not to damage the internal gasket during this operation.
❑ Make sure that the spring is locked in its seat.
❑ Slip on seal box (80) wiyh the stationary face (66.2) already fitted.
❑ Screw on the cover (80.6) until it is tight.
12.5 Mounting the ST4, ST5, ST6 mechanical seal (fig.21)
❑ 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 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 L between
the seal (66) and the rear cover (09) when the latter is not fixed in place but
only resting on the rear of the rotor (fig. 22).
❑ Mount the stationary seat (66.6) carefully in the seal box (80).
❑ Mount the V ring (68) in the seal box (80).
❑ Mount the seal box on the shaft without fixing it, taking care not to damage
the V-ring.
❑ Slide the inner bearing lock ring (15) and the sleeve (17) on to the shaft (fig. 10)
❑ 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) and tighten the seal box screws.
❑ Mount the casing and cover and adjust the rotor position as described in
paragraph 10.4.
Attention: (fig. 10) 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.
26
INSTRUCTIONS FOR THE USE AND MAINTENANCE - V
V6>V25G
Dimension L for standard seals ISO 3069 DIN 24960
for pumps serie K
Pump type D (mm)
V6, V12 * 14
V20, V25 * 18
V25-2, V30-2 22
V50-3 30
V60-2 35
V60-2 (+R) 35
V70-2 40
V70-2 (+R) 40
V80-2 40
V80-2 (+R) 40
V85-2 40
V90-2 55
V90-2 (+R) 55
V100-2 55
V100-2 (+R) 55
V120-2 70
V150-2 70
V151 70
V180 80
V200 90
ISO 3069 DIN 24960 standard seals
*
* NON standard seals
fig.20
fig.21
fig.22
L (mm)
-
-
9
14
18
17
25,5
35,5
25,5
35,5
25,5
22,5
34
22,5
34
9,5
9,5
9,5
40,5
35,5