Operating Instructions
10/2010
1096.0799 | VU / VH Series
29
2.
Installation of inter casings on suction/discharge casing
Adjust the inter casing (137) (marks) and force it into
the suction casing (106).
Adjust the inter casing (137.3) (marks) and force it into
the discharge casing (107).
Screw hexagon socket head screws (914) through the
suction/discharge casing into the inter casings
(137/137.3) and fasten them.
Additional steps for VH 300/350/400
Adjust the inter casings (137.1/137.2) (mark),
force them into position and compress them.
3.
Installation of impeller and pump shaft
Push the lock washer (931) onto the non-drive side of
the pump shaft.
Screw the impeller nut (922) onto the pump shaft
(211).
Insert the fitting key (940.1) into the pump shaft.
Vertically clamp the pump shaft with the drive side
pointing up.
VU 300/450
Push the impeller (230) onto the pump shaft.
The impeller blades must be tilted in the direction of rota-
tion.
VH 300/350/400
Push the impeller (230.1) onto the pump shaft.
The impeller blades must be tilted in the direction of rota-
tion.
Push the shaft sleeve (523) onto the pump shaft.
Push the inter casings (137.1/137.2) jointly over
the shaft sleeve (523).
Insert the fitting key (940.1) into the pump shaft.
Push the impeller (230) onto the pump shaft.
The impeller blades must be tilted in the direction of rota-
tion.
Push the lock washer (931) onto the pump shaft.
Screw the impeller nut (922) onto the pump shaft.
Set the impellers in accordance with adjustment di-
mension L by turning the impeller nuts.
Following the setting process, secure the impeller nuts
(922) using lock washers (931).
4.
Installation of stage casing and pump shaft
Horizontally clamp the discharge casing (107) (inter
casing on top).
VU 300/450
Insert the complete pump shaft (drive side point-
ing up) into the discharge casing (107), put down
on inter casing (137.3).
Force the stage casing (110) into the inter casing.
VH 300/350/400
Force the stage casing (110.1) into the inter cas-
ing (137.3).
Insert the complete pump shaft (drive side point-
ing up) into the discharge casing (107).
Adjust the inter casings (marks), force them onto
the stage casing (110.1) and put them down.
Force the stage casing (110) into the inter casing
(137.1).
5.
Installation of suction casing
Adjust the suction casing (106) (marks) and force it
onto the stage casing (110).
Secure the casing bolts (563) and slightly fasten them
with hexagon nuts (920.1).
6.
Installation of mechanical seal (drive side)
Moisten the auxiliary seal of the rotating unit (047) with
lubricant (grease containing PTFE).
Push the rotating unit (047) onto the pump shaft (211)
by a screwing movement in the sense of winding of the
spring.
Moisten the auxiliary seal of the stationary unit with lu-
bricant (alcohol, water).
Manually press the stationary unit (047) into the shaft
sealing casing (411).
Adjust the shaft sealing casing (441) (observe the
flushing channel), force it into the suction casing (106)
and fasten it with hexagon head screws (901.1).
Push the splash ring (507) onto the pump shaft.
7.
Installation of bearing housing on suction casing (drive
side)
Force the bearing cover (360.2) into the bearing hous-
ing (330) and adjust it, fasten it with hexagon head
screws (901.1).
Push the bearing housing (330) over the pump shaft
(211), force it into the suction casing (106) and fasten it
with hexagon head screws (901.1).
Press the rolling bearing (320) onto the pump shaft.
With VU 300/450, the rolling bearings have to be lubri-
cated prior to pressing them onto the shaft.
Force the bearing cover (360) into the bearing housing
(330), adjust it and fasten it with hexagon head screws
(901.2).
Insert the fitting key (940) into the pump shaft.
8.
Installation of mechanical seal (non-drive side)
Rotate the pump 180° (drive side pointing down).
Moisten the auxiliary seal of the rotating unit (047.1)
with lubricant (grease containing PTFE).
Push the rotating unit (047.1) onto the pump shaft
(211) by a screwing movement in the sense of winding
of the spring.
Moisten the auxiliary seal of the stationary unit with lu-
bricant (alcohol, water).
Manually push the stationary unit (047.1) into the shaft
sealing casing (411).
Adjust the shaft sealing casing (441) (observe the
flushing channel), force it into the discharge casing
(107) and fasten it with hexagon head screws (901.1).
9.
Installation of bearing housing on discharge casing (non-
drive side)
Force the bearing cover (360.2) into the bearing hous-
ing (330) and adjust it, fasten it with hexagon head
screws (901.1).
Force the bearing housing (330) into the discharge
casing (107) and fasten it with hexagon head screws
(901.1).
Push the ring (500.1) onto the pump shaft (211).
VH 300/350/400
Press the rolling bearing (320) onto the pump
shaft (211).
Push the lock washer (931.1) onto the pump shaft
(211).
Screw the shaft nut (921) onto the pump shaft
(211), fasten and secure it with lock washer
(931.1).
VU 300/450
Lubricate the rolling bearing (320.1) and press-fit
into the bearing housing (330).
Push the withdrawal sleeve (531), the ring (500)
and the lock washer onto the pump shaft (211).
Screw the shaft nut (921) into position, provide for
an appropriate bearing clearance and secure the
shaft nut with a lock washer (931.1).
Force the bearing cover (360.1) into the bearing hous-
ing (330), adjust it and slightly fasten it with hexagon
head screws (901.1).
