Chapter 9
Visco
Twin_002 EN
Page 9-11
Diagonal grooves opposing
Possible damage to property
•
Equally clean the seal housing as well as the shafts and seal seats and carefully check the
removed parts. Replace any damaged parts as well as all O-rings and shaft sealing rings
•
During disassembly be careful about the drive pins 210. If they get lost use new ones.
Therefore use grease to stick them in the holes of the drive discs 150 and inboard rotor
holders 80 respectively.
Installation:
1.
Insert disc rings 150 with the pre-assembled drive pins 210 (glue them into the disc ring using
grease) into the seal housing from behind. The drive pins must be directed to the front.
2.
Fit backup rings 180 into the rear groove of the seal housing.
Push wave ring 50 against it from behind.
3.
Slide spacers 190 against it.
4.
Insert retaining rings 200 using circlip pliers.
5.
Insert O-rings 140 into the front groove of the seal housing.
6.
Insert centrifugal disk 2274 onto both shafts (against the shaft, shoulder its must be tight)
7.
Insert O-rings into shaft sleeves 2273. Lightly grease the shaft sleeves 2273 and
push against the centrifugal disk 2274. Screw in set screws 1064 into the shaft sleeves while
keeping pushed towards the centrifugal disk and fix it. (1.5 Nm torque)
8.
Press in shaft seals 2272 into seal housing 1029.
9.
Carefully slide the seal housing onto the shafts. Position screws 2259 with washers 2260 and
screw them into the pump casing. Tighten the fitting screws
(10 Nm torque).
10.
Carefully slide inboard stators 11 into the seal
housing via the shaft. The stator groove must
engage with drive pins 210 of drive disc 150.
(see picture)
11.
Place inboard rotor holders 80 incl. seal faces
40 and built-in O-rings onto the shaft.
Possible damage to property
•
Check the free room of motion of the sealing by pushing the
inboard rotor holder and spinning it bidirectional. During spinning
a small gap shall be noticeable, coming from the gap between the
drive pins 210 and the grooves they are positioned in the seal
faces. During pushing the gap between the stator 11 and the seal
housing 1029 shall stay circular constant.
•
Therefore dimension A in the drawing showing the sealing cross
section shall be controlled. (depth gauge)
A = 33.3
±±±±
0.3 mm ; (
Visco
Twin 130) 25.2
±±±±
0.3 mm (
Visco
Twin 104)
12.
When installing the screw spindles make sure that the O-rings 130
(are located to the front of the inboard rotor holders) are correctly
placed in their receptacle. The seals will now be prestressed during
the installation of the screw spindles. (see 9.3.4)
13.
Insert O-ring 1088 in seal housing, insert pump housing 1033.
14.
Screw in screws 1016 with washers1015 and tighten.
(torque 150Nm)
ATTENTION
ATTENTION
Manual ViscoTwin 104-xx 3A