31 255548 Rev.1
9.2.10.5 Cylindrical pipe nipples
Th
e following values apply to new pipe nipples in
cast-iron casings (EN-GJL-250, CuZn).
Size
Tightening torque [Nm]
G 1/4 A
23
G 3/8 A
46
G 1/2 A
60
G 3/4 A
120
G 1 A
206
G 1 1/2 A
380
G 2
535
Tab. 30 Tightening torques for pipe nipples in cast-iron
casings
9.3 Conical pipe fi ttings
Th
e above specifi ed tightening torques do not apply
to conical screw-in threads. Here, tightness is not
achieved by using a specifi c tightening torque but by
additional sealing material (e.g. Tefl on® tape, adhesive).
9.4 Permissible forces acting on pump nozzles
Size
Inlet/outlet nozzles
Torque [Nm]
Force [N]
DN 25
75
250
DN 40
100
320
DN 50
140
430
DN 65
20
550
Tab. 31 Permissible forces acting on pump nozzles
9.5 Preserving agents
Rivolta preserving agent (recommended) or
comparable products
Type of
storage
Period of
storage
[months]
Inside/ouside
preservation
Repeat inside/
outside treat-
ment [months]
in
closed
dry and
dust-free
rooms
1-3
Rivolta
K.S.P. 130
3
> 3
(→ 1.2 Applicable
documents)
Tab. 32 Preserving agents
9.5.1 Preservation fi lling volumes
Type
Filling volume
inside system
[QT]
Filling volume
outside system
[QT]
SM30B
0.3
approx. 0.6
SM55B
2.5
approx. 5.8
SM75B
3.0
approx. 6.3
SM100B
3.9
approx. 8.5
SM200B
4.2
approx. 9.5
SM250B
4.4
approx. 10
Tab. 33 Filling volumes preservation
9.6 Test pressure for pressure test
Use water for the pressure test. Th
e maximum
permissible pressure is 44 PSI.
9.7 Accessories
Accessories included within the scope of supply are
listed on the delivery note.
