8 Servicing/Maintenance
31 of 36
BOA-Control/ BOA‑Control IMS
NOTE
To maintain functional reliability, new sealing elements must be used when the
valve is reassembled.
8.2.5 Tightening torques
8.2.5.1 Tightening torques for the bonnet bolting
Use a torque wrench to tighten the bolted connections (902/920 or 901) between the
bonnet and the body.
Table 15:
Bolt tightening torques for BOA-Control IMS [Nm]
Nominal pressure
PN
Material number
Nominal size
250
300
350
16
5.1301
12)
260
260
-
16
5.3103
13)
290
290
290
8.2.6 Bolt lengths for flange connections
Connecting elements are needed to install a valve in a pipeline. These are bolts and
nuts.
Select the bolts and nuts in accordance with DIN EN 1515-4 "Flanges and their joints,
Part 4, Selection of bolting". In order to ensure the correct installation of the valve,
the bolts and nuts must be made of the materials defined by this standard as a
function of pressure and temperature for use within the scope of the Pressure
Equipment Directive 97/23/EC.
The bolt lengths are specified without considering tolerances; they refer to the
installation of a valve in a pipe with a standardised steel mating flange to
DIN EN 1092-1.
The number of bolts, their thread size and length are specified for the respective
valve series and nominal pressures. This data can also be obtained via KSB's flange
selector (reference No. 0570.3).
Table 16:
Bolt sizes and lengths to DIN EN 1092-2
PN 10/16
DN
BOA-Control/BOA-Control IMS
15
4x M12 x 45
20
4x M12 x 50
25
4x M12 x 50
32
4x M16 x 55
40
4x M16 x 55
50
4x M16 x 55
65
4x M16 x 55
80
8x M16 x 60
100
8x M16 x 65
125
8x M16 x 65
150
8x M20 x 70
200
12x M20 x 75
14)
250
12x M24 x 85
14)
300
12x M24 x 85
14)
350
16x M24 x 95
14)
12)
EN-GJL-250 (JL1040)
13)
EN-GJS-400-18-LT (JS1025)
14)
PN 16 only
