KSB BOA-SuperCompact - Page 45

8 Servicing/Maintenance
45 of 60
WARNING
Failure to test overhauled valves
Hazard to persons and the environment!
▷ After reassembly and prior to commissioning/start-up, the valves must be
subjected to shell testing and leak testing to DINEN12266-1.
NOTE
Do not apply additional sealing agents to asbestos-free gaskets. In the case of
valves with anti-adhesive coatings, only use agents explicitly recommended by the
sealing element manufacturer.
8.2.2 (Re-)tightening the back-up gland packing
When delivered, the back-up gland packing is not fully tightened.
DANGER
Bellows failure
Leakage of hot and/or toxic fluids!
Risk of burns!
▷ Tighten the stuffing box screws (45-6) until no leakage can be seen.
45-6
461
Fig.9: Sectional drawing of
BOA-H
Table36: Stuffing box screws to DIN913
DN Thread Hexagon socket
15-100 M 10 SW 5
125-150 M 12 SW 6
200-350 M16 SW8
The valve must be replaced as quickly as possible to ensure proper functioning!
8.2.3 Removing electric, pneumatic or hydraulic actuators
DANGER
Removing/dismantling the actuators
Risk of injury!
▷ Observe the actuator's operating manual.
8.2.4 Tightening torques
8.2.4.1 Tightening torques for the bonnet/cover bolting
Use a torque wrench to tighten bolted/screwed connections 902/920 or 901 between
the bonnet/cover and the body.
Table37: Bolt tightening torques, BOA-H [Nm]
PN Material DN
15 20 25 32 40 50 65 80 100 125 150 200 250 300 350
16 5.1301
33)
20 20 20 30 30 30 80 80 150 150 150 150 260 260 -
16 5.3103
34)
20 20 20 35 35 35 90 90 170 170 170 170 290 290 290
25 5.3103
34)
20 20 20 35 35 35 90 90 170 170 170 - - - -
33) EN-GJL-250 (JL1040)
34) EN-GJS-400-18-LT (JS1025)