KSB BOA-CVP H, Installation & Operating Manual

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7 Servicing/Maintenance
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BOA-H Mat P
7. Tighten hexagon nuts 920.3 crosswise to the specified ( ð Section 7.5, Page 30)
tightening torque.
8. Tighten stuffing box screw 45-6 up to the stop, applying a torque of 20 to
30 Nm.
9. Mount the actuator.
7.4.2.2 Fitting the graphite gland packing
545
45-6
416
474
920.2
722
161
200
350
Fig. 11: Fitting the graphite gland packing
ü The spare parts required are available.
ü
All dismantled parts have been cleaned and checked for wear.
ü Any damaged or worn parts have been replaced by original spare parts.
1. Check the stem surface. If the surface is damaged, the stem also needs to be
replaced; otherwise the stem seal will soon start leaking again.
2. Insert stem 200 into bonnet 161 from below.
3. Place sleeve 520 and gland packing 461 onto stem 200 and insert into the gland
packing chamber.
4. Use stuffing box screw 45-6 to insert the complete V-packing set into the seal
chamber and tighten by hand.
5. Insert new bonnet gasket 411.2.
6. Place assembled bonnet 161 onto the valve body.
7. Tighten bonnet nuts 920.3 crosswise to the specified tightening torque
( ð Section 7.5, Page 30) .
8. Tighten stuffing box screw 45-6 to the assembly torque
( ð Section 7.5, Page 30) . After approx. one minute undo the stuffing box
screw again and move the stem up and down several times. Then tighten the
stuffing box screw to the in-service torque (
ð
Section 7.5, Page 30) .
9. Mount the actuator.