IM-P204-03
CH Issue 8
35
5.4 Reassembly of the valve bonnet
Fig. 8
Four-hole mounting on
the DN40 - DN80 sizes
Fig. 9 Eight-hole mounting
on the DN100 only
1
3
4
2
8
5
6
7
Bonnet
gasket
Tighten the four bonnet screws with an
8 mm hexagon key in stages following
the sequence shown in Figure 7 to a
torque of 28 - 32 N m.
1
2
3
Fit the screws and leave a small gap.
Raise and then lower the stem while
holding the bonnet firmly (to ensure plug
and seat alignment).
Invert the bonnet assembly; add the
new bonnet gasket on to the bellows
guide plate then lower the valve body
onto the bonnet.
Ensure the gaskets are aligned correctly.
Turn assembly back to the upright position
and loosely re-fit the cap screws.
Summary of Contents for DLV7
Page 40: ...IM P204 03 CH Issue 8 40...
