Series KN/F, KNP/F, KN-D/F, KNP-D/F
Page
13
9520-050-en
Revision 18
TM 9818
Edition 11/2018
9.2.1 Packing bellows
♦
Press thrust ring
405/1
into packing bellows
403
.
♦
Install retaining washer
526
(not in DN 150,
200/150 and 200).
♦
Press unit into main body
101
.
♦
Press in grounding spring washer
557
.
9.2.2 Ball valve with lever
♦
Mount lever stop
577
, spring gland follower
502
(in
DN 80, 100, 150, 200/150 and 200 are 2 spring
gland followers
502
) and packing gland follower
503
. Tighten packing nuts until there is no gap
between packing gland follower
503
and spring
gland follower
502
. See
Chapter 1.3
and
10.2
.
♦
Seal any tapped bores still open with plugs.
♦
Mount lever
203
.
9.2.3 Ball valve with actuator
♦
Mount spring gland follower
502
(in DN 80, 100,
150, 200/150 and 200 are 2 spring gland followers
502
) and packing gland follower
503
. Tighten
packing nuts until there is no gap between packing
gland follower
503
and spring gland follower
502
.
See
Chapter 1.3
and
10.3
.
♦
Mount bracket
510
with the opening at right angles
to the direction of flow. See sectional drawing in
Section 10
.
♦
Mount coupling
804
and actuator
850
. Observe the
actuator position in accordance with the actuator
operating manual.
♦
Observe the ball/stem position in accordance with
the position of the actuator.
9.3 Dismantling ball valve with
ball and stem
It is possible with a ball valve with ball and stem to
replace the seat rings and ball without dismantling the
entire ball valve.
It is equally possible to remove the packing gland
follower, spring gland follower and packing insert
without dismantling the body.
The entire ball valve must merely be taken apart to
remove the stem.
For sectional drawings, see
section 10
.
9.3.1 Ball and seat rings
♦
Move ball
200
into the 'closed' position.
♦
Undo body nuts and bolts.
♦
Remove body end piece
102
.
♦
Remove ball
200
from the main body
101
by
swivelling it.
♦
Remove seat rings
401
from the main body
101
and body end piece
102
and replace.
9.3.2 Packing bellows
♦
Remove lever
203
.
♦
Dismantle packing gland follower
503
and spring
gland follower
502
.
♦
Take out grounding spring washer
557
.
♦
The thrust ring
405/1
, packing bellows
403
and
retaining washer
526
(not in DN 150 and 200/150)
are one unit and it is levered out using 2 screw-
drivers.
♦
Remove retaining washer
526
.
♦
Separate thrust ring
405/1
and packing bellows
403
by pushing them apart.
9.3.3 Ball valve with actuator
♦
Remove actuator
850
and coupling
804
.
♦
Dismantle packing gland follower
503
and spring
gland follower
502
.
♦
Remove bracket
510
.
Further dismantling is performed as described in
Chapter 9.1.3
.
9.3.4 Stem
♦
Dismantling as described in
section 9.3.1
.
♦
Undo screw connection body end piece
102
/ main
body
101
.
♦
Remove body end piece
102
.
♦
Remove ball
200
and stem
202
in closed position.
Make sure that you do not damage the body lining.
♦
Swivel ball
200
from stem
202
.
9.4 Assembly
♦
Prior to assembly all parts are to be cleaned and
the plastic-lined parts checked for damage.
♦
Insert seat rings
401
in the main body
101
and
body end piece
102
.
♦
Insert stem
202
from inside into the main body
101
. In the case of DN 150 and 200/150 with an
additional disc
550/1
.
♦
Move stem
202
into the 'closed' position.
Swivel ball
200
into the stem
202
. Any pressure
relief or drain bore must lie on the p1 side in the
"off" position. See also
section 6.2
.
♦
Mount body end piece
102
. Tighten the greased
housing screws cross over with a tightening torque
according to
section 1.3
.
