Richter KAP-N Series Bottom Drain Ball Valves - Manual (Page 10)

Installation and Operating Manual
Series KA-N, KAP-N, ball and stem
9520-067-en Revision 00
TM 6404 MPE/Wm Page 10 Edition 02/2006
9 Maintenance
Spare parts are to be ordered with all the details in
acc. with the valve identification.
Only original spare parts may be installed.
To prevent leaks, a regular check of the connection
screws should be made in line with the operating
requirements.
For torques see Section 1.2.
9.1 Dismantling
9.1.1 KA-N with lever
It is possible with a KA-N, KAP-N with ball and stem
to replace the seat rings and ball without disman-
tling the entire bottom drain ball valve.
It is equally possible to remove the packing gland
follower, spring gland follower and packing insert?
without dismantling the body.
The entire bottom drain ball valve must merely be
taken apart to remove the stem.
For sectional drawings, see Section 10.
9.1.2 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.
9.1.3 Packing bellows
Remove lever 203.
Dismantle packing gland follower 503 and spring
gland follower 502.
Remove grounding spring washer 557.
The thrust ring 405/1, packing bellows 403 and
retaining washer 526 (not in DN 150 and DN
200) are one unit and it is levered out using 2
screwdrivers.
Remove retaining washer 526.
Separate thrust ring 405/1 and packing bellows
403 by pushing them apart.
9.1.4 KAP-N 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
Section 9.1.3.
9.1.5 Stem
Dismantling as described in Section 9.1.3.
Undo screw connection body end piece/main
body.
Remove body end piece 102.
Remove ball 200 with stem 202 in the 'closed'
position. Make sure that the body lining is not
damaged.
Swivel ball 200 out of the stem 202.
9.2 Assembly
Prior to assembly all parts are to be cleaned and
the plastic-lined components checked for dam-
age.
An entire assembly procedure is described.
Insert seat rings 401 into the main body 101 and
body end piece 102.
Insert stem 202 from inside into the main body
101.
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
'closed' position.
See also Section 10.2.
Mount body end piece 102. Tighten the greased
body screw to a tightening torque in accordance
with Section 1.2 in diametrically opposite se-
quence.
9.2.1 Packing bellows
Press thrust ring 405/1 into the packing bellows
403.
Insert retaining washer 526.
Press unit into main body 101.
Press in grounding spring washer 557.