Richter BVA/F Series, Installation And Operating Manual

Page: 12 / 30

Series BVA/F, BVAP/F to ASME
Page 12
9520-036-en Revision 19
TM 10477 Edition 05/2022
9.3 Dismantling BVA/F, BVAP/F
with ball and stem
It is possible with a BVA/F, BVAP/F 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 9 .
9.3.1 Partial assembly ball and seat
rings
♦
Move ball 200 into the 'closed' position.
♦
Relieve the packing gland follower 503 by
undoing the hex. nuts 920/2 .
♦
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 insert and
stem
♦
Move ball 200 into the 'closed' position.
♦
Remove lever 203 .
♦
Dismantle packing gland follower 503 and spring
gland follower 502 .
♦
Take out grounding spring washer 557 .
♦
Undo body nuts and bolts.
♦
Remove body end piece 102 .
♦
The thrust ring 405/1 and packing insert 423 are
one unit and it is levered out using 2 screwdrivers.
♦
Undo body nuts and bolts. Remove ball 200 from
the main body 101 by swivelling it.
♦
Press the stem 202 downwards into the body and
remove base ring 422 .
9.3.3 BVAP/F with actuator
♦
Mount actuator 850 with coupling 804 .
♦
Dismantle packing gland follower 503 and spring
gland follower 502 .
♦
Remove lantern 510 .
Further dismantling is performed as described in
Section 8.1.3 .
9.4 Assembly BVA/F, BVAP/F
with ball and stem
♦
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 .
♦
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 5.2 .
♦
Mount body end piece 102 . Tighten the greased
housing screws cross over with a tightening torque
according to
section 1.2 .
9.4.1 Packing insert
♦
Put base ring 422 onto the stem.
♦
Push the packing insert 423 with the thrust ring
405/1 into the packing chamber.
♦
Press in grounding spring washer 557 .
9.4.2 BVAF with lever
♦
Mount lever stop 577 , spring gland follower 502 (at
4" and 6" are 2 spring gland followers 502 ) and
packing gland follower 503 . Tighten packing nuts
until there is no gap between packing gland fol-
lower and spring gland follower. See
Sections
1.2, 9.4 and 9.5 .
♦
Seal any tapped bores still open with plugs.
♦
Mount lever 203 .