Richter BVAP/F Series Ball Valves (ASME) - Manual (Page 12)

Series BVA/F, BVAP/F ,
ASME Page 12
9520-085-en_USA Revision 10
TM 8361 Edition 10/2011
8.2 Assembly BVA/F, BVAP/F
with ball/stem unit
Prior to assembly all parts are to be cleaned and
the plastic-lined components checked for dam-
age.
Insert seat rings 401 in the main body 101 and
body end piece 102.
Mount ball/stem unit 201 in closed position. Make
sure that the packing chamber is not damaged.
A relief bore in the ball/stem unit must lie on the
p1 side in the closed position.
Mount body end piece 102. Tighten the body
screws to a tightening torque according to Sec-
tion 1.2 in diametrically opposite sequence.
8.2.1 Packing insert
Push the base ring 422 onto the stem into the
packing chamber.
Push the packing insert 423 with the thrust ring
405/1 into the packing chamber.
Press in grounding spring washer 557.
8.2.2 BVA/F with lever
Mount lever stop 577, spring gland follower 502
(at 3", 4" and 6" are 2 spring gland followers) and
packing gland follower 503. Tighten packing nuts
until there is no gap between packing gland
follower and spring gland follower. See Sections
1.2, 9.4 and 9.5
Seal any tapped bores still open with plugs.
Mount lever 203.
8.2.3 BVAP/F with actuator
Mount spring gland follower 502 (at 3", 4" and 6"
are 2 spring gland followers) and packing gland
follower 503. Tighten packing nuts until there is
no gap between packing gland follower and
spring gland follower. See Sections 1.2, 9.6 and
9.8.
Mount bracket 510 with the opening at right
angles to the direction of flow.
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.
8.3 Dismantling BVA/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.
8.3.1 Partial assembly ball and seat rings
Move ball 200 into the 'closed' position.
Relieve the packing gland follower 503 by
undoiing 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.
8.3.2 Packing insert and stem
Move ball 200 into the 'closed' position.
Remove lever 203.
Dismantle packing gland follower 503 and spring
gland follower 502.
Remove 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 housing screws. Remvoe ball 200 by
swivelling it out of the main body 101.
Press the stem 202 downwards into thge body and
remove base ring 422.
8.3.3 BVAP/F 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 8.3.1.