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Series
BVA/F, BVAP/F to ASME
9
Maintenance
♦ All repair work is to be performed by qualified
personnel using the appropriate tools.
♦ For the arrangement, designation and item
numbers of all parts of the valve, see Section 9.
♦ Spare parts are to be ordered with all the details
in acc. with the valve identification.
♦ Only use original spare parts.
♦ To prevent leaks, a regular check of the connec-
tion screws should be made in line with the oper-
ating requirements.
♦ For tightening torques, see Section 1.2.
9.1
Dismantling
9.1.1 BVA/F with lever
♦ Move the ball/stem unit 201 into the closed
position.
♦ Remove lever 203.
♦ Take out grounding spring washer 557.
♦ Dismantle packing gland follower 503 and spring
gland follower 502.
♦ The thrust ring 405/1 and packing insert 423 are
one unit and it is levered out using 2 screwdrivers.
♦ Undo screw connection body end piece 102 /
main body 101.
♦ Pull the ball/stem unit 201 partially out, the base
ring 422 is pressed upwards. The ball/stem unit
must be in the closed position.
♦ The base ring 422 can now be pushed further up
using an angled Allen key. Make sure that the
packing chamber is not damaged.
♦ Remove base ring 422 from the ball/stem unit 201
and pull the unit out.
♦ Remove seat rings 401.
9.1.2 Ball valve 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 8.1.1.
9520-036-en
Revision 19
TM 10477
Edition
05/2022
9.2
Assembly BVA/F, BVAP/F
with ball/stem unit
♦ 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.
♦ 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 greased
housing screws cross over with a tightening torque
according to section 1.2.
9.2.1 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.
9.2.2 BVA/F with lever
♦ Mount lever stop 577, spring gland follower 502 (at
4" and 6" are 2 spring gland followers) and pack-
ing 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.
9.2.3 BVAP/F with actuator
♦ Mount spring gland follower 502 (at 4" and 6" are
2 spring gland followers) and packing gland fol-
lower 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 actua-
tor operating manual.
♦ Observe the ball/stem position in accordance with
the position of the actuator.
Page 11
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