Richter BVAP/F Series Ball Valves (ASME) - Manual (Page 11)

Series BVA/F, BVAP/F ,
ASME Page 11
9520-085-en_USA Revision 10
TM 8361 Edition 10/2011
7 Malfunctions
Flange connection ball valve/pipe is leaking
Retighten the flange screws to a tightening torque
according to Section 1.2. If this does not remedy
the leak, the recommended torques may be ex-
ceeded by 10%.
If this also fails to stop the leak, dismantle and
inspect the ball valve.
Flange connection main body/body end piece is
leaking
Retighten body screws. See paragraph "Flange
connection valve/pipe is leaking".
Packing is leaking
Retighten packing nuts according to the details in
Section 1.2.
Ball valve does not operate
Is the actuator being supplied with power?
Is any directional control valve connected cor-
rectly?
Is there any foreign matter in the valve?
The ball no longer closes completely
Is the stem deformed?
Is the coupling worn?
With a worm gear or actuator, check whether the
end stops can be re-adjusted. The operating
manuals of the gear and actuator manufacturers
contain accurate instructions.
Never apply force to the lever or use an
extension.
1. Try to get the ball valve working again by
moving the lever to and from.
2. Remove the lever stop and try to switch against
the
normal direction of rotation.
3. If actuation is not possible with the max. admissi-
ble
breakaway torque as per Section 1.4, dismantle
ball valve and inspect individual
components.
8 Maintenance
All repair work is to be performed by qualified
personnel using the appropriate tools. Generally
recognized practice in mechanical engineering is
to be observed.
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 original spare parts may be installed.
To prevent leaks, a regular check of the connection
screws should be made in line with the operat-
ing requirements.
For torques see Section 1.2.
8.1 Dismantling BVA/F, BVAP/F
with ball/stem unit
8.1.1 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 100.
Remove body end piece 102.
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.
Remvoe base ring 422 from the ball/stem unit 201
and pull the unit out.
Remove seat rings 401.
8.1.2 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 8.1.1.