Series KA-N/F, KAP-N/F
Page
11
9520-017-en
Revision 15
TM 10477
Edition 05/2022
8
Malfunctions
♦
Flange connection 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 valve.
♦
Flange connection main body/body end piece is
leaking
Retighten body screws. See paragraph "Flange
connection ball 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 supplied with power?
Is any directional control valve correctly connect-
ed?
Is there 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 actuating torque as per
section 1.3
, dismantle
ball valve and inspect individual components.