Richter KKP/FU Series Ball Valves (ISO/DIN) - Manual (Page 9)

Series KK/F, KKP/F, KK/FU, KKP/FU
Page 9
9520-060-en Revision 02
TM 7692 Edition 11/2009
7.3 Shutdown
The local regulations are to be observed when
dismantling the valve.
Prior to undoing the flange connection ensure, that the
plant is depressurised and emtied.
Prior to starting any repair work, the valve is
to be thoroughly cleaned. Even if the valve
has been properly emtied and rinsed,
residual medium may still be found in the valve,
After dismantling, immediately protect the valve
flanges against mechanical damage with flange caps.
See also Section 6.1.
8 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 body center piece/transition
cover 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 being supplied with power?
Is any directional control valve connected correct-
ly?
Is there any foreign matter in the ball 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 ma-
nuals 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 mov-
ing the lever to and fro.
2. Remove the lever stop and try to switch against
the normal direction of rotation.
3. If activation is not possible with the max. ad-
missible breakaway torque as per Section 1.3,
dismantle ball valve and inspect individual com-
ponents.
9 Maintenance
All repair work is to be performed by qualified
personnel using the appropriate tools. Generally
recognised practice in mechanical engineering is
to be observed.
For the arrangement, designation and item
numbers of all parts of the valve, see Section
10.
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 operating requirements.
For torques see Section 1.2.
9.1 Dismantling KK/F
9.1.1 Dismantling of seat ring and ball
Place ball valve on a soft, clean surface.
Undo cover holder 111.
Remove transition cover 109 and seat rings 401.
ATTENTION: Mark the inside and outside of the
transition cover with a felt-tip pen!
Move ball 200 into the "closed position" and
remove from the body centre piece 103 by lifting
and turning it.