APORIS - 13
8
Maintenance/Repair
8.1 Safety Instructions
Maintenance and repair work may only be carried out by skilled and qualified personnel.
For all maintenance and repair work, the safety instructions listed below and also the general notes in section 2 must be
observed. Always use suitable spare parts and tools, even in case of emergency, otherwise correct operation of the valves
cannot be assured.
8.2 Valve removal from piping and actuator disconnecting
Identify the valve by identity plate.
Place the disc at 10° from closing position so that the disc will not exceed from face to face.
The entire valve must be unpressurized and must have cooled down sufficiently so that the temperature of the
medium is lower than 60 °C, to prevent scalding.
Opening pressurized valves will cause danger to life and limb toxic or highly flammable substances or liquids whose
residues may cause corrosion by interaction with the air humidity were handled by the valve, then the valve should be
drained and flushed or vented. lf necessary, wear safety clothing and a face guard/mask. Depending on the installation
position, any liquid remaining in the valve may have to be removed.
Prior to possible transport, the valves must be flushed and drained carefully. lf you have any questions please contact your
KSB Sales Office.
lf actuators powered by an external source of energy (electric, pneumatic, hydraulic) need to be removed from the
valves or dismantled, the energy supply must be shut down prior to starting any repair work.
Remove the valve from the piping with its actuator
. Do not damage the liner during removal the valve from the pipe.
Therefore, pull apart the pipe flanges to allow sufficient clearance.
Identify the mounting position of the actuator
Disconnect the actuator and take care of all bolting parts
.
Before reassembling the actuator, please apply sealant joint between butterfly valve top flange and actuator
.
8.3 Inspection and Operation Intervals
The valve must be inspected at least once a year regarding its tightness, smooth operation and corrosion protection.
The disc seal, O-ring and gaskets must be replaced at any signal of wear or tear or whenever necessary in function of the
operating conditions and inspections reports.
Use always KSB original Spare parts
8.4 Spare parts
Use the relevant spare parts included in the kits. Please refer to leaflets.
All constitutive parts of kit and flange gaskets must be replaced.
During mounting / dismantling of the valve, the operations must be respected step by step as defined in section 8.5
to prevent injuries and material damages.
During the tests, closing and opening valves, care must be taken that no operator interferes with the disc travel.
8.5 Valve disassembly and re-assembly
See manual of maintenance reference:
Reference
Manual of maintenance
APORIS 16
8123.81
8.6 Cleaning and Lubrication
Whenever replacing the disc seal, O-rings and gaskets please remove any dirty or debris and apply approved lubricants for
application with drinking water according to the local regulations.
