KSB BOAX- B, Operating Instructions Manual

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9.2 Valve removal from piping and
actuator disconnecting
Identify the valve by identity plate.
Please check what is the relevant spare kit.
Place the disc at 10
°
opening.
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!lf 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 .
9.3 Spares, list of tools, Consummables
9.3.1 Spares
DN

200 : no kit
Use the relevant spare parts included in the liner kit or disc kit or
shaft kit. Please refer to leaflets.
All constitutive parts of kits must be replaced.
During the mounting /dismantling of the valve, the order of
operations given in § 8.4.1. must be respected to prevent injuries
and material damages.
During the tests, while closing and opening valves, care must be
taken that no operator interferes with the disc travel.
9.3.2 List of tools for mounting/dismantling
Pneumatic screwing machine, open ended spanner, ring spanner,
box spanner, screwdrivers, hammer, pneumatic polisher, wedges,
crow bar and silicon grease if authorized.
9.3.3 Consummables
Use only the grease SF enclosed in the kit (amlub). The use of
mechanical grease is strictly prohibited.
9.4 Valve disassembly and re- assembly
9.4.1 Valve disassembly
Remove the plug (916) or bottom (176) , the spring retaining ring
(932) if any.
Remove the anti blow - out screws (900.*) and gasket holder (559) if
any.
Extract the operating shaft (213) and lower shaft (210)
Remove the disc (550) and dismantle the liner (413)
Take care to prevent disc edge, liner and paint from any
damage.
Change O - rings 412.* using silicon grease. Put grease onto the
liner at shaft passages.
9.4.2 Valve re- assembly
Put in place the liner (413) into the body (100) so that shaft passages
are correctly aligned with the bores of the body.
Insert the disc (550) in open position and check correct alignment of
shaft passages.
Mount the shaft (210) with the ball (486) / keys (940.*) or spring
retaining ring (932), the washer (554) and screw (901.*) if any.
DN 250 to 600:
Check that the groove of the shaft and operating shaft are in front
of the anti blow
- out screws (900.1) and (900.2) as shown on the
drawing hereunder:
CORRECT WRONG
Mount the operating shaft (213) with keys (940.*) if any. Check the
correct indexation with the disc edge (550)
Adjust the anti blow - out screws (900.*)
Mount the plug (916) or bottom (176) and gasket holder (559) if any.
Valves with a bottom(176) must be put in a horizontal position to
adjust screw (904) which is to be locked with nut (920).
9.5 Test and re- installation
Reassemble the actuator (check the N or M position)
Open the valve at 10 ° opening.
Pull apart the pipeline flanges to allow valve insertion without
damaging the elastomer liner of the valve.
Connect the power supply if necessary.
Check that the valve can be fully operated by the actuator.
Connect the valve to the pipe and follow assembling instructions.