WIKA LGG serie Betriebsanleitung Seite 21

7. Maintenance, repair and cleaning
Replacing mica shields with model LGG-M
CAUTION!
Physical injuries and damage to property and the
environment
Mount the mica shields carefully.
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The mica shieds should not exhibit any chips or cracks on
the wetted side
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Observe the alignment of the label "Water side"
Threaded studs:
5901165344A for 50X2/60X2
5901165444A for 80X2/90X2
Depressurise the vessel
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Close the lower and then the upper valve head
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Open the drain valve and allow the media to drain
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Loosen the nuts and lift up the pressure plate
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Remove the pressure plate, the mica shield, loose sealing parts and
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cushion
Clean the sealing face (do not use any sharp-edged tools)
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Should the contact surfaces be damaged, they must be sent back to
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the manufacturer for reconditioning
Insert a new sealing into the sealing face
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Insert the mica shields (label "Water side" shows in the direction of
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the liquid channel). Eventually place a spring sheet or cushion on the
mica shield package for thickness compensation.
Place the pressure plate over the mica shield and centre
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Carry out the mounting as described in chapter 5.2 "Mounting of
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models LGG-R, LGG-T, LGG-M"
Seat the cover back via the threaded studs
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Carry out the leak test
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Operating instructions glass level gauge, model LGG
Sealing
Nut:
D025108016
Pressure plate
Pressure frame
Mica shield or mica
bundle
21
EN