WIKA LGG serie Betriebsanleitung Seite 20

7. Maintenance, repair and cleaning
Replacing the glasses for models LGG-T, LGG-R, LGG-E
EN
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 cover nuts and remove the cover
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Remove the glasses, loose sealing parts and cushion
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Clean the sealing face (do not use any sharp-edged tools)
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Insert a new sealing into the sealing face
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Insert the cushion with the glass into the cover
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Insert the reflecting glasses - grooves to show in the direction of the
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liquid channel
Ensure the correct alignment of the glasses to the cut-out
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Seat the cover back via the studs
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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"
Carry out the leak test
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Following successful repair, recommission the glass level gauge, see
chapter 5.4 "Commissioning".
Depending on the instrument version, glass level gauges with mica
shields or corrosion protection devices (FEP foil) must be placed in front
of or behind the glass.
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Body
Sealing face
Sealing
Corrosion protection or heat
protection from FEP foil or mica
Reflex glass
Cushion
Cover
Threaded studs
Cover nut
Operating instructions glass level gauge, model LGG
Transparent glass