Igema TG32, Assembly And Operating Manual, Page: 18 / 28

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7.6 Cleaning the glass or mica shields
During first commissioning or re-commissioning of a boiler, oil and
grease residues can deposit on the inside of the glass/mica shields. In
such cases, close the drain valves (16, 17). Next wait until the gauge has
cooled down.
After the plug(s) (14) have been removed, the glass/mica shields and the
channel inside the gauge body can be cleaned with a circular brush.
Mica shields are a natural product and slight streaking and inclusions
may occur.This does not affect the safety of your gauge.
7.7 Replacing the glass or mica shields
As soon as the cover rails are removed, new glasses, mica screens and seals must
always be installed!
For safety reasons and to ensure full use of the indicator, glasses, mica and gaskets must
always be replaced annually. Without the annual replacement IGEMA will not accept any
warranty if this causes damage to the sealing surfaces of the indicator body.
7.7.1 Dismantling
Attention! Disassembly only when cold!
Close shutoff valves (A1, B1).
Open drain valve (18), unit will empty.
Wait until the gauge has completely cooled down.
Release nuts (1) from the cover rails (4) and remove together with the washers (2) and bolts
(3). Release the side set screws and carefully remove the cover rails. A flat head screwdriver
may have to be used at the side to loosen the cover rail by levering.
Take out the sealing used as padding (5), glass (6), mica shield (7) and sealing (8).
The sealing surface of the gauge body and the bearing surface of the cover rail must be freed
of sealing residue and cleaned.
Caution
hot!
Info
Caution
hot!