2.0 Installation
2.3
Work Tubes and Fittings
Tubes of various diameters and
lengths may be fitted.
Type C: minimum length for the
product.
Type D: 400 mm longer than C, to
allow for the fitting of end seals.
A pair of removable 'end adaptors' form part of the end insulation. These may be blank
(no hole) or may have a hole to suit a work tube, depending on the customer order.
Additional adaptors may be ordered to suit different work tube sizes. Check that the end
adaptors are correct for the tube: if not, seek advice from Carbolite Gero. Small
alterations to the hole in the adaptors may be made with a file, but first read the section
on ceramic fibre safety 7.2. To insert a work tube it is often convenient to use a long
pole (such as a broom handle) to guide it into the far end of the product.
For optimum temperature uniformity, insulating plugs should be placed in the tube ends
as shown in fig.1. With a long work tube, the stem of the plug assembly should line up
with the end of the tube as in fig.2. Alignment of radiation shields is similar to that of
plugs.
If stainless steel seals with gas inlets are supplied, they are to be fitted as shown in
fig.3; the stem of any insulating plug should touch the seal.
Horizontal use: if heavy fittings are to be clamped to the end of an extended work tube
they can increase the bending stress at the centre of the tube. Support such fittings in
such a way that expansion of the tube is allowed. A horizontal tube support kit can be
supplied for this purpose.
If a metal work tube is being used in the product, ensure that it is earthed. See the
"Safety Warning" under "Operator Safety".
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