Technical area
Chemical resistance
The choice of the exact elastomer is undoubtedly fundamental for a
successful seal One of the greatest problems in choosing the exact
elastomer to be used, is the conscientious assessment of the chemical resistance
to the various contact elements of the sealing system. It should also be
considered that it is often impossible to find a compound which satisfies all
the desired requirements of chemical resistance. It is therefore necessary to
reflect thoroughly on the choice of elastomer, having recourse to a sort of
compromise.
The basic chemical resistances must therefore be
precisely distinguished from the secondary ones to which the item to be
made will be submitted and the compound which is the nearest to the required
optimal characteristics must be chosen.
A Table of Chemical Resistance is
available to help choose. This table is the result of forty years of Fluorgum
experience and should always be referred to, taking into account the other basic
factors which could influence the seal, such as pressure, temperature,
squashing, etc.. Fluorgum standard compounds are usually resistant to an average
amount of chemical elements and satisfy most requirements of use.
It is
possible, however, to submit to our Sales Office specific requirements of
chemical resistance, even if they are not present in the relative table; the
office will check the feasibility of a compound with a specific formulation. In
this case it is indispensable to focalise the request on the most important
needs, neglecting or specifying as secondary the marginal
requirements.
Our Sales Office is also available for assessing special
requirements from the economic viewpoint, which cannot be ignored since the
choice of a special compound would undoubtedly influence this aspect.
Visualize in detail the
Principal table of the compounds