Dichtomatik, can provide
Kalrez perfluoroelastomer ‘O’
rings from the Dupont
Performance Polymers range.

DuPont Kalrez Spectrum
7090 seals, for example, are
aimed at applications needing
high hardness/higher
modulus properties. They
have extensive mechanical
properties including
compression set resistance
and seal force retention with
good responses to
temperature cycling effects
and RGD resistance. They are
well suited to combined static
and dynamic sealing,
especially where high
temperatures or extrusion
resistance are involved. A
working temperature of
325°C is possible, with short
excursions at a higher
temperature acceptable.

A recent installation was for
a trunnian mounted ball valve
used in gas cleaning/
sweetening processes.