PAPER RECYCLING PLANTS - AR Thomson Group

Double seals will always out perform a single type mechanical seal when used in conjunction
with a pressurized (water) barrier fluid. This is because the internal seal faces are sealing water
not product. Double seals are used where maximum seal life is required and in these
instances a double seal will often outlast the normal life of the pump. Double seals are
additionally used in the most arduous duties i.e. where the pump is run outside its design duty
parameters, where there is high levels of air entrainment & prolonged dry running,
On pumping applications double seals should be specified where concentrations exceed 6%.
The preferred installation is the water management (W1 – W4) system, which provide the
necessary protection for the seal faces combined with minimum maintenance requirement.
The outboard faces of the double seals would use Carbon versus Chromium Oxide since the
buffer/barrier fluid is water.
ELASTOMERS
Without doubt AFLAS is the most popular elastomeric compound used in pulp and paper
plants, combining the resistance of EPR to hot water and Alkalis with the performance of Viton
on Acids and oils. AFLAS provides the user with a single solution for his plant and therefore
reduces the stock inventory required.
GASKETS
AF1 the standard AESSEAL ® gasket is suitable for all duties.
© Copyright 2002 AESSEAL plc All Rights Reserved.
RECCYCCLLEEDD PAAPEER
AESSEAL®
PAPER RECYCLING
PLANTS
L-UK/US-RECYCLE-03
IN 4540 - 01/2002
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