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linked with the percentage division of plate
counts in various sections.
! To ensure leak free operation in such
applications, it is even more important that
the plates contact well with each other. Well
contacting plates are far more resistant to the
concertina effect. Always tighten to full plate
contact.
The concertina effect at minimum
compressed dimension is always very small
and therefore the plate pack is more rigid
and robust against leakage.
Irrespective of new or old plates or a mix of
new and old plates, the plates must always
be compressed to full contact. Due to
tolerances the full plate contact is attained
between maximum and minimum
compressed pitch. Full plate contact is
indicated by rapidly raising compression
force. See illustration as an example.
Ì
!
Insufficient clamping force can cause
leaking.
Ì
!
For best rigidity of plate pack, tighten used
plates to the same dimension again.
Ì
!
Never over tighten without written consent
from APV as this can damage the flow plates.
Check the heat exchanger sealing before pipes
on the follower are connected.
After any changes, a hydraulic pressure test
should be made prior to operation of the unit.
We recommend a leak test at 1.1 x operating
pressure.
Содержание APV ParaFlow
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