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Do not tighten a component into permeate port more than one turn past hand tight.
DO NOT PRESSURIZE THE VESSEL WITHOUT ELEMENTS INSTALLED.
Do not pressurize vessel until verifying that the Head Retaining Ring is properly installed.
Step 5. Reconnect Permeate Piping
1. Reconnect manifold piping to the vessel.
Using teflon tape or anaerobic sealant on all
threaded connections will help ensure a leak-
free assembly.
Step 6. PRE_PRESSURIZATION CHECKS
It is vitally important that the following checks be
carried out before any attempt is made to
pressurize the vessel.
It is recommended that the Pre-Pressurization
Checklist (Page-05) be used to systematically
verify that all steps have been performed.
HEAD ASSEMBLY
Verify the following at each end of the vessel:
1. Head assembly is in good condition, with no
evidence of damage or corrosion. See the
sections
on
Maintenance.
2. Port nut is snug (left-hand thread).
3. Head retaining Ring is properly placed.
MEMBRANE ELEMENTS
Verify that...
1. Elements are installed in the vessel.
2. Element adapters are installed at each end of
the vessel.
3. Thrust ring is installed at downstream end of
the vessel.
CLOSING THE VESSEL
Head
Rebuilding
CAUTION
PIPING CONNECTIONS
1. Check all piping connections to ensure
that they will provide a leak-free seal.
Step 7. Pressurization
1. After
pressurization checks, pressurize vessel
in
manufacturer's specifications.
2. Vessels should be filled slowly to assist
trapped air in escaping.
3. Vessels should be pressurized slowly to
avoid damage to membrane elements
and vessel components.
and
following
the
above
accordance
with
pre-
element
Page 17 of 38
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