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Read all guidelines in this section before attempting to close the vessel.
CHECK THE HEAD ASSEMBLY FOR CORROSION AS DESCRIBED IN THE HEAD REBUILDING
SECTION. CORRODED PARTS CAN RESULT IN CATASTROPHIC FAILURE.
Do not pressurize vessel until after visual inspection to ensure that retaining ring is fully seated.
Preliminary Steps
Do not proceed until...
1. Elements and adapters have been installed
in
the
vessel
"Replacing the Elements" section.
2. Head
has
been
component assembly by following step-by-
step instructions in the Head Rebuilding
section.
3. Vessel has been shimmed to prevent
movement of the membrane elements if
required. See Trouble Shooting section for
a description of when shimming is required.
Step 1. Inspect Shell Inside Surface
1. Inspect the vessel inside surface for any
corrosion
deposits
matter. If any are found, clean the
surface as follows:
Cleaning inside the vessel
CLOSING THE VESSEL
Never attempt to repair a fiberglass shell.
following
guidelines
checked
for
correct
or
other
foreign
WARNING
Using
a
ScotchBrite
clean each end of the vessel inner surface
upto 8" from each end of the vessel.
in
Rinse away all loosened deposits from the
shell inside surface using clean fresh water.
2. Inspect the vessel inside surface for
scratches or other damage that could
cause leaks. Vessels that leak must be
replaced.
Step 2. Shell & Head Lubrication
1. Work O-ring lubricant into shell area
behind the retaining ring groove and
approximately ½" into the vessel I.D.
2. Ensure entire head seal is covered with
a thin layer of O-ring lubricant, with no
dirt or dust contamination.
Any remaining lubricant should be
cleaned from the vessel bore before
applying fresh lubricant. Glycerine is a
commercially available lubricant that
medium
or
finer
TM
and a mild soap solution,
WARNING
will not foul membranes.
grade
of
Page 15 of 38
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