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Biological
Growth on Membranes:
Storage, Shipping, and System Shut-Down.
By: Gil K. Dhawan Ph.D. P.E.,
Applied Membranes, Inc.
Note: Click Italicized
Underlined words for product information.
Membrane Storage
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Store membranes in a cool area out of
direct sunlight. Membrane storage temperature limits are
22°F-113°F (-5.5°C to 45°C)
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Preserve in a solution of 2%
AM-88
20%
AM-225.
This will not prevent freezing below 32°F, but the crystals are soft
and the membrane is not damaged.
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Keep new elements in original packaging.
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Examine the preservative in preserved
elements every 3 months. If not clear, remove and re-preserve.
The pH of the preservative should not drop below 3.
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Storage time for preserved elements is 6
months to 1 year.
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Storage time for dry (new) elements is
unlimited, and these can withstand temperatures below 22°F.
Membrane Shipping
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Preserve the element in the plastic bag
using the recommended procedure. Make sure the plastic bag does
not leak and the element is properly identified.
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Make sure the preservative solution is
correctly labeled.
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Protect the element package from physical
damage.
System Shut-Down
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Clean the membranes in the system using
the cleaning procedure.
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Circulate the preservative solution.
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Shut down the system and close valves to
prevent air entering the system.
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Check preservative once a month.
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