45
Poor Product Water Quality
With any product water quality issue, you must ensure accurate calibration if you are
using a salinity meter. For general quality evaluation, your taste is always good
enough.
Membranes are not an exact science and two identical systems can have different
product quality. World health standards deem water of up to 1000 PPM of total dis-
solved solids acceptable for drinking. We consider any thing below 750 PPM accepta-
ble, and anything below 500 PPM excellent. Factors that could affect water quality are
addressed below.
LOW SYSTEM FLOW OR PRESSURE will equate to lower product quality (higher
PPM).
DAMAGE TO THE MEMBRANE by chlorine contamination. Flushing the system
with chlorinated water will irreparably damage the membrane. Charcoal filters
are used to absorb any chlorine which might be present in flush water. They
must be of proper specification to be suitable. There is no test for chlorine dam-
age except the process of elimination of other causes.
DIRTY OR SCALED membranes. A dirty (foreign material), scaled (mineral depos-
its), or contaminated (bacterial growth) membrane can result in poor water quali-
ty and abnormal operating pressures. If operating pressures are above normal,
then cleaning is indicated. If the system pressures are within normal operating
range, cleaning may have little result. Low water quality after storage with pro-
pylene glycol can usually be remedied by flushing with the pressure relief valve
for seral hours or if that is not effective a SC
-
2 cleaning.
MECHANICAL LEAKAGE within the membrane pressure vessel. This is an unlikely
but possible cause of poor water quality. A pinched or damaged O
-
ring within
the pressure vessel, a scratch on the product tube on the membrane, a scratch
within one of the end caps, or a seal fouled by contamination could allow sea
water into the product water.
Содержание LB-1800C
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