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Membranes, Filmtec Membranes, Hydranautics, Toray and Koch Membranes |
Membranes - Reverse Osmosis, Filmtec, Hydranautics and Koch Membranes
Crossflow membrane filtration is a pressure-driven
separation process. Application: Industrial, food,
water, chemical, and biotechnology markets, as well
as for those providing environmental protection.
Membranes serve as highly-engineered, physical barriers that permit the passage of materials only up to a certain size, shape or character. Pure Aqua offers reverse osmosis membranes, filmtec membranes, koch membranes, and Hydranautics membranes in a variety of configurations, materials and sizes; each designed to meet specific application needs
There are four main membrane separation processes
currently employed for liquid/liquid and liquid/solid
separation: microfiltration (MF), ultrafiltration
(UF), nanofiltration (NF) and reverse osmosis (RO).
Spiral wound products have become the most commonly
used membranes for industrial water applications
such as boiler make-up water, brackish water treatment,
seawater desalination, microelectronics and pharmaceutical
water applications. These membranes are available
as UF, NF and RO.
What is Semi-permeable Membrane?
Semi-permeable membrane refers to a membrane
that selectively allows certain species to pass
through it while retaining others. In actuality,
many species will pass through the membrane, but
at significantly different rates. In RO, the solvent
(water) passes through the membrane at a much faster
rate than the dissolved solids (salts). The net
effect is that a solute-solvent separation occurs,
with pure water being the product. (In some cases,
dewatering is desired to concentrate the salts).
What is Osmosis?
Osmosis is a natural process involving the fluid
flow of across a semi-permeable membrane barrier.
Consider a tank of pure water with a semi-permeable
membrane dividing it into two sides. Pure water
in contact with both sides of an ideal semi-permeable
membrane at equal pressure and temperature has no
net flow across the membrane because the chemical
potential is equal on both sides. If a soluble salt
is added on one side, the chemical potential of
this salt solution is reduced. Osmotic flow from
the pure water side across the membrane to the salt
solution side will occur until the equilibrium of
chemical potential is restored. In scientific terms,
the two sides of the tank have a difference in their
“chemical potentials,” and the solution equalizes,
by osmosis, its chemical potential throughout the
system. Equilibrium occurs when the hydrostatic
pressure differential resulting from the volume
changes on both sides is equal to the osmotic pressure.
The osmotic pressure is a solution property proportional
to the salt concentration and independent of the
membrane.
Pure Aqua, Inc. is a wholesalers’ of the reverse osmosis membranes, Hydranautics membranes, filmtec membranes (dow membranes), koch membranes, toray membranes
| ESPA |
Low Energy/High
Flow Tap & Brackish Water Thin Film
Membranes |
CPA |
High Rejection
Tap & Brackish Water Thin Film Membranes |
SWC |
Seawater
Membranes |
LFC |
Low Fouling
Membranes |
ESNA |
Nanofiltration
Membranes |
| Tapwater
Commercial RO |
2.5"x40”
and 4"x40” membranes, TW30, XLE,
LP, BW30, TW30HP |
Tapwater
Industrial RO |
4”x40”
and 8”x40” membranes, l BW30, BW30LE,
LE, XLE, FR, RO, HSRO |
Seawater
RO Elements |
2.5"x40”,
4”x40” and 8"x40” Seawater membranes,
SW30, SW30HR, SW30HRLE |
Nanofiltration
Elements |
4”x40”
and 8"x40” Nanofiltration membranes,
NF90, NF270, NF200, NF |
Semiconductor
Grade |
8"
Dia. Semiconductor SG, SG30 |
ULP |
Ultra
Low Pressure Elements for Tap &
Brackish Water Thin Film Membranes,
4040ULP, 4820ULP, 8821ULP, 8831ULP-575
magnum..etc. |
HR |
High Rejection
Tap & Brackish Water Thin Film Membranes,
8822HR-400, 8822HR-365, 4820HR, 4040HR,
ROGA8221HR …etc. |
SS |
Seawater
Membranes, 2540SWHF, 4021SW, 1820SW,
1820HF, 2822SS, ..etc. |
TMG10 |
Low Pressure
Brackish Water |
TM710,
TM720-365,
TM720-400 |
Brackish
Water |
TMG20-430,
TM720-430 |
Low Pressure
Brackish Water |
TM810,
TM820-370, M820-400 |
Seawater |
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