Posts Tagged ‘reverse osmosis membranes’

Membranes, Filmtec Membranes, Hydranautics, Toray and Koch Membranes

Pure Aqua

DOW / FilmTec


Koch / Fluid Systems


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, to get more info visit Reverse Osmosis Systems..


Reverse Osmosis – Drinking Water Purification System

Reverse Osmosis, Water Filters and Water Purification Systems. Reverse osmosis separation technology is used to remove dissolved impurities from water through the use of a semi-permeable membrane. RO technology involves the reversal of flow through a membrane from a high salinity, or concentrated solution to the high purity

Reverse osmosis (RO), also known as hyper filtration, is used by our Commercial & Industrial Brackish Water & Seawater Reverse Osmosis Systems to purify water by removing salts and other impurities. It is also capable of rejecting bacteria, sugars, proteins, particles, dyes

Choosing a home water purification system Drinking water should be based on the contaminants in water supplies and other personal needs. Drinking water systems by reverse osmosis is effective. But now, because of chemical contaminants such as herbicides and pesticides, and traces of prescription drugs, which are no longer sufficient.

Reverse Osmosis (RO) removes only the things that are heavier or larger than the water molecules. They only do that when regular maintenance. Distillers remove the only things that have a high boiling point of water. Most synthetic chemicals will not be removed through either process.

If a reverse osmosis system to purify drinking water requires electricity to operate. RO creates gallons of wastewater. Therefore, it is a good choice from the standpoint of the environment. They are also less economical alternatives.

Unique source for your water purification needs:

Reverse Osmosis systems from Pure Aqua deliver high performance at the lowest life-cycle costs. Our pre-engineered systems are built with high-quality components designed specifically for water purification. They arrive at your facility ready to run with all filters, membranes, pumps, piping, controls and operating manuals.

We supply membrane elements, valves, filters, pumps, nanofiltration and ultrafiltration equipment and other components. Pure Aqua is also unique in design and operation of these units. We build the complete machine, but Pure Aqua, Inc. stock all major RO systems components, such as membrane elements, controls, filters and high pressure pumps.

Water Purification Systems