Because the membranes need a low pressure drop for operation, the filter can be made very compact. That makes him ideally suited to the point of use.
In the ‘Dead End’ filtration technique (see Figure 1), the water flows from the outside to the inside. The filtered particles and bacteria remain in the porous membrane wall. Those affected the accumulated to be slowly. When the flow rate (Pressure flow) decreases, the filter must be replaced.
At the ‘Dead End’ filtration technique (see Fig. 1), the water flows from the outside inwards. The filtered particles and bacteria remain in the porous membrane wall. Which slips thereby slowly close. When the flow rate (flow rate) decreases, the filter must be replaced.
This technique we apply mainly in the Legionella Safe showers, in-line filters and faucet filters.
In the “Forward Flush Technique (see Figure 2), the membrane is streamed from the inside. The filtered particles, bacteria and viruses are kept on the inside. With this technique, it is possible to reverse the flow so that the filtered, pure water rinses the inside of the Membrane. The dirt is removed at the bottom.
The WaterShield membrane filters meets the highest standards purification. The Ultra-filtration membranes meet even the highest standards in the world. These are the U.S. EPA criteria for micro-biological water purifiers, nl> 6 log (99.9999%) for bacteria and> 4 log(99.9%) for viruses. (See also: The Importance of Safe Water).
There are wide and unpredictable variations in the nature and concentration of micro particles in water. As a result, the service life of a filter depends on local conditions, and the water may or may not be present by pre-filtration.
Figure 1 – Filtration at the end where it is needed.
Hollow Fiber by a unique blend of polymer and mineral components extremely hydrophilic and highly porous, including a consistent pore size in the separating layer. Thus a high flow rate guaranteed at a low pressure drop at both micro-and Ultrafiltration.
This Membrane added benefit of low energy filtration, this all leads to end result of low energy cost.
Internally smooth texture, 1mm diameter.
High flow at low pressure.
Permanently hydrophilic, with an inert surface, and which substances do not adsorb to the membrane is easy to clean.
Resistant to internal and external pressure between 1.5 to 25 Bars.
Resistant to disinfection with chlorine.
As the pores become smaller, there is more pressure at the filtration process in motion. Also the surface properties of the membrane play a major role. When a hydrophobic (water-repellent) surface will be more pressure than with a hydrophilic(water-attracting) surface.
Micro-filtration and ultra-filtration filter particles from the water. Nanofiltration and Reverse Osmosis change the chemical or ionic composition of the water, such as for example the removal of minerals.
The fabrication of the filters is based on the standard requirements of ISO 13485:2003 Medical devices, maintaining quality. The Regulatory requirements are according to Directive 93/42/EEC concerning medical devices.
The products WS2013PRO & WS2014PRO are individually tested to the good state of the membrane and the water resistance of the device to be ensure. The filters contain a bacterial component which resists the spreading of micro-organisms on the surface of the product; the risk of subsequent contamination reduces by 99%.
The product does not contain latex!