Filmtec XLE-2521

Filmtec XLE-2521 membrane Small Commercial Elements These commercial membrane elements offer the highest quality water for small commercial systems purifying less than one gallon per minute (0.2 m3/d) of RO water.
Product name	XLE-2521
Part number	154530
Nominal Active Surface Area	13 (1.2) ft2 (m2)
Applied Pressure	100 (6.9) psig (bar)
Permeate Flow Rate	365 (1.4) gpd (m3/d)
Stabilized Salt Rejection	99.0 %
1. Permeate flow and salt rejection based on the following test conditions: 500 ppm NaCl feedstream, pressure specified above, 77°F (25°C) and the following recovery rates: XLE-2521, XLE-4021 – 8%; XLE-2540, XLE-4040 – 15%. 2. Permeate flow rates for individual elements may vary +/-20%. 3. For the purpose of improvement, specifications may be updated periodically.
Membrane Type	Polyamide Thin-Film Composite (Filmtech)
Maximum Operating Temperature	113°F (45°C)
Maximum Feed Flow Rate	6 (1.4) gpm (m3/h)
Maximum pressure drop	13 psig (0.9 bar)
pH Range, Continuous Operation	2-11
pH Range, Short Term Cleaning	1-13
Maximum Feed Silt Density Index	SDI 5
Free Chlorine Tolerance	< 0.1 ppm

Important Information:

Proper start-up of reverse osmosis water treatment systems is essential to prepare the membranes for operating service and to prevent membrane damage due to overfeeding or hydraulic shock. Following the proper start-up sequence also helps ensure that system operating parameters conform to design specifications so that system water quality and productivity goals can be achieved. Before initiating system start-up procedures, membrane pretreatment, loading of the membrane elements, instrument calibration and other system checks should be completed. Please refer to the application information literature entitled “Start-Up Sequence” (Form No. 609-02077) for more information.

Operation Guidelines:

Avoid any abrupt pressure or cross-flow variations on the spiral elements during start-up, shutdown, cleaning or other sequences to prevent possible membrane damage. During start-up, a gradual change from a standstill to operating state is recommended as follows: Feed pressure should be increased gradually over a 30-60 second time frame. Cross-flow velocity at set operating point should be achieved gradually over 15-20 seconds. Permeate obtained from first hour of operation should be discarded.

General Information:

Keep elements moist at all times after initial wetting. If operating limits and guidelines given in this bulletin are not strictly followed, the limited warranty will be null and void. To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution. The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements. Maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar). Avoid static permeate-side backpressure at all times.

Notice: The use of this product in and of itself does not necessarily guarantee the removal of cysts and pathogens from water. Effective cyst and pathogen reduction is dependent on the complete system design and on the operation and maintenance of the system. Notice: No freedom from any patent owned by Seller or others is to be inferred. Because use conditions and applicable laws may differ from one location to another and may change with time, Customer is responsible for determining whether products and the information in this document are appropriate for Customer’s use and for ensuring that Customer’s workplace and disposal practices are in compliance with applicable laws and other governmental enactments. Seller assumes no obligation or liability for the information in this document. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.

New FILMTEC™ XLE elements offer better system performance and economics by operating at very low applied pressure. XLE membrane, made with a patented technology, provides consistent and reliable system performance. And for added convenience, XLE elements are available in a dry state for rapid start-up (see Figure 1 on reverse). The new XLE series of elements replaces TW30LE elements which were made with an older membrane technology.

Lenntech can also help you with similar brackish and seawater filters or filtration systems for optimum water purification and liquid filtration. Also we can provide other Filmtec type replacement membranes
Please feel free to contact us for any information on reverse osmosis water filters.