The DOW FILMTEC LC HR-4040 product range are available to meet a wide variety of customer needs in commercial applications, from producing high purity water to delivering low total system costs. Dow’s fully automated element production enables the most consistent products in the industry that minimizes the total cost of ownership of water treatment systems. DOW FILMTEC LC HR-4040 in a high rejection element that produces high quality water with our state of the art RO membrane.
- High rejection results in excellent water quality
- Reduced downstream polishing required
- durable with good cleanability for long element life
- Filmtec Performance and quality
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.
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.
- Keep elements moist at all times after initial wetting.
- If operating limits and guidelines given in this Product Bulletin are not strictly followed, the limited warranty in Form No. 609-35010 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.
|Product||Part Number Dry (Wet)||Feed Spacer Thickness (mil)||Permeate Flow Rate gpd (m3/d)||Min. Salt Rejection (%)||Stabilized Salt Rejection (%)|
|LC HR-4040||343771/(343770)||28||2900 (11)||99.5||99.7|
DOW FILMTEC™ LC 4040 product range are available to meet a wide variety of customer needs in commercial applications, from producing high purity water to delivering low total system costs. Dow’s fully automated element production enables the most consistent products in the industry that minimizes the total cost of ownership of water treatment systems.
- LC HR-4040 produces high quality water with our state of the art RO membrane.
- LC LE-4040 delivers high quality water at low pressure at harsh water conditions, using Dow’s innovative, proprietary technology for low energy applications.
- Membrane type Polyamide Thin-Film Composite
- Maximum operating temperature 113°F (45°C)
- Maximum operating pressure 600 psig (41 bar)
- Maximum pressure drop 15 psig (1.0 bar)
- Maximum feed flow rate, gpm (m3/h): 16 gpm (3.6 (m3/h))
- pH range, continuous operation 2 - 11
- pH range, short-term cleaning 1 – 13
- Maximum Feed Silt Density Index SDI 5
- Free chlorine concentration < 0.1 ppm
- Industrial water demineralization
- Production of municipal drinking water
- Water reuse
Nothing bad to say about these membranes whatsoever