Features:

• Dow Filmtec BW30-400 High Rejection, High Surface Area Brackish Water RO Membrane:
• The Dow Filmtec BW30-400 reverse osmosis membrane element is the product of choice when the highest quality permeate is required. It was the first 400 square foot membrane elements on the market and continues to be widely used in new equipment and retrofits where system capital and productivity are factors.
• Dow FilmTec's superior automated manufacturing technology results in the most consistent Dow BW30-400 performance element-to-element and year-after-year.
• The Filmtec BW30-400 elements deliver high flow and high rejection without being chlorinated during the manufacturing process. This is one reason why FILMTEC elements are more durable and may be cleaned over a wider pH range (pH 1 - 13) than other RO elements.
• Dow Filmtec Part # 98650

Specifications:

• Dow Filmtec BW30-400 Industrial Reverse Osmosis Membrane Specs:
• Dimensions: 8" W X 40" L
• Maximum Operating Temperature: 113°F (45°C)
  (Maximum temperature for continuous operation above pH 10 is 95°F (35°C).)
• BW30-400 Permeate Flow Rate gpd (m3/d): 10,500 (40)
  (Flow rates for individual elements may vary but will be no more than 15% below the value shown.)
• Maximum Operating Pressure: 600 psig (41 bar)
• Maximum Pressure Drop: 15 psig (1.0 bar)
• Stabalized Salt Rejection: 99.5%
• Minimum Salt Rejection: 99.0%
• Maximum Feed Silt Density Index (SDI): 5
• Maximum Feed Flow: 85 gpm (19 m3/hr)
• Free Chlorine Tolerance: <0.1 ppm
• pH Range, Continuous Operation: 2-11
  (Maximum temperature for continuous operation above pH 10 is 95°F (35°C))
• pH Range, Short Term Cleaning (30 min): 1-13

• Dow Filmtec BW30-400 Industrial Reverse Osmosis Membrane Materials of Construction:
• Membrane Type: Polyamide Thin-Film Composite

Instructions:

• Filmtec Dow BW30-400 Reverse Osmosis Membrane Instructions:
• Proper start-up of reverse osmosis water treatment system is essential to prepare the BW30-400 industrial membrane elements for operating service and to prevent membrane damage due to overfeeding or hydraulic shock.
• Keep the BW30-400 RO element moist at all times after initial wetting.
• During prolonged system shutdowns, it is recommended that the Filmtec BW30-400 membrane elements be immersed in a preservative solution. This is to prevent biological growth.
• Avoid any abrupt pressure or cross-flow variations on the spiral elements during shutdown, cleaning or other sequences to prevent possible BW30-400 Reverse Osmosis Membrane damage.
• During start-up, a gradual change from a standstill to operating state is recommended:
  - 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.
• Maximum pressure drop across an entire pressure vessel (housing) is 50 psi (3.4 bar).