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Home > Water Filter Brands > Filmtec Reverse Osmosis Membranes > FILMTEC-TW30-4021


Dow Filmtec TW30-4021 Commercial Reverse Osmosis Membranes

900 Gallons Per Day; 3.9" W X 21" L; Part # 80641

Dow Filmtec TW30-4021 Commercial Reverse Osmosis Membranes 900 Gallons Per Day RO Membrane Element
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Product Code: FILMTEC-TW30-4021
  • Dow Filmtec TW30-4021 Commercial Reverse Osmosis Membranes:
  • Dow Filmtec TW30-4021 commercial reverse osmosis (RO) elements offer the highest quality water for small commercial systems purifying less than one gallon per minute (0.2 m3/d) of RO water.
  • Dow Filmtec membranes also deliver savings by providing the industry’s longest lasting and most reliable performance.
  • Dow Filmtec Part # 80608
  • Dow Filmtec TW30-4021 Commcerial Reverse Osmosis Membrane Specs:
  • Dimensions: 3.9" W X 21" L
  • Maximum Operating Temperature: 113°F (45°C)
  • TW30-4021 Permeate Flow Rate gpd (m3/d): 900 gpd (3.4)
    (Permeate flow rates for individual elements may vary +/-20%.)
  • Maximum Operating Pressure: 600 psig (41 bar)
  • Maximum Pressure Drop: 13 psig (0.9 bar)
  • Stabilized Salt Rejection: 99.5%
  • Maximum Feed Silt Density Index (SDI): 5
  • 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 TW30-4021 Reverse Osmosis Membrane Materials of Construction:
  • Membrane Type: Polyamide Thin-Film Composite
  • Manufacturer: Filmtec TW30-4021
  • Dow Filmtec Commercial TW30-4021 Reverse Osmosis Systems:
  • The Dow Filmtec TW30-4021 Reverse Osmosis Membrane can be used in many brands of Commercial Reverse Osmosis Water Filtration Systems.
  • Dow Filmtec TW30-4021 Reverse Osmosis System Accessories:
  • Use a TDS Meter to monitor the Total Dissolved Solids before and after the Filmtec Commercial TW30-4021 Reverse Osmosis Membrane.
  • Use a Digital RO Tank Pressure Gauge to monitor the Reverse Osmosis Tank Pressure.
  • Dow Filmtec TW30-4021 Reverse Osmosis Membrane Instructions:
  • After installation of the Filmtec TW30-4021, the first full tank of permeate should be discarded. Do not use this initial permeate.
  • Proper start-up of reverse osmosis water treatment system is essential to prepare the TW30-4021 industrial membrane elements for operating service and to prevent membrane damage due to overfeeding or hydraulic shock.
  • Keep the TW30-4021 RO element moist at all times after initial wetting.
  • During prolonged system shutdowns, it is recommended that the Filmtec Dow TW30-4021 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 TW30-4021 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 30 psi (2.1 bar).

Quantity Unit Price
1 - 2 $272.99
3 - 5 $264.79
6+ $256.59
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