Dow Filmtec BW30-440i Reverse Osmosis (RO) Membrane

11,500 GPD industrial / commercial / replacement reverse osmosis (RO) membrane element

The Filmtec BW30-440i element is a high-productivity element combining the highest active membrane area in the industry with the high rejection BW30 membrane. It is designed to minimize capital expenses in high-purity industrial water applications without increasing operating flux.

  • Produces 10% more water compared to the Filmtec BW30-400 element at the same operating pressure and high rejection, enabling lower capital expense for new systems, or increased water production in an existing system.
  • Includes iLEC(tm) interlocking endcaps, which reduce system operating costs and the risk of o-ring leaks that can cause poor water quality.
  • Designed using an industry standard 1.125 inch ID permeate tube for interchangeability with other brackish water elements.
Specifications:
Membrane Type:Polyamide Thin-Film Composite (TFC)
Maximum Operating Temperature:113F (45C)
Maximum Operating Pressure:600 psi (41 bar)
Maximum Pressure Drop:15 psi (1.0 bar)
Maximum Feed Flow Rate:85 gpm (19 m3/hr)
pH Range, Continuous Operation:2-11***
pH Range, Short-Term Cleaning:1-13* (30min)
Maximum Feed Silt Density Index:5 SDI
Free Chlorine Tolerance:<0.1 ppm**
Permeate Flow Rate:11,500 GPD (43 m3/day)*
Stabilized Salt Rejection:99.5%
Filmtec BW30-440i Reverse Osmosis (RO) Membrane

*Permeate flow and salt rejection based on the following standard conditions: 2,000 ppm NaCl, 225 psi (15.5 bar), 77F (25C), pH 8 and 15% recovery. Flow rates for individual elements may vary but will be no more than 7% below the value shown.

**Under certain conditions, the presence of free chlorine and other oxidizing agents will cause premature membrane failure. Since oxidation damage is not covered under warranty, Dow recommends removing residual free chlorine by pretreatment prior to membrane exposure. Most RO systems have carbon pre-filters for this purpose.

***Maximum temperature for continuous operation above pH 10 is 95F (35C).

Note: Active surface area guaranteed +/-3%. Active area as stated by FilmTec is not comparable to nominal membrane area often stated by some manufacturers.

Dimensions:

   A: 40.0" (1,016mm)
   B: 40.5" (1,029mm)
   C: 7.9" (201mm)
   D: 1.125"ID (29mm)
Filmtec BW30-440i Size Chart

Individual elements with iLEC endcaps measure 40.5 inches (1,029 mm) in length (B). The net length (A) of the elements when connected is 40.0 inches (1,016 mm).

Model Diameter Inches Length Inches Active Surface
Area ft2 (m2)
Test Pressure Permeate Flow
Capacity
GPD (m3/day)
Price
(w/ Free Shipping)
Filmtec BW30-440i
Our Stock #703249107
Dow Part #249107
8.0 40 440 (41) 225 psi 11,500 (43)
Price: US$889.95

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.