Bumblebee Linens

Ideal for: reverse osmosis plant managers and operators dealing with controlled pre-treatment waters and seeking consistency, high performance, long element life, increase productivity, higher water quality coupled with outstanding fouling resistance and reduced footprint installations.

With proven performance, DOW FILMTEC™ BW30HR-440i:
• Delivers high quality permeate water while minimizing CAPEX and OPEX
• Offers increased active area with the most effective cleaning performance, robustness and durability due to its widest cleaning pH range (1-13) and chemical tolerance and the support of Dow technical representatives
• Includes iLEC™ interlocking end caps, reducing system operating costs and the risk of

Product Type
Spiral-wound element with polyamide thin-film composite membrane

40 in x 7.9 in

Product Specifications

Flow Rate
Rejection (%)
(psig) (bar) (GPD) (m³/h)
12,650 48.0 99.7
  1. Permeate flow and salt (NaCl) rejection based on the following standard test conditions: 2,000 ppm NaCl, 225 psi (15.5 bar), 77°F (25°C), pH 8, 15% recovery.
  2. Flow rates for individual elements may vary but will be no more than ± 15%.
  3. Stabilized salt rejection is generally achieved within 24-48 hours of continuous use; depending upon feedwater characteristics and operating conditions.
  4. Sales specifications may vary as design revisions take place.
  5. Active area guaranteed ± 3%. Active area as stated by Dow Water & Process Solutions is not comparable to nominal membrane area often stated by some manufacturers. Measurement method described in Form No. 609-00434.

Operating and Cleaning Limits

Operating Temperature
Operating Pressure
Pressure Drop
pH Range,
Continuous Operation
pH Range,
Short-Term Cleaning (30 min.)
Maximum Feed
Silt Density
Index (SDI)
113°F (45°C) 600 psig (41 bar) 15 psig (1.0 bar) 2 – 11 1 – 13 SDI 5 < 0.1 ppm

• Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• Refer to Cleaning Guidelines in specification sheet 609-23010.
• 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 Water & Process Solutions recommends removing residual free chlorine by pretreatment prior to membrane exposure. Please refer to technical bulletin “Dechlorinating Feedwater” for more information.

Equivalent Products

Hydranautics: CPA5 MAX, CPA4
Toray: TM720D-440
GE: AG-440; AE-400