BW30-440i Brackish RO Membrane

Product Details

BW30-440i is a high rejection and high performance industry-standard brackish water reverse osmosis membrane element.

Membrane Type Polyamide Thin-Film Composite

• Maximum Operating Temperaturea 113°F (45°C)

• Maximum Operating Pressure 600 psig (41 bar)

• Maximum Pressure Drop 15 psig (1.0 bar)

• pH Range, Continuous Operationa 2 - 11

• pH Range, Short-Term Cleaning (30 min.)b 1 - 13

• Maximum Feed Flow 85 gpm (19 m3/hr)

• Maximum Feed Silt Density Index SDI 5

• Free Chlorine Tolerancec

 < 0.1 ppm a Maximum temperature for continuous operation above pH 10 is 95°F (35°C). b Refer to Cleaning Guidelines in specification sheet 609-23010. c 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. Please refer to technical bulletin 609-22010 for more information.

Typical Properties

1. Permeate flow and salt rejection based on the following standard conditions: 2,000 ppm NaCl, 225 psi (15.5 bar), 77°F (25°C), pH 8 and 15% recovery.

2. Flow rates for individual elements may vary but will be no more than 15% below the value shown.

3. Sales specifications may vary as design revisions take place.

4. Active area guaranteed +/-5%.