BW30-400

Summary

Product Identification

The FilmTec™BW30-400 is a high rejection, high surface area brackish water reverse osmosis (RO) element. It is a spiral-wound element featuring a polyamide thin-film composite membrane. It delivers high flow and high rejection, is not chlorinated during manufacturing, and may be cleaned over a wider pH range (pH 1-13) than other RO elements.

Typical Performance

Performance is based on standard conditions: 2,000 ppm NaCl, 225 psi (15.5 bar), 77°F (25°C), pH 8, and 15% recovery.

• Active area: 400 ft² (37 m²)
• Feed spacer thickness: 28 mil
• Permeate flow rate: 10,500 gpd (40 m³/d)
• Stabilized salt rejection: 99.5%
• Minimum salt rejection: 99.0%

Flow rates for individual elements may vary but will be no more than 15% below the value shown. Active area is guaranteed +/-3%.

Operating Limits

• Membrane Type: Polyamide Thin-Film Composite
• Maximum Operating Temperature: 113°F (45°C)
  • Maximum temperature for continuous operation above pH 10 is 95°F (35°C).
• Maximum Operating Pressure: 600 psig (41 bar)
• Maximum Pressure Drop (across element): 15 psig (1.0 bar)
• pH Range - Continuous Operation: 2 - 11
• pH Range - Short-Term Cleaning (30 min.): 1 - 13
• Maximum Feed Flow: 70 gpm (15.9 m³/hr)
• Maximum Feed Silt Density Index (SDI): 5
• Free Chlorine Tolerance: < 0.1 ppm

Mechanical / Hydraulic

• Element Dimensions (inches (mm)):
  • A: 40.0 (1,016)
  • B (ID): 1.125 (29)
  • C: 7.9 (201)
• Element to fit nominal 8.0-inch (203 mm) I.D. pressure vessel.
• Maximum pressure drop across an entire pressure vessel (housing): 50 psi (3.4 bar)

Operation Guidelines

• Avoid abrupt pressure or cross-flow variations during start-up, shutdown, cleaning, or other sequences.
• During start-up, gradually increase feed pressure over 30-60 seconds.
• Achieve cross-flow velocity gradually over 15-20 seconds.
• Keep elements moist at all times after initial wetting.
• To prevent biological growth during prolonged system shutdowns, immerse membrane elements in a preservative solution.
• Avoid static permeate-side backpressure at all times.

Important Considerations

• Proper start-up of RO systems is essential to prepare membranes for service and prevent damage.
• Membrane pretreatment, element loading, instrument calibration, and other system checks should be completed before start-up.
• Under certain conditions, free chlorine and other oxidizing agents will cause premature membrane failure. DuPont recommends removing residual free chlorine by pretreatment.
• The use of this product does not necessarily guarantee the removal of cysts and pathogens from water; effective removal depends on complete system design, operation, and maintenance.
• Permeate obtained from the first hour of operation should be discarded.
• The customer is fully responsible for the effects of incompatible chemicals and lubricants on elements.
• Operating limits and guidelines must be strictly followed, otherwise the FilmTec™Reverse Osmosis and Nanofiltration Three-Year Prorated Limited Warranty will be null and void.

Regulatory Note

This product may be subject to drinking water application restrictions in some countries; check the application status before use and sale.

---

Disclaimer: This summary is based on the provided text extract and may not include all figures, footnotes, or the latest revisions. For contractual data, refer to the official OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet