B2B & Volume Sales — Call for Availability: 8″ membrane elements are sold business-to-business, typically by the case or in project quantities. Stock rotates quickly, so please call
+1 (408) 969-2688 or email
Sales@ForeverPure.com to confirm current availability, volume pricing, and lead time.
| SKU / Model | BW30-PRO-400/34 |
| Product Type | Brackish Water Reverse Osmosis Element |
| Membrane Type | Thin-Film Composite (TFC) |
| Active Area | 400 ft² (37 m²) |
| Permeate Flow Rate | 10,500 GPD (39.7 m³/d) |
| Stabilized Salt Rejection | 99.7% |
| Minimum Salt Rejection | 99.5% |
| Feed Spacer Thickness | 34 mil |
| Shipping Weight | ~44 lbs (boxed) |
| Shipping Dimensions | 10" × 44" × 10" (boxed W × L × D) |
| HS Code (Tariff) | 8421.21.0000 — water filtering/purifying apparatus |
| Warranty | 1-Year materials & workmanship; 3-Year prorated performance warranty from DuPont (commercial elements, per DuPont conditions) |
Operating Conditions
| Maximum Operating Pressure | 600 psi (41 bar) |
| Maximum Operating Temperature | 113°F (45°C) |
| Maximum Feed Flow Rate | 75 GPM (17 m³/h) |
| Maximum Pressure Drop | 15 psi (1.0 bar) |
| pH Range, Continuous Operation | 2 – 11 |
| pH Range, Short-Term Cleaning | 1 – 13 |
| Maximum Feed SDI | SDI 5 |
| Free Chlorine Tolerance | < 0.1 ppm |
Dimensions & Weight
| Element Diameter | 7.9 in (201 mm) |
| Element Length | 40.0 in (1,016 mm) |
| Weight (Dry) | 35 lb (16 kg) |
| Weight (Wet) | 42 lb (19 kg) |
Applications
- Industrial demineralization (Power Generation, Steel & Metal, Chemical & Petrochemical)
- Boiler feed water treatment
- Cooling tower make-up water
- Municipal drinking water production
- Food & beverage processing water
Key Advantages
- Delivers consistent water quality with higher rejection and flow than previous generation
- Based on proven FilmTec™ BW30 industry-standard RO membrane with decades of performance
- Outstanding durability for stable, long-term performance
- Enhanced fouling protection and reduced operating costs
- Enhanced fouling resistance with wider 34 mil feed spacer
Test Conditions: 2,000 ppm NaCl, 225 psi (15.5 bar), 77°F (25°C), pH 8, 15% recovery
Specifications provided by DuPont Water Solutions. Contact ForeverPure for pricing and availability.
Questions? Please contact us
Frequently Asked Questions: BW30-400/34 vs. BW30 PRO-400/34
What happened to the FilmTec BW30-400/34?
DuPont discontinued the original BW30-400/34 series and replaced it with the FilmTec BW30 PRO-400/34, the current-production successor in the same configuration.
What does the “/34” mean?
It denotes a 34-mil feed spacer — thicker than the 28-mil spacer in the standard BW30 PRO-400. The thicker spacer lessens the impact of fouling on pressure drop, making the /34 configuration the right choice for higher-fouling feeds, while keeping the full 400 ft² active area.
What is the difference between the old and PRO versions?
The PRO element is built on DuPont's current precision automated fabrication platform, delivering tighter element-to-element consistency and the BW30 PRO family's tightened rejection specification. The original BW30-400/34 was rated 10,500 GPD with 99.5% stabilized / 99.0% minimum rejection (2,000 ppm NaCl, 225 psi); refer to the current DuPont data sheet for the PRO element's exact figures.
What is the same on both elements?
400 ft² (37 m²) active area, 34-mil feed spacer, polyamide TFC chemistry, 8″ × 40″ form factor, and the same test basis.
Can I replace my BW30-400/34 with a BW30 PRO-400/34 without changing my system?
Yes — standard 8″ × 40″ element (1.125″ permeate tube), fits any standard 8-inch pressure vessel, 600 psig maximum operating pressure. No system modifications required.
