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-400/34i |
| 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 |
| End Cap Type | iLEC™ Interlocking End Caps |
| 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
- iLEC™ interlocking end caps reduce O-ring leak risks and lower operating costs
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: BW30-400/34i vs. BW30 PRO-400/34i
What happened to the FilmTec BW30-400/34i?
DuPont discontinued the original BW30-400/34i and replaced it with the FilmTec BW30 PRO-400/34i, the current-production successor in the same configuration.
What do “/34” and “i” mean?
“/34” denotes the 34-mil feed spacer for fouling-prone feeds. The “i” denotes iLEC™ interlocking end caps: elements lock directly to each other instead of relying on individual couplers and extra O-rings, which reduces O-ring leak points and permeate bypass, and makes vessel loading easier.
What is the difference between the old and PRO versions?
The PRO element is built on DuPont's current precision automated fabrication platform with the BW30 PRO family's tightened rejection specification. The original BW30-400/34i 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 active area, 34-mil spacer, iLEC interlocking end caps, polyamide TFC chemistry, 8″ × 40″ form factor.
Can I replace my BW30-400/34i with a BW30 PRO-400/34i 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.
