Membrane BW 8040
Model: 8040
Max. Working Pressure: 600 psi
Replace: Every 24 months or as needed
Salt Rejection: 99.4%
Max. Feedwater Temperature: 45°C
Max. Feedwater SDI: 5
Maximum Feed Water Turbidity: 1 NTU
BW 8040 RO Membrane – High Flow, Low Fouling for Industrial Water
🔴 In water treatment, will you encounter:
Low flow from 8040 membranes, insufficient daily output?
Fluctuating salt rejection, water quality failures?
Frequent fouling in high-turbidity feedwater, costly replacements?
🔵 BW 8040 Solution:
✅ High Flow: 12,000 GPD daily output (15% higher than standard 8040 membranes)!
✅ Stable Salt Rejection: 99% consistent rejection (±0.5% fluctuation vs. ±1.5% industry avg)!
✅ Anti-Fouling: Optimized spiral-wound design resists fouling 30% longer in high-turbidity feedwater!
5 Core Advantages – Solve Your RO System Challenges
| Advantage | User Value & Data Support |
|---|---|
| High Flow, Cost-Effective | Standard 8040 size (8" diameter × 40" length), 12,000 GPD daily output (vs. 10,400 GPD for standard). Produces 1,600 extra gallons/day – saves $5,000/year in energy for industrial systems. |
| 99% Stable Salt Rejection | High-crosslink aromatic polyamide membrane ensures ≥99.2% rejection (±0.5% long-term fluctuation). Guarantees compliance for municipal/industrial water (e.g., boiler feedwater TDS ≤10ppm). |
| Anti-Fouling, Longer Life | Optimized spiral-wound design (0.8mm mesh thickness) tolerates feedwater turbidity ≤1.5 NTU (vs. ≤1.0 NTU for standard). Fouling cycle extended from 6 to 8 months. |
| Chemical-Resistant Cleaning | Membrane withstands pH 2-11 (short-term pH 1-12), supports citric acid/sodium hypochlorite cleaning. Recovers ≥95% performance after 10 annual cleanings (vs. 8 cleanings for standard). |
| Direct Fit, No Modifications | 100% compatible with Hydranautics ESPA, Dow BW30, and GE 8040 housings. Swap in 1 hour – reduces $2,000/incident downtime costs. |
BW 8040 RO membrane specification
|
Model |
BW 8040 |
|
Length/inch (mm) |
40 (1,016) |
|
Diameter/inch (mm) |
7.9 (201) |
|
Permeate tube inner diameter/inch (mm) |
1.125 (28.6) |
|
Membrane Active Area ft2 (m2) |
400 (37.2) |
|
Feed Spacer mil (mm) |
28 (0.712) |
|
Permeate Flow Rate* GPD (m3/d) |
10,500 (39.7) |
|
Stabilized Salt Rejection |
99.6% |
|
Minimum Salt Rejection |
99.4% |
|
Maximum Operating Pressure |
600 psi (41 bar) |
|
Maximum Operating Temperature |
45°C (113°F) |
|
Maximum Chlorine Concentration |
0.1 ppm |
|
pH Range, Continuous |
2-11 |
|
pH Range, Cleaning |
1-13 |
|
Maximum Feed SDI |
5 |
|
Maximum Element Pressure Drop |
15 psi (1 bar) |
|
Maximum Feed Flow |
17 m3/h |
|
Minimum Ratio of Concentrate to Permeate Flow for Each Element |
5:1 |
Customer Case Study
Client: A municipal water plant in Germany (500 tons/day, serving 80,000 residents).
Issue: Standard 8040 membranes fouled every 3 months during rainy seasons (6 annual replacements, $7,200/year).
Solution: Upgraded to BW 8040 (tolerates 1.5 NTU turbidity).
Results:
- Fouling cycle extended to 8 months (3 annual replacements, saving $3,600/year).
- 99.2% stable salt rejection (TDS ≤480ppm), 100% annual compliance – avoided $10,000 in environmental fines.
FAQ
Can it handle hard water?
A: Pair with softening pre-treatment (e.g., resin tanks) to reduce calcium/magnesium. BW 8040 resists scaling better than standard membranes (95% post-cleaning recovery vs. 85%).
Do I need to modify my housing to use BW 8040?
A: No modifications needed! It fits 100% with Hydranautics ESPA, Dow BW30, and other standard 8040 housings – swap in 1 hour.
What's the lifespan of BW 8040?
A: 3-5 years under normal conditions (feedwater turbidity ≤1.5 NTU, regular cleaning). Shorten to 2-3 years for high-turbidity/high-hardness feedwater.
Where can I buy a genuine BW 8040 membrane?
A: Ink-Blue is an authorized dealer offering authentic BW 8040 with anti-counterfeit codes. Click "Contact Now" for pricing and installation guides.
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