Hydranautics SWC4-LD-4040 Seawater Reverse Osmosis Membrane Element
Hydranautics composite-polyamide spiral-wound elements deliver proven, reliable performance for seawater desalination and high-salinity water. The SWC4-LD-4040 is manufactured by Hydranautics, a Nitto Group company and a global leader in RO, NF and UF membranes.
📄 Download the Hydranautics Datasheet (PDF)
Performance Specifications
| Specification | Value |
|---|---|
| Manufacturer | Hydranautics (a Nitto Group Company) |
| Series | SWC |
| Element Size | 4" x 40" |
| Configuration | Low Fouling Spiral Wound |
| Membrane Polymer | Composite Polyamide |
| Active Membrane Area | Data sheet available on request |
| Permeate Flow Rate | Data sheet available on request |
| Salt / Nominal Rejection | Data sheet available on request |
| Minimum Rejection | 99.7% minimum |
| Feed Spacer | 34 mil (0.86 mm) |
| Shipping Weight | ~11 lbs (boxed) |
| Shipping Dimensions | 6" × 44" × 6" (boxed W × L × D) |
| HS Code (Tariff) | 8421.21.0000 — water filtering/purifying apparatus |
Operating & Limiting Conditions
| Parameter | Limit |
|---|---|
| Maximum Applied Pressure | 1200 psig (8.27 MPa) |
| Maximum Operating Temperature | 113 F (45 C) |
| Maximum Feed SDI | 5.0 |
| Free Chlorine Tolerance | < 0.1 ppm |
| pH Range — Operating | 2-11 |
| pH Range — Cleaning | 1-13 |
| Maximum Pressure Drop | 15 psi (0.10 MPa) |
Physical Dimensions
| Dimension | Value |
|---|---|
| Overall Length | 40.0 (1016) |
| Diameter | 7.89 (200) |
| Permeate Tube | 1.125 (28.6) |
| Fits Pressure Vessel | nominal 8-inch I.D. |
Performance based on Hydranautics standard test conditions: 32000 ppm NaCl solution, 800 psig (5.5 MPa) Applied Pressure, 77 F (25 C) Operating Temperature, 10% Permeate Recovery, 6.5 - 7.0 pH Range. Individual element flow may vary ±15%. Reference: official Hydranautics (membranes.com) datasheet.
Typical Applications
- Seawater reverse osmosis (SWRO) desalination
- Marine and offshore watermakers
- High-salinity industrial feed water
- High-recovery SWRO trains
Frequently Asked Questions
What is the Hydranautics SWC4-LD-4040?
The 4" x 40" seawater reverse osmosis element in the Hydranautics SWC4-LD low-fouling family. Ask us for the current Hydranautics data sheet for its rated flow and rejection.
What is the rated flow and rejection?
Supplied with the current Hydranautics data sheet for this 4-inch element; we do not publish a figure we cannot verify against the manufacturer (32000 ppm NaCl solution, 800 psig (5.5 MPa) Applied Pressure, 77 F (25 C) Operating Temperature, 10% Permeate Recovery, 6.5 - 7.0 pH Range).
What pressure vessel does it fit?
A nominal 8-inch I.D. RO pressure vessel.
What is the price of the SWC4-LD-4040?
Contact ForeverPure at 408-969-2688 or sales@foreverpureplace.com for current pricing and availability.
