SWRO 8040 Low-Energy RO Membrane
SWRO 8040 low-energy seawater reverse osmosis membrane engineered to deliver similar productivity at lower operating pressure. Rated around 32,000 mg/L NaCl at 25 °C. Typical salt rejection up to 99.5% with a standard 1.125″ permeate tube for 8″ vessels.
Product Description
This 8.0″ × 40″ thin-film composite (TFC) RO membrane is designed for seawater systems that prioritize energy efficiency without compromising stable permeate quality. It is a drop-in replacement for standard 8040 pressure vessels and interconnectors, and includes clear operating limits, cleaning chemistry windows, and preservation guidance for dependable service life.
Key features
- Low-energy design achieves target flux at reduced feed pressure to help lower kWh per m³.
- Typical salt rejection up to 99.5% for dependable product conductivity.
- Balanced feed spacers support stable differential pressure and effective CIP.
- 1.125″ permeate tube ID; drop-in fit for multi-element 8040 vessels and couplers.
- Compatible with energy recovery devices (ERD) and staged SWRO arrays.
Interfaces & compatibility
- Format: 8040 TFC polyamide element
- Permeate tube: 1.125″ (28.6 mm)
- Housings/couplers: standard 8″ pressure vessels with interconnectors
- Change-out: replace like-for-like in most 8040 trains
Operating & cleaning limits*
- Max temperature: 45 °C (113 °F)
- pH range (operation): 2–11; (cleaning): 1–12
- Max pressure: 1,200 psi (8.3 MPa)
- Free chlorine: not recommended on TFC unless explicitly allowed by the datasheet; dechlorinate upstream
*Always verify final limits on the current model datasheet.
Typical test conditions
32,000 mg/L NaCl, 25 °C, reduced operating pressure versus HR types, and ~8% recovery. In service, performance depends on temperature, salinity, recovery, and pretreatment (SDI/MFI, antiscalant window).
What’s included
- Factory-preserved element in sealed bag
- Installation torque notes; cleaning & preservation guidance (download)
For field criteria, see RO membrane replacement, cleaning & CIP, and troubleshooting matrix.
Product Parameter
Technical Parameters
| Element size | 8.0″ × 40″ (8040) |
|---|---|
| Active area | ~37 m² (400 ft²), model dependent |
| Typical salt rejection | up to 99.5% (datasheet dependent) |
| Rated permeate flow (window) | ~34–38 m³/d (9,000–10,000 gpd) at reduced pressure |
| Permeate tube ID | 1.125″ (28.6 mm) |
| Max operating pressure | 1,200 psi (8.3 MPa) |
| Max temperature | 45 °C (113 °F) |
| pH range | 2–11 operation; 1–12 cleaning |
| Test conditions | 32,000 mg/L NaCl; 25 °C; reduced pressure; ~8% recovery |
Values shown are typical for listing; final selection should follow the current model datasheet.
Applicable Industry
- Municipal SWRO plants with energy-recovery devices
- Retrofits where pump head is limited or energy savings are targeted
- Coastal hotels, island resorts, and industrial SWRO requiring lower specific energy use
Advantage One
Advantage 1 — Lower pressure for the same output
The low-energy design helps achieve target flux at reduced feed pressure, supporting lower specific energy consumption and potentially extending high-pressure pump life when operated within recommended windows.Advantage TWO
Advantage 2 — Drop-in 8040 compatibility
Standard 1.125″ permeate tube and multi-element vessel coupling enable quick change-outs. Acceptance after start-up is straightforward: normalized permeate flow near the clean baseline, rejection on spec, and stage ΔP within limits.Related Products
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FAQ
Q1: How long does the reverse osmosis system last?
The lifespan of a reverse osmosis system depends on water quality and maintenance. Typically, the membrane lasts 2–3 years, while the system itself can last over 10 years with proper care.
Q2: Can the system be customized based on different water conditions?
Yes, all our systems are fully customizable. We analyze your water report and application needs before providing tailored solutions.
Q3: What standards does STARK equipment comply with?
Our products comply with CE, ISO 9001, and can be designed to meet specific regional regulations or industry standards upon request.
Q4: What is the delivery time for STARK RO systems?
Standard systems are shipped within 7–15 days. For customized orders, lead time may extend to 20–25 days depending on complexity.
Q5: Do you provide technical support or installation guidance?
Yes. We provide full technical documentation, remote guidance via video, and can dispatch engineers internationally upon request.
Q6: What is included in your quotation?
Our quotation includes the full RO system, control panel, pumps, pre-treatment units, and all necessary fittings. Installation tools and spare parts can be included upon request.