Seawater RO Membrane Elements
Specifically engineered to treat high-salinity seawater and brackish sources.
8040 and 4040 seawater elements (SWRO)
Hi-Tech seawater membranes are spiral-wound thin-film composite elements in the two industry-standard formats: 8040 (8" × 40") for desalination trains and 4040 (4" × 40") for marine and small SWRO systems. High-rejection grades hold up to 99.8% salt rejection at 32,000 ppm NaCl and 800 psi (55.2 bar) test conditions. Every element ships vacuum integrity tested, with a serial number and datasheet.
Mastering Salinity
Indispensable for desalination plants, coastal facilities, and offshore applications. These Hi-Tech membrane elements deliver an extraordinarily high rejection performance (up to 99.8%) while maintaining operational efficiency under extreme saline conditions.
Salt Rejection
Ready
High Rejection & Fouling Resistant
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- Active Area ft² (m²)
- 82 (7.6)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 1600 (6.1)
- Salt Rejection %
- 99.7%
- Feed Spacer mil
- 34
- Active Area ft² (m²)
- 400 (37.2)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 7400 (28.0)
- Salt Rejection %
- 99.8%
- Feed Spacer mil
- 34
Testing conditions: 32000 ppm NaCl, 25°C (77°F), 800 psi (55.2 bar), pH 7 (± 1.0), Recovery 8%
High Rejection
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- Active Area ft² (m²)
- 82 (7.6)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 1320 (5.0)
- Salt Rejection %
- 99.7%
- Feed Spacer mil
- 28
- Active Area ft² (m²)
- 400 (37.2)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 6500 (24.6)
- Salt Rejection %
- 99.8%
- Feed Spacer mil
- 28
Testing conditions: 32000 ppm NaCl, 25°C (77°F), 800 psi (55.2 bar), pH 7 (± 1.0), Recovery 8%
High Rejection & Low Energy
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- Active Area ft² (m²)
- 28 (2.6)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 680 (2.6)
- Salt Rejection %
- 99.6%
- Feed Spacer mil
- 28
Testing conditions: 32000 ppm NaCl, 25°C (77°F), 800 psi (55.2 bar), pH 7 (± 1.0), Recovery 8%
Extra Low Energy
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- Active Area ft² (m²)
- 82 (7.6)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 1660 (6.3)
- Salt Rejection %
- 99.6%
- Feed Spacer mil
- 28
- Active Area ft² (m²)
- 400 (37.2)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 9000 (34.1)
- Salt Rejection %
- 99.8%
- Feed Spacer mil
- 28
Testing conditions: 32000 ppm NaCl, 25°C (77°F), 800 psi (55.2 bar), pH 7 (± 1.0), Recovery 8%
Parallel-Channel — Seawater · ZLD · DTRO Replacement
A spiral-wound parallel open-channel element engineered as a drop-in replacement for DTRO (disc-tube) vessels — rated to 1800 psi (120 bar) for seawater desalination, Zero Liquid Discharge, and high-TDS brine concentration, with high fouling resistance and low pressure drop.
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- Active Area ft² (m²)
- 365 (33.9)
- Operating Pressure psi (bar)
- 800 (55.2)
- Permeate Flow GPD (m³/d)
- 4755 (18.0)
- Salt Rejection %
- 99.5%
- Feed Spacer mil
- 34
Testing conditions: 32,000 ppm NaCl, 25°C (77°F), 800 psi (55.2 bar), pH 8, Recovery 8%
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