LF-SW High Pressure Seawater Reverse Osmosis Membrane Element 32000ppm Salt Tolerant

LF-SW series high-pressure RO membrane is dedicated Reverse Osmosis membrane developed for full-strength seawater with 32000ppm high salt concentration, this thickened pressure-resistant RO membrane element completely different from conventional brackish RO membrane filter such as BW and ULP series. Ordinary low-pressure Reverse Osmosis membrane element will suffer rapid compaction and performance decay under seawater high pressure, while LF-SW RO membrane adopts reinforced polyamide film to keep stable desalination rate long-term. Before seawater enters RO membrane element, full set pre-treatment including UF membrane and Ultrafiltration membrane module must be installed to intercept algae and suspended solids, reduce scaling risk of Reverse Osmosis membrane filter. All SW RO membrane products belong to Water Filter Element category, oil & gas coalescer cartridge and natural gas filter can be found via gas filter element.

Working Principle of LF-SW RO Membrane Element

High-salinity raw seawater flows tangentially over the surface of LF-SW RO membrane under 5.52–8.28MPa driving pressure. Reinforced thick polyamide layer of this Reverse Osmosis membrane only allows pure water molecules to penetrate into central permeate tube to form drinking water; sodium chloride, magnesium salt and marine microorganisms are fully trapped on membrane surface and discharged as concentrated brine. The widened feed spacer design of each RO membrane element slows salt crystal accumulation, extending chemical cleaning cycle of RO membrane filter compared with thin-channel common Reverse Osmosis membrane.

Main Technical Index

• Membrane Material: Thickened high-pressure polyamide for RO membrane filter

• Stable salt rejection of Reverse Osmosis membrane: ≥99.7%

• Max continuous operating pressure of RO membrane element: 8.28MPa

• Test raw water salinity: 32000ppm NaCl seawater for RO membrane

• Matching pre-treatment: all standard UF membrane module, Ultrafiltration membrane

Each LF-SW Reverse Osmosis membrane element passes high-pressure aging test before shipment, 4-inch small and 8-inch large two specifications for small island and large coastal desalination projects, compatible with standard high-pressure pressure vessels matched with High Flow Filter.

Four Core Product Advantages

1 Super High Salt Tolerance
This RO membrane element works stably under full seawater 32000ppm salinity, ordinary Reverse Osmosis membrane filter cannot match.

2 Reinforced Pressure Resistant Film
Thick substrate avoid membrane compaction under long-term high-pressure seawater running of RO membrane.

3 Anti-Scaling Wide Spacer
28mil wide flow channel reduces salt crystal adhesion on Reverse Osmosis membrane element.

4 Single-Stage Drinking Water Output
Qualified fresh water directly obtained without secondary desalination of RO membrane filter.

Application Scenarios

LF-SW RO membrane is core component of island fresh water equipment, offshore platform pure water system and coastal large-scale desalination plant, matched with Ultrafiltration membrane module as full pre-desalination solution. For brackish water Reverse Osmosis membrane element series, view related product link below.

Full LF-SW Series Complete Model List

LF-SW1-4021, LF-SW1-4040, LF-SW2-8040, LF-SW2-8040PRO, LF-SW3-2540

Other Related Products

&a href="https://www.le-filter.com/Water_Filter_Element/" target">BW Brackish Water RO Membrane

FAQ About LF-SW RO Membrane

Q1 What raw water fits this Reverse Osmosis membrane element?
A1 Exclusive for seawater and high-salinity brine over 30000ppm, not suitable for tap water RO membrane filter.

Q2 What is the maximum long-term working pressure of RO membrane?
A2 Continuous safe pressure up to 8.28MPa, much higher than standard brackish Reverse Osmosis membrane.

Q3 Is UF membrane module mandatory before SW membrane?
A3 Yes, algae and suspended solids in seawater will quickly foul RO membrane element without ultrafiltration pre-treatment.

Q4 Can LF-SW replace BW Reverse Osmosis membrane filter directly?
A2 Outer dimension consistent, but system high-pressure pump needs to be upgraded for seawater working condition.