BW30MAX-400/34i is the flagship high-flux component of the MAX brackish water reverse osmosis membrane product line, which can be matched with anti-fouling BW30FR-400/34i, heavy-duty HSRO brackish water desalination membrane and standard BW30 series membranes to build complete water treatment skids. Equipped with upgraded high-permeability separation layer and 34mil wide feed channel, this spiral-wound TFC membrane effectively cuts one-time equipment investment and daily operating expenses, outperforming traditional low-flux industrial RO elements. It can be perfectly combined with security filter cartridge and raw water softener to process medium and high SDI brackish well water, surface water and industrial reclaimed water. While stably outputting low-TDS permeate, it greatly decreases the number of pressure vessels required for large-scale desalination projects, realizing the core positioning of MAX series to save system costs.
BW30MAX-400/34i MAX Series High Flux RO Membrane Reducing Overall System Costs
BW30MAX-400/34i is the flagship high-flux component of the MAX brackish water reverse osmosis membrane product line, which can be matched with anti-fouling BW30FR-400/34i, heavy-duty HSRO brackish water desalination membrane and standard BW30 series membranes to build complete water treatment skids. Equipped with upgraded high-permeability separation layer and 34mil wide feed channel, this spiral-wound TFC membrane effectively cuts one-time equipment investment and daily operating expenses, outperforming traditional low-flux industrial RO elements. It can be perfectly combined with security filter cartridge and raw water softener to process medium and high SDI brackish well water, surface water and industrial reclaimed water. While stably outputting low-TDS permeate, it greatly decreases the number of pressure vessels required for large-scale desalination projects, realizing the core positioning of MAX series to save system costs
Product Description
Global water system integrators constantly seek brackish water desalination solutions with large water output and controllable overall costs, and BW30MAX-400/34i precisely fills this market demand as the core model of MAX high-flux RO membrane series. It is designed to solve the common industry pain point that conventional low-flux RO membranes require excessive membrane elements and oversized equipment racks. Different from medium-flux standard BW30 membranes and anti-fouling BW30FR-400/34i, this MAX model optimizes the molecular pore structure of polyamide separation layer to raise nominal water yield without compromising salt rejection performance, and it retains the 34mil wide feed spacer inherited from anti-fouling membrane products. The product features fully interchangeable dimensions with all mainstream 8-inch spiral wound RO supporting accessories, including FRP pressure vessels, brine seals and CIP online chemical cleaning devices. Most overseas engineering manufacturers assemble compact high-yield desalination systems by combining it with stacked security filter cartridge and multi-media pretreatment filters. Under the same effective membrane area, its enhanced flux capacity reduces the total number of membrane housings and high-pressure pumps under identical design water production standards, which is the core competitive advantage of the entire MAX product line. The modified hydrophilic polyamide active layer balances ultra-high throughput and basic anti-fouling performance, maintaining stable operation without rapid differential pressure rise when treating brackish raw water containing colloids and mild organic pollutants. Together with heavy-duty HSRO brackish water desalination membrane, it forms a complete product gradient to cover light, medium and complex raw water working conditions for diversified project selection.
Working Principle
BW30MAX-400/34i adopts the separation mechanism of thin-film composite spiral wound reverse osmosis, and all structural upgrades supporting its MAX high-flux feature focus on the nano polyamide separation layer and uniform membrane leaf distribution. Under rated operating pressure, brackish raw water circulates through the widened 34mil feed channel to carry away concentrated pollutants. The reoptimized dense polyamide active layer greatly reduces penetration resistance of water molecules, achieving faster permeation speed while completely intercepting dissolved inorganic salt ions. The newly upgraded membrane folding process eliminates local flux overload dead zones frequently seen on ordinary low-flux membranes, enabling all areas of the membrane surface to participate in water separation synchronously, which constitutes the core technical logic of MAX series high throughput design. The built-in iLEC interlocking end caps stop internal leakage between serially connected membrane elements, avoid permeate and concentrate cross-mixing that weakens overall water production efficiency, and sustain consistent high-flux water output inside multi-element membrane shells. During regular chemical cleaning cycles, the wide feed spacer cooperates with high-permeability membrane surface to accelerate dirt stripping, allowing the membrane to fully restore its original MAX high-flux index after each maintenance session.
Technical Features
1. Exclusive high-flux optimized polyamide separation layer for MAX series
Different from the fixed pore structure of standard brackish water RO membranes, this independently developed separation layer minimizes water permeation resistance, lifting nominal daily water output while retaining stable 99.6% salt rejection rate, serving as the unique technical symbol that distinguishes MAX series from conventional BW30 membrane products.
2. 34mil widened feed spacer customized for high-throughput operation
The thickened flow channel matches the larger raw water circulation volume brought by high flux, slows the accumulation rate of suspended particles and colloids, prevents rapid channel blockage under long-term full-load high-yield operation, and balances maximum water output and basic anti-fouling performance at the same time.
3. Full-area uniform flux distribution membrane leaf forming process
Revised membrane folding technology removes partial flux concentration areas; every segment of the membrane surface undertakes water separation evenly, prevents premature local fouling caused by excessive single-point water flow, and extends the continuous stable high-flux running cycle.
4. 1–13 ultra-wide pH cleaning window for rapid flux recovery
Compatible with full-spectrum acid and alkali cleaning agents used in industrial water treatment. After periodic chemical cleaning, the membrane can recover original MAX high-flux parameters without permanent water yield attenuation caused by incomplete dirt removal.
5. Standard 8040 specification with 400 sq.ft large effective membrane area
Unified global 8-inch industrial standard size, and 400 sq.ft complete membrane area provides sufficient filtration foundation for high-flux design. It is fully interchangeable with BW30FR and standard BW30 series elements without customized supporting equipment.
6. Stable operation under feed water SDI ≤5 to simplify pretreatment configuration
It can operate steadily with under-processed raw water including brackish well water and industrial reclaimed water. System designers may appropriately reduce the precision grade of front-end filters without damaging the long-term stable high-flux operation of the membrane.
Product Advantages
1. Cut overall system capital expenditure relying on MAX high-flux core performance
The core value of BW30MAX-400/34i lies in its improved single-element water production capacity. Under the same designed water yield standard, it reduces the total quantity of membrane elements, FRP pressure vessels and high-pressure pumps, shortens the length of RO equipment racks and lowers civil construction supporting costs, directly cutting the one-time purchasing investment of the whole brackish water desalination system.
2. Reduce long-term power consumption to lower daily operating costs
The low penetration resistance of MAX optimized membrane layer decreases the required system operating pressure and lightens the load of high-pressure pumps. For large-scale continuous water production projects, cumulative power savings throughout the full service life of the membrane generate remarkable long-term cost reduction benefits.
3. Compact skid layout cuts container and workshop space costs
High flux reduces the required number of membrane housings, shortening the overall length of reverse osmosis racks. The whole water treatment equipment occupies smaller container and factory workshop area, which is a prominent strength for containerized mobile desalination stations and small factory water rooms with limited site space.
4. Decrease spare parts inventory capital occupation for end customers
Less total membrane quantity means fewer spare membrane elements to reserve. Combined with full compatibility with universal BW30 series accessories, factory operators do not need to stock massive exclusive spare parts, easing capital pressure on spare parts storage.
5. Sustained stable high flux minimizes production downtime losses
Uniform flux distribution and wide feed spacer slow down fouling speed and extend the interval between two cleaning cycles, lowering the frequency of system shutdown. Manufacturing enterprises dependent on continuous pure water supply can avoid production suspension losses caused by frequent membrane cleaning, indirectly saving hidden operating expenses.
Application Fields
1. Municipal underground brackish water desalination and tap water softening projects
Suitable for township water plants extracting brackish well water to solve high-hardness and high-TDS tap water problems. When matched with multi-stage pretreatment equipment, it produces qualified domestic drinking water. Its high-flux cost-saving advantage is widely favored by engineering contractors in inland water-shortage areas of the Middle East and Southeast Asia.
2. Industrial wastewater zero liquid discharge (ZLD) recycling systems
It treats brackish intermediate wastewater discharged from chemical, textile and electroplating workshops, intercepts heavy metal ions and soluble organic matter to recover reusable process water, reduces factory raw water intake quota and wastewater discharge fees, and lowers the overall investment of ZLD equipment through fewer membrane configurations.
3. Primary desalination unit for boiler feed water in power plants
Used as the front-stage desalination equipment before mixed bed ion exchange, it removes most dissolved salts to reduce the regeneration frequency of ion exchange resin, extends resin service life and cuts acid-base regenerant consumption for thermal power and biomass power stations. The high-flux design shrinks the footprint of boiler water pretreatment workshops.
4. Process water purification for food and beverage manufacturing factories
It supplies low-TDS pure water for beverage blending, dairy processing and bottled water production. The wide pH cleaning range supports regular food-grade sanitization and complies with international water safety standards for food contact. The compact equipment layout helps food factories save production workshop space.
5. Underground brackish water treatment for mining and mineral processing plants
It handles high-silt underground raw water from metal mines. The 34mil loose feed spacer tolerates minor suspended solid leakage from front filters, adapting to remote mining sites with limited pretreatment maintenance conditions. Its high-flux characteristic reduces the total number of membrane racks in mining water treatment stations.
6. Centralized pure water supply stations for industrial manufacturing parks
It constructs large-scale centralized RO water supply facilities to meet unified pure water demand of electronics, plastic and pharmaceutical enterprises. It eliminates the need for independent small RO equipment for each factory, realizes centralized water treatment management, and greatly reduces the total investment of park water supply systems with high single-membrane flux.
FAQs
Q1: What core advantage does BW30MAX-400/34i own compared with ordinary BW30 standard RO membranes?
A1: As a member of MAX series, it adopts exclusive high-flux optimized separation layer. Under the same raw water and operating pressure, its single-element water yield is significantly higher, which can reduce the total number of membranes, pressure vessels and supporting pumps, thus cutting the overall construction cost of the whole water treatment system.
Q2: Is BW30MAX-400/34i interchangeable with BW30FR-400/34i on equipment?
A2: Yes, they share unified 8040 size and 34mil feed spacer structure, all pressure vessels, brine seals and pipelines are fully compatible. The difference lies in positioning: MAX focuses on high flux and cost saving, while FR series emphasizes heavy anti-fouling performance for severely polluted raw water.
Q3: What feed water SDI value can BW30MAX-400/34i stably adapt to?
A3: It can run continuously under feed water SDI ≤5. Compared with ultra-high flux thin-channel membranes with strict SDI≤3 requirements, it allows simplified pretreatment configuration and further reduces front-end equipment investment for project owners.
Q4: Can BW30MAX-400/34i maintain its original high-flux performance after long-term operation and cleaning?
A4: Its 1–13 wide pH cleaning window matches all mainstream industrial cleaning agents. Complete chemical cleaning can strip organic dirt and inorganic scale thoroughly, and the membrane can recover the nominal MAX high-flux index without permanent attenuation under standardized maintenance.
Q5: What kinds of projects are most suitable to select BW30MAX-400/34i to save system costs?
A5: Large-scale municipal brackish water plants, factory centralized pure water stations, containerized mobile desalination equipment and power plant boiler pretreatment systems with limited budget and fixed floor space are the best application scenarios for this high-flux cost-saving membrane.
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