What is the stable salt rejection rate of this membrane?

The SW-4040-HF membrane has a stable salt rejection rate of 99.7% under test conditions of 800 PSI pressure and 32000 ppm concentration.

What are the main applications for this seawater RO membrane?

It is suitable for seawater desalination, high-concentration brackish water desalination, boiler feedwater in power plants, wastewater reuse, and concentration of high-value-added substances in food and pharmaceuticals.

High Flow 4040 Reverse Osmosis Membrane for Seawater Filtration

Name: High Flow 4040 Reverse Osmosis Membrane for Seawater Filtration
Brand: Chongqing Aotong Environmental Protection Technology Co., Ltd.
SKU: 2157501452

Chongqing, ChinaChongqing Aotong Environmental Protection Technology Co., Ltd.

US$72.00

10-99 Pieces

US$69.00

100-199 Pieces

US$66.00

200-499 Pieces

US$64.00

500+ Pieces

Product specifications

Performance

Sample price:US$72.00/piece.Request sample

Product profile

Customization

Available

Membrane Type

Spiral

Type

Model NO.

Sw-4040-Hf

Effective Membrane Area

85(7.9) FT2(M2)

Model No.

Wl-Sw-4040-Hf

Application

Seawater Desalination,Concentration etc.

Size

3.9*40.0 Inch

Influent Concentration

32000 Ppm

Recovery Rate

Stable Salt Rejection Rate

99.7%

Flow Rate

1900 Gpd (7.2 M3/Day)

Keyword

Sea Water RO Membrane

Usage

Seawater Desalination,Concentration etc.

Material

Polyamides

Function

Reverse Osmosis System Part

Water Temperature

25℃

Test Pressure

800 Psi (5.5MPa)

pH Value

7.5

Transport Package

10 Pieces/Carton

Specification

99*1016 mm

Trademark

Walchin

Origin

Chongqing

HS Code

8421999090

Production Capacity

500000 Pieces/Year

Key features

High Salt Rejection: Achieves a stable salt rejection rate of 99.7% for effective seawater desalination.

High Permeate Flow: Delivers a permeate flow rate of 1900 GPD (7.2 m3/day) under standard test conditions.

Single-Stage Desalination: Enables obtaining drinking water from seawater through a single-stage reverse osmosis process.

Versatile Applications: Suitable for seawater desalination, high-concentration brackish water, and wastewater reuse.

Proven Durability: Typical lifespan of 2-3 years with regular cleaning and proper maintenance.

Quality Assurance: Guaranteed via pre-production samples and final inspection before shipment.

Customization Options: Offers customization from samples, full customization, and customization from designs.

Manufacturer Direct: Direct supply from Chongqing Aotun with 15 million sqm annual membrane sheet capacity.

Company profile

Self-brandedR&D Capabilities

Chongqing Aotong Environmental Protection Technology Co., Ltd.

Chongqing, China

CertifiedBusiness Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedNearest Port: Shanghai PortAverage Response Time: ≤24h CertifiedTerms of Payment: LC, D/P, T/T, etc.

AI-Powered supplier vetting

SummaryThe supplier is identified as a trading company located in Chongqing, with four production lines and stated RO membrane sheet output of 15,000,000 square meters. It supports sample-based, design-based, minor, and full customization and offers ODM services. Export sales account for 31%–40% of total sales, with export terms including FOB, CIF, CFR, and EXW. However, evidence shows weaknesses in documented service execution: procedures for supplier assessment, corrective actions, and complaint handling exist without written records. The supplier has no overseas warehouse, showroom, agent or branch, or offline trade-show participation. Innovation evidence is limited because no new products were reported in the past year and no SDK is available. Quality-control staffing and staff experience are either unavailable or reported as zero. Financial information provided for recent periods consists of zero values, making financial credibility difficult to establish.

Supplier typeThe supplier is explicitly classified as a trading company, located in Chongqing’s Kaizhou District, and associated with the scientific research and technical services industry. This establishes its registered business type but does not by itself confirm whether it owns or directly operates manufacturing facilities.

After-Sales capabilityThe supplier has procedures for service assessment, corrective and preventive actions, and complaint handling, but no written records are maintained for these processes. It has no overseas warehouse, showroom, overseas agent or branch, and offers services in zero overseas countries, limiting demonstrated international after-sales infrastructure.

Financial creditThe supplied financial records report zero operating revenue, operating cost, gross profit, operating profit, gross margin, and current ratio for the stated recent periods. These figures provide no positive evidence of operating financial strength and create a material basis for concern about financial credibility.

R&D capabilityThe supplier offers ODM services and customization through samples and designs, but reports no new products during the past year, no available SDK, and only one year of total R&D engineer experience. This indicates some design-related capability but limited demonstrated recent innovation.

Production capacityThe supplier reports four production lines and annual RO membrane sheet output of 15,000,000 square meters, with off-season lead time within 15 working days and peak-season fulfillment of one month. However, it does not conduct continuous quantity reconciliation for every batch or mass production, and quality-control staffing is unavailable, creating a production-control weakness.

Customization capabilityThe supplier explicitly supports customization from samples, full customization, customization from designs, and minor customization, and also provides ODM services. These stated capabilities directly support a broad range of customer-specific product development requirements.

Product Q&A

Q:What type of RO membrane is available in your company?

In general, Aotun has Household/Commercial RO membrane and Industrial RO membrane for optional.

Q:What is Salt Rejection Ratio?

The Salt rejection describes the quality of salt removed from the Reverse Osmosis feed water stream as a percentage. It's one of the key element of the RO membrane quality. Furthermore, other essential elements such as performance durability, stability, application scope in different region, and permeate flow rate at the same pressure will all be the important factors to judge the quality of the membrane.

Q:How often do RO membranes need to be replaced?

RO membranes typically last 2-3 years, but lifespan depends on water quality and maintenance. Regular cleaning extends membrane life.

Q:Is the Salt rejection of the RO membrane the higher the better?

This will be depending on the feed water quality, if the feed water quality is good, even a 90% salt rejection membrane will be workable, if the feed water is with bad quality and with brackish water environment, a higher salt rejection above 95% is an ideal choice. For any membrane that meet the local drinking water standard will be a good membrane.

Q:How can we guarantee quality?

Always a pre-production sample before mass production; Always final Inspection before shipment.