Product Overview
Water shortage and high-salinity water purification troubles marine vessels, offshore platforms, remote islands and coastal small industrial facilities worldwide. Ordinary brackish water RO membranes cannot adapt to the high osmotic pressure of seawater, resulting in reduced water production, rapid performance attenuation and frequent replacement. As a professional global supplier of industrial filtration and water treatment consumables, LEFILTER provides original DOW FILMTEC SW30-2521 seawater reverse osmosis membranes, delivering stable, efficient and cost-effective desalination solutions for small and medium-sized seawater treatment projects.
The SW30-2521 seawater RO membrane adopts advanced aromatic polyamide thin-film composite (TFC) technology, with a standard stabilized salt rejection rate of 99.4%. Its compact 2.5-inch diameter and 21-inch length design breaks the limitation of large-size membrane elements, perfectly matching mini seawater makers, laboratory high-salinity water treatment equipment and mobile emergency desalination devices. Compared with large 8-inch seawater membranes, this model has flexible installation, small floor space and adjustable water output, becoming the preferred core consumable for decentralized small-capacity seawater desalination projects.
All SW30-2521 membranes supplied by LEFILTER are genuine imported products with complete factory test reports, traceable batch codes and original packaging. We maintain sufficient spot inventory all year round, supporting small-batch trial orders and bulk wholesale, with fast global delivery. Relying on a complete product matrix of industrial RO membranes, we provide one-stop procurement services for global customers, covering seawater desalination, brine treatment, industrial ultrapure water preparation and saline wastewater purification.
Core Product Advantages
1. Ultra-High Salt Rejection, Comprehensive Impurity Interception
With premium thin-film composite material, the SW30-2521 achieves a stable salt rejection rate of 99.4%, far higher than ordinary industrial RO membranes. It can effectively intercept sodium chloride, magnesium salts and various dissolved minerals in seawater, as well as harmful substances such as heavy metal ions, bacteria, microorganisms, organic pollutants and suspended solids. It can purify raw seawater into standard drinking water, and also meet the discharge and reuse standards of coastal industrial saline wastewater, ensuring long-term stable water quality of the system.
2. High Pressure Resistance & Ultra-Low Failure Rate
Seawater desalination requires long-term high-pressure operation, which puts forward high requirements on membrane structural stability. The SW30-2521 is equipped with reinforced polyester backing and optimized spacer structure, resisting the maximum working pressure of 1000 PSI without deformation, delamination or leakage. The factory failure rate is controlled below 0.003%, avoiding frequent equipment failure and shutdown maintenance caused by inferior imitation membranes. It supports long-term continuous operation, greatly reducing later operation and maintenance costs.
3. Dry Membrane Design, Convenient Global Transportation & Storage
Different from traditional wet membranes filled with preservative solution, the original SW30-2521 adopts dry membrane preservation technology. It effectively reduces product weight and transportation volume, lowers international freight costs, and completely avoids the risk of preservative leakage during long-distance transportation. The unused dry membrane has a storage life of up to 1 year under normal warehouse conditions, allowing customers to stock up in advance according to project needs without performance attenuation.
4. Energy-Saving Operation, Flexible Application
The SW30-2521 has a rated water production of 300 GPD, meeting the daily fresh water demand of ships, island residences and small industrial sites. It supports flexible low-pressure adjustment according to actual raw water salinity. For medium-salinity seawater with TDS below 30000ppm, properly reducing the working pressure can save more than 20% of power consumption, effectively reducing the energy cost of offshore generator equipment, with no obvious impact on water production and water quality.
Application Scenarios
The SW30-2521 seawater RO membrane is widely used in global small-scale seawater desalination and high-salinity water treatment fields, compatible with all standard 2.5-inch FRP membrane housings, no need to modify existing equipment. Its main application scenarios include: ship and yacht on-board seawater desalination systems, remote island residential water supply equipment, coastal tourist area decentralized water purification devices, laboratory high-salinity water separation and testing equipment, small coastal factory saline wastewater pretreatment, and mobile emergency disaster relief desalination equipment.
LEFILTER Professional Service
As a reliable long-term supplier of original DOW RO membranes, LEFILTER provides full-cycle professional services for global customers. We offer free pre-sales technical consultation, raw water quality analysis and personalized model selection solutions. Sufficient spot stock ensures fast delivery within 3-7 working days. Each batch of products is accompanied by complete factory certificates, installation manuals and cleaning guidelines. Our professional engineering team provides remote online fault diagnosis and operation guidance at any time, helping customers solve various operational problems and extend the service life of membrane elements. We have established long-term cooperative relations with customers in more than 60 countries, relying on genuine product quality and thoughtful after-sales service to win widespread recognition.
FAQs About DOW SW30-2521 Seawater RO Membrane
Q1: What type of RO membrane is SW30-2521? What does the SW suffix mean?
A1: SW30-2521 is a professional seawater desalination RO membrane. SW is the abbreviation of Seawater, specially developed for high-salinity seawater and brine treatment. It is different from BW brackish water membranes and cannot be replaced by ordinary brackish water membranes in seawater purification systems.
Q2: What is the salt rejection rate of SW30-2521, and what impurities can it remove?
A2: The stabilized salt rejection rate of the original SW30-2521 reaches 99.4%. It can efficiently remove dissolved sea salt, heavy metal ions, bacteria, microorganisms, organic pollutants and suspended solids in seawater, producing qualified fresh water that meets international drinking water standards.
Q3: What are the advantages of the dry membrane design of SW30-2521?
A3: The dry membrane requires no preservative solution, reducing transportation weight and freight costs. It avoids liquid leakage risks in international shipping, supports 1-year long-term storage, and can quickly restore rated performance after installation with no quality loss.
Q4: What equipment is the SW30-2521 suitable for?
A4: It is perfectly adapted to all standard 2.5-inch membrane housings, mainly used for shipboard watermakers, island small water supply equipment, laboratory high-salinity water treatment and mobile emergency desalination devices, ideal for various small-scale seawater purification scenarios.
Q5: Is the SW30-2521 stable for long-term high-pressure operation?
A5: Very stable. The reinforced membrane structure resists long-term high-pressure seawater impact, with an ultra-low factory failure rate. It is not easy to delaminate or leak, effectively reducing system failure frequency and daily maintenance costs.
Q6: Can SW30-2521 operate at low pressure to save energy?
A6: Yes. For seawater with TDS below 30000ppm, adjusting to low-pressure operation can save over 20% of power consumption, greatly reducing the operating energy cost of ship and offshore power generation systems without affecting water purification effect.
Q7: What services does LEFILTER provide for SW30-2521 customers?
A7: We provide one-stop services including free technical consultation, model selection guidance, fast spot delivery, complete product certification documents, installation and cleaning tutorials, and 24/7 remote after-sales fault troubleshooting support.
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