The SpiroPure SP-SW2540 Seawater Desalination Commercial Reverse Osmosis Membrane Replacement 2.5 x 40 is a high quality, high salt rejection replacement membrane filter cartridge. The SP-SW2540 seawater ro membrane offers an extremely high salt rejection rate, making it the perfect choice for treating sea water and other high sodium applications. SpiroPure’s seawater filtration membranes are durable and reliable replacement seawater filters. Choose SpiroPure’s Seawater Desalination Membrane as a compatible replacement for the models listed below.
Sea Water Desalination RO Membrane Recovery Specifications:
- Nominal Size: 2.5" x 40"
- Certification: NSF 61 certified
- Salt Rejection Rate: 99.6%
- Average Permeate ±15%: 600 GPD @ 800 PSI
- Feedwater NaCl: 32,000 ppm
- Fresh Water Recovery Rate: 8%
- Feed Spacer: 28 mm
- Maximum Recommended NaCl: <40,000 ppm
- Maximum Operating Pressure 1,000 PSI
SP-SW2540 High Rejection Saltwater Filtration Membrane common applications:
- Seawater desalination
- Marine applications
- On-board watermakers for drinking water from seawater
- Watermaker RO Systems
- Yachts, boats, cruise ships, off-shore platforms, resorts
SW salt water/seawater membrane compatible model numbers:
- SE1-2540
- Dupont Filmtec SW30-2540
Additional Information
Seawater Membranes Are Shipped Wet
An important industry practice for seawater desalination RO membranes is to have them "shipped wet." After being tested to industry standards, our membranes are preserved for protection during shipping and for future use. The preservative is food-grade, and is found within the membrane itself and not in the air-tight packaging. The preservative creates a moist environment for the filter media, allowing the permeability and performance to be maintained by preventing biological growth during storage as well as providing a longer shelf-life of one-year from the manufacturing date printed on the package.
The sea water membrane price compared to other SpiroPure 2540 elements reflects the specialized composite polyamide for high-pressure environments.
FAQs on 2540 Seawater Filters
What is a 2540 seawater RO membrane used for?
A 2540 seawater RO membrane treats high-salinity water sources like ocean water to produce fresh drinking water at higher volume than a 2521 size. The SpiroPure SP-SW2540 suits marine watermakers, coastal facilities, and other seawater desalination applications requiring more output.
Is the SpiroPure SP-SW2540 compatible with SW30-2540?
Yes. The SpiroPure SP-SW2540 is manufactured as a compatible replacement for the Dupont Filmtec SW30-2540 and SE1-2540, matching their 2.5" x 40" size and high salt rejection performance for seawater desalination applications.
What is the salt rejection rate of the SP-SW2540 membrane?
The SpiroPure SP-SW2540 has a stabilized salt rejection rate of 99.6%, tested at 800 PSI against 32,000 ppm feedwater NaCl, roughly typical ocean salinity. It's rated for feedwater up to 40,000 ppm NaCl maximum.
Can I use a brackish water 2540 membrane instead of a seawater membrane?
No. The SP-BW2540 brackish membrane is rated for feedwater up to 10,000 ppm NaCl, far below seawater's typical 32,000+ ppm salinity, and isn't built for the pressure seawater desalination requires. Use the SP-SW2540 for genuine seawater applications and other high-TDS water treatment.
How often should a 2540 seawater RO membrane be replaced?
Most seawater RO membranes last 2 to 4 years depending on feed water quality, usage, and pre-filtration, similar to other commercial RO membranes. Seawater membranes are shipped wet with a food-grade preservative and carry a one-year shelf life from the manufacturing date if unused.
How much does the SpiroPure SP-SW2540 cost?
The sea water membrane price for the SpiroPure SP-SW2540 reflects its specialized composite polyamide construction built for high-pressure, high-salinity seawater desalination. See this page for current price savings compared to brand-name equivalents.
