The SpiroPure SP-SW4040 Seawater Desalination Industrial Reverse Osmosis Membrane Element 4 x 40 is a high quality, high salt rejection replacement 4040 membrane filter cartridge. SP-SW4040 offers an extremely high salt rejection rate, making it the perfect choice for treating sea water and other high sodium applications.
Sea water Desalination RO Membrane and Recovery Specifications:
- Nominal Size: 4" x 40"
- Certification: NSF 61 certified
- Salt Rejection Rate: 99.7%
- Average Permeate ±15%: 1,700 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 1,200 PSI
SP-SW4040 High Rejection Membrane common applications:
- Seawater desalination
- High salinity feed water
- Cruise ship ocean water filtration
- Desalination plants
- Industrial wastewater
- Municipal reclaimed water
- High recovery RO systems
SW salt water/seawater membrane compatible model numbers:
- SE1-4040
- Dupont Filmtec SW30-4040
- Hydranautics Nitto SWC5-LD-4040
- LG Chen LG SW 4040 R
- Toray TM810V
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 2521 elements reflects the specialized composite polyamide for high-pressure environments.
FAQs on SP-SW4040
What is the salt rejection rate of the SP-SW4040 seawater membrane?
The SpiroPure 4040 seawater desalination element has a salt rejection test performance rate of 99.7%. The seawater desalination spiral is configured to withstand high pressure environments for excellent salt rejection from high NaCl feedwater.
What does 4040 mean in an RO membrane?
The number 4040 is shorthand for the membrane’s physical dimensions. It combines the nominal diameter (4.0 inches) with the nominal length (40 inches) into a universal model number. For reference, a smaller size such as the 2.5” by 21” model would convert to 2521.
What operating pressure does a 4040 seawater RO membrane require?
For optimal salt rejection and permeate flow, saltwater filtration membranes including the 4040 size operate at around 800 psi based on feedwater NaCl of 32,000 ppm and other specific lab conditions. Real world operating pressure can vary based on water quality, temperature, pH and other specifications with a maximum applied pressure of 1,200 psi.
Which membranes can the SP SW4040 replace?
SpiroPure’s SP-SW4040 seawater desalination membrane is a compatible replacement for the Axeon SE1-4040, Dupont Filmtec SW30-4040, Hydranautics Nitto SWC5-LD-4040, LG Chem LG SW 4040 R, Toray TM810V and similar composite polyamide 4040 seawater filters.
What is the price of the SpiroPure SP-SW4040 compared to the cost of other 4040 RO membranes?
The SpiroPure SP-SW4040 is priced to offer seawater desalination and other high-pressure RO applications at a lower cost than the brand name elements it replaces. The cost relative to other 4040 membranes reflects its specialized composite polyamide construction built for high-salinity seawater desalination. See this page for current price savings compared to brand-name equivalents.
How long does a 4040 RO membrane typically last?
Most commercial RO membranes, including the SP-SW4040, will last 2 to 4 or 5 years depending on feed water quality, usage volume, and pre-filtration. Poor pre-filtration can shorten that considerably, while proper usage even with continuous runtime can extend it toward the higher end.
