Pure Water & Clean Energy
Bringing Clean Water To Every Corner On Earth
Pure Water & Clean Energy
Bringing Clean Water To Every Corner On Earth
High-performance composite polyamide membranes for all reverse osmosis water treatment applications.
Hydranautics, a Nitto Group Company, is a leading manufacturer of high-performance composite polyamide membranes for reverse osmosis water treatment. ForeverPure supplies the complete range of Hydranautics membranes for seawater, brackish water, and tap water applications, delivering consistent performance and long service life.
High-rejection seawater RO membranes for desalination plants producing potable water from ocean and sea sources.
Energy-efficient membranes for brackish groundwater and surface water treatment in commercial and industrial systems.
Low-pressure membranes for commercial water purification, bottling, food & beverage, and pharmaceutical applications.
Active area, permeate flow and salt rejection for the Hydranautics elements we supply. Every figure below was read from Hydranautics’ own current specification sheet — the “sheet” link on each row opens the source document on membranes.com so you can check it. Figures are at each sheet’s stated test conditions, which differ between the seawater and brackish families, so compare within a family rather than across them. Elements whose current sheet we could not retrieve are deliberately left out rather than filled in from secondary sources.
High-pressure seawater elements for SWRO trains. Within the family, higher flow comes at the cost of a little rejection.
| Element | Active area | Permeate flow | Salt rejection | Source |
|---|---|---|---|---|
| SWC4-LD | 400 ft² (37 m²) | 6,500 GPD (24.6 m³/d) | 99.8% | sheet |
| SWC4-MAX | 440 ft² (41 m²) | 7,200 GPD (27.3 m³/d) | 99.8% | sheet |
| SWC5-LD | 400 ft² (37 m²) | 9,000 GPD (34.1 m³/d) | 99.8% | sheet |
| SWC5-MAX | 440 ft² (41 m²) | 9,900 GPD (37.5 m³/d) | 99.8% | sheet |
| SWC6-LD | 400 ft² (37 m²) | 6,000 GPD (22.7 m³/d) | 99.6% | sheet |
| SWC6-MAX | 440 ft² (41 m²) | 6,600 GPD (25.0 m³/d) | 99.6% | sheet |
Composite polyamide brackish elements, the workhorse family for industrial and municipal BWRO.
| Element | Active area | Permeate flow | Salt rejection | Source |
|---|---|---|---|---|
| CPA2 | 365 ft² (34 m²) | 10,000 GPD (37.9 m³/d) | 99.7% | sheet |
| CPA3 | 400 ft² (37 m²) | 11,000 GPD (41.6 m³/d) | 99.7% | sheet |
| CPA5-LD | 400 ft² (37 m²) | 11,000 GPD (41.6 m³/d) | 99.7% | sheet |
| CPA5-MAX | 440 ft² (41 m²) | 12,000 GPD (45.4 m³/d) | 99.7% | sheet |
| CPA6-LD | 400 ft² (37 m²) | 7,300 GPD (27.6 m³/d) | 99.80% | sheet |
| CPA6-MAX | 440 ft² (41 m²) | 8,000 GPD (30.3 m³/d) | 99.80% | sheet |
Energy-saving elements that reach target flow at lower feed pressure, cutting pump power on brackish and tap-water duty.
| Element | Active area | Permeate flow | Salt rejection | Source |
|---|---|---|---|---|
| ESPA2-LD | 400 ft² (37 m²) | 10,000 GPD (37.9 m³/d) | 99.6% | sheet |
| ESPA2-LD-4040 | 80 ft² (7 m²) | 2,000 GPD (7.6 m³/d) | 99.6% | sheet |
| ESPA4-4040 | 85 ft² (8 m²) | 2,500 GPD (9.5 m³/d) | 99.2% | sheet |
| ESPA4-LD | 400 ft² (37 m²) | 12,000 GPD (45.4 m³/d) | 99.2% | sheet |
| ESPA4-MAX | 440 ft² (41 m²) | 13,200 GPD (50.0 m³/d) | 99.2% | sheet |
| ESPAB-MAX | 440 ft² (41 m²) | 9,000 GPD (34.1 m³/d) | 99.3% | sheet |
Low-fouling composite elements with a neutrally-charged surface, for reuse and high-organic feeds.
| Element | Active area | Permeate flow | Salt rejection | Source |
|---|---|---|---|---|
| LFC3-LD | 400 ft² (37 m²) | 11,000 GPD (41.6 m³/d) | 99.7% | sheet |
| LFC3-LD-4040 | 80 ft² (7 m²) | 2,100 GPD (7.9 m³/d) | 99.7% | sheet |
Metric equivalents are converted from the manufacturer’s imperial figures. Permeate flow for an individual element normally varies by up to ±15% from the specified value. For array design see our SWRO design guide and chemical dosing guide, or send us your water analysis and we will run the projection.
Hydranautics (a Nitto Group company) is a leading manufacturer of reverse osmosis and nanofiltration membranes for industrial and municipal water treatment. Their membrane portfolio — CPA, ESPA, SWC, and LFC series — covers brackish water, seawater desalination, and wastewater reclamation applications worldwide.
Highest-area SWC6 element for maximum productivity in SWRO trains.
Low-differential-pressure SWC6 in 4" element format.
Low-differential-pressure SWC6 8-inch seawater element.
Standard SWC6 in 4-inch element size.
Standard high-rejection SWC6 seawater element.
High-area SWC5 element for productivity-focused SWRO.
Low-differential-pressure SWC5 in 4-inch element.
Low-differential SWC5 8-inch element.
Standard SWC5 in 4-inch size.
Standard SWC5 seawater element.
Higher-area SWC4B for productivity-focused SWRO duty.
Low-differential SWC4B seawater element.
Hydranautics (Nitto) composite polyamide RO and NF elements — including the SWC seawater, ESPA low-energy brackish, and CPA high-rejection series — for all water treatment applications.
Yes. Genuine Hydranautics elements are stocked and available at foreverpureplace.com.
Yes. Provide your feedwater and performance targets and we'll specify the right SWC/ESPA/CPA element or engineer a full system.
Contact us for membrane selection guidance and competitive pricing on Hydranautics products.
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