Description
Hydranautics ESNA1-LF-LD
The Hydranautics ESNA1-LF-LD is a low fouling reverse osmosis membrane element engineered for high-performance brackish water treatment applications. Featuring advanced composite polyamide membrane technology and a low fouling spiral wound design, the ESNA1-LF-LD delivers reliable permeate quality with reduced scaling and fouling potential in challenging feedwater conditions.
Designed with a 400 ft² active membrane area and optimized feed spacer geometry, this 8″ x 40″ element provides high productivity while maintaining efficient system operation at lower operating pressures.
Product Highlights
- Low fouling spiral wound membrane construction
- Composite polyamide membrane technology
- High permeate flow capacity of 9,500 GPD
- Typical calcium chloride rejection of 93%
- Optimized for brackish and well water applications
- 400 ft² active membrane area for high productivity
- Compatible with standard 8″ pressure vessels
- Includes brine seal, interconnector, and O-rings
- Factory preserved in sodium meta-bisulfite solution
Performance Specifications
- Permeate Flow: 9,500 GPD (36.0 m³/day)
- CaCl₂ Rejection: 93%
- Minimum/Maximum Rejection: 88% / 97%
- Typical Well Water Rejection: 96%
- Operating Flux: 13 GFD
- Test Pressure: 75 psi
- Operating Temperature (Test): 77°F (25°C)
- Permeate Recovery: 15%
- Test pH Range: 6.5 – 7.0
Element Dimensions
- Length (A): 40.0″ (1016 mm)
- Diameter (B): 7.89″ (200 mm)
- Tube Diameter (C): 1.125″ (28.6 mm)
Operating Limits
- Maximum Applied Pressure: 600 psi
- Maximum Operating Temperature: 113°F (45°C)
- Continuous pH Range: 2 – 10
- Cleaning pH Range: 1 – 12
- Maximum Feedwater Turbidity: 1.0 NTU
- Maximum Feedwater SDI: 5.0
- Maximum Feed Flow: 85 GPM
- Minimum Brine Flow: 12 GPM
- Maximum Pressure Drop per Element: 15 psi
- Maximum Chlorine Concentration: <0.1 ppm
Applications
- Brackish water reverse osmosis systems
- Industrial process water treatment
- Commercial water purification systems
- Well water treatment
- Low fouling membrane retrofit applications
