ESPA-4021

Summary

Product identification

• Membrane Element: ESPA-4021
• Configuration: Spiral Wound
• Membrane Polymer: Composite Polyamide
• Membrane Active Area: 28.6 ft²

Performance

• Permeate Flow: 1,000 gpd (3.8 m³/d)
• Salt Rejection: 99.4 % (98.0% minimum)

Operating limits

• Maximum Applied Pressure: 300 psig (2.1 MPa)
• Maximum Chlorine Concentration: < 0.1 PPM
• Maximum Operating Temperature: 113° F (45°C)
• pH Range (Continuous): 3.0 – 10.0
• Maximum Feedwater Turbidity: 1.0 NTU
• Maximum Feedwater SDI (15 mins): 4.0
• Maximum Feed Flow: 12 GPM (45.4 l/m)
• Minimum Ratio of Concentrate to Permeate Flow for any element: 5:1
• Maximum Pressure Drop for Each Element: 10 psi

Note: The limitations shown here are for general use. For specific projects, operating at more conservative values may ensure the best performance and longest life of the membrane. Refer to Hydranautics Technical Bulletins for more detail on operation limits, cleaning pH, and cleaning temperatures.

Test Conditions

Elements are wet tested for quality assurance using the following conditions (data taken after 30 minutes of operation):

• 1500 PPM NaCl solution
• 150 psi (1.03 MPa) Applied Pressure
• 77 °F (25 °C) Operating Temperature
• 10% Permeate Recovery
• 6.5 – 7.0 pH Range

Mechanical / hydraulic

• A (length): 21.0 inches (533.4 mm)
• B (diameter): 3.95 inches (100.3 mm)
• C (port diameter): 0.75 inches (19.1 mm)
• Weight: 4 lbs. (1.8 Kg)
• Core tube extension: 1.10 inches (27.9 mm)

Other Information

Minimum permeate flow for individual elements is 15 percent below the listed flow. All membrane elements are supplied with a brine seal and o-rings. Most elements are packaged dry, sealed in polyethylene bags, and shipped in a cardboard box. Some elements are sealed in polyethylene bags containing less than 1.0% sodium meta-bisulfite solution and shipped in a cardboard box.

Disclaimer: Hydranautics believes the information and data contained herein to be accurate and useful. The information and data are offered in good faith, but without guarantee, as conditions and methods of use of our products are beyond our control. Hydranautics assumes no liability for results obtained or damages incurred through the application of the presented information and data. It is the user’s responsibility to determine the appropriateness of Hydranautics products for the user’s specific end uses.

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Disclaimer: This summary is generated from extracted text and may not include all figures, footnotes, or the latest revisions. For contractual data, always refer to the official OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet