Hydranautics SWC-4021 Membrane

Product Description

Hydranautics has over two decades of experience in desalination and over 1.7 million cubic meters (461 million gallons per day) of seawater treated by their SWC (seawater composite) membranes. SWC seawater desalination membranes are available in high productivity 8-inch and 4-inch elements, all offering the highest levels of salt rejection and a consistently pure end product. Membrane formulations are designed to accommodate varying levels of seawater salinities worldwide with reliable field-proven performance.

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SWC-4021 Specifications:

Permeate Flow: 640gpd (2.4 m³/d)
Salt Rejection: 99.4% (99.0% minimum)
Configuration: Spiral Wound
Membrane Polymer: Composite Polyamide
Membrane Active Area: 28.6 ft²

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

32000 PPM NaCl solution
800 psi (5.5 MPa) Applied Pressure
77°F (25°C) Operating Temperature
10% Permeate Recovery
6.5 – 7.0 pH Range

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Standard Operating Limits:

Maximum Applied Pressure: 1,000 psig (6.9 MPa)
Maximum Chlorine Concentration: < 0.1 PPM
Maximum Operating Temperature: 113°F (45°C)
pH Range; Continuous (Cleaning): 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

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. See Hydranautics Technical Bulletins for more detail on operation limits, cleaning pH, and cleaning temperatures.

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