SW 4021 Sea Water RO Membrane - Commercial Reverse Osmosis
This is an industrial-grade membrane that’s not meant to be altered or experimented with. If changes must be made, please get in contact with an appropriate professional. - Refunds are only accepted if the product(s)are in their original packaging and unused.
Brief Introduction
SW series membrane elements are generally suitable for the treatment of seawater and brackish water with high concentrations. It can be used for seawater desalination, desalination of brackish water with high concentration, boiler replenishment water in power plants, wastewater reuse, concentration and recovery of high value-added substances such as food and pharmaceuticals, SW series of seawater aromatic polyamide RO element for seawater desalination. This series of elements have the characteristics of low operating pressure, low equipment investment, good desalination performance, and stability.
SW series membrane elements are generally suitable for the treatment of seawater and brackish water with high concentrations. It can be used for seawater desalination, desalination of brackish water with high concentration, boiler replenishment water in power plants, wastewater reuse, concentration and recovery of high value-added substances such as food and pharmaceuticals, etc.
Max Water SW 4021 900 GPD Commercial RO Membrane
- Reverse Osmosis membrane elements for commercial drinking water systems are the industry's most reliable method of water filtration. Advanced membrane technology and automated fabrication allow these elements to deliver consistent performance that equipment suppliers, water treatment dealers, and residential customers can rely on. Our Reverse Osmosis membranes are shipped dry for convenient handling and long shelf-life.
We suggest changing your membrane every 2 years
Specifications
- 950 Gallon Per Day Membrane for Commercial Reverse Osmosis Systems.
- Removes particles down to 1/10,000th of a micron (removing 99.5% of impurities including organic, inorganic contaminates, chemicals, ETC.).
TDS = Total Dissolved Solids.
Membrane Features
- Provides stable, high rejection of contaminates even with high TDS water sources.
- Advanced membrane technology with innovative thin-layer composite membrane design.
- More consistent performance with less fouling requiring less frequent cleaning and changeouts.
- 100% dry-stored membrane maximizing shelf life.
General Information
- The first full tank of permeate should be discarded, DO NOT use this initial permeate for drinking water or food preparation as it may contain carbon fines and manufacturing by-products.
- Keep membrane moist at all times after initial wetting.
- To prevent biological growth during prolonged system shutdowns, it is recommended that membrane elements be immersed in a preservative solution.
- The membrane shows some resistance to short-term contact with chlorine (hypochlorite). Continuous exposure, however, may damage the membrane and should be avoided.
- If operating limits and guidelines given in this bulletin are not strictly followed, the limited warranty will be null and void.
It is applicable to the desalination of seawater, groundwater with heavy salt concentration. It can be widely used in residential dual water supplying systems, pure water preparation plant, industry, food production, and other fields, etc.
| Model | Active Membrane Area ft2(m2) | Concentrate Channel Spacer (mil) | Permeate Flow GPD(m3/d) | Stable Rejection Rate (%) | Minimum Rejection Rate (%) |
| SW-4021 | 33(3.1) | 28 | 750(2.8) @ 800 psi operating pressure | 99.50 | 99.20 |
| Concentration of Solution (NaCl) | Temperature | pH Value | Operating Pressure psi(MPa) | Recovery Rate(%) |
| 15000 - 40000 mg/L | 25 | 7.5-8 | 800psi(5.52MPa) | 4 |
Notes: The permeate flow of single membrane element may vary with in ±15%.
Operating Limits and Conditions of Membrane Element:
| Max.Working Pressure | 1200 psi(8.28MPa) |
| Max. FeedWater Temperature | 45 |
| Max. FeedWaterSDI15 | 5.0 |
| Max. Feed Water Flow | 16gpm(3.6m3/h) |
| Free Chlorine Concentration of FeedWater | <0.1ppm |
| pH Range of FeedWaterDuring Continuous Operation | 2-11 |
| pH Range of FeedWaterDuring Chemical Cleaning | 1-13 |
| Max. Pressure Drop of Single Membrane Element | 10psi(0.07Mpa) |
SW-4021 Reverse Osmosis Membranes for many Applications such as:
- Car Washes
- Whole House Reverse Osmosis
- Commercial Reverse Osmosis
- Agricultural
- Industrial
Commonly referred to as Extra Low Pressure, Extra Low Energy, Ultra Low Pressure, or Ultra Low Energy
4.0" x 21" Fits nearly all standard 4.0" x 21" Membrane housings Fiberglass.

