Brackish Water Commercial

These commercial thin film BWRO elements are wrapped in a hard shell of FRP for added strength and to withstand higher pressure drops. High-flow option for higher permeate production are available in select sizes. (High-flow models are indicated by “AHF” at the end of the part number.)
AMI reverse osmosis membrane elements are among the finest in the industry. With hundreds of thousands of RO membranes in operation world-wide, AMI BWRO Membranes are 100% Quality and Performance Tested in our ISO 9001:2015 Certified Facilities. Each reverse osmosis membrane element meets or exceeds our strict performance requirements before shipping.
For the past 30 years we have earned a reputation of delivering consistent, high quality which makes AMI Membranes the natural choice for use in reverse osmosis water treatment systems.
| Model No. | GPD | LPD | Size (Dia. x Length) | Recovery | Min. Rejection | Stabilized Rejection |
|---|---|---|---|---|---|---|
| M-B2514A | 200 | 757 | 2.5 x 14 | 5 | 98 | 99.5 |
| M-B2521A | 325 | 1230 | 2.5 x 21 | 8 | 98 | 99.5 |
| M-B2540A | 1000 | 3785 | 2.5 x 40 | 15 | 98 | 99.5 |
| M-B2540AHF | 1060 | 4012 | 2.5 x 40 | 15 | 98 | 99.5 |
| M-B4014A | 525 | 1987 | 4.0 x 14 | 5 | 98 | 99.5 |
| M-B4014AHF | 655 | 2479 | 4.0 x 14 | 5 | 98 | 99.5 |
| M-B4021A | 900 | 3407 | 4.0 x 21 | 8 | 98 | 99.5 |
| M-B4021AHF | 1125 | 4258 | 4.0 x 21 | 8 | 98 | 99.5 |
| M-B4040A | 2400 | 9084 | 4.0 x 40 | 15 | 98 | 99.5 |
| M-B4040AHF | 3000 | 11355 | 4.0 x 40 | 15 | 98 | 99.5 |
Performance specifications are based on 2,000 mg/l sodium chloride, 225 psi applied pressure, 77°F feed water temperature, pH 8 and listed recovery. Element permeate flow may vary ±20%.






- Hard fiberglass exterior provides added strength and withstands higher pressure drops than tape-wrapped elements.
- Reverse osmosis membranes remove up to 99% of total dissolved solids.
- RO membranes remove dissolved impurities such as chloride, lead, chromate, fluoride, bacteria and others.
- Hard fiberglass exterior for added strength and durability
- High rejection and flow rate
- Manufactured in ISO 9001:2015 certified facilities
- 100% performance and quality tested
- Backed by experienced technical support staff
- High quality for consistent and reliable performance
- Uses advanced membrane film technology and manufacturing processes
- Standard dimensions to fit commonly available housings




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- Commercial Water Treatment
- Wide variety of other applications
- PVC pressure vessel membrane housings
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- Membrane cleaning cartridges
- Membrane cleaning chemicals
- Commercial brackish water RO membrane specifications
- AMI brand membrane elements brochure
- Membrane storage, disinfection and preservation
- RO membrane temperature and pressure correction
- Comparison of RO, UF, MF, NF membranes
- Membrane warranty
- About reverse osmosis