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Dow Filmtec Reverse Osmosis Membranes

Dow Filmtec™ Tap Water Reverse Osmosis Membranes

Big Brand Low Energy Tap Water Reverse Osmosis Membrane
Big Brand Tap Low Energy series RO membranes are TFC high rejection RO membranes designed for use in tap water purifcation systems running between 100 and 180 psi. They may also be run at higher pressures in applications where cold inlet ...
Reg Price: $499.00
Sale Price: $237.49
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Making Sense of Commercial Reverse Osmosis Membranes.

There have been many technological improvements in RO membrane technology in the last decade. Selecting the correct RO membrane can be confusing at times. Here are some pointers to help you select the correct membrane.

1) Flow rates are always based on 77 degree F inlet temperature. If your water is colder production will be diminished. Therefore if your system has a pump and plumbing to make 2000 gallons per day at 77 degrees and your water temperature is 66 degrees you can run a membrane designed to make 2,500 gpd at 77 degrees (see chart below)
2) There are tape wrapped and fiberglass wrapped membranes. If you are running over 225 psi or using housings that hold more than three membranes fiberglass wrapped membranes are recommended.
3) For many applications 100 psi will product high enough water quality. The old days of having to run 220 psi to get good production are gone. Your system may be able to make more water at lower pressure by running a different membrane. You will need to check pump curves or plumbing specs for your system to assure this will work.

Here is a rundown on some of the popular Dow Filmtec membranes

Filmtec TW30-4040 - This is a tap water membrane. It will produce 2,400 gpd with 99.5% salt rejection @ 225 psi with a 2,000 ppm NaCl feed. This membrane is tape wrapped and has a 34 mil feed spacer thickness.

Filmtec LE-4040 – Replaces the part number BW30LE-4040. This is a low pressure brackish water membrane. It will produce 2,500 gpd with 99% salt rejection @ 150 psi with a 2,000 ppm NaCl feed This membrane is fiberglass wrapped and has a 34 mil feed spacer thickness.

LP-4040 - This is a low pressure tap water membrane. It will produce 2,900 gpd with 99.2% salt rejection @ 145 psi with a 500 ppm NaCl feed. This element replaces the older “cold water” elements with a newer membrane leaf technology. This membrane is tape wrapped and has a 34 mil feed spacer thickness.

XLE-4040 - This is a low pressure tap water membrane. It will produce 2,600 gpd with 99.0% salt rejection @ 100 psi with a 500 ppm NaCl feed. This element replaces the older TW30LE with a newer membrane leaf technology. This membrane is tape wrapped and has a 28 mil feed spacer thickness.

BW30-4040 - This is a brackish water membrane. It will produce 2,400 gpd with 99.5% salt rejection @ 225 psi with a 2,000 ppm NaCl feed. This membrane is fiberglass wrapped and has a 34 mil feed spacer thickness.

Shop All Dow Filmtec Tap Water Commercial Membranes
Dow Filmtec TW30-2013
Reg Price: $62.00
Sale Price: $76.60
Dow Filmtec TW30-2026
Reg Price: $329.87
Sale Price: $157.75
Dow Filmtec TW30-2514
Reg Price: $271.87
Sale Price: $157.99
Dow Filmtec TW30-2521
Reg Price: $369.75
Sale Price: $161.95
Dow Filmtec TW30-2540
Reg Price: $427.75
Sale Price: $188.85
Dow Filmtec TW30-4014
Reg Price: $605.37
Sale Price: $209.99
Dow Filmtec TW30-4021
Reg Price: $641.62
Sale Price: $245.25
Dow Filmtec  TW30-4040 Reverse Osmosis Membrane
Reg Price: $706.87
Sale Price: $237.99
Dow Filmtec TW30HP-2540
Reg Price: $514.75
Sale Price: $227.99
Dow Filmtec TW30HP-4611
Reg Price: $1,225.25
Sale Price: $490.10
Dow Filmtec TW30HP-4619
Reg Price: $1,508.00
Sale Price: $603.20
Dow Filmtec TW30HP-4641
Reg Price: $1,834.25
Sale Price: $725.95
Dow Filmtec XLE-2521
Reg Price: $391.50
Sale Price: $159.99
Dow Filmtec XLE-2540
Reg Price: $467.62
Sale Price: $183.99
Dow Filmtec XLE-4021
Reg Price: $681.50
Sale Price: $245.95
Dow Filmtec XLE-4040
Reg Price: $790.25
Sale Price: $259.99
Dow Filmtec TW30HP-2526
Reg Price: $580.57
Sale Price: $212.95
Dow Filmtec LP-2540
Reg Price: $523.73
Sale Price: $195.05
Dow Filmtec LP-4040
Reg Price: $783.99
Sale Price: $237.99
Dow Filmtec LE-4040
Reg Price: $783.99
Sale Price: $237.99
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