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RO Membranes

Top quality membranes for commercial reverse osmosis systems.



Watts® Commercial Membranes
Part Number Application O.D. Length Capacity (GPD) No. Per Case
W-2521-TW Tap water 2-1/2" 21" 300 1
W-2540-TW Tap water 2-1/2" 40" 800 1
W-4021-TW Tap water 4" 21" 1,050 1
W-4040-TW Tap water 4" 40" 2,200 1
W-4040-BW Brackish water 4" 40" 2,200 1
Note: Watts commercial membranes are packaged in preservatives. Keep in cool environment if stored for prolonged periods of time.

Watts Membrane Specifications
Data W-2521-TW W-2540-TW W-4021-TW W-4040-TW W-4040-BW
Membrane type TFC TFC TFC TFC TFC
Material Polyamide Polyamide Polyamide Polyamide Polyamide
Charge Negative Negative Negative Negative Negative
Configuration Spiral-wound Spiral-wound Spiral-wound Spiral-wound Spiral-wound
Salt rejection 99.5% 99.5% 99.5% 99.5% 99.5%
Max. operating temp. 113°F / 45°C 113°F / 45°C 113°F / 45°C 113°F / 45°C 113°F / 45°C
Max. operating pressure 400 psi 400 psi 400 psi 400 psi 600 psi
Maximum turbidity (NTU) <1 <1 <1 <1 <1
Max. SDI <5 <5 <5 <5 <5
pH range (cleaning) 2-11 2-11 2-11 2-11 2-11
Flux (GPD) 300 800 1,050 2,200 2,200
Note: Tap water membrane specifications are based on 225 psi pressure and 77°F temperature.

Filmtec® By Dow® Commercial Membranes For Tap Water
Part Number Application O.D. Length Capacity (GPD) No. Per Case
TW30-2514 Tap water 2-1/2" 14" 170 1
TW30-2521 Tap water 2-1/2" 21" 300 1
TW30-2540 Tap water 2-1/2" 40" 660 1
TW30-4014 Tap water 4" 14" 480 1
TW30-4021 Tap water 4" 21" 900 1
TW30-4040 Tap water 4" 40" 2,200 1
Note: Specifications are based on 225 psi pressure and 77°F temperature.

Commercial Membranes For Brackish Water
Part Number Application O.D. Length Capacity (GPD) No. Per Case
BW30-2540 Brackish water 2-1/2" 40" 660 1
BW30-4040 Brackish water 4" 40" 2,200 1
BW30-400 Brackish water 8" 40" 10,500 1
Note: Brackish water membrane specifications are based on 225 psi pressure and 77°F temperature.

Filmtec® By Dow® Commercial Membranes For Sea Water
Part Number Application O.D. Length Capacity (GPD) No. Per Case
SW30-2514 Sea water 2-1/2" 14" 100 1
SW30-2521 Sea water 2-1/2" 21" 200 1
SW30-2540 Sea water 2-1/2" 40" 540 1
SW30-4021 Sea water 4" 21" 600 1
SW30-4040 Sea water 4" 40" 1,500 1
SW30-8040 Sea water 8" 40" 6,000 1
  

Membrane Product Guide

4" Membranes
Manufacturer Model # Approx GPD % Reject
lonpure PWS PFC-4 2300 99.6
lonpure PWS HS2-4 2800 99.6
Filmtec TW30-4040 2400 99.5
Fllmtec LP-4040 3200 99.2
Filmtec XLE-4040
2600
99.0 
Filmtec BW30-4040 2400
99.5
Filmtec BW30LE-4040 2300
99.2
Filmtec RO-4040-FF 2650 99.5
Filmtec HSRO-4040-FF 1900 99.5
Filmtec SW30-4040 1500 99.2
Hydranautics CPA2-4040 2250 99.2
Hydranautics ESPA1-4040 2600 99.0
Hydranautics ESPA2-4040 1900 98.0
Hydranautics ESPA3-4040 3000 98.0
Hydranautics ESPA4-4040 2500 99.2
Hydranautics SWC1-4040 1100 99.6
  8" Membranes
Manufacturer Model # Approx GPD % Reject
lonpure PWS PFC-8 9000 99.6
lonpure PWS HS2-8 11200 99.6
Filmtec BW30-365
9500
99.5
Filmtec BW30-400 10500 99.5
Filmtec BW30LE-440 11500 99.2
Fllmtec BW30-365FR 9500 99.5
Filmtec  BW30-400/34i 10500
99.5
Fllmtec BW30-440i 11500 99.5
Filmtec LE-440i 12650 99.3
Fllmtec SW30XLE-400i 9000 99.7
Fllmtec SW30HR-LE400i 7500 99.8
Filmtec SW30HR-380 6000 99.7
Filmtec SW30HR-LE400 7500 99.8
Filmtec RO-390-FF 10800 98.0
Filmtec HSRO-390-FF
9000 99.5
Hydranautics CPA2 10000 99.2
Hydranautics CPA3 11000 99.6
Hydranautics CPA4 6000 99.7
Hydranautics ESPA1 12000 99.0
Hydranautics ESPA2 9000 99.5
Hydranautics ESPA3 15000 98.0
Hydranautics ESPA4 12000 99.2
Hydranautics SWC3 5900 99.6
Hydranautics SWC3+ 7000 99.8
Hydranautics SWC4 6500 99.8
Hydranautics SWC5 9000 99.8

Standard Elements Cross-Reference Guide

4" Membranes
Type Filmtec Hydranautics Koch/Fluid Systems Toray Desal GE Osmonics Saehan Trisep
TFC-4040 BW30-4040 CPA2-4040 4820 HR/
320 HR/
4820 XR
SU-710L AG4040FF 414-HR(PA)/
414-HF(PA)
RE4040-BN 4040-ACM2-TSF
TFC-LP-4040 BW30LE-4040 ESPA1-4040 4821 ULP
SUL-G10 AK4040FF RE4040-FL 4040-ACM4-TSF/
ACMS-TV
TFC-TW-4040 TW30-4040 4040 HR TM710 AG4040TF 415-HR(PA) RE4040-TE
TFC-XLP-4040 XLE-4040 ESPA4-4040 4040 ULP 411-LE(PA) RE4040-BLF
TFC-SW-4040 SW30-4040 SWC1-4040 1820SS/
820SS/
1820HF
TM-810L SE4040FF 414-SW2(PA) RE4040-SR 4040-ACMS-SSF
TFC-FF-4040
RO-4040-FF SanRO CPA3-4040 SG4040C
TFC-HSRO-4040 HSRO-4040-FF SanRO ESPA2-4040
NF NF-4040 DL4040F/DK4040F 4040-XN45-TSF


8" Membranes
Type Filmtec Hydranautics Koch/Fluid Systems Toray Desal GE
Osmonics
Saehan Trisep
TFC - 365 sf BW30-365 CPA2 8822HR-365 TM720-370 AG8040F Muni RO 350 RE8040-BN 8040-ACM2-TSA
TFC - 400 sf BW30-400 CPA3 8822HR-400 TM720-400 AG8040F400 Muni RO 400 RE8040-BE 8040-ACM2-UWA
TFC - 400+ sf BW30-440i CPA3 9822HR-400 TM720-430 AK8040F400      
TFC - LP - 400 sf LE-400 ESPA1 8822ULP-400 TM820H-370   Muni LE-RO-400 RE8040-BL 8040-ACM4-UWA
TFC - LP - 400+ sf LE-440i ESPA1 8822ULP-400 TMG20-430     RE8040-BL(N) ACM5-UWA
TFC- XLP- 400+ sf XLE-440 ESPA4 8823UPP-400 TMH20-400     RE8040-BLF 8040-ACM5-UWA
TFC - LF - 365 sf BW30-365FR LFC3 8822FR-365 TML20-370   Duraslick
RO 8040
RE804O-FN 8040-X201-TSA
TFC - SW - <400 sf SW30HR-380 SWC3 2822SS-360 TM820-370 SC8040F   RE8040-SR 8040-ACMS-SPA
TFC - SW - 400 sf SW30HRLE-400 SWC3+ 2822SS-360 Premium TM820H-400     RE8040-SH 8040-ACMS-SPA
TFC - SW - 400+ sf SW30XLE-400i SWC5 2822HF-370 SU-720R        
TFC - FF - 390 sf RO-390-FF SanRO CPA3 8822RO-N1   SG8040C Muni
LE-RO-FF-365
  8040-M2P3W7
NF NF90-400 ESNA1-LF TFC 8921S SU-620   811NF300(PA) NE-8040-90 8040-TS80- TSA
NF NF270-400 HYDRACoRe     DL8040F 811NF100(PA) NE-8040-40  
Note: Membrane equivalents are based on similar size and functionality. Conversion may require consideration of flow rates changes, adapter modifications and feed water characteristics. Please contact technical support for more information.