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RO and NF Membrane Element
Product Brochures
KeenSen Technology Co., Ltd.
Ⅰ. Company ProfileKeenSen Technology Co., Ltd.,
established in March, 2008, is a high-tech
company, specializing in professional separation
membrane production and applications with its
head office located in the High-tech Industrial
Development District in Changsha, China.
KeenSen introduced advanced membrane
technologies and equipment from US for
manufacturing reverse osmosis membrane and
nanofiltration membrane. It accelerated the
process of domestic separation membrane industry development to be among the best in the world.
The RO and NF membranes and related elements of KeenSen can be widely used in more than 50
industries, including water treatment projects, environmental restoration project etc. They are green
products serving the construction of “Two-Oriented Society” and considered as high tech core products
which will help human race to up against resource shortages and environment pollution.
KeenSen always keep analyzing and digging the potential demands of customer to improve the
“one-stop customer centralized” service system. With this concept in mind, we created a worry free service
brand, providing the customer with characteristic, fast, quality and credible service through unified service
training. The customers can truly experience KeenSen’s quality persistent and responsibility.
Ⅱ. Industrial RO Membrane ElementA. Brackish Water Membrane Element(BW-8040, BW-4040), Fouling Resistant Membrane
Series(BW-8040FR, BW-4040FR)
Model Active
Membrane
Area(ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
GPD(m3/d)
Stabilized Salt
Rejection (%)
Min. Salt
Rejection (%)
BW-8040 400(37.2) 225(1.55) 10500(39.7) 99.5 99.0
BW-4040 78(7.2) 225(1.55) 2600(9.8) 99.5 99.0
BW-8040FR 365(34.0) 225(1.55) 9500(35.9) 99.5 99.0
BW-4040FR 72(6.7) 225(1.55) 2400(9.0) 99.5 99.0
Test Condition
Temperature of Testing Solution …………...................25 °C
Concentration of Testing Solution (NaCl)……..............2,000ppm
PH Value of Testing Solution ………………..................7.5-8
Recovery Rate of Single Membrane Element…...........15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 600 psi (4.14MPa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
pH Range of Feedwater during Continuous Operation….. 3~10
pH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
The Application Scope
1. The BW series is mainly used to the treatment of brackish water..
2. The FR series is mainly applied to the treatment and reuse of surface water, industrial wastewater, and
the salt rejection of moderate-high brackish water.
3. FR membrane can greatly increase the resistance of the dirt plugging of system and reduce the cleaning
frequency, etc.
4. Standard operating pressure is 1.55MPa. In actual project application, the operating pressure is affected
by the concentration of water quality, system recovery rate, etc.
Product Advantage
The BW Series is stable in performance with wide application range, high salt rejection rate, high flux,
extended service life, can save the equipment investment and operating expense.
B. Ultra Low Pressure Membrane Element Series (ULP-8040, ULP-4040).High Rejection Membrane
Elements(ULP-8040HR, ULP-4040HR)
Model Active
Membrane
Area(ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
GPD(m3/d)
Stabilized Salt
Rejection (%)
Min. Salt
Rejection (%)
ULP-8040 400(37.2) 150(1.05) 10500(39.7) 99.2 98.5
ULP-4040 78(7.2) 150(1.05) 2200(8.3) 99.2 98.5
ULP-8040HR 400(37.2) 150(1.05) 9500(35.9) 99.5 99.0
ULP-4040HR 78(7.2) 150(1.05) 2000(7.6) 99.5 99.0
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (NaCl)……...............1,500ppm
PH Value of Testing Solution ………………...................7.5-8
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 600psi (4.14Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
pH Range of Feedwater during Continuous Operation….. 3~10
pH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
The Application Scope
1. The ULP membrane is mainly applied to the salt rejection of low-salt water.
2. The HR series have the higher rejection and low working pressure, compare with other model.
2. The standard operating pressure is 1.05 MPa. In actual application, operating pressure is affected by the
density of water quality and the system recovery rate, etc.
C. Extremely Low Pressure Membrane Element (XLP-8040 Membrane, XLP-4040)
ModelActive Area
ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
GPD(m3/d)
Stabilized Salt
Rejection %
Min. Salt
Rejection %
XLP-8040 400(37.2) 100(0.7) 9500(35.9) 99.0 98.0
XLP-4040 78(7.2) 100(0.7) 2000(7.6) 99.0 98.0
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (NaCl)……...............500ppm
PH Value of Testing Solution ………………...................7.5-8
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 600psi (4.14Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
pH Range of Feedwater during Continuous Operation….. 3~10
pH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
The Application Scope
1. The XLP membrane is mainly applied to the low salt raw water.
2. The standard operating pressure is 1.05 MPa. In actual application, the operating pressure is affected by
density of water quality and the system recovery rate, etc.
Ⅲ. Industrial Nanofiltration Membrane ElementA. High Salt Rejection NF1-8040, NF1-4040 Membrane Element Series
ModelActive Area
ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
GPD(m3/d)
Salt Rejection %
NaCl MgSO4
NF1-8040 400 (37.2) 70(0.48) 9000 (34.1) 60~80 >96
NF1-4040 78 (7.2) 70(0.48) 1750 (6.6) 60~80 >96
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (NaCl)……...............500ppm
Concentration of Testing Solution (MaSO4)..................2,000ppm
Operating Condition.......................................................70psi (0.48MPa)
PH Value of Testing Solution ………………...................7.5-8
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 600psi (4.14Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
pH Range of Feedwater during Continuous Operation….. 3~10
pH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
The Application Scope
1. NF1 Series is widely used in direct drinking water, spring water and low pressure boiler softened water
system.
2. The standard operating pressure is 0.48MPa. In actual projects, the operating pressure is influenced in
some aspects, such as the quality of salt water with different salinity levels and the rate of system recovery,
etc.
B. High Flux Nanofiltration Membrane Element Series (NF2-8040, NF2-4040)
Model
Active
Membrane
Area (ft2(m2)
Operating
Pressure(ps
i(MPa))
Permeate Flow
GPD(m3/d) Salt Rejection (%)
NaClMgSO4
NF2-8040 400 (37.2) 70(0.48) 11000(41.7) 30~50 96±2
NF2-4040 78 (7.2) 70(0.48) 2200(8.3) 30~50 96±2
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (NaCl)……...............500ppm
Concentration of Testing Solution (MgSO4)..................2,000ppm
Operating Condition.......................................................70psi (0.48MPa)
PH Value of Testing Solution ………………...................7.5-8
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 600psi (4.14Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
pH Range of Feedwater during Continuous Operation….. 3~10
pH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
The Application Scope
1. The NF2 membrane series can partially soften the organics of surface water and groundwater and its flux
is large.
2. The ions retention rate of NF2 membrane is lower than that of NF1 membrane element’s.
3. The standard operating pressure is 0.48MPa. In actual projects, the operating pressure is influenced in
some aspects, such as the quality of salt water with different salinity levels and system recovery rate, etc.
C. Material Separation Nanofiltration Membrane Series(NF-8040F, NF-4040F)
ModelActive Area
ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
Rate GPD(m3/d)
Salt Rejection
Rate %
MgSO4
NF1-8040F 400(37.2) 70(0.48) 9000(34.1) 98
NF1- 4040F 78(7.2) 70(0.48) 1750(6.6) 98
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (MgSO4)..................2,000ppm
Operating Condition.......................................................70psi (0.48MPa)
PH Value of Testing Solution ………………...................6.5-7
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 600psi (4.14Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
PH Range of Feedwater during Continuous Operation….. 3~10
PH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
The Application Scope
1. This membrane model is mainly used for the removal or concentration of dye, removal of heavy metal
and the concentration and desalination of whey protein.
2. Higher than divalent ions are preferentially trapped, the retention of monovalent ions will be affected by
the material liquid concentration.
3. This membrane model is widely applied to desalination of surface water, landfill leachate, dyeing
wastewater, etc. Meanwhile, this membrane model has a good effect on discoloring reaction and it
contributes to the COD removal, which is up to 95%.
D. Material Separation Nanofiltration Membrane Element Series (NF2-8040F, NF2-4040F).
ModelAffective Area
ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
Rate GPD(m3/d)
Salt Rejection Rate %
MgSO4
NF2-8040F 400(37.2) 70(0.48) 11000(41.7) 96
NF2-4040F 78(7.2) 70(0.48) 2200(8.3) 96
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (NaCl)......................2,000ppm
Concentration of Testing Solution (MgSO4)…………….2,000ppm
Operating Condition.......................................................70psi (0.48MPa)
PH Value of Testing Solution ………………...................6.5-7
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 600psi (4.14Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
PH Range of Feedwater during Continuous Operation….. 3~10
PH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
The Application Scope
1. This membrane model is mainly applied to the removal or concentration of dye, the removal of heavy
metal, the recycling of sodium chloride solution, the treatment of landfill leachate and coking wastewater.
2. Higher than divalent ions are preferentially trapped, the retention of monovalent ions will be affected by
the material liquid concentration.
Ⅴ.KeenSen 4", 8" Membrane Element Size Display4"
8"
A B C D
40"(1016.1mm) 3.9"(99.0mm) 0.75" (19.1mm) 1.05" (26.7mm)
A B C
40.0"(1016.1mm) 7.9"(201mm) 1.125"(28.6mm)
Ⅵ. KeenSen Domestic Nanofiltration Membrane Element(1) NF1-75, 100, 200, 300GPD Model
ModelActive Area
ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
GPD(m3/d)Salt Rejection %
NF1-1812-75 4(0.37) 70 (0.48) 75(0.28) 70±10
NF1-2012-100 5(0.46) 70(0.48) 100(0.38) 70±10
NF1-2812-200 10(0.93) 70(0.48) 200(0.76) 70±10
NF1-3012-300 14(1.30) 70(0.48) 300(1.14) 70±10
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (Tap Water)......................250ppm
Operating Condition......................................................70psi (0.48MPa)
PH Value of Testing Solution ………………...................6.5-7
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 300psi (2.07Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
PH Range of Feedwater during Continuous Operation….. 3~10
PH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
(2) NF2-75, 100, 200, 300, 400GPD Model
ModelActive Area
ft2(m2)
Operating
Pressure
psi(MPa)
Permeate Flow
GPD(m3/d)
Salt Rejection
Rate %
NF2-1812-75 4(0.37) 70(0.48) 75(0.28) >30
NF2-2012-100 5(0.46) 70(0.48) 100(0.38) >30
NF2-2812-200 10(0.93) 70(0.48) 200(0.76) >30
NF2-3012-300 14(1.30) 70(0.48) 300(1.14) >30
NF2-3013-400 16(1.48) 70(0.48) 400(1.51) >30
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (Tap Water)..............250ppm
Operating Condition......................................................70psi (0.48MPa)
PH Value of Testing Solution ………………...................6.5-7
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 300psi (2.07Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
PH Range of Feedwater during Continuous Operation….. 3~10
PH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
Ⅶ. KeenSen Domestic Reverse Osmosis Membrane Element
Test Condition
Temperature of Testing Solution …………....................25 °C
Concentration of Testing Solution (Tap Water)......................250ppm
Operating Condition......................................................60psi (0.41MPa)
PH Value of Testing Solution ………………...................6.5-7
Recovery Rate of Single Membrane Element…............15%
Extreme Operation Conditions
Max. Working Pressure…………………........................... 300psi (2.07Mpa)
Max. Feedwater Temperature…………………….............. 45°C
Max. Feedwater SDI………………….................................5.0
Free Chlorine Concentration of Feedwater………………...0.1mg/L
PH Range of Feedwater during Continuous Operation….. 3~10
PH Range of Feedwater during Chemical Cleaning……....2~12
Max. Pressure Drop of Single Membrane Element…….....10psi (0.07Mpa)
ModelAffective Area
ft2(m2)
Operating
Pressure
psi(MPa)
Permeate
Flow
GPD(m3/d)
Stable
Rejection
Rate %
Lowest
Rejection
Rate %
RO-1812-50 3.5(0.32) 60(0.41) 50(0.19) 97 96
RO-1812-75 4(0.37) 60(0.41) 75(0.28) 97 96
RO-2012-100 5(0.46) 60(0.41) 100(0.38) 97 96
RO-2812-200 10(0.93) 60(0.41) 200(0.75) 97 96
RO-3012-300 14(1.30) 60(0.41) 300(1.12) 97 96
Adds: No.6, Lutian RD, Lu Valley, Changsha, Hunan, China 410205
Tel: 86-31-8992869 Fax: 86-31-8992600
Mobile:86-18874055961
Website: www.keensen.com/en