spiral NF Membrane for Color Remove

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We always believe that one's character decides products' quality, the details decides products' high-quality ,together with the REALISTIC,EFFICIENT AND INNOVATIVE crew spirit for spiral NF Membrane for Color Remove, The product will supply to all over the world, such as: Bangladesh, Bolivia, Paraguay, We warmly welcome domestic and overseas customers to visit our company and have business talk. Our company always insists on the principle of "good quality, reasonable price, the first-class service". We are willing to build long-term, friendly and mutually beneficial cooperation with you.
RisingSun Membrane Technology (Beijing) Co., Ltd. Diamond / Audited Supplier

NF membrane has a molecular weight cut-off between 200-800 Dalton usually. It is generally targeted to remove only divalent and larger ions. Monovalent ions such as sodium and chloride will pass through a nanofiltration membrane, therefore many of its uses involve groundwater softening, de-salting of the process stream. NF membrane is also becoming more widely used in food processing applications such as dairy, for simultaneous concentration and partial (monovalent ion) demineralisation.
NF membrane operation press is around 3.5-30 bar.

We provide spiral nanofiltration membranes, DOW NF270 nanofiltration membrane is an ideal choice for surface water and ground water where good organic removal is desired with partial softening.  We using DOW NF270 flat sheet membrane for water soft. The performance is satisfied. NF270 MWCO:300-400 Dalton. We have standard size like 2540 NF membrane, 4040 NF membrane, 8040 NF membrane. Also, we can make small size 1812 for lab test.

Decoding of the product code: SG-NF5-4040-F1

Configuration Outer Wrap Membrane Type Size Feed Spacer
4040 3.9″×40″ A=13mil F=31mil
2540 2.5″×40″ B=17mil G=46mil
3838 3.8″×38″ C=20mil H=65mil
6338 6.3″× 38″ D=26mil I=80mil
8040 8.0″× 40″ E=28mil J=120mil
1=Diamond 2=Parallel

NF Products
With a pore size between 0.1-10nm, Nanofiltration membranes allow water and some salts to pass through the membrane while retaining multivalent ions, low molecular weight molecules, sugars, proteins, and other organic compounds. 

After years of research and development, We can offer different molecular weight NF membranes to meet a wide range of industiral separation processes.

Our NF5 has excellent MgSO4 and lactose rejection,which can be used for dairy industry. Nanofiltration membranes overall are also able to greatly reduce levels of hardness, nitrates, sulfates, tannins, turbidity, color, TDS, and moderate levels of salt from feed water streams.

Our NF membrane specifications

NF membrane Stable Rejection (%) Flux rate (LMH) Replacement reference Typical applications
NF1 ≥99.0 43 NF90 Soft water;
Acid and caustic recovery; Precious-metals recovery;
Dye concentration, desalination;
Whey desalination;
Antibiotic concentration;
Polysaccharide desalination;
BOD/COD removal; etc.
NF2 ≥99.0 42 NF245
NF3 ≥97.0 55 NF270
NF4 92.0-95.0 50 GE DL
NF5 ≥98.5 38 DK
NF6 ≥90.0 18 SelRO MPS-34
NF7 85.0-95.0 60 XN45
NF8 60.0-85.0 65 UA60

NF1-NF3 test condition: 2,000ppm MgSO4, 70psi(0.48MPa), 25ºC;                        
NF4, NF5, NF7, NF8  test condition: 2,000ppm MgSO4, 110psi(0.76MPa), 25ºC;                        
NF6 test condition: 2,000ppm NaSO4,  142psi(1.0MPa), 25ºC.    

Water softening                    
Precious metal recovery                    
Concentration of protein, amino acid, vitamin in food, beverage and pharmaceutical industry         
Acid/caustic recycling                    
Dye color removal                    
Heavy metal separation of waste water
Removal of natural organic matter in water and wastewater treatment
Reduction of hardness in water purification
Sulfate removal from seawater and chemical processes
Desalting of process streams in various industries

Operation Conditions:
Maximum Operating Temperature: 113°F (45°C)
Maximum Operation Pressure: 600 psi (41 bar)  
Maximum Pressure Drop: 15 psi (0.9bar)
Maximum Feed Silt Density Index: SDI 5
Free Clorine Tolerance: <0.1ppm
Operating pH Range: 2.0 – 11.0

pH Range, Short-Term:2-11

Cross Replacement Refer:

RisingSun Products Replacements
SG-NF1-2540 DOW NF90-2540
SG-NF1-4040 DOW NF90-4040
SG-NF1-8040 DOW NF90-400
SS-NF2-3838-F1 DOW NF245-3838/30-FF
SS-NF2-3840-F1 DOW NF245-3840/30-FF
SS-NF2-8040 DOW NF245-390-FF
SG-NF3-4040 DOW NF270-4040
SG-NF3-8040 DOW NF270-400
SS-NF5-4040 Synder NFX3-4040
SS-NF5-8040 Synder NFX3-4040



Model A (inch) B (inch) C (inch)
NF-4040 40 3.9 0.75

Why us?             
Various of NF membrane molecular.
Imported high quality raw material, high flux, chemical resistance            
Precise MWCO                    
Simple and economic module replacement            
Various choices of module dimensions            
Competitive price with fast delivery
Testing sample is available


The above picture is our NF membranes for fermentation liquid concentration.