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Home Parts Membranes CategoryIndustrial NF Membrane

Industrial NF Membrane

Industrial NF Membranes – 98% Retention of Dissolved Salts

Industrial NF membranes are a type of membrane separation technology equipment used in industry. Due to its specific pore size, it can filter out tiny particles, colloidal substances, and most of the dissolved substances in the solution, while retaining the water molecules and dissolved substances in the solution. Industrial nanofiltration membranes have a wide range of applications. In water treatment, it can be used to remove suspended solids, microorganisms, organic matter, and heavy metal ions from water, thus improving water quality. In food and beverage processing, it can be used to concentrate fruit juice, separate whey, remove impurities, etc. In the pharmaceutical and chemical industry, it can be used for separating and purifying drugs, removing impurities, recovering solvents, and so on.

Specification
Working Principle
Structure
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Specification

Download Data Sheet

NF 90 Series – NF Membrane
NF 150 Series – NF Membrane
NF 280 Series – NF Membrane
NF 500 Series – NF Membrane

Product Dimensions

Table 1: NF-90 Series NF Membrane Dimensions
Membrane Model	A inch (mm)	B inch (mm)	C inch (mm)	D inch (mm)
SM NF-90-8040-400	40 (1,016)	/	1.125 (29)	7.9 (201)
SM NF-90-4040-82	37.9 (963)	1.05 (26.7)	0.75 (19)	3.9 (99)

Product Specifications

Table 2: NF-90 Series NF Membrane Specifications
Type	Active Area ft² (m²)	Stabilized Rejection Rate %	Flux gpd (m³/d)
SM NF-90-8040-400	400 (37.2)	>98.5	8,200 (31)
SM NF-90-4040-82	82(7.6)	>98.5	1,580 (6)
Test Conditions: 0.48 MPa (70 psi) pressure, 25 °C (77 °F), 2,000 ppm MgSO₄, pH = 8, Recovery: 15%

Product Highlights

Excellent monovalent salt selective passage and polyvalent salt removal performance
Effective removal of pesticides, herbicides, TOC and THM precursors, etc.
Separation, concentration, and recovery of economically valuable salts, precious metals, and small molecular organics
Salt removal under ultra-low pressure and low energy consumption

Operating Limits

Maximum Operating Pressure: 41 bar (600 psi)
Maximum Operating Temperature: 45 °C (113 °F)
Maximum Element Pressure Drop: 1.0 bar (15 psi)
pH Range Continuous Operation: 3–10
pH Range Short-Term Cleaning: 1–13
Maximum Feed SDI (SDI₁₅): 5.0
Free Chlorine Tolerance: < 0.1 ppm

NF 150 series – NF membrane size drawing

Product Dimensions

Table 3: NF-150 Series NF Membrane Dimensions
Membrane Model	A inch (mm)	B inch (mm)	C inch (mm)	D inch (mm)
SM NF-150-8040-400/34	40 (1,016)	/	1.125 (29)	7.9 (201)
SM NF-150-4040-82	37.9 (963)	1.05 (26.7)	0.75 (19)	3.9 (99)

Product Specifications

Table 4: NF-150 Series NF Membrane Specifications
Type	Active Area ft² (m²)	Stabilized Rejection Rate %	Flux gpd (m³/d)
SM NF-150-8040-400/34	400 (37.2)	>98	8,950 (34)
SM NF-150-4040-82	82 (7.6)	>98	1,850 (7)
Test Conditions: 0.48 MPa (70 psi) pressure, 25 °C (77 °F), 2,000 ppm MgSO₄, pH = 8, Recovery: 15%

Product Highlights

Fill the gap in the cut-off molecular weight range of the existing NF membranes
Suitable for the separation of fine materials, decolorization, the separation of small molecular organic matter,monovalent and multivalent salts
Superior chemical stability and strong fouling resistance

Operating Limits

Maximum Operating Pressure: 41 bar (600 psi)
Maximum Operating Temperature: 45 °C (113 °F)
Maximum Element Pressure Drop: 1.0 bar (15 psi)
pH Range Continuous Operation: 3–10
pH Range Short-Term Cleaning: 1–12
Maximum Feed SDI (SDI₁₅): 5.0
Free Chlorine Tolerance: < 0.1 ppm

NF 280 series – NF membrane size drawing

Product Dimensions

Table 5: NF-280 Series NF Membrane Dimensions
Membrane Model	A inch (mm)	B inch (mm)	C inch (mm)	D inch (mm)
SM NF-280-8040-400	40 (1,016)	/	1.125 (29)	7.9 (201)
SM NF-280-4040-82	37.9 (963)	1.05 (26.7)	0.75 (19)	3.9 (99)

Product Specifications

Table 6: NF-280 Series NF Membrane Specifications
Type	Active Area ft² (m²)	Stabilized Rejection Rate %	Flux gpd (m³/d)
SM NF-280-8040-400	400 (37.2)	>97	12,410 (47)
SM NF-280-4040-82	82 (7.6)	>97	2,430 (9.2)
Test Conditions: 0.48 MPa (70 psi) pressure, 25 °C (77 °F), 2,000 ppm MgSO₄, pH = 8, Recovery: 15%

Product Highlights

High flux
High removal of TOC and THM precursors
Excellent softening and decolorizing properties
Ultra-low operating pressure effectively reduces power consumption of membrane systems.

Operating Limits

Maximum Operating Pressure: 41 bar (600 psi)
Maximum Operating Temperature: 45 °C (113 °F)
Maximum Element Pressure Drop: 1.0 bar (15 psi)
pH Range Continuous Operation: 3–10
pH Range Short-Term Cleaning: 1–12
Maximum Feed SDI (SDI₁₅): 5.0
Free Chlorine Tolerance: < 0.1 ppm

NF-500 series – NF membrane size drawing

Product Dimensions

Table 7: NF-280 Series NF Membrane Dimensions
Membrane Model	A inch (mm)	B inch (mm)	C inch (mm)	D inch (mm)
SM NF-500-8040-400	40 (1,016)	/	1.125 (29)	7.9 (201)
SM NF-500-4040-82	37.9 (963)	1.05 (26.7)	0.75 (19)	3.9 (99)

Product Specifications

Table 8: NF-500 Series NF Membrane Specifications
Type	Active Area ft² (m²)	Stabilized Rejection Rate %	Flux gpd (m³/d)
SM NF-500-8040-400	400 (37.2)	>90	13,200 (50)
SM NF-500-4040-82	82 (7.6)	>90	2,900 (11)
Test Conditions: 0.48 MPa (70 psi) pressure, 25 °C (77 °F), 2,000 ppm MgSO₄, pH = 8, Recovery: 15%

Product Highlights

High flux
Suitable for decolorization and COD removal

Operating Limits

Maximum Operating Pressure: 41 bar (600 psi)
Maximum Operating Temperature: 45 °C (113 °F)
Maximum Element Pressure Drop: 1.0 bar (15 psi)
pH Range Continuous Operation: 3–10
pH Range Short-Term Cleaning: 1–12
Maximum Feed SDI (SDI₁₅): 5.0
Free Chlorine Tolerance: < 0.1 ppm

Working Principle

The feed water under differential pressure enters the pressure vessel from the feed end of the NF membrane. Through the penetration of the membrane surface, impurities such as suspended solids, colloids, bacteria, viruses, pigments, hardness, and high valent ions are separated from the feed water. The permeate then enters the center tube in the middle of NF membrane elements. Meanwhile, the retained concentrate flows out through the concentrate tube at the end of the pressure vessel and then enters the next pressure vessel for further permeation, partial recycling, or treatment as wastewater.

Structure

Table 9: Structure, Material & Function of NF Membrane
Structure	Central Collector Tube	Feed Water Carrier	Membrane	Permeate Carrier	Brine Sealing Ring	End Cap
Material	ABS resin, PPE, PPO, PSU, PVC	Grade A special PET;Grade B coated PET,Grade C PET + specialPET	PA,compositemembrane	PET	EPDM (EPDM copolymer / rubber)	ABS
Function	Small holeson the tubeare usedto collectpermeate.	Combine membraneand feed water carriertogether to form afeed water channel toensure the water flowevenly to all cornersof the membranesurface	Effectivelyremoveinorganic saltsin the water	It can avoidmembraneadhesionand maintaina smoothpermeatechannel evenunder a higherpressure.	Brine sealing ring canonly be installed on theinlet port to prevent theconcentrate backflow.	It reduces the feedresistance andmakes the fluidevenly distributed. Meanwhile, itspressure resistantcapacity is alsoimproved by 50%; End cap hot meltrotary welding processfurther improves thedifferential pressureresistant capacity ofthe integrated ROmembranes.

Notes

Permeate flow for individual elements may vary ±15% from the value specified.
Active membrane area range guarantees ±4%.
Stabilized salt rejection is generally achieved within 24–48 hours of continuous use, depending upon feed water characteristics and operating conditions.

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Here are product catalogue and data sheet for your reference. more information just contact us.