NFS (TFC 100-250Da)

Sanitary Nanofiltration Spiral-Wound Element
NFS (100 – 250Da)

Synder Filtration’s Nanofiltration membranes are engineered and designed to provide superior separation performance for various application needs. Known for its stable flux and wide range of rejection to monovalent and divalent ions, Synder’s NF membranes have been developed specifically for specialty process applications.

Synder’s NFS nanofiltration membrane was developed specifically to meet requirements for seawater sulfate removal within the oil and gas industry. With a 30% increase in efficiency versus leading competitors, NFS offers excellent sulfate removal and potential reductions in nanofiltration footprint. The NFS membrane also has the lowest molecular weight cut-off in the entire nanofiltration line, with a range from 100 to 250 Daltons. Other common applications for this membrane include demineralization and concentration of lactose, whey concentration and deashing, and amoxicillin removal.

NF SERIES BENEFITS

Competitive flux as the current industry standard NF membranes
Excellent MgSO4 and lactose rejection
Operate at lower pressures than Reverse Osmosis membranes and still achieve excellent rejection of divalent and multivalent ions
NF membranes greatly reduce levels of hardness, nitrates, sulfates, tannins, turbidity, color, TDS, and moderate levels of salt from feed water streams

COMMON APPLICATIONS

Demineralization & concentration of lactose
Seawater sulfate removal

Element Specifications

MEMBRANE SPECS

Model	Polymer	Approx. Molecular Weight Cutoff	Typical Operating Flux	Min Lactose Rejection¹	Avg MgSO4 Rejection²	AverageNaCl Rejection³
NFS	Proprietary PA TFC	100-250Da	30-40 GFD	99.5%	99.5%	50-55%

¹Test Conditions: 2,000ppm Lactose solution at 110psi (760kPa) operating pressure, 77°F (25°C)

²Test Conditions: 2,000ppm MgSO4 solution at 110psi (760kPa) operating pressure, 77°F (25°C)

³Test Conditions: 2,000ppm NaClsolution at 110psi (760kPa) operating pressure, 77°F (25°C)

RECOMMENDED OPERATING PARAMETERS

Operating Parameters
Maximum Operating Pressure	600psi (4,137kPa) if T < 95°F (35°C) 435psi (3,000kPa) if T > 95°F (35°C)
Maximum Temperature	50°C (122°F)
pH Range @ Max Temperature	3-9.5
pH Range @ Ambient Temperature	3-10.5

Cleaning Parameters
Maximum Temperature (Short term <30min)	40°C (104°F)
pH Range @ Max Temperature	2-11
pH Range @ Ambient Temperature	2-11

Pressure Drop	PSI
Maximum per Element	15psi (103kPa)
Maximum per Housing	60psi (414kPa)

Chlorine Tolerance

500ppm hours, dechlorination recommended

Element Dimensions & Weight

Element	Model No.	Diameter (B) in(cm)	Length (A) in(cm)	P.W.T. ID/OD in(cm)	Tube Extension (C) in cm)	Dry Weight lb(kg)
1.8"	1812F	1.8(4.6)	12.0(30.5)	0.63(1.6)	–	1.0(0.5)
2.5"	2540F 2540M	2.4(6.1) 2.4(6.1)	40.0(101.6) 40.0(101.6)	0.63(1.6) –	– 1 (2.54) (Both Ends)	4.0(1.8) 4.0(1.8)
3.8"	3838 3838.75	3.8(9.7) 3.8(9.7)	38.0(96.5) 38.0(98.4)	0.83(2.1) 0.81(2.1)	– –	9.0(4.1) 9.0(4.1)
8"	8038 8040	7.9(20.1) 7.9(20.1)	38.0(96.5) 40.0(101.6)	1.13(2.9) 1.13(2.9)	– –	29.0(13.2) 29.0(13.2)

Recommended Element Cross Flow Rate

Element

Feed Spacer (in mils)

1.8"

m³/hr
gpm

0.7
3

0.9
4

2.5"

m³/hr
gpm

1.4
6

1.6
7

1.8
8

3.8"

m³/hr
gpm

6
26

7
29

8
33

8
36

9
38

m³/hr
gpm

16
68

18
76

21
89

23
98

24
103

The recommended cross flow rate will be subject to differential pressure limitations and specific applications.

NF Membrane Area(SQ. FT.)

Element

Feed Spacer (in mils)

1812F

4.5

4.0

2.9

N/A

2540F

N/A

2540M

N/A

3838

100

3838.75

104

8038

450

400

300

240

200

8040

450

400

300

240

200

TECHNICAL NOTES

For element sizes not listed, please call or email Synder Filtration for details. We can design an element to fit your exact needs – just specify the element outer diameter (OD) or vessel/housing inner diameter (ID), element inner diameter (ID), and length. Elements are also available with or without a controlled bypass tail. Additional feed spacers are also available. Trials should be conducted to determine optimal application conditions.