NFG (TFC 600-800Da) – Industrial

Nanofiltration TFC Spiral-Wound Element
NFG (600 – 800Da)

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 monovolent and divalent ions, Synder’s NF membranes have been developed specifically for specialty process applications.

Synder’s NFG nanofiltration membrane provides high flux and moderate levels of lactose and MgSO4 rejection. With a molecular weight cut-off of 600 to 800 Daltons, NFG is ideal for applications requiring a large amount of salt removal and are commonly used in the dairy industry for milk processing. Other applications include demineralization and concentration of lactose and the desalination of dyes and optical brighteners.

NF SERIES BENEFITS

Operation 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

Element Specifications

MEMBRANE SPECS

Model	Polymer	Approx. Molecular Weight Cutoff	Typical Operating Flux	Min Lactose Rejection¹	Avg MgSO₄ Rejection²	Avg NaCl Rejection³
NFG	Proprietary PA TFC	600-800Da	55-60 GFD	60.0%	50.0%	10.0%

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 NaCl solution 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	4-9
pH Range @ Ambient Temperature	4-10

Cleaning Parameters
Maximum Temperature (Short term <30min)	50°C (122°F)
pH Range @ Max Temperature	3-10
pH Range @ Ambient Temperature	3-10.5

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″	1812TM	1.8″(4.6)	11.75″(29.8)	0.675″(1.71)	0.75″(1.90)	1.0(0.9)
2.5″	2519HF 2540TM 2540HF 2540HM	2.4″(6.1) 2.4″(6.1) 2.4″(6.1) 2.4″(6.1)	19.0″(48.3) 40.0″(101.6) 40.0″(101.6) 40.0″(101.6)	0.625″(1.59) 0.75″(1.90) 0.625″(1.59) 0.75″(1.90)	– 1.0″ (2.54) – 1.0 (2.54)	3.0(1.4) 6.0(2.7) 6.0(2.7) 6.0(2.7)
4″	4040TM 4040HM 4040HF	3.9″ (9.9) 3.9″ (9.9) 3.9″ (9.9)	40.0″ (101.6) 40.0″ (101.6) 40.0″ (101.6)	0.75″ (1.90) 0.75″ (1.90) 0.625″ (1.59)	– 1.0″ (2.54) –	12.0(5.5) 12.0(5.5) 12.0(5.5)
8″	8040	7.9″ (20.1)	40.0″ (101.6)	1.125″ (2.86)	–	35.0(15.9)

Recommended Element Cross Flow Rate

Element

Feed Spacer (in mils)

1.8″

m³/hr
gpm

0.4
1.8

0.5
2.0

0.6
2.4

0.6
2.5

0.6
2.6

2.5″

m³/hr
gpm

1.2
5

1.4
6

1.6
7

1.8
8

2.1
9

4″

m³/hr
gpm

2
10

4
18

5
21

5
23

6
24

8″

m³/hr
gpm

10
43

11
48

13
55

14
61

15
64

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

Synder_SpecificMembranes-img1

NF Membrane Area(SQ. FT.)

Element

Feed Spacer (in mils)

1812TM

3.4

2.6

2.0

1.6

2540HF

2540HM

4040HF

4040HM

8040HF

440

380

293

227

193

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.