4" Sanitary Nanofiltration Elements
4" NF elements are ideal for low volume production operations or large scale pilot studies. Synder's sanitary elements are fully USDA compliant and offer excellent rejection of divalent and multivalent ions. Consistently displaying an unmatched combination of flux and rejection against the industry standard, the NFX and NFW membranes are ideal where 150-500D membrane pore sizes are required.
MEMBRANE ELEMENTS
| Membrane Model | Polymer | Approx. Molecular Weight Cutoff |
| NFX | Proprietary PA TFC | 150-300D |
| NFW | Proprietary PA TFC | 300-500D |
| Size | Membrane Area (sq. ft) |
Dimensions (OD, L, P.W.T ID, Weight) |
Recommended Cross Flow Rate |
| 3838 | 77 | 3.8", 38", 0.831", 10lb | 26 GPM (5.9 m3/h) |
| 3838.75 | 77 | 3.8", 38.75", 0.831", 10lb | 26 GPM (5.9 m3/h) |
| 4338 | 105 | 4.3", 38", 0.831", 12lb | 34 GPM (7.8 m3/h) |
*These specifications are for elements with our standard 31mil spacer. For complete product specifications for all models see our NF Sanitary Specification Sheet.
RECOMMENDED OPERATING PARAMETERS
| Parameter | Specification |
| Maximum Inlet Pressure | 600 PSI (41.37 Bar) if T<95ºF (35ºC) 435 PSI (29.99 Bar) if T>95ºF (35ºC) |
| Maximum Pressure Drop | Per Element: 15 PSI (1.03 Bar) Per Housing: 60 PSI (4.13 Bar) |
| Maximum Permeate Back Pressure | 5 PSI (0.3 Bar) |
| Maximum Operating/CIP Temperature | 122° F (50° C)/104° F (40° C) |
| pH Range (Operating @ 55°C/ CIP @ 50°C Max) |
NFX: 4-10/3-10.5 NFW: 3-9/2-10 |
| Chlorine Tolerance | 500ppm hours, dechlorination recommended |
| Maximum Feed Turbidity | 1-1.25 NTU |
| Maximum Feed SDI | NFX: 5-6 NFW: <5 |
*For expanded descriptions, please see our complete NFX or NFW Specification Sheet.![]()
This information is believed to be accurate and reliable, but is not to be construed as implying any warranty or guarantee of performance. We assume no responsibility, obligation or liability for results obtained or damages incurred through the application of the information contained herein. Refer to Standard Warranty documentation for additional information.
4" Industrial Nanofiltration Elements
Synder Filtration's 4" industrial nanofiltration elements are ideal where both 150-500D membrane pore sizes and zero bypass are a necessity. Manufactured with a durable fiberglass casing or more economical tape wrapping, Synder's elements offer an integrated ATD with multiple permeate tube options. This flexibility matched with unmatched flux and rejection, make the NFX and NFW the ideal choice for the rejection of divalent and multivalent ions.
MEMBRANE ELEMENTS
| Membrane Model | Polymer | Approx. Molecular Weight Cutoff |
| NFX | Proprietary PA TFC | 150-300D |
| NFW | Proprietary PA TFC | 300-500D |
| Size | Membrane Area (sq. ft) |
Dimensions (OD, L, Weight) |
P.W.T. ID (F) or OD (M) |
Tube Extensions Length (male model) |
Recommended Cross Flow Rate |
| 4040HF | 90 | 3.93", 40", 12lb | ID: 0.625" | N/A | 25 GPM (5.68 m3/h) |
| 4040HM | 85 | 3.9", 40", 12lb |
OD: 0.75" | 1" (both ends) | 25 GPM (5.68 m3/h) |
*These specifications are for elements with our standard 31mil spacer. For complete product specifications for all models see our NFX and NFW Specification Sheets.
RECOMMENDED OPERATING PARAMETERS
| Parameter | Specification |
| Maximum Inlet Pressure | 600 PSI (41.37 Bar) if T<95ºF (35ºC) 435 PSI (29.99 Bar) if T>95ºF (35ºC) |
| Maximum Pressure Drop | Per Element: 15 PSI (1.03 Bar) Per Housing: 60 PSI (4.13 Bar) |
| Maximum Permeate Back Pressure | 5 PSI (0.3 Bar) |
| Maximum Operating/CIP Temperature | 122° F (50° C)/104° F (40° C) |
| pH Range (Operating @ 55°C/ CIP @ 50°C Max) |
NFX: 4-10/3-10.5 NFW: 3-9/2-10 |
| Chlorine Tolerance | 500ppm hours, dechlorination recommended |
| Maximum Feed Turbidity | 1-1.25 NTU |
| Maximum Feed SDI | NFX: 5-6 NFW: <5 |
*For expanded descriptions, please see our complete NFX or NFW Specification Sheet.![]()
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This information is believed to be accurate and reliable, but is not to be construed as implying any warranty or guarantee of performance. We assume no responsibility, obligation or liability for results obtained or damages incurred through the application of the information contained herein. Refer to Standard Warranty documentation for additional information.



