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Nanofiltration Membranes

The “NFX” Nanofiltration membrane provides high quality liquid separation with tremendous efficiency. NFX membranes have an approximate molecular weight cut-off of 150-300 Dalton with an average MgSO4 rejection of 99% or higher. The NFX membrane is ideal for rejecting divalent and multivalent ions, while monovalent ion rejection is dependent on the concentration in the feed stream.

The NFX membrane operates at lower pressures than reverse osmosis membranes, offering lower energy and equipment costs for applications that do not require high salt rejection rates.

Synder NFX membranes greatly reduce levels of heavy metals, hardness, nitrates, sulfates, tannins, turbidity, color and TDS including moderate levels of salt from feed water streams. In addition, pH is virtually unchanged from the incoming source so the permeate is not aggressive and will not cause increased corrosion.

NFX Product Specification
Synder Model # Average Permeate Flow GPD (m3/day)1,2 Minimum MgSO4 rejection1,2 Spacer Active Area ft2(m2) Outerwrap
NFX-2540/30-BM 670 99.0% 30 24 (2.2) Sanitary Net
NFX-2540/46-BM 430 99.0% 46 16 (1.5) Sanitary Net
NFX-2540/30-HM 670 99.0% 30 24 (2.2) Fiberglass
NFX-2540/46-HM 430 99.0% 46 16 (1.5) Fiberglass
NFX-4040/30-HM 2,400 99.0% 30 82 (7.6) Fiberglass
NFX-3840/30-BF 2,400 99.0% 30 85 (7.9) Sanitary Net
NFX-3840/46-BF 1,600 99.0% 46 63 (5.8) Sanitary Net
NFX-4040/30-HF 2,400 99.0% 30 87 (8.1) Fiberglass
NFX-4040/46-HF 1,600 99.0% 46 65 (6.0) Fiberglass
NFX-8040/30-BF 8,400 99.0% 30 347 (32.1) Sanitary Net
NFX-8040/46-BF 6,500 99.0% 46 270 (25.1) Sanitary Net
NFX-8040/30-HF 9,400 99.0% 30 370 (34.4) Fiberglass
NFX-8040/46-HF 6,500 99.0% 46 272 (25.3) Fiberglass
1Average salt rejection after 24 hours operation. Individual flow rate may vary ±25%
2Testing Conditions: 2,000ppm MgSO4 solution at 110psi (760kPa) operating pressure, 77°F (25°C), 15% recovery.

Dimensions And Weights
Synder Model # Dimensions Dry Weight lbs (kg)
A
Length
B
ELEMENT OD
ID
PERM TUBE ID
(FEMALE)
OD
PERM TUBE OD
(MALE)
C
TUBE EXT LENGTH
(MALE)
NFX-2540/30-BM 40.0” (1,016 mm) 2.4” (61 mm) - 0.75” (19 mm) 1” (Both Ends) 4.0 (1.8)
NFX-2540/46-BM 40.0” (1,016 mm) 2.4” (61 mm) - 0.75” (19 mm) 1” (Both Ends) 4.0 (1.8)
NFX-2540/30-HM 40.0” (1,016 mm) 2.4” (61 mm) - 0.75” (19 mm) 1” (Both Ends) 4.0 (1.8)
NFX-2540/46-HM 40.0” (1,016 mm) 2.4” (61 mm) - 0.75” (19 mm) 1” (Both Ends) 4.0 (1.8)
NFX-4040/30-HM 40.0” (1,016 mm) 3.88” (99 mm) - 0.75” (19 mm) 1” (Both Ends) 12.0 (5.5)
NFX-4040/30-BF 40.0” (1,016 mm) 3.9” (99 mm) 0.625” (15.9 mm) - - 12.0 (5.5)
NFX-4040/46-BF 40.0” (1,016 mm) 3.9” (99 mm) 0.625” (15.9 mm) - - 12.0 (5.5)
NFX-4040/30-HF 40.0” (1,016 mm) 3.9” (99 mm) 0.625” (15.9 mm) - - 12.0 (5.5)
NFX-4040/46-HF 40.0” (1,016 mm) 3.9” (99 mm) 0.625” (15.9 mm) - - 12.0 (5.5)
NFX-8040/30-BF 40.0” (1,016 mm) 7.9” (201 mm) 1.125” (28.6 mm) - - 29.0 (13.2)
NFX-8040/46-BF 40.0” (1,016 mm) 7.9” (201 mm) 1.125” (28.6 mm) - - 29.0 (13.2)
NFX-8040/30-HF 40.0” (1,016 mm) 7.9” (201 mm) 1.125” (28.6 mm) - - 29.0 (13.2)
NFX-8040/46-HF 40.0” (1,016 mm) 7.9” (201 mm) 1.125” (28.6 mm) - - 29.0 (13.2)




Note:
Additional dimensions and custom sizes are
available. Please contact Synder for further details.
Operating and CIP Parameters
Typical Operating Flux 7-24 GFD (12-42 LMH)
Membrane Type NFX, Proprietary PA TFC
Membrane Construction Spiral-Wound with netted or fiberglass outer wrap
Maximum Operating Pressure 600psi (4,137kPa) if T<95°F (35°C)
435psi (3,000kPa) if T>95°F (35°C)
Maximum Temperature Continuous Operation: 122°F (50°C)
Clean-In-Place (CIP): 104°F (40°C)
pH Range Continuous Operation: 3-9
Clean-In-Place (CIP): 2-10.5
Maximum Pressure Drop Per Element: 15psi (103kPa)
Per Housing: 60psi (414kPa)
Maximum Feed SDI 5-6
Maximum Feed Turbidity 1-1.25 NTU
Chlorine Tolerance 500 ppm hours, dechlorination recommended