SPNF Specialized Spiral-Wound Nanofiltration Membrane Elements

SPNF 380-41-270 spiral-wound nanofiltration membrane elements efficiently separate monovalent and divalent salts from industrial wastewater, enabling the recycling and reuse of salts, as well as wastewater reuse.

SPNF 365-83-270 anti-pollution spiral-wound nanofiltration membrane elements are used for separating high TDS, high-salt wastewater, monovalent and divalent salts in industrial wastewater, achieving further purification and concentration separation. When treating high TDS, high-salt wastewater containing monovalent ions (such as chloride ions) and divalent ions (such as sulfate ions), the pressure required may exceed 400 psi. The system operating pressure of spiral-wound nanofiltration membranes SPNF 365-83-270 is between 400 - 1200 psi, which further improves separation efficiency compared to standard pressure spiral-wound nanofiltration membranes SPNF 365-41-270.

Product advantages:

•Spiral-wound nanofiltration membranes have high selectivity, effectively intercepting divalent ions and COD, with high permeability for monovalent ions, helping to separate high-purity salt solutions while reducing concentrate volumes.

•They have a higher effective membrane area, reducing system investment under the same usage conditions.

•The membrane sheets have good antioxidant and acid-base resistance properties, ensuring long-term stable production capacity.

Membrane Element Model	Cut-off Molecular Weight Da	Effective Membrane Area m² (ft²)	Feed Grid mil (mm)	Product Water Yield GDP (m³/d)	Stable Desalination Rate %	Minimum Desalination Rate %
SPNF1HP365/34	90	365 (34)	34 (0.86)	8500 (32)	98	96
SPNF3HP365/34	270	365 (34)	34 (0.86)	10500 (40)	98	95

Testing conditions:

1）Test pressure: 100 psi (0.69 MPa)

2）Test solution temperature: 25°C

3）Test solution concentration (MgSO₄): 2000 ppm

4）Test solution pH value: 7.5

5）Recovery rate of single membrane element: 15%

产品尺寸：

All dimensions in the diagram are given in millimeters (inches).

A=1016.00mm(40”); B=201.90mm(7.95”); C=28.60mm(1.125”)

Operating limits:

1）Maximum operating pressure: 1200 psi (8.3 MPa)

2）Maximum feed water flow rate: 75 gpm (17 m³/h)

3）Maximum feed water temperature: 45°C

4）Maximum SDI15 of feed water: 5,

5）Free chlorine concentration in feed water < 0.1 ppm

6）Feed water pH range during continuous operation: 3～10

7）Feed water pH range during chemical cleaning: 2～12

8）Maximum pressure drop of a single membrane element: 15 psi (0.1 MPa)

SPNF 380-41-270 

High anti-pollution salt separation NF membrane element

Used for efficient separation of monovalent and divalent salts in industrial wastewater, achieving recycling and reuse of salts.

SPNF 365-83-270 

High anti-pollution salt separation NF membrane element

Used for separation of monovalent and divalent salts in high TDS industrial wastewater, achieving further purification and concentration separation.

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