CSM Nanofiltration NF Membrane
Specification
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CSM NF MEMBRANE, The approved Nanofiltration membrane in the whole world
NE4040-90
Nanofiltration membrane element with high monovalent ion rejection
Features
CSM NE90 elements with 90 % monovalent ion rejection and more than 99 % rejection of divalent ions are useful
for water softening, removing endocrine disruption chemicals from drinking water and also food processing in
small size systems.
Product Specifications
Permeate Flow rate1) : 1, 600 GPD ( 6.0 m3/ day)
Monovalent Ion Rejection ( NaCl) 1) : 85~ 95 %
Divalent Ion Rejection ( MgSO4) 2) : 99.5 %
Effective Membrane Area : 85 ft2 ( 7.9 m2)
1. The stated performance is initial data taken after 30 minutes of operation based on the following monovalent test conditions; 2, 000 mg/ L NaCl solution at 75 psig ( 0.5 MPa) applied pressure, 15 % recovery, 77 oF ( 25 oC) and pH 6.5~ 7.0.
2. The stated performance is initial data taken after 30 minutes of operation based on the following divalent test conditions; 2, 000 mg/ L MgSO4 solution at 75 psig ( 0.5 MPa) applied pressure, 15 % recovery, 77 oF ( 25 oC) and pH 6.5~ 7.0.
3. All elements are vacuum sealed in a polyethylene bag containing 1.0 % SBS ( Sodium bisulfite) solution and packaged individually in a cardboard box.
Product Description
Membrane Type : Thin-film Composite
Membrane Material : PA ( Polyamide)
Membrane Surface Charge : Negative
Element Configuration : Spiral-Wound, FRP wrapping
Operating Limits
Max. Pressure drop / Element 15 psi ( 0.1 MPa)
Max. Pressure drop / 240â vessel 60 psi ( 0.42 Mpa)
Max. Operating pressure 600 psi ( 4.14 MPa)
Max. Feed flow rate 18 gpm ( 4.09 m3/ hr)
Min. Concentrate flow rate 4 gpm ( 0.91 m3/ hr)
Max. Operating temperature 113 oF ( 45 oC)
Operating pH range 3.0 ~ 10.0
CIP pH range 2.0 ~ 11.0
Max. Turbidity 1.0 NTU
Max. SDI ( 15 min) 5.0
Max. Free Chlorine concentration 0.1 mg/ L
Design Guideline for Various Water Source
Waste water ( SDI < 5) 8 ~ 12 gfd
Waste water pretreated by UF ( SDI < 3) 10 ~ 14 gfd
Seawater, open intake ( SDI < 5) 7 ~ 10 gfd
High salinity well water ( SDI < 3) 8 ~ 12 gfd
Surface water ( SDI < 5) 12 ~ 16 gfd
Surface water ( SDI < 3) 13 ~ 17 gfd
Well water ( SDI < 3) 13 ~ 17 gfd
RO/ UF permeate ( SDI < 1) 21 ~ 30 gfd
Saturation Limits for Salts
CaSO4 230 % saturation
SrSO4 800 % saturation
BaSO4 6, 000 % saturation
SiO2 100 % saturation
⢠Above values are saturation limit at the tail end of the membrane elements for each sparingly soluble salts with proper scale inhibitor
CaCO3 Scaling potential limits as LSI or SDSI
Without scale inhibitor < -0.2
LSI ( SDSI) with SHMP < + 0.5
LSI ( SDSI) with special inhibitor1 < + 1.5
SDSI with any inhibitor < + 0.5
⢠Special inhibitor means one of approved organic inhibitors. It should be approved from real plant for more than three years.
Indotrade Priority 14th Year
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