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NMPI NF Series
 
NMPI NF Series of three layered nanofiltration membrane with molecular weight cut-off of 200~500 daltons. Divalent and multivalentions are preferentially rejected by the membrane than monovalentions. NSK Elements are used for water treatment, water softening, dye removal and concentration. A fiberglass or tape outerwrap with standard feed spacers, other materials of construction and special feed spacers or customized spec are available.
 
 ★ Design and Operating parameters 
 
Model
 
NSK98
NSL95
NHF85
Material
Thin Film Composite ( TFC )
MWCO ( Da )
 
220~250
300~400
400~500
Max Temperature ( Process / CIP )
50 ℃ ( 122 ℉ )
pH Limitations ( Process / CIP )
30~10
Flat Cell Rejection ( % )
MgSO4
 
≧ 98
≧ 95
≧ 90
NaCl
 
≧ 40%
≦ 40%
≦ 30%
Average Permeate Flux
LMH
 
50
76.4
119
GPD
 
30
45
70
Chlorine tolerance ( ppm-hrs )
1,000


※ Permeate flux and salt passage data based on the following flat cell conditions:

    2,000 ppm MgSO4  / NaCl @ 100 psi, 25 ℃.
※ Individual flux may vary ±15%. 
 
 ★ Element Spec 
 
Model
Active area
( m² )
  Recovery
( % )
Flat Cell
Rejection ( % )
Average 
Permeate Flux
MgSO4
NaCl
GPD
CMD
NSK98
1812
0.42
15
> 98
≧ 40%
120
> 0.450
2540
2.26
525
> 2.000
4040
7.20
1,800
> 6.840
8040
33.5
8,000
> 30.40
NSL95
1812
0.42
15
> 95
≦ 40%
140
> 0.530
2540
2.26
620
> 2.350
4040
7.20
2,200
> 8.340
8040
33.5
9,300
> 8.340
NHF85
1812
0.42
15
> 90
≦ 30%
150
> 0.570
2540
2.26
700
> 2.650
4040
7.20
2,500
> 9.470
8040
33.5
10,000
> 37.85

 

 ★ Element dimension 
 
Model
1812
2540
4040
8040
( inch ) -A
12.0"
40.0"
40.0"
40.0"
( inch ) -B
0.68"
0.75"
0.75"
1.15"
( inch ) -C
1.80"
2.40"
4.00"
8.00"
( inch ) -D
0.83"
1.00"
1.05"
-
( inch ) -E
10.0"
37.3"
37.9"
-
Outerwrape
TAPE / FRP
Feed Spacer Thickness
31mil、34mil、46mil