NF series0 pages
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kySanitary Spiral Membranes for Nanofiltration
ky NF series
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The Alfa Laval nanofiltration membranes are durable membranes
designed to reject organics with a molecular weight above 200
while partially passing monovalent salts. The elements are based
on a composite polyamide type membrane. The sanitary, full-fit
configuration is optimal for cleaning and minimizes “stagnant spaces”.
All spiral elements are shipped dry.
Designation Process Characteristics MgSO4 rejection
Alfa Laval NF97 NF 97%*
Alfa Laval NF99 NF 98%*
Alfa Laval NF99 HF NF
Polyamide
type thin film
composite on
polyester
98%*
* Measured on 2000 ppm MgSO4, 9 bar, pH 8, 25°C (131 psi, 77°F),
15% recovery.
Spiral membrane designation:
Alfa Laval NF97-3838/30
Alfa Laval NF97 = Membrane type
38 = Outer diameter of element (3.8")
38 = Element length (38")
30 = Feed spacer thickness
All components comply with EU Commission Directive 2002/72/EC
and FDA regulations (CFR), Title 21.
L1
L2
ID
OD TD 710-001
....
Dimensions
OD = outer diameter of element
L1 = total length of element without ATD
ID = diameter of ATD socket
L2 = depth of ATD socket
OD L 1 ID L 2
Element size
mm (inches) mm (inches) mm (inches) mm (inches)
2517 64.0-65.0 (2.52-2.56) 432 (17) 21.00 (0.827) 26.0 (1.024)
3838 95.0-96.5 (3.74-3.80) 965 (38) 21.10 (0.831) 51.0 (2.0)
3840 95.0-96.5 (3.74-3.80) 984 (38.75) 21.10 (0.831) 51.0 (2.0)
8038 198.5-201.5 (7.81-7.93) 965 (38) 28.58 (1.125) 51.0 (2.0)
* Overall length with two ATD’s: 1016 mm (ATD: 25.4 mm)