GE P&W Spiral Wound Membranes - MUNI NF Series User Manual
Muni nf series, Fact sheet, Figure 1: high flow rate at low pressure drop
Fact Sheet
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FS1274EN.doc Nov-13
MUNI NF Series
Membrane Elements for Municipal Drinking Water Plants
The GE Water & Process Technologies MUNI NF se-
ries is engineered to provide a low pressure and
cost effective nanofiltration alternative to standard
RO treatment. The resulting product is virtually free
of any harmful biological matter. Performance is
characterized by hardness reduction, color removal,
and organic pollutants reduction (such as the pre-
cursors to THM).
The MUNI NF membrane element is tested and cer-
tified by NSF international against NSF/ANSI Stand-
ard 61 for material requirements only.
The MUNI NF membrane is an element following a
100% Wet Test Quality Assurance.
Figure 1: High Flow Rate at Low Pressure Drop
Table 1: Element Specification
Membrane
Thin-Film Membrane (TFM*)
Model
Average
permeate flow
gpd (m
3
/day)
1,2
Average
MgSO
4
rejection
1,2
MUNI-NF-400
11,500 (43.5)
98.0%
1
Average salt rejection after 24 hours operation. Individual flow rate may vary
+25%/-15%.
2
Testing conditions: 2,000ppm MgSO
4
solution at 110psi (760kPa) operating
pressure, 77 °F, pH 7.5 and 15% recovery.
Model
Active area
ft
2
(m
2
)
Outer wrap
Part
number
MUNI-NF-400
400 (37.2)
Fiberglass
1242400
Figure 2: Element Dimensions Diagram – Female
Table 2: Dimensions and Weight
Model
1
Dimensions, inches (cm)
Boxed
A
B
2
C
3
Weight
lbs (kg)
MUNI-NF-400
40.0
(101.6)
1.125
(2.86)
7.9
(20.1)
32
(14.5)
1
These elements are dried and bagged before shipping.
2
Internal diameter.
3
The element diameter (dimension C) is designed for optimum performance in GE
Water & Process Technologies pressure vessels. Others pressure vessel dimension
and tolerance may result in excessive bypass and loss of capacity.
Table 3: Operating and CIP parameters
Typical Operating Pressure
70-300psi (483 – 2,069kPa)
Typical Operating Flux
10-20GFD (15-35 LMH)
Maximum Operating Pressure
600psi (4,137kPa)
Maximum Temperature
Continuous Operation: 113°F (45°C)
Clean-In-Place (CIP): 104°F (40°C)
Minimum Crossflow
30gpm (6.8m3/h)
pH Range
Continuous Operation: 3.0-9.0,
Clean-In-Place (CIP): 2.0-10.5
Maximum Pressure Drop
Over an element: 12psi (83kPa)
Per housing: 50psi (345kPa)
Chlorine Tolerance
1,000+ ppm-hours,
dechlorination recommended
Feedwater
NTU < 1
SDI < 5
Recommended single element
recovery
< 15 %