GE P&W Spiral Wound Membranes - AK HR Series - Manual

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FSpwAKHRSeries_EN Sep 11
Fact Sheet
AK HR Series
High Rejection Low Energy Brackish Water RO Elements
The A-Series proprietary thin-film reverse osmosis
membrane elements are characterized by high flux
and high sodium chloride rejection. AK HR low
pressure brackish elements are selected when high
rejection and low operating pressures are desired.
These elements allow significant energy savings
since good rejection is achieved at operating pres-
sures as low as 100 psig (689 kPa).
These elements are recommended for low brackish
water with salt concentration (TDS) levels up to
5,000mg/l. In turn, AK HR elements produce a per-
meate quality close to a standard brackish mem-
brane element at a much lower pressure.
Table 1: Element Specification
1 Average salt rejection after 24 hours operation. Individual flow rate
may vary +25%/-15%.
2 Testing conditions: 500ppm NaCl solution at 115psi (793kPa) operating
pressure, 77°F (25°C), pH7.5 and 15% recovery.
Model Active area
ft 2 (m 2 )
Outer wrap
Part
number
AK-90 90 (8.4) Fiberglass 3056678
AK-365 365 (33.9) Fiberglass 3056679
AK-400 400 (37.2) Fiberglass 3056680
AK-440 440 (40.9) Fiberglass 3056681
AK-1600 1600 (148.6) Fiberglass 3056682
Table 2: Operating and CIP parameters
3 SDI is measured on a non-linear scale using a 0.45 micron filter paper.
Additionally, finer colloids, particulates and microorganisms that pass
through the filter paper and not measured in the SDI test, will potential-
ly foul the RO element. For performance consistency and project war-
ranty, please use Winflows projection software and consult your Filters
with Membranes representative.
Figure 1a: Element Dimensions Diagram – Male
Figure 1b: Element Dimensions Diagram – Female
Membrane Thin-film membrane (TFM*)
Model
Average
permeate flow
gpd (m3/day) 1,2
Average
NaCl
rejection 1,2
Minimum
NaCl
rejection 1,2
AK-90 2200 (8.3) 99.5% 99.0%
AK-365 9600 (36.3) 99.5% 99.0%
AK-400 10500 (39.7) 99.5% 99.0%
AK-440 11500 (43.5) 99.5% 99.0%
AK-1600 42000 (159.0) 99.5% 99.0%
Typical Operating Pressure 120 psi (830 kPa)
Typical Operating Flux 10-20GFD (15-35LMH)
Maximum Operating Pressure 400 psi (2,758 kPa)
Maximum Temperature Continuous operation: 122°F (50°C)
Clean-In-Place (CIP): 122°F (50°C)
pH range Optimum rejection pH: 7.0-7.5,
Continuous operation: 4.0-11.0,
Clean-In-Place (CIP): 2.0-11.5
Maximum Pressure Drop Over an element: 12 psi (83 kPa)
Per housing: 50 psi (345 kPa)
Chlorine Tolerance 1,000+ ppm-hours,
dechlorination recommended
Feedwater 3 NTU < 1
SDI < 5