Low Energy Brackish Water RO Elements - AK8040F-400 #3039161


The AK-Series Low Pressure Brackish Water 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 pressures as low as 100 psi (689 kPa).

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Technical Data

Membrane: A-Series, thin-film membrane (TFM*)

Element Specification

Average permeate flow gpd (m3/d)                11,000 (41.6)

Average NaCl rejection (1)(2)                            99.0%

Minimum NaCl rejection (1)(2)                          98.0%                      

Membrane area ft2 (m2)                                    400 (37.2)

Outer wrap                                                         Fiberglass

Part Number                                                      3039161

(1) Average salt rejection after 24 hours operation. Individual flow rate may vary ±20%.

(2) Testing conditions: 500ppm NaCl solution at 115psi (793kPa) operating pressure, 77°F (25°C), pH7.5 and 15% recovery.

Dimensions and Weight

Type                                                                    Female

Dimensions, inches (cm)                                   40.0 x 1.125 x 7.9 (101.6 x 2.86 x 20.1)

Boxed Weight lbs. (kg)                                     35 (16)         


Operating and CIP parameters

Typical Operating Pressure                              100 psi (689 kPa)

Typical Operating Flux                                     10-20 GFD (15-35LMH)

Maximum Operating Pressure                         600 psi (4,136 kPa)

Maximum Temperature                                    Continuous operation: 122°F (50°C),

                                                                            Clean In Place (CIP): 122°F (50°C)

pH Range                                                           Optimum rejection: 7.0-7.5,

                                                                            Continuous operation: 2.0-11.0,

                                                                            Clean In Place (CIP): 1.0-13.0(1)

Maximum Pressure Drop                                  Over an element: 12 psi (83 kPa)

                                                                            Per housing: 50 psi (345 kPa)

Chlorine Tolerance                                            1,000+ ppm x hours,

                                                                            dechlorination recommended

Feedwater                                                          NTU < 1

                                                                            SDI15 < 5