The RO B400 HF reverse osmosis membrane element is a spiral-wound composite polyamide membrane element. It is mainly used in industrial water treatment, such as desalination of brackish water and low-salinity water, for use as boiler feed water and process water.

Basic Information

Metric Units    US Units

Feed spacer thickness  0.8 mm  31 mil

Effective membrane area  37.2 m²  400 ft²

Average salt rejection  99.5 %  99.5 %

Minimum salt rejection  99.0 %  99.0 %

Average permeate flow  39.9 m³/d  10,500 gpd

Minimum permeate flow  31.9 m³/d  8,400 gpd

Test conditions for membrane elements: Pressure 15.5 bar (225 psi), NaCl solution concentration 2,000 mg/l, operating temperature 25 °C (77 °F), operating pH 7, single element recovery 15%.

Operating Conditions

Metric Units    US Units

Operating pressure  41 bar  600 psi

Operating temperature  45 °C  113 °F

Maximum feed water SDI  5  5

Maximum feed flow  18.0 m³/h  80 gpm

Minimum concentrate flow  2.7 m³/h  12 gpm

Operating pH range  2 – 11  2 – 11

Chemical cleaning pH range  1 – 12  1 – 12

Max. pressure drop per element  1.0 bar  15 psi

Max. pressure drop per pressure vessel  3.5 bar  50 psi

Maximum free chlorine in feed water  0.1 ppm  0.1 ppm