Product Line Description

SW22-8040/SW22-4040 elements can separate salts from water and increase permeability while offering superior salt rejection. They are ideal for use in large-scale industrial and municipal water treatment systems.

Brands HUAMO
Active Membrane Area 400 ft²
37 m²
Stabilized Salt Rejection 99.5 %
Minimum Salt Rejection 99.0 %
Permeate Flow Rate 10,500 gal/d
40 m³/d
Testing Conditions
Feed Water Pressure 1.55 MPa
225 psi
Feed Water Temperature 25 ºC
77 ºF
Feed Water Concentration (Sodium Chloride (NaCl)) 32,000 ppm
Potential of Hydrogen (pH) of Feed Water 8 pH
Permeate Recovery 15 %
Dimension A 40 in
1016 mm
Dimension C 1.125 in
29 mm
Dimension D 7.9 in
201 mm
Operation Condition
Maximum Operating Pressure 55 bar
800 psi
Maximum Operating Temperature 45 ºC
113 ºF
Maximum Pressure Dropper Element 1.0 bar
15 psi
Potential of Hydrogen (pH) Range of Feed Water During Continuous Operation 2 to 11 pH
Potential of Hydrogen (pH) Range of Feed Water During Chemical Cleaning 1 to 13 pH
Maximum Feed Silt Density Index (SDI15) 5.0
Free Chlorine Tolerance < 0.1 ppm
Suitable for
  1. New-Built or Existing RO Systems.
  2. High Quality Permeate while Minimizing Unit Cost.
  3. Various Operating Conditions with 4″ and 8″ Elements.
  1. Permeate flow rates for individual elements may vary ±15%.
  2. Membrane active areas may vary ±4%.
  3. Stabilized salt rejection is generally achieved after continuous using for 24-48 hours, which depending on feed water qualities and operating conditions.