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SKU: SW11-2521

SW series of sea water aromatic polyamide RO element developed by VONTRON for seawater desalination. This series of elements have the characteristics of low operating pressure, low equipment investment, good desalination performance and stability.


SW series membrane elements are generally suitable for the treatment of seawater and brackish water with high concentration. It can be used for seawater desalination, desalination of brackish water with high concentration, boiler replenishment water in power plants, wastewater reuse, concentration and recovery of high value-added substances such as food and pharmaceuticals, etc.



Model: SW11-2521
Active Membrane Area ft2(m2):12(1.1)
Permeate Flow Rate GPD (m3/d): 270(1.0)
Stabilized Rejection Rate (%): 99.5


Testing Position

  • Operating Pressure at 800 psi (5.52MPa)
  • Temperature at 25℃
  • Tested in 32000 mg/L NaCL solution
  • pH 8
  • Recovery rate at 4%


Operating Limit & Conditions

  • Maximum operating pressure: 1200psi8.28MPa)
  • Maximum feedwater flow: 6gpm1.4 m3/h
  • Maximum feedwater temperature: 45℃
  • Maximum feedwater flow SDI15: 5
  • Allowed pH range for feedwater in operation: 211
  • Allowed pH range for chemical cleaning: 113
  • Maximum concentration of free chlorine: 0.1ppm
  • Maximum pressure drop per element: 15psi0.1MPa
  • Membrane Specification

    Active Membrane Area ft² (m²): 12 (1.1)

    Permeate Flow Rate GPD (m³/d): 270 (1.0)

    Stabilized Rejection Rate %: 99.5

    Feed Spacer mil: 28

    Dimension: 21” (533.4mm) x 2.5” (61mm)

  • Test Condition

    Operating Pressure at 800 psi (5.52MPa)

    Temperature at 25oC

    Tested in 32000 mg/L NaCL solution

    pH 8

    Recovery rate at 4%

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