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CSM RE4021-BE High Productivity RO Element with Extended Area for Brackish Water, 4" x 21"
RE4021-BE
RE4021-BE
 

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Product Code: RE4021-BE
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Description Spec Sheet / Manual Technical Specifications
 

CSM RE4021-BE High Productivity RO Element with Extended Area for Brackish Water, 4" x 21"


Reverse osmosis membranes are used widely for brackish water desalination. CSM brackish water RO membrane is especially more effective when the feed water is within 10,000 ppm of concentration. Because of its high performance rate and chemical resistance, it can be used for a variety of purposes. It is used in producing drinking water, industrial water, pharmaceutical water, waste water treatment and concentration of food and/or medicine.


  • Each membrane element supplied with one brine seal, one interconnector (coupler) and four o-rings.
  • All RE4021 elements fit nominal 4.0 inch (101.6 mm) I.D. pressure vessels.

General Features:
  • Permeate flow rate: 930 GPD (3.5 m3/day)
  • Nominal salt rejection: 99.5%
  • Effective membrane area: 27 ft2 (2.5 m2)
*See RE4021-BE Spec Sheet for test conditions

General Specifications:

Permeate Flow Rate (GPD, m3/d)Salt Rejection (%)Diameter / Length (inch)Test Conditions
1,200 (4.5)99.54.0 / 2140" BW Standard

• 21" BW Standard test conditions: NaCl 2,000 mg/L, Pressure 150 psig, Temperature 25°C, pH 6.5-7.0 Recovery 8%

Operating Limits:

Max. Pressure Drop / Element15 psi (0.1 MPa)
Max. Pressure Drop / 240" Vessel60 psi (0.41 MPa)
Max. Operating Pressure600 psi (4.14 MPa)
Max. Feed Flow Rate13 gpm (4.09 m3/hr)
Min. Concentrate Flow Rate3 gpm (0.91 m3/hr)
Max. Operating Temperature113°F (45°C)
Operating pH Range2.0 - 11.0
CIP pH Range1.0 - 13.0
Max. Turbidity1.0 NTU
Max. SDI (15 min.)5.0
Max. Chlorine Concentration< 0.05 mg/L

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