Industry’s Filtration Partner
The C-Series family, a triacetate/diacetate blend, has a higher flux and better mechanical stability than standard cellulose acetate. C-Series elements offer a lower per element cost and increased chlorine resistance compared to thin-film elements.

CK Nanofiltration Elements are used for water softening, color removal, and reduction of THM potential when chlorine is required.
Unit of Measure

Element Specification


N/A C-series, Cellulose Acetate

Flow Average

N/A 600 gpd2.3 m³/day

Salt Rejection Average (MgSO4)

N/A 97.0 %

Salt Rejection Minimum (MgSO4)

N/A 94.0 %


N/A Average salt rejection after 24 hours operation. Individual flow rate may vary +25%/-15%.
Testing conditions: 2,000 ppm MgSO4 solution at 225 psig (1,551 kPa) operating pressure, 77ºF, pH 6.5 and 15% recovery.

Active Area

N/A 27 ft²2.5 m²

Outer Wrap

N/A Fiberglass

Part Number

N/A 1231009

Dimensions and Weight

Dimension A (Length)

N/A 40.0 in101.6 cm
Dimension B1 N/A 0.75 inOD: 1.90 cm

Dimension C (Outside Diameter)

N/A 2.4 in6.1 cm

Boxed Weight

N/A 5 lb2.3 kg

Operating and CIP parameters

Typical Operating Pressure

N/A 60 - 200 psig414 - 1379 kPa

Typical Operating Flux

N/A 10 - 18 GFD17 - 30 LMH

Maximum Pressure

N/A 450 psig3103 kPa

Maximum Operating Temperature

N/A 86 ºF30 ºC

Maximum Cleaning Temperature

N/A 86 ºF30 ºC

Operating Range Recommended pH

N/A 5.0 - 6.5

Cleaning Range Recommended pH

N/A 3.0 - 8.0

Recommended Pressure Drop Over an Element

N/A 12 psig83 kPa

Recommended Pressure Drop Per Housing

N/A 50 psig345 kPa

Chlorine Tolerance

N/A 1 ppm Maximum Continuous
30 ppm for 30 min. During Sanitization


N/A NTU < 1 SDI < 5


N/A These elements ship dry.
Trademark of General Electric Company; may be registered in one or more countries.

  • 1 Internal diameter unless specified OD (outside diameter).