ALDEX C-800 Series Resins

C-800 LT UPS Water Softening Resin Sodium Form

Aldex C-800 LT UPS is a high capacity, high quality, gel-type cation resin capable of meeting the most exacting requirements of household, farm, commercial, institutional and industrial water softeners. It is supplied in the sodium form as gold colored translucent beads in 1 cubic foot bags and larger bulk packages.

Download Aldex C-800 LT UPS Technical Bulletin (PDF)

Physical Chemical Properties

Resin Composition:Sulfonated styrene / divinylbenzene copolymer
Ionic Form as Shipped: Sodium (Na+)
Physical Form:Golden color,
translucent beads
Moisture Content: 45 to 49.9%
Total Capacity:1.9 meq/ml minimum
41 kilograins as CaCO3 per cubic foot
Odor and Taste: None
Specific Gravity:1.28
Net Weight (as shipped): 51 lbs per cubic foot
Particle Size:20 to 40 mesh - Less than 0.5% through 50 mesh

Recommended Operating Conditions

Influent pH:No restrictions
Maximum Temperature:250 °F
Bed Depth:Minimum 24”
Normal 36”
Service Flow Rate:1 to 5 US GPM per cubic foot
Backwash Flow Rate:See Fig. 2
Regenerant:Sodium Chloride (NaCl) or Potassium Chloride (KCl)
Regenerant Strength:5 to 15%, usually 10%
Regenerant Flow Rate:0.3 to 1.0 US GPM per cubic foot of resin
Regenerant Contact Time:15 to 60 minutes
Regenerant Dosage Level: 2 to 15 lb per cubic foot
Slow Rinse (Displacement) Flow Rate:0.3 to 1.0 US GPM per cubic foot of resin
Slow Rinse Volume:20 USG per cubic foot resin
Fast Rinse Rate:1.0 to 5.0 US GPM per cubic foot resin
Fast Rinse Volume:30 USG per cubic foot resin

C-800 LT UPS Features

Very low color, taste or odor

Aldex C-800 LT UPS meets the requirements for paragraph 173.25 of the Food Additive Regulation of the U.S. Food and Drug Administration.

High Capacity

30,000 grains of softening capacity when regenerated with 15 lbs of NaCl per cubic foot and 20,000 grains with 6 lbs of NaCl per cubic foot ensuring high efficiency and low operating costs.

Long Life

Strong and durable beads insure long service life.


Aldex Chemical has over 34 years of field usage by thousands of customers demonstrate the reliability of Aldex ion exchange resins, zeolites and other water treatment media.

Safety Information

A material safety data sheet is available for Aldex C-800 LT UPS. Copies can be obtained from Aldex Chemical Co., LTD. Aldex C-800 LT UPS is not a hazardous product and is not WHMIS controlled.

Caution: Acidic and basic regenerant solutions are corrosive and should be handled in a manner that will prevent eye and skin contact. Before using strong oxidizing agents in contact with ion exchange resin, consult sources knowledgeable in the handling of these materials.


C-800 LT UPS Operating Suggestions


Aldex C-800 LT UPS will remove most of the dissolved iron, can filter much of the suspended iron and may or may not remove organically bound iron from water. When softeners are used to remove iron from the water, periodic cleaning of the bed mechanically or with a chemical iron cleaner may be necessary.


All cation exchange resins are affected by chlorine and suffer degradation and swelling. Is its recommended that the chlorine in the water be maintained below 1.0 ppm when using Aldex C-800 LT UPS.

Fig. 1 Exchange capacity vs. regeneration level Sodium form C-800 LT UPS Cation Resin

Backwash Characteristics

Aldex C-800 LT UPS should be backwashed for at least 10 minutes after each service cycle in a conventionally down flow regenerated softener. To reclassify the beads and remove suspended solids from the top of the bed, the resin bed should be expanded at least 50% according to Fig. 2.

In the case of non-conventional or upflow regenerated softeners, it may not be necessary to follow the above procedure since the backwash and brine injection are incorporated in the same step.

Fig. 2 Bed expansion vs. backwash flow rate for various water temperatures

These suggestions and data are based on information we believe to be reliable. They are offered in good faith. However, we do not make any guarantee or warranty. We caution against using these products in an unsafe manner or in violation of any patents. Further, we assume no liability for the consequences of such actions.