Product Information

Lewatit S 80 is a strongly acidic, gelular cation exchange resin of a standard bead size distribution based on a styrene -divinylbenzene copolymer. Its high total capacity, very good chemical and mechanical stability make it especially suitable for use in softening of industrial water.
Lewatit S 80 can be used in conjunction with all conventional ion exchange process. For other systems, there are special grades of this resin with a suitable bead size distribution, such as our Lewatit MonoPlus grades.

The special properties of this product can only be fully utilized if the technology and process used correspondence to the current state-of-the-art. Further advice in this matter can be obtained from Bayer Chemicals, Business Unit Ion Exchange Resins.

General Description

Lonic form as, as shipped Na+
Functional group sulfonic acid
Matrix crosslinked polystyrene
Structure gel type beads
Appearance brown, translucent

Physical and Chemical Properties

Bead size* > 90% mm 0.315 ~ 1.25
Effective size mm 0.47 ± 0.06
Uniformity coefficient* Max Max. 1.7
Bulk weight (± 5%) g/I 850
Density approx. g/ml 01/01/28
Water retention % 42 – 48
Total capacity* min. eq./I 02/01/09
Volume change Na+ -> H+ max. % 10
Stability 0 – 14
Storability min. years 2
Storability °C -10 – 40

*These data are specification values and are subject to continuous monitoring.

Recommended Operating Conditions*

Operating temperature max. °C 120
Operating pH range 0 – 14
Bed depth Min. mm 800
Specific pressure loss (15°C) approx. Kpa* h/m2 1.5
Max pressure loss exhaustion Kpa 150
Linear velocity*** backwash (20°C) max. m/h 40
Linear velocity (20°C, per m/h) approx. m/h 14 – 18
Bed expansion as% of resin volume approx. % 4
Freeboard % 80- 100
Regenerant level NaCI
Counter-current regeneration concentration approx. g/I 90
(or WS-System) regeneration approx. % 8 – 10
Linear velocity rinsing approx. m/h 5
Linear velocity approx. m/h 5
Rinse water requirement approx. BV 5
Co-current regeneration level approx. g/I 200
concentration approx. % 8 – 10
Linear velocity regeneration approx. m/h 5
Linear velocity rinsing approx. m/h 5
Rinse water requirement approx. BV 6

*The recommend operating conditions refer to the use of the product under normal operating conditions. It is based on tests in pilot plants and data obtained from industrial applications. However, additional data are needed to calculate the resin volumes required for ion exchange units. These are to be found in our Technical Information Sheets.
Safety precautions
Strong oxidants, e.g. nitric acid, can cause violent reactions if they come into contact with ion exchange resins


The safety data sheet must be observed. It contains additional data on product description, transport, storage, handling, safety and ecology.


A proprietary technical recycling process for used ion exchanger is unknown to us. In the European Community the following possibilities for disposal can be utilized.
Resins used for water treatment and in the sugar industry can be disposed under code number 190 905. Our preference is to recommend disposal in an industrial incinerator.
Ion exchange resins which contain impurities after use in industrial processes, e.g. electro­plating, chemicals treatment dc., can be disposed under code number 190 806. A certificate of disposal is required. Bayer Chemicals Ion Exchange Resins D-51368 Leverkusen. Lewatit® is a registered trademark of Bayer AG, Leverkusen.


This information and our technical advicc – whether verbal, in writing or by way of tests – are given in good faith but without warranty, and this also applies where proprietary rights of third parties are involved. Our advice does not free you from the obligation to check its validity and to tes our products as to their suitability for the intended processes and uses. The application, use and processes of our products and the products manufactured by you on the basis of our technical advice are beyond our control and, therefore, entirely you own responsibility. 0ur product are sold in accordance with our general conditions of sale and delivery.



Part No. Description Cu. Ft./Bag Wt./Cu. Ft.* Bags/Pallet Weight/Pallet Pallet Dimensions

A8021-01 Calcite .55 (50 lbs.) 90 lbs. 50 2550 lbs. 48” x 36” x 40”

* Weight per cubic foot is approximate.