Calculated membrane chemistry for desalination and RO plants.
Product and dosage selection depends on feedwater analysis, system design, recovery target, membrane type, pretreatment performance, pH, temperature and operating history.
Analysis First
Water analysis before product recommendation.
TDS, SDS and certificates are shared upon request.
Desalination and reverse osmosis plants are sensitive systems where one chemical decision can affect scaling risk, membrane fouling, cleaning frequency, permeate quality, recovery target and operating cost. Product selection must therefore be based on the full membrane system, not only on feedwater TDS or a generic antiscalant category. For potable water, municipal desalination, bottled-water, food and beverage utility water or regulated export projects, selected PureGuard® RO antiscalants can be presented with NSF/ANSI/CAN 60 listing proof where the product and use scope match the official listing.
NSF/ANSI/CAN 60 listed PureGuard® RO antiscalants available.
PureGuard® 7104 and PureGuard® 7112 as listed RO antiscalants.
Use only official NSF logo/mark asset according to applicable brand-use rules. Do not redraw or modify the logo.
Selected phosphate-free RO antiscalant options may be evaluated where system conditions and water chemistry allow.
Green Chemistry options must still protect the membrane and be selected by RO-Watel / technical review.
Discharge-conscious selection may support customer or project expectations, subject to application review.
Engineering-grade RO projection and antiscalant selection platform used to support product and dosage recommendation.
Use for RO/membrane product selection and dosing logic. Do not present as a simple product matcher.
Data-based technical service support may help evaluate entered system information, water analysis and operating trends where approved.
Coagulant and filtration-support routes for turbidity, colloids and SDI-related membrane-fouling risk.
Selected PureGuard® RO antiscalants listed under NSF/ANSI/CAN 60 for applicable RO applications.
NSF/ANSI/CAN 60 | PureGuard® 7104 | PureGuard® 7112
Water systems in scope
| Zone | Role | Sensitivity |
|---|---|---|
| Raw water intake / feedwater | Seawater, brackish water, well water, surface water or industrial feedwater entering the treatment train. | Turbidity, suspended solids, organics, iron, manganese, algae, microbiological load and seasonal variation. |
| Pretreatment and filtration | Clarification, multimedia filtration, cartridge filtration, UF/MF or other pretreatment steps before RO. | SDI control, turbidity reduction, coagulant compatibility, polymer/carryover risk and filter performance. |
| RO / membrane trains | Main desalination or concentration control step for permeate production. | Carbonate, sulfate, silica, barium/strontium sulfate, iron/aluminum, organic fouling and biofouling risks. |
| Concentrate / brine side | High concentration stream where scaling risk becomes critical as recovery increases. | Recovery target, concentrate pH, ionic strength, silica, sulfate, carbonate and saturation limits. |
| CIP / membrane cleaning | Cleaning and recovery route when membranes are affected by inorganic, organic or biological fouling. | Correct cleaner selection, cleaning sequence, compatibility, contact time and post-cleaning performance review. |
| Permeate / utility interface | Permeate used for process, potable, boiler feed, cooling make-up or industrial production. | Application-specific documentation, downstream chemistry and local compliance requirements. |
Typical water-related problems
| Problem | Why It Matters | Response |
|---|---|---|
| Mineral scaling | Concentrate-side precipitation can reduce flux, increase differential pressure and shorten cleaning intervals. | PureGuard® 7-Series antiscalants; RO-Watel product/dosage selection. |
| Silica and sulfate risk | High recovery and high-TDS waters can increase silica, CaSO4, BaSO4 and SrSO4 risk. | Calculated antiscalant selection, recovery review and product-specific performance limits. |
| Turbidity / SDI risk | Poor pretreatment increases particulate fouling and membrane blockage. | BlancoWT® pretreatment coagulants and jar/bench review where needed. |
| Coagulant or polymer carryover | Incorrect pretreatment chemistry can damage membrane performance or increase fouling. | Pretreatment design review, product compatibility and filtration performance control. |
| Biofouling tendency | Microbiological growth can reduce flux and increase cleaning frequency. | Biofouling-risk support and hygiene-aware system review; no sterilization or universal kill claim. |
| Membrane fouling and cleaning need | Organic, inorganic and biological deposits require controlled cleaning chemistry and method. | PureGuard® 3-Series membrane cleaners and application guidance. |
| Wrong dosage selection | Overdosing or underdosing antiscalant can create performance and cost problems. | RO-Watel projection and Liberta technical review. |
System mapping
| System | Risk | Solution |
|---|---|---|
| RO pretreatment | Turbidity, SDI, colloidal load, iron/aluminum sensitivity and carryover risk. | BlancoWT® pretreatment coagulants, application review and filtration-performance control. |
| RO antiscalant program | Carbonate, sulfate, silica, barium/strontium sulfate and metal-related scaling. | PureGuard® 7-Series RO antiscalants, including selected NSF/ANSI/CAN 60 listed and phosphate-free options. |
| Green Chemistry route | Projects requiring phosphate-free or discharge-conscious selection. | Selected phosphate-free PureGuard® RO antiscalant options where water chemistry and system design allow. |
| Biofouling-risk support | Microbiological activity, biofilm tendency and organic fouling risk. | PureGuard® 1-Series biofouling-risk support where application scope and local regulations allow. |
| Membrane cleaning | Inorganic scale, organic fouling, particulate deposits and biological fouling residues. | PureGuard® 3-Series membrane cleaning and maintenance chemistry. |
| Digital product/dose selection | Wrong product, wrong dose, incomplete system evaluation. | RO-Watel projection and antiscalant selection logic. |
| Data-based service support | Trend review, system condition follow-up and field data consolidation. | Watel Analyses may support entered-data based review for approved RO/service applications. |
OUR APPROACH
From analysis to monitoring
Structured technical support at every stage of program selection and field review.
Analysis
Diagnosis
Treatment
Monitoring
Next step
Explore product families, request a document pack, or send water analysis for technical review.