The cheapest cationic PAM per kilogram may not produce the cheapest dewatering result. Chemical demand, useful capture and cake water all affect the comparison. Use a clearly defined mass and cost basis so a purchase decision does not hide poor capture behind an attractive cake-solids reading.
Start with a consistent chemical-cost basis
For product dose in kilograms per dry ton, multiply the verified dose by the delivered product price per kilogram. If the operating result uses active dose, convert it with confirmed product data before multiplying by a total-product price. Keep preparation losses or other operating costs separate unless measured. The dose calculation guide supports the normalization; do not invent a standard active fraction to force two offers into the same equation.
Normalize wet cake to captured dry solids
At a stated cake dry-solids fraction, wet cake mass equals captured dry-solids mass divided by that fraction. For illustration only, one tonne of captured dry solids at 20% cake solids corresponds to five tonnes of wet cake; at 25% it corresponds to four. Those are arithmetic examples, not promised outcomes. Compare capture at the same time, because a drier cake can appear cheaper while more solids return in the separated liquid.
Use the actual transport and disposal basis
Confirm whether charges are based on wet mass, vehicle load, volume or another contractual basis. Include constraints that change useful loads or handling. Do not multiply wet-cake mass by an invented universal disposal price. Account for relevant throughput, cleaning and return-liquor consequences when they materially differ. A small chemical saving may lose its value if the machine result creates a larger operating burden elsewhere in the plant.
Compare representative trial results before ordering
Use paired feed conditions, meaningful machine settings and verified dose. Keep the result range visible rather than price one unusually favourable shift as permanent performance. The production approval guide helps connect the calculation with application evidence. Request a quotation for the tested candidate and delivery scope; price and performance should refer to the same product identity.
Evidence needed before purchase
Record the actual observation or document reference against each item. If a condition was not tested, keep it visible as an approval limitation. Purchasing, operations and receiving should use the same candidate identifier so a favourable result is not transferred to a different product or unreviewed delivery.
| Decision | Evidence | Release condition |
|---|---|---|
| Chemical basis | Product or active dose and compatible delivered price | Units and conversion are explicit |
| Solids balance | Captured dry solids and cake fraction | Drier cake does not conceal lower capture |
| Commercial cost | Actual transport and disposal charging basis | Illustrative mass arithmetic is not a price guarantee |
Information to send with the quotation request
Send verified dose basis, delivered quotation scope, capture, cake dry-solids fraction and machine throughput from the same comparison. State the real haulage or disposal charging method if it is part of the decision. Identify which values are measured and which remain planning assumptions.
Include the required quantity, packaging method and destination with the technical evidence. Use the cationic PAM trial and RFQ route for a focused sample review, then confirm documents, packaging and supply scope for the approved product. Gongyi Xinqi Polymer Co., Ltd. can review the application and quotation requirements. Grade suitability, delivery availability and commercial terms need confirmation; no universal dose or guaranteed treatment outcome should be inferred from an application name.
Sample pathway
Send the feed condition and machine target.
A focused sample set starts with representative sludge, active dose, equipment and acceptance data.