How to Calculate Drops per Litre for Antiscalant Chemical in RO System?

21/06/2025, 12:05

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To ensure the right quantity of antiscalant chemical is fed into your RO system, you need to dose it correctly. One simple way to check dosing is by calculating drops per litre using the dosing pump.


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Step-by-Step Calculation:

✅ 1. Know the Recommended Dosage:

Every antiscalant chemical comes with a recommended dosing rate. Usually, it is 2 to 5 ppm (parts per million) — meaning 2 to 5 ml of chemical per 1000 litres of feed water.


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✅ 2. Total Water Flow:

Determine the total flow of feed water in litres per hour (LPH). For example, if your RO plant processes 1000 LPH, you need to dose 2 to 5 ml per hour depending on water quality.


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✅ 3. Dosing Pump Stroke Setting:

Most dosing pumps deliver a fixed volume per stroke or per drop. For example:

1 ml = approx 20 drops (standard assumption).


So, if you need 5 ml/hour, the total drops per hour = 5 ml x 20 = 100 drops/hour.

This means your dosing pump should deliver 100 drops every hour, or about 1.66 drops per minute.


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✅ 4. Adjust the Pump:

Set your dosing pump accordingly to achieve this rate. Modern dosing pumps allow you to adjust flow rate in ml/hour or drops/min.


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✅ Important Tips:

✔️ Always check the antiscalant supplier’s dosing chart.
✔️ Adjust based on water TDS and scaling potential.
✔️ Over-dosing or under-dosing can harm the RO membrane.


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For accurate dosing guidance and quality Antiscalant Chemical, contact Candour Water Solution — trusted pan India supplier.

? https://www.candourrosystem.com/antiscalant-chemical-ro-system.php
? 8287000826, 9654800906