Engineering Utilities

Industrial Chemical Dosing Calculators

Interactive engineering calculators designed for plant engineers, utility managers, and water treatment operators to determine exact metering pump stroke rates and chemical consumption.

1. Flow-Proportional Dosing 2. Cooling Tower Mass Balance 3. RO Antiscalant 4. Boiler Water 5. Biocide Shock

Module 01 Continuous Inline Feed

Continuous Flow-Proportional Dosing Calculator

Calculate daily active and commercial chemical requirements, plus metering pump flow rates for inline continuous chemical dosing into any water stream.

System Flow Rate (m³/hr)

Desired Active Dosage (ppm or mg/L)

Product Active Concentration (%)

Specific Gravity / Density (g/cm³)

Operating Hours per Day

Module 02 Cooling Systems

Cooling Tower Evaporation, Blowdown & Inhibitor Dosing

Calculate evaporation losses, blowdown requirements, makeup demand, and required corrosion/scale inhibitor dosing based on cooling range and Cycles of Concentration (CoC).

Recirculation Flow Rate (m³/hr)

Cooling Range / Temp Drop (ΔT in °C)

Cycles of Concentration (CoC)

Inhibitor Target Dosage in Makeup (ppm)

Chemical Active Fraction (%)

Chemical Specific Gravity (kg/L)

Module 03 Membrane Systems

Reverse Osmosis (RO) Antiscalant Dosing Calculator

Calculate neat antiscalant consumption and continuous chemical mass rate for RO membrane scaling protection.

RO Feed Water Flow Rate (m³/hr)

Antiscalant Recommended Dosage (ppm)

Module 04 Boilers & Steam

Boiler Feedwater Oxygen Scavenger & Scale Inhibitor Dosing

Determine feedwater demand, sulfite/DEHA oxygen scavenger feed, and phosphate/polymer scale inhibitor rates.

Boiler Steam Generation (Ton/hr)

Boiler Continuous Blowdown (%)

Dissolved Oxygen in Feedwater (ppm)

Safety Factor (typically 1.2 – 1.5)

Scale Inhibitor Target in Feed (ppm)

Polymer Product Concentration (%)

Module 05 Microbiological Control

Biocide Shock / Slug Dosing Calculator

Calculate one-time slug dose volume and mass for microbial and bio-slime knockdown in cooling towers or closed loops.

Total System Water Volume (m³ / 1,000 Liters)

Target Slug Concentration (ppm or mg/L)

Product Active Concentration (%)

Biocide Specific Gravity (g/cm³)

Important Engineering Disclaimer: These dosing calculators provide mathematical estimates based on ideal steady-state operational parameters. Actual chemical feed rates depend on real-time water quality fluctuations, water temperature, metallurgy, and microbial challenge. For site-specific chemical selection and water analysis interpretation, please contact the ZEEL PRODUCT technical team.

Industrial Chemical Dosing Calculators

Continuous Flow-Proportional Dosing Calculator

Cooling Tower Evaporation, Blowdown & Inhibitor Dosing

Reverse Osmosis (RO) Antiscalant Dosing Calculator

Boiler Feedwater Oxygen Scavenger & Scale Inhibitor Dosing

Biocide Shock / Slug Dosing Calculator

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