precision-chemical-dosing-pump
PRECISION · ACCURACY · CHEMICAL SAVINGS
Chemical dosing pump accuracy is critical for water treatment systems, especially at low flow. The DOSECO SM‑Series chemical dosing pump uses stepper‑motor technology to maintain true precision from 1% to 100% of design flow, eliminating overdosing, chemical waste, and compliance risks.
The inaccuracy that water treatment professionals reluctantly accept, in a conventional diaphragm dosing pump driven by a solenoid electromagnet, means the dose is physically determined by a single solenoid slug.
At low flow rates, the pump can only choose between dosing a full stroke or nothing. The average flow appears correct, but the actual dosing becomes an on-off pattern — not smooth, continuous metering.
Solenoid pumps set at below 15% of design flow result in the pump becoming inaccurate, no longer a metering pump but a hazardous injection device.
We know you’ve been told to just “work around it” or to resize your dosing pump so the minimum flow stays above 15% turndown ratio. Alternatively, install a timer so the pump does not slug-dose as often, or simply accept the dosing system’s inaccuracy.
These are industry workarounds to a limitation that should not exist. As a water treatment professional, you’re aware of compliance requirements, chemical costs, and system risks.
You shouldn’t have to design around your dosing pump’s weakness. Your dosing pump should meet your process demands at all points across the 1-100% flow rate range.
The DOSECO SM-Series stepper-motor dosing pump produces the low-flow accuracy problem at its source.
Because a stepper motor divides rotation into measurable steps, the diaphragm speed can scale precisely, from 1% to 100% of full capacity.
Full-stroke operation ensures reliable priming and continuous dosing — even at extremely low flow rates.
This means a single pump capable of producing up to 6 liters per hour at 5 bar can also dose just 60 ml per hour at 5 bar. The same model will also accurately inject up to 8 liters per hour at a pressure of 1 bar.
One pump for multiple duty applications. The ideal dosing pump for the water treatment professional at an extremely affordable price.
If your process needs to run at 8% of full pump model design flow, solenoid overdosing can significantly increase chemical usage.
Continual manual recalibration. Overdosing and underdosing. Compliance uncertainty.
Inconsistant chemical usage.
Set the dose rate once. Accurate scaling over the entire flow scale. Reliable compliance.
Consistant chemical useage.
Less intervention.
Reliable dose rate
Reduced compliance risk
Predictable chemical usage
With a DOSECO Digital stepper-motor dosing pump, you gain full-flow accuracy, predictable chemical use,
and reliable compliance .