Can I Use a Volumetric Doser for Both Powder and Liquid Additives

Many production managers ask whether a single Volumetric Doser can handle two completely different material states: dry powders and viscous liquids. The short answer is yes—but only if the machine is specifically designed with interchangeable feeding mechanisms. Sinburller offers modular Volumetric Doser systems that accommodate both powder augers and liquid piston pumps, allowing one control platform to serve dual purposes.

Material Compatibility Overview

How a Single Volumetric Doser Achieves Dual Use

The key lies in exchangeable dosing heads. Sinburller Volumetric Doser allows operators to swap the powder screw assembly for a liquid piston block in under ten minutes. For powders, volume is controlled by screw rotation speed and pitch. For liquids, volume is set by piston stroke length and cylinder diameter.

Important Limitations

• Do not run liquids through a powder screw – leakage will damage the drive.

• Clean the chamber thoroughly before switching material types.

• Use food-grade seals when dosing liquid additives for edible products.

Volumetric Doser FAQ – Common Questions

Q1: Can I dose high-viscosity paste using the same Volumetric Doser used for fine powder?

A1: Yes, but you must change the feeding head to a positive displacement piston unit. Standard powder augers cannot draw viscous paste into the screw flights. Sinburller offers a heavy-duty piston Volumetric Doser for materials up to 50,000 cP. The piston creates suction to pull thick fluids, while the powder version relies on gravity and rotation. Always verify the viscosity range with the manufacturer before purchasing.

Q2: How do I clean a Volumetric Doser when switching between powder and liquid additives?

A2: Complete cleaning involves three steps. First, run a neutral material through the Volumetric Doser to push out residues. Second, disassemble the dosing head and wash all contact parts with compatible solvent. Third, air-dry thoroughly to prevent powder clumping from residual moisture. Sinburller units feature quick-release clamps that reduce cleaning time by sixty percent compared to bolted designs.

Q3: Will accuracy drop if I use the same Volumetric Doser for both material types every day?

A3: Accuracy remains within plus or minus two percent provided you calibrate after each head swap. The calibration method differs: for powder, run ten cycles and weigh the total output. For liquid, measure the volume dispensed using a graduated cylinder. Sinburller recommends storing separate calibration profiles in the control panel. Frequent switching does not degrade mechanical accuracy, but seal wear on the liquid side should be inspected weekly.

Best Practices for Dual-Use Operation

• Always store powder and liquid heads separately to avoid cross-contamination.

• Mark calibration data directly on each dosing head.

• Run a test cycle of five shots before starting full production.

Need the Right Volumetric Doser for Mixed Additives?

Contact us today. Sinburller engineers will recommend the exact Volumetric Doser configuration for your powder and liquid needs, including free material testing and a customized changeover protocol.