Replacement decision in brief
For a crystal-bearing sugar magma duty, compare measurable crystal condition before and after the complete transfer path. A vessel has no rotating pumping element, but inlet valves, restrictions, transitions and piping still affect the product. Confirm that the actual suspension falls within the proposed configuration and agree a representative trial before choosing a rotary lobe pump alternative.
Describe the suspension
Sugar magma contains crystals and a liquid phase. Selection needs crystal fraction, size distribution, temperature, liquid properties and any settling tendency. Explain the process origin and destination because the term magma can be used differently between factories. A photograph is useful for communication but does not replace representative sample data.
Look beyond the vessel
The product passes through inlet valves, outlet valves, bends and transitions. Restricted passages or abrupt changes can affect crystals even when the vessel contains no rotating pump element. Review bore sizes, valve internals and the complete piping route. Coating hardness alone does not prove suitable crystal handling or prevent product accumulation in a valve cavity.
Measure quality on a consistent basis
Agree a sampling method and compare crystal-size distribution before and after representative transfers. Avoid interpreting differences caused by sampling, temperature change or holding time as pump damage. Record both throughput and quality results. A successful water test confirms certain mechanical functions, but cannot demonstrate the behavior of a crystal-bearing suspension.
Set the application boundary
Do not automatically extend an accepted magma duty to high-Brix massecuite. The latter may have much greater resistance to flow and different filling behavior. SINOSEN does not treat high-Brix massecuite as a standard recommended application in the supplied brief. A proposed exception requires its own product review and trial. State the actual suspension rather than using a broad sugar-industry label.
General engineering guidance. Numerical examples are illustrative; project specifications and acceptance criteria are agreed for the actual duty.