TS EN 17877

TS EN 17877 is a terminology standard for dynamic mixers and agitators, together with the hydraulic characterizations used to describe their behaviour. It establishes a common technical language for mixing and agitation projects so that manufacturers, users, integrators and inspection bodies can refer to the same concepts in a consistent way.

A shared vocabulary for dynamic mixing systems

In general technical terms, a dynamic mixer or agitator creates motion in the fluid by means of a moving or rotating element. Hydraulic characterization refers to the descriptors used to explain how that equipment drives circulation, generates turbulence and interacts with the dominant liquid phase. These concepts are important when comparing different designs, because similar process goals can be achieved with very different mechanical arrangements.

What the document includes and excludes

• The standard applies to mixing and agitation systems with at least one dominant liquid phase.
• Static mixers are excluded.
• Kneaders, submersible mixers covered by ISO 21630, aerators and pumps are excluded.
• Annex A lists the definitions in alphabetical order.
• The document focuses on terms and hydraulic characterizations rather than prescribing a design method for all mixer types.

From a process-engineering perspective, mixers and agitators are widely used in tanks, reactors and vessels to improve mass and heat transfer, maintain suspension and promote uniformity. The value of this standard is that it clarifies the language used to describe these systems and their hydraulic behaviour, helping different stakeholders discuss performance with less ambiguity.