Description
TR 21 turbine stirrer (V4A) is a stainless-steel overhead stirring impeller designed for larger-volume laboratory mixing applications. The jagged geometry of the blade makes the TR 21 especially effective for generating emulsions and for gassing or foaming liquids. It is optimised for vessels with an ideal diameter of 143–250 mm, a bottom clearance of 25–50 mm, a filling height of 143–250 mm and a working volume ranging from 2.300 to 12,300 ml. Measuring 400 mm in total length with an 8 mm diameter shaft, the stirrer is manufactured entirely from corrosion-resistant V4A stainless steel. This robust configuration from manufacturer Heidolph supports consistent high-shear mixing in mid- to large-scale batches while remaining compatible with conventional laboratory overhead stirrers. Delivered as a single unit, the TR 21 turbine stirrer offers dependable performance for emulsion production and aeration tasks across a wide range of vessel sizes.
This article is part of Stirring shafts, propellers & impellers, in Stirring, shaking & mixing.
Key features
- Pack size: 1 pc
- Product type: TR 21
- Material: V4A stainless steel
- Overall length: 400 mm
- Shaft diameter: 8 mm
- EAN: 4255661402649
- Technical Information Sheet:
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Questions about TR 21 Radial-Flow Impeller (V4A)
What is this article?
TR 21 Radial-Flow Impeller (V4A) is the article on this page. Luminix Health distributes Heidolph for laboratory use. It sits in Stirring shafts, propellers & impellers, inside Stirring, shaking & mixing, in Lab instruments.
A shaft, a propeller or an impeller is the wetted end of an overhead stirrer. The diameter and the pitch decide whether the liquid turns over. The material, stainless steel or PTFE, decides what the liquid may be. The chuck size has to match the stirrer.
Stirring keeps a mixture uniform or helps a solid dissolve. A magnetic stirrer spins a bar inside a closed vessel. An overhead stirrer drives a shaft when the liquid is viscous or the volume is large. A vortex mixer agitates a tube. A shaker moves a whole rack or a plate. The shape of the impeller and the speed decide whether the liquid turns over or merely spins. The vessels being stirred are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stirring, shaking & mixing. The sub-category is Stirring shafts, propellers & impellers. The catalogue is Lab instruments.
Shelves beside this one are Magnetic stirring bars, Magnetic stirrers, Stirring & mixing accessories, Homogenisers & dispersers, Shakers, rockers & rotators, Overhead stirrers and Vortex mixers.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.