Description
Clamping collars, aluminium, DN 20/25, are laboratory accessory components intended for secure mechanical fastening on compatible equipment connections in the DN 20/25 nominal diameter range. Made of aluminium, they serve as fittings within vacuum and laboratory apparatus assemblies where this size class is specified. Supplied as 1 piece from manufacturer WELCH, the collars function as accessories or spare parts for laboratory devices that use aluminium clamping interfaces. They support stable joint retention on matching DN 20/25 connections during setup, operation and maintenance of laboratory systems. Positioned in the accessories and spare-parts category for laboratory equipment, these collars help keep compatible vacuum lines and instrument fittings correctly assembled. The aluminium construction and DN 20/25 designation align with common laboratory connection conventions, making the part suitable for replacement or complementary use wherever this collar type is required on WELCH-compatible or similarly dimensioned laboratory hardware.
This article is part of Clamps & bossheads, in Stands, clamps & racks.
Key features
- Pack size: 1 pc(s)
- Product type: Clamping collars
- Material: Aluminium
- Nominal size: DN 20/25
- Use: Fastening / clamping connection
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Questions about Clamping Collars, Aluminium, DN 20/25
What is this article?
Clamping Collars, Aluminium, DN 20/25 is the article on this page. Luminix Health distributes WELCH for laboratory use. It sits in Clamps & bossheads, inside Stands, clamps & racks, in Labware.
A bosshead grips the rod. A clamp grips the flask or the condenser, usually through two jaws with cork or vinyl faces. Three-finger and two-finger clamps hold different shapes. The jaw opening is the specification.
A stand, a clamp and a rack hold something still so the hands can do the work. A bosshead locks a clamp to a rod. A test-tube rack keeps tubes upright and in an order the operator can read back. The failure is almost always mechanical: the clamp slips, or the rack does not match the tube diameter. The glass they support is indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stands, clamps & racks. The sub-category is Clamps & bossheads. The catalogue is Labware.
Shelves beside this one are Test tube racks, Stands, rods & bases and Stand & rack accessories.
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.