Description
20 mm Butyl/PTFE septum disc is a formed sealing disc for laboratory vials and related analytical closures. The construction pairs a butyl elastomer body with a PTFE facing, combining elastic resealing behaviour with a chemically resistant contact surface. Specified hardness is 50° Shore A and disc thickness is 3,0 mm, supporting controlled needle penetration and reliable reseal after sampling in routine GC, HPLC and general sample-handling workflows.
This article is part of Vial caps & septa, in Vials, caps & septa.
Each unit is supplied as 10 packs of 100 pieces, giving 1000 discs per order for high-throughput preparation and stock replenishment. The 20 mm formed geometry is intended for consistent seating under matching crimp or screw caps used on standard laboratory vials. Grey colour coding aids quick visual identification at the bench. This product from manufacturer Altmann Analytik is described as an alternative to VWR article 548-0569, helping laboratories source a compatible butyl/PTFE disc format without changing established 20 mm closure practices. Typical applications include solvent-containing samples, headspace work and everyday vial sealing where a PTFE barrier over butyl is preferred for chemical compatibility and clean sample contact.
Key features
- Pack size: 10 × 100 pcs (1000 pc(s))
- Diameter: 20 mm
- Material: Butyl/PTFE
- Colour: Grey
- Hardness: 50° Shore A
- Thickness: 3,0 mm
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Questions about 20mm Moulded Septa Butyl/PTFE, grey, 50° shore A, 3.0mm, 10 x 100 pc
What is this article?
20mm Moulded Septa Butyl/PTFE, grey, 50° shore A, 3.0mm, 10 x 100 pc is the article on this page. Luminix Health distributes Altmann Analytik for laboratory use. It sits in Vial caps & septa, inside Vials, caps & septa, in Chromatography equipment.
A vial cap and a septum have to match the vial neck: crimp, screw or snap, and the diameter. The septum material, PTFE/silicone or rubber, decides chemical resistance and how many times a needle can pierce it. A septum that sheds into the solvent becomes ghost peaks.
An autosampler vial is the small closed bottle a chromatograph picks up. The neck is crimp, screw or snap, and the cap and the septum have to be that neck. The septum is the part the needle pierces. A soft septum reseals. A septum that is wrong for the solvent swells or sheds particles into the sample. Inserts reduce the volume when the sample is scarce. The separation they feed is described with IUPAC names and PubChem data.
Which category should I open next?
The category is Vials, caps & septa. The sub-category is Vial caps & septa. The catalogue is Chromatography equipment.
Shelves beside this one are Chromatography accessories, Autosampler vials, Crimpers & decappers and Vial inserts.
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. Delivery across Europe, two to five days when in stock. 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.
