Description
Silicone seal GL 25 with 22 × 8 mm dimensions and vulcanised PTFE collar is a laboratory sealing element for GL-threaded connections. The seal has an outer diameter of 22 mm and an inner diameter of 8 mm, and is intended for tubing in the 7,5–9,0 mm range. A flexible silicone body is combined with a vulcanised PTFE collar that improves chemical resistance and sliding behaviour at the contact surface. This construction supports reliable, reusable closures on GL 25 bottle and vessel necks used in analytical, preparative and general laboratory work. Supplied as a pack of 10 pieces from manufacturer Witeg, each seal has a net weight of 0,003 kg. The silicone–PTFE combination offers elasticity for repeated assembly while the PTFE surface limits sticking and chemical attack. Suitable for septa and sealing duties where a defined tube fit and GL 25 compatibility are required, these components help maintain leak-resistant joints in chemistry and life-science setups without adding unnecessary bulk to the connection.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 10 pc(s)
- Material: Silicone
- Thread size: GL 25
- Outer diameter: 22 mm
- Inner diameter: 8 mm
- Tube diameter range: 7,5–9,0 mm
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Questions about Gaskets GL 25
What is this article?
Gaskets GL 25 is the article on this page. Luminix Health distributes Witeg 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. 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.