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PTFE sealing ring 250 ml SiN mounted is a replacement gasket manufactured from PTFE with a diameter of 85/76 mm for silicon nitride grinding bowls of the classic line with 250 ml volume. This mounted seal supports reliable closure of grinding vessels during sample preparation and particle-size reduction in laboratory ball mills. When fitted to silicon nitride bowls, it helps maintain process integrity by limiting escape of powders or liquids under milling conditions. The component is offered by manufacturer Fritsch as a direct spare part for classic-line systems and integrates with the corresponding bowl geometry without modification. Supplied as a single piece with a net weight of 0,01 kg, the ring is suited to routine maintenance schedules in materials-science, geological and analytical laboratories. PTFE construction provides chemical resistance compatible with a wide range of milling media and sample matrices commonly processed in planetary and similar mills. Technicians can therefore restore sealing performance quickly, preserving the hardness and wear advantages of silicon nitride bowls throughout extended grinding cycles while keeping the milling environment controlled and reproducible.
This article is part of Sieve accessories (lids, pans, rings), in Test sieves & mills.
Key features
- Pack size: 1 pc
- Material: PTFE
- Diameter: 85/76 mm
- Compatible with: Silicon nitride classic line grinding bowls 250 ml
- Type: Replacement sealing ring
- Technical Information Sheet:
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Questions about seal ring PTFE for grinding bowls 250 ml SiN
What is this article?
seal ring PTFE for grinding bowls 250 ml SiN is the article on this page. Luminix Health distributes Fritsch for laboratory use. It sits in Sieve accessories (lids, pans, rings), inside Test sieves & mills, in Instrumenten.
Sieve accessories are the lid, the pan and the intermediate rings that close a stack. The receiver pan is where the fines end. A lid from a different frame diameter does not seal the stack.
A test sieve sorts particles by whether they pass an opening. Wire mesh and perforated plate are two ways of making that opening, and the nominal size is not a suggestion. A sieve shaker repeats the motion so the result does not depend on how hard someone shook by hand. A mill or grinder makes the particles smaller before they are sieved. The certificate of the sieve, and the opening size, are what an audit asks for. Measurement practice around mass and dimension sits with the BIPM, EURAMET and BELAC.
Which category should I open next?
The category is Test sieves & mills. The sub-category is Sieve accessories (lids, pans, rings). The catalogue is Instrumenten.
Shelves beside this one are Test sieves (wire mesh), Test sieves (perforated plate), Mills, grinders & homogenisers and Sieve shakers.
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.
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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.