Description
PTFE bellows NS 45/40 is a flexible ground-joint connector for larger laboratory glassware setups that require chemical inertness and limited mechanical play. Fabricated completely from PTFE, it presents a core NS 45/40 and a matching sleeve NS 45/40 for direct engagement with standard conical joints of this size. The bellows geometry compensates for minor misalignment and expansion differences, protecting glass apparatus under thermal cycling or vacuum. Supplied as a single unit with a net weight of 0,168 kg, the component from manufacturer Witeg is suited to transition pieces and couplings where rigid adapters would transmit stress. It finds application connecting large flasks, reactors, condensers and columns equipped with NS 45/40 joints in preparative chemistry, distillation and process-scale laboratory work. PTFE’s broad chemical resistance supports contact with diverse solvents and reagents while minimising extractables. Reusable and compact relative to multi-part assemblies, this bellows provides a durable flexible link at the NS 45/40 interface for demanding laboratory environments.
This article is part of Distillation heads, adapters & columns, in Distillation & extraction glassware.
Key features
- Pack size: 1 pc(s)
- Material: PTFE
- Joint size: NS 45/40
- Core: NS 45/40
- Sleeve: NS 45/40
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Distillation & extraction glassware
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Distillation heads, adapters & columns
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Questions about Bellow ST 45/40 PTFE
What is this article?
Bellow ST 45/40 PTFE is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Distillation heads, adapters & columns, inside Distillation & extraction glassware, in Labware.
A still head, an adapter or a column is the glass between the boiling flask and the condenser. A Vigreux or packed column gives the vapour a surface so a closer-boiling mixture can separate. The joint sizes at both ends have to match the flask and the condenser.
Distillation separates liquids by boiling point. A condenser turns the vapour back into liquid: Liebig, coil and cold-finger shapes differ in how much cooling surface they offer. A still head and a column sit between the flask and the condenser. A Soxhlet extractor washes a solid again and again with the same solvent. Ground joints have a standard size, and the joint, not the flask, is what has to match. The pieces are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Distillation & extraction glassware. The sub-category is Distillation heads, adapters & columns. The catalogue is Labware.
Shelves beside this one are Condensers, Ground-joint glassware (other) and Soxhlet & extraction apparatus.
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.