Glass tube
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Glass tubes are mainly cylindrical hollow-wares. Their special shape combined with the huge variety of glass types, allows the use of glass tubing in many applications. For example, laboratory glasswa
Danner drawing-muffle in the VEB glass factory Weißwasser
Stopcock
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A stopcock is a form of valve used to control the flow of a liquid or gas. The term is not precise and is applied to many different types of valve. The only consistent attribute is that the valve is d
Glass tube
…measure using commercially available glass tubes by specialist glassblowers. For example, a Schlenk line is made of two large glass tubes, connected by stopcocks and smaller glass tubes, which are further connected to plastic hoses. Compared to other materials like plastics the importance of cylindrical half-finished…
A single hole hollow glass stopcock held in place by vacuum
A straight bore plastic stopcock without the female joint. Note its washer and nut system for attaching to its female joint.
A T-bore glass stopcock in a three-way assembly. Two of the outlets end in plain hose adapters while the third ends in a male 14/20 ground glass joint. This stopcock is attached with an easily removed metal spring.
A double oblique bore glass three-way stopcock