This is designed to join two pieces of vacuum cannon pipe together when they are used for high pressure fluids. It is a very close fit to the cannon and can be used in many ways if you are of the DIY persuasion or have a friendly technology department.
The collar fits very tightly, and will make an vacuum proof seal itslef if you put one layer of tape around the cannon. There is a ridge in the middle of the collar that is about 0.5mm bigger than a table tennis ball. I tried filing out this ridge in a couple of the ones in stock (not that the ball would realise that difference at the pressures in the cannon)- but then realised the best use is to cut the collar in to slices.
- Quick reloading – cut the collar in to slices and have the ability to quickly retape the cannon. Make four slices and have a pair being retaped whilst a pair is used.
- Buy two and use a piece of tape over the ends of the cannon to get a vacuum tight seal. (That tape does degrade over time – but we also found that you sometimes get a vacuum tight seal with them on the bare tube.
- Support for flanges. If you have made flanges (the gold standard) then this can strengthen the bond beween flange and cannon.
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