Top-up nozzle for packraft boston valve
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Small low-profile nozzle for a top-up tube that fits over certain boston valves for inflatable watercrafts.
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Outdoor Sports
- Licencja
- Creative Commons — Attribution
This design is aimed for water-borne users who require a way to top-up a low-pressure inflatable craft remotely without having to put their mouths directly to the boston valve.
More specifically, I made this for my Telkwa DIY packraft so I could top it up while paddling without having to weld a separate permanent top-up valve in the tubes.
Unfortunately not all valve manufacturers make their threads exactly the same, so while it is very close to 7/8-14 UNF, it is incompatible. Thread pitch is exactly the same but diameter is off by almost 2mm.
You will need flexible tubing. The nozzle is dimensioned for 3/8" ID - ½" OD tubes. At the other end, you can use a twist valve like this NRS model as an airtight mouthpiece.
You have two options for printing:
- separate knob and nozzle
- the knob can slide over, but once there is a tube on the nozzle, it's not possible
- print-in-place parts
- you will need supports under the nozzle baseplate, but be careful not to put any inside the tube
- you also need supports under the barbed nozzle tip.
The parts in the pictures are print-in-place. After removing supports, you'll need to apply some downward pressure to unlock them. I pushed on the butt end of the nozzle so I didn't risk damaging the tip.