![]() Venturi Nozzle12mm Hose Fixed by Downunder35m on SketchfabĪnd last but not least for those people who don't like hose clamps: Here is one directly for a standard 12mm garden hose: If you have a good pump on your fish tank it might be a nice addition to get a strong current and more air in your tank. The nozzle might still work if using outside the water but the full potential only comes under water. Please note that this design is meant to be used submerged! The barbed fitting is for a hose with an inner diameter of 10mm, like found for most cheap shower adapters for the bath tub. No support required but a wide brim is recommended so the air vent will stay on the build plate. ABS is prefered but PLA should work the same. For the printing I recommend a fine nozzle and 2 perimeters, 40% infill. Venturi Nozzle 10mm Hose by Downunder35m on Sketchfab I am not responsible for any damages you cause to yourself or others if you don't use the nozzle as intended! Here you can see it in action on a 1.25L soda bottle: Basically for everything that needs decent suction.ĭisclaimer: I only provide the files and assume you know what you do with the nozzle! I am not responsible if your printed nozzle fails due to poor print quality. Of course to make bubbles in your bath ) If you need a bit of vacuum, for example to degass resin, you can do this not without an expensive pump. After a few not so good ones I now have a little nozzle that is strong enough to deflate a soda bottle, don't have a vacuum gauge at hand but it really sucks enough to feel it on your finger when closing the air vent. I wanted something that not only sucks well (sorry for the bad joke!) but also provides a lot of pressure on the outlet so the bubbles are dispersed properly. ![]() There are quite a few 3D models available for Venturi systems but they are either meant for the use with compressed air or need far too much water. If you have no clue what that is check Wikipedia. No, I decided to make a little venturi nozzle! Take a hose from the compressor instead? ) ![]() My little niece complained about her bubble bath not having enough bubbles! So what can the good uncle do about it? Add an air pump and bubble stone? - Takes far too long. You can cut the friction loss numbers above in half for a 1/2" restrictor pipe nozzle.Update: : Added two models for the use on a compressor instead of using water. Most of the "tools" for calculating friction loss etc. I hope this helps, I have done the same as you in building my own jet's, just trying to help save some aggravation in the process. To get 80gpm through a 1/2" jet orifice would require 50psi on a well designed orifice and even more on a homemade. If you are not running a high pressure pump than slightly larger is even better. I hate to bring it up (Sorry GG), but the ratio of 1/4 the diameter is to your 2" inlet so a 1/2" jet orifice is better suited than 3/8. So the losses are significant as the length increases. If you factor a 1-1 motive fluid feed to suction and want to draw 80gpm through the nozzle then your going to need 80gpm through the jet.Ĩ0gpm through 4" of 3/8 diameter pipe calculated psi loss is 63psiĨ0gpm through 1/2" of 3/8 diameter pipe calculated psi loss is 7.8Ĩ0gpm through 1/4" of 3/8 diameter pipe calculated psi loss is 3.8 The losses of psi incurred from friction losses through the 4"long restriction are going to result in poorer performance. I recommend cutting back the restrictor to less than 1/2" long.
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