1/3/2024 0 Comments Homemade suction dredge nozzle![]() You can cut the friction loss numbers above in half for a 1/2" restrictor pipe nozzle. 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. 1-1/2 GOLD DREDGE NOZZLE WITH THREADS ON THE PRESSURE SIDE AND A HIGHBANKER NOZZLE. To get 80gpm through a 1/2" jet orifice would require 50psi on a well designed orifice and even more on a homemade. One thing to keep in mind if you use a keene ,proline nozzle or powerjet is that you need a keene or proline pump to run it any of the trash pumps or even the. 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 DISCHARGE HOSE: 2.5 inch OD heavy duty flat hose 150ft long (Additional hose lenghths up to 450ft (totalling 3 x 150ft hoses) can be added upon request. 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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