Power jet gold dredge12/27/2023 While it may sound easy, suction dredging is much more difficult than vacuuming coins out of your couch cushions (or gold flakes out of your carpeting). In a way, the process is like a combination of the best parts of gold panning and gold dredging. These materials pass into a floating sluice, which filters and recovers the gold. It sucks up rocks, gravel, silt, and anything else at the bottom of a streambed using a gas-powered pump and suction hose. Without getting into an explanation of friction loss of your ten foot, one inch diameter pressure hose, you will require 33.5 psi at the pump to provide the 30 psi at the eductor.For the amateur prospector who wants to take their hobby to the next level but doesn’t want to work in a mine, upgrading to suction dredge can be a great way to find more gold while still enjoying the great outdoors.Ī suction dredge essentially works like a heavy-duty underwater vacuum cleaner. Refer to a conversion chart to find conversion of decimal inched to "regular" inches which is fractionally larger than 1/2".Īt 30 psi the 1/2' eductor will require 41 g.p.m. 264 IMPORTANT: this is the radius of the eductor size - NOT the bore size! Now for the tricky part: convert backwards and finally come up with a bore diameter.Įductor size is. inchesĮxample: 2 inch jet Ģ inch jet = 3.14 x (1" (radius of jet) Squared)ģ.14 sq inches x 7% (.07) =.
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