If this calculation is right that 11.2487 lbs.would be a lot of weight that could be held to the end of the 1.71 I.D. PVC pipe, yielding 55 cubic inches or 30 1/2 fluid ounces.ġ atmosphere (29.92 inches mercury) = 14.695948775 pounds per square inchĤ.898 psi x 2.29658 sq. It was equipped with 24" of class 200 1 1/2 in. The Model 625 was tested using a vacuum gage and regularly achieved and held a -10 in/hg, that's more than 1/3 of an atmosphere. Pulling the handle can more than double the mechanical force of the incomming water when compared to siphoning and improves the potential for gold recovery from cracks and crevices.
With a single elongation stroke of the HG Power Plant, the M625 hand powered suction GOLD dredge is capable of producing enormous suction at the intake nozzle attributable to it's sealed chamber construction. Model 625 HDPBHD Hand Dredge with the Experimental Gravity Trap GOLD Concentrator
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