![]() 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 when tested using a in/hg vacuum gage 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 water compaired to siphoning thereby improving gold recovery from cracks and crevices. With a single elongation stroke of the pump, these hand powered suction separator dredges are capeable of creating enormous suction at the nozzle end due to their sealed no leaks construction. ![]() Effortless operation makes all day GOLD hand dredging possible.Ĭlick Here M625 and M2125 Gold Nugget YouTube Video Best of all, it's ported to effortlessly pass 1 1/2" diameter cobbles, or attach the large 3 1/2" inner diameter, 1/2" mesh seive nozzle for suctioning and pumping massive amounts of pre-classified dredge material with fine gold into a free flowing sluice or a side loading bucket. The convoluted cylinder bellows "HG Power Plant" is reinforced from inside and out making the operation more like a "rocking" piston pump. ![]() The Model 625 Hand Dredge, works much like a typical recreational suction dredge, only the suction is Immediate Vacuum Response (IVR) and not dependent upon a power jet venturi's impeller produced siphoning vacuum that's driven by the mechanical force of an artificial gravity (see hydraulic mining monitor) type water pressure forced angularly into the dredge hose cavity. ![]()
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