Gold and sand hand dredge9/22/2023 ![]() Model 625 HDP with Experimental Gravity Trap Concentrator* and Rock Lashing Kit Effortless operation makes all day GOLD hand dredging possible.Ĭlick On Picture for Concentrator YouTube VideoĬlick Here YouTube M625 HDP GOLD Nugget Suction Power VideoĬlick Here Watch under water action Inside the EGTC GOLD concentrator 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. Basically the same type of mechanical force gravity (see hydraulic mining monitor) fed water pressure would create being forced into the dredge hose at a slight angle to produce that siphoning action. 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 that suction dredges use.
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