Never have another boring clean out, ever again! See You Tube Video Demo The key is the intermittent pumping action and flushing out excess material accumulations in the concentrator during the hand dredging operation. The concentrator serves as a low pressure area for black sand and gold to settle which becomes quite obvious with any users first clean out after hand dredging in gold bearing streams, creeks and rivers. Pump a few cubic feet of the dredge material in and as it's ramping up the Deep-V surface, the heavier values will tend to settle as the the lighter over burden flushes out. The EGTC eliminates the need to build a miners dam or struggle to get the angle and water flow inside the sluice set right! Once the angles set, the intermittent pumping action insures maximum efficiency with the EGTC Gold Concentrator. Find a rock and secure the concentrator using the cargo lashing kit then stretch and shape this flex pipe so that the material is being pumped "UP HILL"! A rise of 7" calculates to about a 45 degree angle. 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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