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. 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! Standard setting: With the sluice box at water height as shown below. to ramp a pump up for maximum suction at the nozzle, the effect on fine gold recovery may be negative. 5 gallon bucket and gold pan for cleanup. 1 ½ camlocks are supplied with the dredge for easy hose pump connection. Requires A pressure around 180 GPM (gallons per minute) or 10,800 GPH (gallons per hour). Any 2.5 NPT pressure hose can be easily secured to the nozzle via the welded 1.5 NPT threaded coupling. Gold Rat supply prospecting equipment to many markets around the world including PNG and new Zealand where dredging is very common. Pressure hose for pump connection to dredge. These suction nozzles are 3 inch in diameter and work with 3 inlet suction hose.
Now for the tricky part: convert backwards and finally come up with a bore diameter.Įductor size is. Dredge nozzles are illegal to use in Australia without a dredge permit on an active Claim for gold please familiarize yourself with your local restrictions. All of our dredges are equipped with 'Nomad' matting for the entire length of the sluice box. 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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