8/19/2023 0 Comments Swivel dredge nozzleBut with a suction nozzle it's usually going into a crash box or something similar that agitates the slurry too. In a jet setup it does too, but then it's reagitated when it passes the pressure inlet in the jet right before it hits the box. Suction nozzles also clog up way way more than jets, especially if you are using a jet with one of the newer style quick connectors that have no internal upsets between the hose and the jet.Įdit: caution cone? never heard of anything like that.Įdit 2: Also there is some debate that suction nozzles actually get better recovery rates because the slurry can settle by weight in the hose before it hits the sluice. Unless you really got some shallow pay that needs dredging. Way too unwieldly (2 hoses versus 1, plus the nozzle is just lots bigger and no swivel). I wouldn't use a suction nozzle on anything bigger than a 3" personally. One goes straight down the nozzle with no resitrictions, the other (in a jet) usually hits the side of the jet tube at some angle, dispersing energy. If you look at the pressure line inlets in both a jet and suction nozzle I think you can see why. There has been some studies done that show that using a suction nozzle in place of a jet connected directly to your flare actually has greater suction than a jet. So you won't rooster tail your sluice if you pull it out of the water.Īlso, there is some debate as to which nozzle has "better" suction. With a suction nozzle, it's the nozzle itself being primed by the pressure line, and the pressure flow is directed right down the center of the suction line where it connects to the nozzle. Since the pressure line goes directly into the jet and into your flare you are going to rooster tail out high pressure water straight outta your box. Made here in the good old USA by me, Sam the PoorMan"Īt 11:30 it shows our Keene 2.5 x 1.I don't think it's cavitation proper, it's just that when you pull the nozzle outta the water when using a jet then you are going to lose the prime on the jet. Requires A pressure "around" 110 GPM (gallons per minute) or 6,600 GPH (gallons per hour). Any 1.5" NPT pressure hose can be easily secured to the nozzle via the welded 1.5" NPT threaded coupling. These suction nozzles are 2.5 inch in diameter and work with 2.5" inlet suction hose. They come with a 2." rolled stainless steal ring welded to the tip for less chances of clogs and better flow when lager size rocks tend to get stuck. "They are made out of 16gauge Stainless steel for durability and longevity from Rust. A P180 runs over 350gpm and here's what he says is needed for his nozzles on ebay. Pull the suction hose off and run a wire back up through it to make sure there's nothing in the jet. The 15 feet of 1½ instead of 2" shouldn't make a difference. So look at the orifice on your old one and compare them. The orifice should be around ½ to ¾ and I would bet that this nozzle may be designed for a smaller motor with a 3/8" orifice. There is either a clog in the jets tube going into the nozzle or the reducers orifice is too small for the P180. With a P180 that should suck your fingers off with the ring on, so. It doesn't mean you can't still move rocks around with the nozzle, just let it do it's job. That effectively prevents overfeeding the sluice too. I don't dredge but that seems to me to be the best technique anyway since it mostly allows steady suction and flow all of the time without surges or temporary stoppage of material being sucked up. That gives you the impression it is not sucking as hard when actually, overall, it is but some of the suction is unproductively diverted through the gap when you hog or put it directly on a large rock.* I think you just have to get used to the way it is designed to work and I think that is.that it probably works best (lets the dredge suction do the work) when held just next to the gravel rather than trying to gouge or hog it. You probably are used to gouging or hogging the material with the nozzle (that kind of forms a seal on a regular nozzle) and this nozzle will leak around that seal. If you were to put your hand over the ring and seal that gap you will probably have the same suction you are used to. I don't know if it is the same but the one I saw has a ring that is welded at an angle so that one edge of the ring touches the nozzle and the opposite edge is 1/4" or so away from the nozzle forming a gap.
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