Fixed Ejector and Surface Sluice
These types of dredges are lightweight, capable and do not cost a fortune. Most of them are made so the ejector rapidly removes from the pressure box so that modifications to another suction nozzle can be made in the future.
Some of them have their ejectors right above the water level however the most liked ones are the ones that have the base of the jet around one foot or more under the surface. These are available in different sizes and have different pump capacities. At the bottom end of the range there are the 1and ½ and two inch models. There are certain ones that are lightweight and they can be taken to remote areas by one or two people that are backpacking. There are a lot of experienced gold dredgers that utilize them as prospecting tools and they dredge spots along the stream and mark the areas that they believe are potential so they can then take in the heavier equipment.
The middle range of the dredges is the ones that are in 2 and ½, three and four inch sizes. What you decide to get depends on how much you are willing to spend obviously as well as on the type of operations you are planning on doing as well as the amount of space you have available for transporting everything, so keep all those things in mind. The ones that are smaller can normally fit inside of the trunk of a car and the ones that are larger can fit inside a station wagon.
The problems most people have are with floats though. There are plastic ones that can be transported if you have a roof rack on your vehicle and the inner tube type allows you to save a good amount of space because they can be deflated when you need to transport them.
For the professionals there are fix, six and eight-inch versions, bigger ones are available too but they need to be specially ordered. These types are for the people that are really into placering and that are doing so for a living – or dedicating all his time into it. The individuals that acquire these types usually have a deposit they are interested in cleaning out. There are eight-inch versions that have two centrifugal pumps placing two jets into the ejector. These have a suction that is very powerful and a lot of them have been used in depths ranging of fifty feet or more.
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