Article  Understanding the Different Types of Gravel Screening Machines Gravel screening machines are versatile heavy equipment used by the mining, construction, chemical, landscaping and quarrying industries.  These versatile workhorses are what enable companies to separate a gravel aggregate from sand, topsoil, compost and a host of other types of rock and debris.  The beauty of these machines is that there is such a wide array of sizes and models so that you can find the right gravel screening machines for your needs. Whether you are a multi-national mining company or a small business owner doing residential landscaping, a gravel screening machine can be right for you.   The sizes of gravel screening machines range from portable models that can be hand-fed materials with a shovel, to gigantic machines that must be towed to the work site by truck.  There are also different types of equipment using different mechanisms for the actual screening process.  The three most common styles are static screens, rotary screens and vibrating screens.    Static gravel screening machines are the most basic style.These usually have a free-standing box with the screening system standing over it.  When aggregate is fed over the top of the screen, smaller, finer materials simply filter through the screen and into the box, while larger particles such as gravel and rock slide down over the bars atop the screens and onto the ground.  These static systems are relatively inexpensive, but aren't as accurate in screening since some finer particles will not filter down through the larger pieces and will be missed.   Rotary gravel screening machines use a large drum that tumble the materials, allowing the smaller particles to sift down and fall through screen openings on the bottom of the rotary drum.  The drum is usually slightly angled so that the larger material slides down to one end and out of the drum.  Rotary screening plants are often used at larger industrial sites and in quarries or mines.  They are more efficient than static machines, but also more expensive and tend to be larger. There are a few models, however, that are suitable for medium sized jobs.   The most popular of the gravel screening machines for a variety of uses is the vibrating gravel screen.  This system uses a large, flat screen that vibrates as materials are fed onto it from above.  The vibration of the screen naturally allows the smaller particles to sift through to the bottom, where they fall through the screen.    Vibrating gravel screening machines are extremely versatile, and a compost screen is as well.  With some models, you can use an upper and lower deck if you want to screen out two different sizes of material. This allows you to have three different sizes of end product at the end of your screening.  You can also use a variety of different screen sizes on the same machine as you move from job to job.  For instance, if you are on site doing a landscaping job and need to remove old mulch from topsoil, there is a screen available for this sorting. On another job you may need a coarser sort to remove gravel from smaller or larger rock; there is a screen for this sort job.  Many different models of vibrating screening machines allow you to simply remove one screen and snap another into place. Vibrating machines come in an impressive array of sizes, from small models you can put in the bed of a pick-up truck to industrial models for large-scale jobs.  You may also find that you prefer the relative ease of maintenance with vibrating gravel screening machines.  They are usually easy to maintain, yet provide far more versatility than static machines of the same size.  Whatever your company's screening needs are, there are gravel screening machines to fit your every need. Category New Construction Author Admin Add To Favorites Print This Article Email Article To A Friend Post Comments   Rate This Article (2) 1 - Poor2345 - Good678910 - Excellent Added On 2009-04-22