Grease rises to the top of the pit and hardens. The size of the basin can be a huge disadvantage a larger basin than normal is only a slight advantage. Grease is a very challenging media for any ejector pump. The absolute worst application in a commercial building is a basin that receives waste from a grease trap. When should one fight for that space? When is it ok to shrink the size of the pit? Any application where solids will be introduced to the basin should raise a red flag. This is where your knowledge of the application will cause you to fight for that space or make the decision to allow for a smaller pit. With that said, the demands of modern day building design may not allow for this. Most codes state that the minimum sump level is three feet below the lowest inlet in most cases, this is simply not enough. Here is a rule of thumb for proper usable basin space: Proper level control requires a minimum of four feet from the lowest inlet to the bottom of the basin, and you need at least a foot on the outside of each pump and a foot between them (if not more) depending on the type of media you will be pumping. The size of the basin will vary, of course, on the amount of flow coming into the basin and the depth of the lowest inlet. Photo courtesy of Liberty Pumps Inc.īy sizing the basin properly you will allow for enough room for all equipment in the basin and for proper access from above through the basin cover. Vertical pumps have been around the longest of the ejectors, around 100 years. The basin should be sized along side of the selection of pumps, controls, and accessories. Basin size is the most important part in this crucial first step of ejector system design. Selection of basin material is usually determined by size, local code, and, of course, cost. The basin is available in different types of materials: fiberglass, polypropylene, steel, cast iron and concrete. We begin with the ejector basin itself, which also is known as a wet well, sump, or pit.
This article explores the inner workings of ejector systems - specifically, the ejector basin, the different types of ejector pumps, and system controls.
0 kommentar(er)
