Equipment purchase costs screens

Conveying-screen dryers are fabricated with conveyor widths from 0.3- to 4.4-m sections 1.6 to 2.5 m long. Each section consists of a sheet-metal enclosure, insulated sidewalls and roof, heating coils, a circulating fan, inlet air distributor baffles, a fines catch pan under the conveyor, and a conveyor screen (Fig. 12-51). Table 12-23 gives approximate purchase costs for equipment with type 304 staimess-steel hinged conveyor screens and includes steam-coil heaters, fans, motors, and a variable-speed conveyor drive. Cabinet and auxiliary equipment fabrication is of aluminized steel or stainless-steel materials. Prices do not include temperature controllers, motor starters, preform equipment, or auxiliary feed and discharge conveyors. These may add 75,000 to 160,000 to the dryer purchase cost (2005 costs). 

Several vendors manufacture liquid dispensers, plate storage and incubator devices, and plate detection instruments that are the three major components used in compound screens. Selection of equipment is usually based on several factors including need, previous experience, recommendations, cost, available funding, and quality of post-sale service provided by the instrument vendor. Many instruments from different manufacturers such as the photomultiplier tube (PMT)-based plate readers exhibit similar function and performance. Therefore, reliability, cost, and service quality become the dominating factors for purchase decisions. 

Enter the size parameters and then click the Evaluate button, shown in Figure 6.3d. This runs the evaluator program and gives the results screen shown in Figure 6.3e. The purchased equipment cost is 145,900 on a January 2006 USGC basis. The installed cost is 196,225. Note that the installed cost is calculated directly by estimating bulk materials and labor rather than using an installation factor. 

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