|
|
But consider that when contract crews clean rarely are they supervised by someone who owns the equipment of uses it the next day. Think also of the cleaners'' perspective and experience with equipment. They can powerwash their $150 gas lawn mower and it starts right up afterwards, so how come they can''t hose off the front of a $30,000 combi-oven or the burners of a $5,000 range or griddle?A look at this year''s National Restaurant Association Restaurant, Hotel-Motel Show directory reveals that there were more than a dozen manufacturers exhibiting all sizes and types of pressure-washing or steam-cleaning equipment. One has to wonder what foodservice equipment manufacturers think all those units are going to be used for--washing parking lots? It''s time for a reality check! EarthForce America, Summerville, S.C., is the marketing headquarters for Superstav in North America. All machines are sold in North America under the EarthForce brand nameKubota Tractor Corp. USA, an American affiliate of Kubota Corp. in Japan, offers consumerguidedrillpresses two models of mini-backhoe loaders, the B21 and L35. The company is second in the marketplace and imports its machines from Japan. KTC, which started selling machines in the U.S. market in 1972, is headquartered in Torrance, Calif. The company''s B21 machine is rated 21 hp and features hydrostatic consumerguidedrillpresses drive, while the L35 is rated 35 hp and has a mechanical Glide Shift transmission for clutchless shifting. The bigger machine has a 9 ft. digging depth. Ingersoll Equipment (not to be confused with Ingersoll-Rand Co.) is located in Winneconne, Wis. The company started consumerguidedrillpresses producing small consumerguidedrillpresses backhoe loaders in 1983. Current models include 18 hp and 20 hp machines and a larger addition is being discussed for 2001. Both the 6018 BH and 6020 BH loaders have a digging depth of 7.5 ft. and both machines are very light at less than 3000 lb. This article describes this new compressor technology and its first use in an ARI-certified chiller design.THE BEARINGSTraditional centrifugal compressors consumerguidedrillpresses and consumerguidedrillpresses use roller bearings and hydrodynamic bearings, both of which consume power and require oil and a lubrication system. Recently, ceramic roller bearings, which avoid issues related to oil and reduce power consumption, were introduced to the HVAC industry. The lubrication of these bearings is provided by the refrigerant itself. (1)Magnetic-bearing technology is significantly different. A digitally controlled magnetic-bearing consumerguidedrillpresses system, consisting of both permanent magnets and electromagnets, replaces conventional lubricated bearings. The frictionless compressor shaft is the compressor''s only moving component. It rotates on a levitated magnetic cushion (Figure 1). Magnetic bearings--two radial and one axial--hold the shaft in position (Figure 2).
|