Page 295 - Applied Process Design For Chemical And Petrochemical Plants Volume III
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                     Figure 10-181. Typical drive arrangements for air-coolers. (Used by permission: Griscom-Russell/Ecolaire Corporation.)


                       Fan guards of wire grating or hardware cloth are    ever, a close fan guard, Figure 10-182, will prevent blade con-
                     mounted below the fan to prevent accidental contact with  tact by the operators.
                     the moving blades and to keep newspapers, leaves, and   Tubes, Figure 10-183A and 10-183B, are usually finned
                     other light objects from being drawn into the fan. The use of  with copper, aluminum, steel, or a duplex combination of
                     a wire fence around the entire unit is good to keep unau-  steel inside with copper or aluminum fins outside. Other
                     thorized individuals away from all of the equipment; how-  combinations are used to suit the service with the ratio of
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