Document 0L67OE3kVEXeKzLpX37zLEzkm

Plant Problems {Continued from page tig) When you're faced with shortages, need equipment parts, or must ship finished products to meet contract dates -- use (he speed and handiness of Air Express and your worries are over. Air Express is the fastest possible way to ship or receive; cuts days off shipping lime. Air Express goes on all flights of the Scheduled Airlines -- with air speeds up to S miles o minute. Special door-todoor service (no extra cost!) speeds up your shipments still more. Use the speed of Air Express regularly. Rates are surprisingly low. Specify Air &preS8-Woridfe fastest Shipping Sendee Low ratea -- special pick-up ud delivery In principal U. S. l&wnt and cities st no extra com Moves on all flights o! ail Scheduled Airlines. % Airmail between 23,000 ofl-eiriine offices. Direct air service to and from scores of foreign countries. Tra* (oh hluovyi Machine ports made in Camden were needed In Chicago. 32-lb. package picked up II a.m. the 28th, delivered S p.m. same day. 669 miles. Air Express charge only $6.88. Cave days more time to complete the Job. Other weight*, aoy distance, similarly inexpensive and /ail. Just phone your focal Air Expreas Division, Railway Expreas Agency, tor fast snipping action. SCHEDULED AIRLINES OF THE U.S; in. {132*1 One Tower Doesn't Take More Air HO will tones that the specifics^,' performance data under various eoadj. tiona, and the effectiveness largely upon the proper locsu^ Nevertheless, the f-d tower atith lakes nor requires 729k more air ioJ 309k more hp than the i-d. Instep the f-d cooling tower is eapable el do llveriog that much air at only more hp than the bd tower. Apparently, HB b primarily coo? earned about economical opertUon { tho cooling towers. From hit pig operating experience he must have ob served that no two days of operation are alike. Running cooling towen economically requires study sad alert ness on the pan of operators, sad oet merely button pushing. Unfortunately, I am unable to offer definite soggenlau as to most economical tower operation,' because HB did oot Include detalb u to operating sequence. Cooling towers reduce tempentan. by evaporation. Therefore, any temper* ature reduction accomplished b Un ited by the wet-bulb temperature of, the olr that b used to produce the evaporation. Theoretically a properly designed cooling tower should be shit to cool water to wet-bulb tempentan. Actually, however, It b not economies)^ to cool closer than 3 F to the wet-bob. temperatore, and attempU'to ppnud( it may be expensive. Carl Barhm*m.( Astoria, U I. Different Deilgns Give Vartoblo Results Dirrututcts or xmciswcr between th>, towers are due to design eondi'lWs The efficiency of so J-d cooling tow b usually higher than the same dud /d tower- In addition, there b often * difference in two 1-d eooliag towers ol equal capacity If they are made by different manufacturers. . The difference in ratings b not accurate Indication of efficiency, ft* example, the !S-bp motors may be or crating at 909b of load. Abo- * tower may be cooling more water or towering the temperature more thn Other. The information needed V make an accurate comparison between the two towers b volts, amperes, pbs* sod power factor of each motor< POWER February H# with CHAPMAN STEEL VALVES you get HIGH PRECISION and LONG LIFE Chapman Stoat Valves are pteciaion.tnade. Although manufactured with productfon-floe speed sod economy, they actually have the proeliloo mtagofcoJtoa'Qsdevaives-^vfJM/tfagor txtttJimg standard specifications. They are made with metals which are developed and produced in Chapman's own foundries uoder strict meuflurgtcal control, thus Insuring high performance and long life. Chapman Steel Valves are designed for pressures up to 1900 pouods per quart inch... for temperatures up to 1000* P., or eveo higher, and as low as --160* F. The Chapman Valve Manufacturing Co. INDIAN ORCHARO, NARRACHUStUR