Document vBZyoynD81dpw1K0yXJ58x3p6

More TECHNICAL BRIEFS ------ -------------- -- - _. ge/i n po 130 all cost picture must be examined crit ically ob an economic basis, and mis uiBRiCAttr INCREASED BEARING 1)FE FROM 2 WEEKS TO 2 YEARS" decisions must be governed largely by suck results. Present day cycles tend toward higher operating pressures and temperatures, some around 2000 pel and 1050 F, and with low makeup require ments, Frequently 1% or less. Some published maleriel dealing gen erally wltn ibo process of demineroiiulion have led the authors to a general observation that, in many Instances, a greater importance appears to be given to tome (acton thao is warranted. For --soys THE GLOBE COMPANY 'v----J--' V "Animal odds and moIturo, moat harmful to ball and roller bearings prevail* In the entire meat packing Industry. With conventional lubricants, some of the bearings In our Roto-Cut machines did not Tost two weeks. Since using Dali Bearing L-uoh>pu*tb in machines operating com tlnuously 24 hour* a day (or over t*o years, we have not had a single bearing replacement." cor nearest lAJBftlttATBdistributer, see Classified Telephone Directory. Send for free 66-pago ``La/bbiplaTE Data Soon". .. a valuable treatise on lubrication. Writo Lubhipustb Divi sion, Flake Brothers Refining Co., Newark 6, N. J. or Toiodo 5, Onto. REOARPIESS OP THB SIZE example, a study may show a distinct advantage for demineralization by em ploying a water having e composition particularly well suited for this process. Or, a detailed study of demineralisation chemical operating costs may entirely ignore other cost factors which dollarwise may have even greater significance. Likewise, a general Impression appears 1 to exist that the intangible merits of the derataereliiatfon process should be a major deciding factor. Where the design engineer is con fronted with a new b-p unit installation or new plant, his decision as to makeup production by evaporation or demineral isation should be based fundamentally on the economies. The intangible merits and disadvantage* of each process should be recognized as such sod their effect on guiding a decision be placed AND TYPE OF YOUIt MACHIN ERY. I.U BRI P LATE In proper perspective. This paper otiempts to etaasify and define the besle economic factors and LUBRICANTS W)U IMPROVE ITS OPERATION AND REDUCE to show their relative Importance, by employing a specific ease as an example. All discussions have two basic prem MAINTENANCE COSTS. ises: 1. That the effluent.of a dcmioeralizer and the vapor from an ovaporator are of equal purity or the difference Is so slight that no significant effect on makeup requirements due to boiler blowdown Is evident. 2. Thai straight-forward two-bed or single-bed demineralisation will be em ployed without the complication of mod ified arrangements that may be desir able with certain waters to achieve de sired results. Without acceptance of these basic considerations as well, as others the authors bring out later, any economic study (or b projected plant could be come so involved with minor considera tions as to make a reasonable comparf- 1 on difficult. Once the economica of the study direct the engineer to e decision, the required details of minor financial 1 significance may then be developed with* out their obscuring ike main picture. I A stepwise economic study covering I a specific case has been presented to ' vi For QUALITY jJPYLE-NATlONAl wuibme| % to 120 h.p; Special alloy working parts, ond permanent rubbe-to-metal bend, provide trouble-free corrosive service. The Pyls-National lina,, highly efficient impulse typfl turbines is IdeaHor dopedTM able mechanical drive m email machinery aocVe pumps, fa no, blowers, staleq. abrasive wheels, agUolaq] and generators particular where the exhaust steamau_ be used for heating ando&rj purposes. Since 1897Pylo-Natioflolhv< manufactured their turbine entirely within their ownplod ... thus assuring peiifJrt control of quality and work manship through all rtaqe1 of production ... from ib! material to the final testis* bind how fob Bvuxrtfi containing complete Infer** Uon on these small and a* dium capacity turbines. TVBBO-GENERA TOSS '*] Also available Is bulletin Pylo-Naiional turbo-geo^atom (500 to ISOOO swWi THE | PYIE-NATIONALN COMPANY H tr M. KOIfNiB AVI CMICAOOn OiiWtl ONIct end I*prefttoUf*t I* S.lJr Ciitai at tka Untied Stall* FLOODLIGHTS . PUEf CONDUIT FITIIIW Meeting the "Acid Test" the low-cost way with DARLING rubber lined iron bodyvalves! OU ran save deHart by install* Ylog Darling rubber lined, Iron ronton. Tight closure is assured every time. And wear oq working body gate valves for corrosive serv- parts is uniform. icjup to 150*F. These Darling In plantafter plant Darling rubber gate valves are giving outstanding rvice in job after job. fined, revolving disc, parallel seat gate valves are setting records of You This Plus Value Toe! efficiency end economy. These *nw/f/y rew/vmg double diiC, pSf* unique rubber lined valves are made 'sear principle compensates in rising stem, cylinder, motor- automatically for valve body dis* operated, or quick-opening types. Ask for the special Darling rubber lined gate and cheek valve bulletin. VALVES FOR EVERY NEED Darting also offers gate v|i In t wide range of sizes, types and construction for all kinds of normal and unusual service . . . and for pressures up to 1900 pounds. DARLING VALVE & MANUFACTURING CO. Williamsport 8, Pa, Manufactured in Canada by Sandilandt Valve Manufacturing Co., Ud., Gaft, 19, Ontario 2 sown auouit AUGUST |05) 321