YOU, too, CAN BE SURE petrochem-isoflow furnaces
_
are most economically desirable by any comparison W h e n e v e r all the specifications and all the operating requirements are applied to direct-fired furnace design, y o u can be sure P E T R O C H E M - I S O F L O W F U R N A C E S will be f o u n d most economically desirable, by any comparison. I n making comparisons it is essential to take these factors into consideration:
1—Average radiant transfer rate. 2—Maximum deviation f r o m average radiant transfer rate. 3—Average and m a x i m u m transfer rate in convection section. 4—Maximum tube wall temperature, radiant or convection. 5—Maximum efficiency with specified excess air. 6—Controlled thermal recirculation of flue gases t o provide even heat distribution throughout full length of each tube and equalized heat distribution around each tube. 7—Overload and corresponding transfer load. 8—Design t o provide: structural column supports—LaddersPlatforms—Tube Removal facilities, etc. 9—Degree of assembly; of t h e furnace structure and of t h e heating surface. When you specify PETROCHEM-ISO FLOW FURNACES . . . you'll be in good company. More than 1500 are now in ser vice, performing to the complete satisfac tion of their operators and usually well beyond their rated capacities.
PETROCHEM-ISOFLOW U N L I M I T E D
I N
SIZE
FURNACES
C A P A C I T Y
D U T Y
P E T R O - C H E M D E V E L O P M E N T C O . , I N C . · 1 2 2 EAST 4 2 n d S t . , N e w Y o r k 1 7 , Ν . Υ. REPRESENTATIVES: Rawson & Co., Houston · W m . H. Mason Co., Tulsa • Lester Oberholtz, i o s Angeles · Faville-Levally,Chicago · D. D. foster, Pittsburgh · Turbex, Philadelphia · Flagg, Brackett & Durgin, Boston · G. M. Wallace & C o . , Denver & Salt Lake City I n t e r n a t i o n a l licensees a n d Representatives: SETEA-S.A. Comercial, Industrial, y de Estudios Tecnicos, Buenos Aires, Argentine * Industrial Proveedora, Caracas, Venezuela · Société Anonyme Kuertey, Paris, France · Société Anonyme Belge, Liege, Belgium · Huertey llaliana S.P.A., Milan, Italy · Birwelco Ltd., Birmingham, England For further information, circle number 86 A on Readers' Service Card, page 117 A
86 A
INDUSTRIAL A N D ENGINEERING
CHEMISTRY
