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OIL ke | SPIRAL OIL FILM iN > OIL IN 4 iw E = &CONDENSATE |= - E iw ual : be = u j= iS A single pass LL Coen Heater is furnished in two sizes... Patented. No. 1,455, 164. STEAM IN The three pass Heater is built in one size only. Pat- ented. No. 1,573,223. CO .. for efficient heating: COEN OIL HEATERS Designed without coils, tubes or in- side joints, Coen Steel Oil Heaters have the added feature of cleanabil- ity. While hundreds of them have been operated for years without the necessity for cleaning arising, they can however be taken apart and the heating surface scraped. They are furnished in two types, and may be used individually or hooked in multiple, depending upon the quantity and viscosity of the oil to be handled. The single pass heater is built in two sizes, the 7”x40” and the 12”x50”. The three pass heater is constructed in one size only with an O. D. of 13” and a length of 54”. Coen Heaters have an unusually large capacity for the overall area of the unit. A single unit will handle per hour the following amount of fluid: With Oil in at 90° and Oil out at 200° and steam pres- sure of 100 lbs., the 7”x40” will clear 700 lbs., the 12x50” - 1,400 Ibs., while the 13”x54” will handle 5,000 lbs. The capacity will naturally vary according to oil temper- atures and steam pressures. All Heaters are tested to 500 lbs. hydrostatic pressure before leaving the factory. Write for Bulletin 15 giving full details. COMPANY INC. COMBUSTION ENGINEERS Manufacturers of Fuel Burning Systems 610 SOUTH BROADWAY, LOS ANGELES, CALIF. 112 Market Street Post Dispatch Building 50 Church Street SAN FRANCISCO HOUSTON NEW YORK MARINE REVIEwW—March, 1931 57