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20 MARINE REVIEW August, 1925 Diamond Model B Rear End Soot Blowers Shoot a Solid Stream of Steam Into Each Boiler Tube Diamond Model B Rear End Soot Blowers for Scotch Marine Boilers are permanently installed through the rear water leg, a hole being cut in the plates and a section of the boiler tub- ing expanded and beaded into place. The nozzle revolves with the turning ofacrankwhich operates a gear mech- anism. The revolving of the nozzle is accomplished correctly and evenly so that the path traced by the steam jet is a spiral as shown in the illustration be- RSS 1 SERN Naa NR ANE UL II NNR PRCA. NEW YORK OFFICE: low. Three revolutions of the nozzle are sufficient to move the jet from maximum to minimum radius. Three more revolutions reverses the process from minimum to maxi- mum. As shown in the illustration above the foregoing operations shoot dry steam into each tube with a draft ata terrific velocity, sweeping and scouring the soot from the full length of the tubes. Write for your copy of Bulletin 153. sR RRA OME ENE TN REARS 90 WEST ST. DIAMOND Power SPECIALTY CORPORATION DETROIT, MICH. Please mention MARINE REVIEW when writing to Advertisers