Document zzayRGe0bLrYj738VEawGn3ZB

SCIENCE LIBRARY^ fjje magazine of MAY 5 1955 energy systems engineering ^ 1965 ONE DOLLAR A M c G R AW- HILL PUBLICATION DUSTRIAL WASTE TREATMENT: The growth years ahead iss fed district heating and cooling is on the upswing.......................... 51 'sto prevent feedwater loss to boilers during light load................... 56 oil desulfurization the next step in air pollution control?.............. 62 fresh thinking on use of expansion joints for flue ducts................. 66 can benefit from modular design of industrial boilers............ 68 EQUIPMENT NEWS Longer-lasting drive belts used for light machinery 10 This V-belt offers improvement in its cover and internal construction. The cover, of neoprene-impregnated fabric insures prolonged resistance to higher operating temperatures, ozone, oils and chemicals. It also is formu lated to conduct static electricity, pro viding safety in hazardous atmos pheres.--Gates Rubber Co Spark gap device used as primary protector 11 Designed as a primary pro tector in communications and con trol equipment, this spark gap devil protects against transient overloads the type generated during an el cal storm. It features three metal all electrodes hermetically sealed in ceramic and metal package and v switch 55 coulombs per line, or a tol of 110 coulombs. The 60 cycle b: down voltage may vary from 300 1100 v and is established by prof spacing of the line-to-ground el trodes and the type of inert gas for backfilling. -- Sylvania Eled Products Inc Test loop for heat-transfer problems 12 Recently placed in operation^ this thermal transient test loop is de*: signed to study stress analysis probr* lems in power plant piping, valves anf^ other components. Typical capabit* ities are: stress determination in symetrical shapes; testing of bi-metal*; lie welds; determination of radii; R/M distributors and Big 7 Packings R/M 363 saves Nopco Chemical Co. $1,613 yearly in maintenance costs The seal around the agitator shafts of 750-gallon pressurized mixing kettles was a constant headache at Nopco Chem ical Co., Carlstadt, N. J. An authorized R/M packing distributor cured it with the use of R/M 363. This premiumgrade, braided asbestos packing with a special lubricant not only provided direct savings of over S 1,600 per year, but also gave Nopco almost 300 man-hours to devote to maintenance of other equip ment. R/M 1550 piston cups seal even > high-speed cutting temperatures /JgJf Pneumatic cylinder leakage at Corning Fiberglas, Barrington, was solved by R/M 1550 piston Recommended by an authorized c^lStr^r. tor,f they resist the temperatures ated by the cutter operating at sP^i of 90 cycles/minute, have shown wear when changed after 6 Former packing failed even though cooled, jammed valves and slowed K, duciion. Distributor inventory is a ?*c value--cuts customer's stock req,.^. ments, permits deliveries in hours-g?. POWER * MAY 1** Begins on page 120 gxxiperature distribution in parts or ecimens; determination of disconnuity stresses in pipe j oint welds and roof testing of analytical methods or thermal transient stress analysis, specifications for the loop include: 000 psi pressure rating: 670 F temp- ature; 108 lew immersion heating; 0 million Btu per hr cooling; 70 to 650 F hot loop; 60 to 150 F cold oop; 300 gpm at 170 ft head pump capacity; thermal transient capacity p or down, 525 F in two seconds; transient frequency, as desired within eating/cooling capacity; 1V'2 in. ndard specimen size, 2500 psig "ange size 1 in. thick and 12 channel -ording oscillograph. -- Copes-VulDiv, Blaw-Knox Co Insoluble impurities can be "detected in liquids 3 An automatic instrument that tects, measures and records the miiitest insoluble impurities in liquids is sensitive enough that it can note the presence of two solid particles in a billion parts of water. In addition to monitoring impurities, the device reg isters color variation. Basically the in strument uses a membrane filter test --insoluble solids are removed from a liquid or gaseous sample by an ultrafine filter membrane and retained on the filter surface where they are easily identified, sized, and counted.--Grav er Water Conditioning Co Just circle numbers on the Reoder Service cord, page 193, to get complete product story Air cooled water chiller is weatherproof 14 A packaged air cooled wrater chiller specifically designed for out door installation is housed in a heavygage, textured aluminum casing to eliminate the need for engine room space. The units are available in seven standard models from 16 through 44 nominal tons.--McQuay, Inc Ball valve swings away, doubles as union 15 By loosening two bolts and re moving one, center section of this valve swings out for aligning and soldering. When center section is bolted into place, valve is operable. continued -best problem-solving combination! 5^ There are few, if any, maintenance packing problems that can't be solved by the combination of R/M packing distributors and R/M Big 7 Packings. And most of the time the right packing for your application can be taken out of a distributor's stock. An R/M Big 7 Selection Chart and full details of the case histories are avail able. Ask for them. PACKING DIVISION, RaybestosManhattan, Inc., Passaic, N.J. SEND FOR YOUR SELECTION GUIDE TODAY. Sew from R/M: "How to Be a Success Dugh Failure" his sound slide film gives valuable tips on how to reduce packing costs and sim plify maintenance by extending gasket hd packing life through proper selec tion and installation. Showings can be heduled at your convenience--and at charge--by calling your authorized R/M packing distributor or writing us your business letterhead. New Jersey Engineering & Supply Co., Passaic, N.J. tlndustrial Pump & Supply Co., Woodbury, N.J. , natmt uliciiok aum MECHANICAL PACKINGS > GASKET MATERIALS SPECIALTY PRODUCTS Raybestos-Manhattan, Inc. 3WER MAY 1965 For more facts circle 297 on Reader Service card, p 193 123