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Self-Cooling
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TM-5-3895-374-24-2 M081 Asphalt Mixing Plant Manual
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TM 5-3895-374-24-2 applications SIHI’s  ZTN  self-cooling  centrifugal  pumps  may  be  used in installations with positive or negative suction pressures for a wide variety of applications: •  The Chemical Industry heating of agitators, reactors, drying plants, polymerization plants, plants for conveying    highly    viscous    products    and    producing plastic material and synthetic fibers. •  The Rubber & Plastic Industry heating of calenders, melting   pots,   automatic   injection   molding   machines and power presses. •  The  Food  Industry  heating  of  baking  and  fish-frying ovens,  rendering  plants,  distillation  of  fatty  acids  and glycerine  and  production  of  milk  powder  and  potato chips. •  The   Paper   Industry   &   Laundries   calender    rolls, production of corrugated cardboard, heating of laundry machines and industrial ironers. design Utilizing  the  latest  heat  transfer  pump  technology.    SIHI ZTN pumps are specially designed to provide: •   Uncooled Shaft Sealing •   Shaft Sealing Virtually Free From Leakage •   High Efficiency •   Low  Operating  Temperatures  at  Shaft  Seal  and  Ball Bearing Areas •   Minimal Product Heat Loss •   Avoidance of Thermal Stress •   Reliable Bearings, Low Vibration The  back  pull-out  design  permits  the  removal  of  the bearing  housing  and  complete  rotating  element  toward the  driven  end  without  removing  the  pump  casing  from the suction and discharge piping.  With a spacer coupling installed,   the   complete   bearing   housing   and   rotating element   are   removable   without   disturbing   the   motor. Only two shaft assemblies are required for the entire 24 model range.  Within each shaft assembly, shafts, radial shaft  sealing  rings,  impeller  nuts,  sleeve  bearings,  ball bearings,  bearing  covers  and  miscellaneous  hardware items   are   interchangeable.      Pumps   are   designed   to compensate for thermal expansion by distinctly separating the sealing element and the bearing housing. Since the sealing unit can freely expand in axial direction without  affecting  the  axial  position  of  the  shaft  in  the bearing housing, a standard coupling is utilized. (page 3 - 1135)







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