/ Marley NC Class Cooling Tower / ® Q u i e t B y D e s i g n
Four-cell NC Class cooling tower serving a municipal power plant. T h e R esu lt of S ou n d E n gin e e r i ng The NC Class not only sets the benchmark for low sound levels it also sets the benchmark for some of the highest crossflow tonnage densities per box in the industry. For over 50 years NC cooling towers have delivered thermal performance, low maintenance, versatility of options and outstanding value. But, of even greater significance, the NC Class is now quieter.
■ Long Life Construction ■ Real World Design Available in series 300 stainless steel or rugged heavy mill galvanized steel. Marley ISO certified plants assure quality Designed for severe wind, seismic, shipping, operating and live loads. factory-assembly. Plus, the NC Class stainless steel tower comes with SPX Cooling Technologies’ exclusive 5-year ■ CTI Certified limited warranty. Plus, we guarantee the thermal performance of each ■ Low Operating Costs tower as installed.
NCclass ® In a C l as s by I t s el f
NC Fe a t u r e Hi g h l i g h ts ■ Air Movement Package Removable fan guard—welded heavy gauge rods. Hot dip galvanized after fabrication. Eased inlet fan cylinder—ensures full area, low turbulent airflow through the cylinder. High efficiency fan—wide-chord design for maximum efficiency at low fan tip speeds. Marley System 5 Geareducer drive—requires no oil changes for five full years. Offers significant savings ® in maintenance costs. Marley SofTork coupling absorbs excessive shock loads at start-up.
All NC Class cooling towers are designed for low sound levels using high blade-count, wide-chord fans for maximum efficiency at low tip speeds. For those extreme, low sound applications, consider the NC Class low sound “L” models. To achieve the very lowest possible sound levels while maintaining efficiency, “L” models are carefully selected with the best available combination of motor, drive ratio, fan blade-count and blade profile.
Popula r O pt i o n s ■ Single Inlet Connection—choose from either side inlet or bottom inlet connections. All piping from the inlet connection to the distribution basins is part of the tower package*. ■ Control Systems—ranges in sophistication from standard fan starters and disconnects to Programmable Logic Controllers that work in conjunction with your building or process system. ■ Handrail and Ladder—provides sturdy and stable access to the top of your tower.
Technical Reference Manual TECH NC provides engineering schematics, data, and information necessary for initial tower layout. See your Marley sales representative for a copy or download at spxcooling.com. Product Specifications SPEC SSNC and SPEC NC detail the tower in the form of specification language, and provide technical as well as common-sense information on the importance of your specifications.
