Baltimore Aircoil Company

Model VXI - Closed Circuit Cooling Towers



VXI closed circuit cooling towers include quiet internal centrifugal fans for minimal surrounding noise. Single-side air inlet, and a quieter tower rear for more noise-sensitive areas. Cut operation noise still further with factory-designed and tested sound attenuators.

Reliable operation guaranteed

  • Since 1978, thousands globally installed, proving the VXI coolers reliability
  • Fans, motor and drive system (V-belt) are located in the dry air, preventing moisture and condensation.  No external moving parts, helping it withstand the toughest weather.
  • Various corrosion-resistant materials, including the unique Baltibond hybrid coating for guaranteed long service life.
  • Optional extended surface coil with steel fins for dry operation

More compact

  • Compact design for confined spaces,
  • Single-side air inlet lets you install next to solid walls,
  • Units housable indoors thanks to centrifugal fans allowing intake or discharge ductwork.

Reduced shipping, rigging and installation costs

  • VXI units are factory-assembled. We ship larger models in 2 sections to reduce the size and weight of the heaviest section for easy on-site assembly with smaller cranes
  • Single fan side requiring fewer motor starters to install and wire.
  • VXI offers high capacity and minimal operating weight. Save on steel supports, both underneath the equipment and in the building itself for rooftop installations.
  • VXI-C models can be container-shipped (in 10’ containers). Fan enclosures shippable loose in the tower bottom section for easy on-site assembly.

  • Small to medium HVAC and industrial applications
  • Tight enclosures and installations requiring a single air inlet
  • Indoor installations
  • Sound critical installations
  • High temperature industrial application
  • Dry operation in winter time

  • Reliable
  • Quiet
  • Compact


Warm process fluid (1) enters through a heat exchange coil (2) and gets water sprayed on by the spray system (3) at the top of the cooling tower. At the same time the centrifugal fan (4), located at the bottom of the unit, blows ambient air upwards (5) through the tower. During operation, heat is transferred from the internal circuit coil to the water, and then to the atmosphere as a portion of the water that evaporates. The cooled down fluid then exits the unit (6). The tower sump (7) or basin collects the remaining water. The spray water pump (8) recirculates the water up to the water spray system. The warm saturated air (9) leaves the tower through the drift eliminators (10), which remove water droplets from the air.

Material options

  • Heavy-gauge hot-dip galvanized steel is used for external unit steel panels and structural elements featuring Baltiplus Corrosion Protection.
  • The unique Baltibond hybrid coating is an optional extra. A hybrid polymer coating for longer service life, applied pre-assembly to all hot-dip galvanized steel components of the unit.
  • Optional stainless steel panels and structural elements of type 304 or 316 for extreme applications.
  • Or the economical alternative: a water-contact stainless steel cold water basin. Its key components and the basin itself are stainless steel. The rest is protected with the Baltibond hybrid coating.

Heat transfer media

  • Our heat transfer media is a cooling coil. In comprehensive lab thermal performance tests, it showed proved thermal cooler performance and offers you unrivalled system efficiency.
  • The coil is constructed of continuous length of prime surface steel, hot-dip galvanized after fabrication. Designed for maximum 10 bar operating pressure according to PED.
  • All hot dip galvanized coils are delivered with BAC's Internal Coil Corrosion Protection, to ensure an optimal internal corrosion protection and guaranteed quality.

  • Try our optional extended surface coils with selected rows, finned at 3 to 5 fins per inch and hot-dip galvanized after fabrication, for dry operation during winter time.
  • Optional stainless steel coils are in type 304L or 316L.

Air movement system

  • With motor-driven centrifugal fan and a V-belt drive.  You can easily remove the entire motor base for proper belt tensioning to ensure constantly correct belt alignment. Together with the heavy duty fan shaft bearings this guarantees optimal operational efficiency. Single- and multi speed motors available.
  • Centrifugal fan(s) are forward-curved and nearly noiseless. Overcome external static pressure! Use sound attenuators and duct work etc. for air intake/discharge with no loss of thermal performance!
  • Our drift eliminators come in UV-resistant plastic, which will not rot, decay or decompose and their performance is tested and certified by Eurovent.  They are assembled in easily handled and removable sections, for optimal internal access.
  • Steel eliminators, protected with the unique Baltibond hybrid coating, for optimal corrosion protection, are also available for specific applications.

Water distribution system

These consist of:

  • A header and spray branches with wide non-clog plastic nozzles, secured by rubber grommets. You can easily remove, clean and flush both nozzles and spray branches.
  • A cold water basin with:
    - strainers which are easy to lift out and the anti-vortexing device also helps stop trapped air
    - mechanical make up
    - circular access door
  • Close coupled, bronze fitted centrifugal spray pump with totally enclosed fan cooled (TEFC) motor. Bleed line with metering valve installed from pump discharge to overflow.

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