Desuperheater / Vacuum Water Chillers

Chemical-free refrigeration and flash cooling applications

About Desuperheater

Croll Reynolds vacuum water chillers / Desuperheater are a low cost-solution to cooling high volumes of water for the chemical, pharmaceutical, food and paper industries. These unique system uses our multi-nozzle ejector technology in multiple stages to draw vacuum on various chambers of a chiller tower and gradually cool down the required flow of water to 1.5° – 10° C depending on the starting temperature of supplied water.

Croll Reynolds chiller systems incorporate two to five multi-nozzle ejectors a chill tank with internal weirs, downstream of which will always be a two-stage ejector (air pump), piping, controls, and instrumentation for easy and proper operation of the system. With over 300 vacuum chillers online worldwide, Croll Reynolds is acknowledged as the leading designer and industry supplier. Croll Reynolds has designed and constructed three of the world’s largest vacuum chillers for the chemical and petrochemical industries. This equipment has assorted applications; it can be used to chill sand and gravel during dam construction and support the careful processing and chilling of fresh produce, meat, and grain products.


Vacuum Chiller tower utilizes multiple stages of our multi-nozzle boosters in series to create gradually increasing vacuum on multiple chambers of the chilling tower; The water running through different chambers is then chilled usually to temperatures in the range of 1.5° – 10° C., although in many processes, liquids are cooled to even lower temperatures. The drawing below shows how Croll Reynolds’s CHILL-VACTOR uses this principle in a typical water-chilling units. Water to be chilled enters the chill tank and flows over a weir plate. When the water meets the vacuum in the chill tank, it boils instantly. The weir distributes the water in the vacuum chamber. Heat energy is released as the water vapor expands and the water temperature is lowered. The chilled water is then removed by a barometric leg or pump. It is circulated through heat exchangers, air conditioning equipment or other process equipment and returned to the chill tank. If part or all the water is required for process use, fresh water is fed continuously into the chill tank. In circulating systems, make-up water amounting to approximately 1% for each 5.5° C of cooling is added.

  • Chemical –product distillation, drying, flash cooling and more
  • Power Plants – removal of non-condensable gas for turbine efficiency 
  • Oil and Gas – refinery processes, product distillation and more
  • Pulp and Paper – product crystallization, evaporation and more