Industrial Utility Efficiency    

Delta T Systems Introduces VSD Industrial Process Chillers

Delta T System ChillerA Delta T Systems Variable Speed Drive VS Chiller.

Delta T Systems introduces a new series of air- and water-cooled high capacity, Variable Speed Drive (VSD) chillers available from 40 to 60 tons. Designed to complement Delta T Systems’ line of 1- to 30-ton chillers, the new high-capacity VS Chiller series comes standard with four VSD compressors that operate effectively between 10 and 100 percent of rated capacity. As a result, the units operate more efficiently than any fixed-speed, hot gas bypass chillers in the 40- to 60-ton range.

The new chiller design applies proven, VSD compressor technology from the HVAC industry to produce up to 50% energy savings compared with traditional hot gas bypass regulation and also provides a quick payback period. To ensure reliability, Delta T Systems has engineered the chillers without vintage limit switches and capillary tubes. Adaptive controls ensure the chiller system will continue to operate in the event of a problem and will not completely shut down. The process can continue to operate without downtime and lost production until the root cause of a problem is identified and resolved. Highlights of the new chillers include:

  • Variable speed compressor and condenser fans for higher efficiency, reliability and quieter operation.
  • State-of-the-art controls that can regulate temperature to within 0.5 °F.
  • Oversized stainless steel brazed plate evaporators that reduce energy demand, as well as micro-channel aluminum condenser coils that eliminate galvanic corrosion.
  • One large central pump tank inside the cabinet.
  • Individual, redundant refrigeration circuits for improved reliability.
  • Industry 4.0 design and functionality compliance.

The chillers’ controls offer cloud-based, remote management with full-featured operational data sets. Process data including suction and discharge temperatures, water temperatures and pressures, tank levels and other critical inputs can be stored, viewed and analyzed locally, or remotely. Standard protocols, including Modbus and Ethernet, facilitate local and remote communication. It provides complete operational control including alarm management via a PLC, PC, tablet, or smart phone.

The complete Delta T Systems product range now covers applications requiring cooling capacity from 1 – 60 tons, with energy savings that return a quick payback on capital investments.


About Delta T Systems

Delta T Systems, located in Richfield, WI, has dedicated itself to one single discipline, process temperature control. Since 1990, Delta T Systems has helped production systems run more efficiently, thanks to their 160 years of combined experience, knowledge, and engineering know-how. Delta T Systems manufactures water and oil temperature control equipment, as well as, portable air and water chillers. Their full line of system solutions is available in many sizes to fit all process needs, with temperature control ranges from 0° F (-18 °C) up to 650 °F (343 °C). Incorporating sound fundamental engineering principles ensure customers receive accurate and reliable temperature control and years of unmatched performance. For more information, visit