FYI #011

Determine the correct style of chiller flow circuit is just as important as matching chilling capacity to a given process.

The following explains the major differences between the two types of flow circuits.

Standard Flow Chillers:

Standard flow chiller

  • Advantage standard flow chillers are intended to be used on closed loop processes, such as molds, rolls, dies, coils, etc.
  • Water returning to the chiller is dependent on flow generated initially by the chiller process pump.
  • If the loop is open to the atmosphere at any point, such as an extrusion trough, overflow will always result.

Reverse Flow Chillers:

Reverse flow chiller

  • Advantage reverse flow chillers are designed specifically for open circuit processes.
  • Notice that the flow circuit remains basically the same but the process acts as the chiller’s reservoir and gravity returns water to the pump suction.
  • System water make-up and level control is accomplished externally at the process since the chiller contains no reservoir.
  • A reverse flow chiller is identified by an “R” in the model number. For example: MG-10A-R
  • Turn on and off individual units.
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