High-pressure refrigerated dryers up to 3747 scfm

THP series: Extraordinarily reliable up to 725 psig

Kaeser THP-series refrigeration dryers (*) truly show their mettle when maximum reliability at high working pressures is required – such as in PET container production. High-quality components and excellent manufacturing ensure your units will enjoy premium moisture protection for the long-term – even at high ambient temperatures.

  • Reliably dry compressed air to 3747 scfm
  • For working pressures up to 725 psig
  • For ambient temperatures up to +110 °F

Your advantages

  • Long-term operational reliability:
    With a copper-soldered stainless steel plate-type heat exchanger and generously-sized condenser and heat exchanger, THP refrigerated dryers deliver long-term reliability.
  • Outstanding low differential pressure values:
    All THP dryers shine with optimal differential pressure values thanks to their special flow-optimized pipework made of stainless steel.
  • Condensate drainage without pressure loss:
    The 45-bar models of the THP series are equipped as standard with a high-pressure version of the ECO-DRAIN 12 condensate drain, which ensures reliable condensate drainage with zero compressed air loss – and tangible energy savings!

* The refrigerated dryer contains fluorinated refrigerant. THP 8-50 to THP 283-45 models use refrigerant R-134a. THP 354-45 to THP 1061-45 models use refrigerant R-407A.

The perfect partner: the KCF oil/water separator
KCF condensate filters

Our tip: Take advantage of cost-effective, legally-compliant treatment of condensate before drainage into the regular wastewater system with KCF oil/water separators.


Product details



  • Tower design with removable side panels
  • Powder-coated enclosure panels
  • All materials are CFC-free
  • All cold unit parts are insulated
  • Integrated control cabinet with electronic controller
  • Air/air and air/refrigerant stainless steel plate-type heat exchangers
  • Internal compressed air pipework made of copper
  • Condensate drainage system
  • Electronic condensate drain
  • Delivered filled with refrigerant and oil

Refrigerant circuit

  • Refrigerant circuit consisting of reciprocating compressor
  • Fan-condenser assembly
  • Filter / dryer
  • Capillary tubes
  • Insulated air/air and air/refrigerant stainless steel (copper soldered) heat exchanger with integrated condensate drain
  • Hot gas bypass controller

Condensate drainage

ECO-DRAIN condensate drain, high pressure version

  • Electronically controlled high-pressure version of the ECO-DRAIN 12 condensate drain – fitted as standard in the 650-psig THP dryers; optional in the 507 psig and 725 psig versions

Application example (schematic)
THP high pressure refrigeration dryer – example installation