High Pressure Heatless Air Dryer

High Pressure Air Dryer

Working Principle

The term "desiccant dryer" refers to a broad class of dryers. Other terms commonly used are regenerative dryer and twin tower dryer, and to a lesser extent adsorption dryer.

The compressed air is passed through a pressure vessel with two "towers" filled with a desiccant material. This desiccant material attracts the water from the compressed air via adsorbtion. As the water clings to the desiccant, the desiccant "bed" becomes saturated. The dryer is timed to switch towers based on a standard NEMA cycle, once this cycle completes some compressed air from the system is used to "purge" the saturated desiccant bed by simply blowing the water that has adhered to the desiccant off.

The duty of the desiccant is to bring the pressure dew point of the compressed air to a level in which the water will no longer condense, or to remove as much water from the compressed air as possible. A standard dew point that is expected by a regenerative dryer is -40 °C , this means that when the air leaves the dryer there is as much water in the air as if the air had been "cooled" to -40 C . Required dew point is dependant on application and -70 C is required in some applications.

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LP,MP,SP - Series


  • Supplied as a complete unit,which is ready for use.
  • Complete system available with prefiltration and final filtration.
  • Even if power fails it giving uninterrupted air flow.
  • Least maintenance required.
  • Low initial cost.The heatless method contribute to low maintenance and is most reliable.
  • They are self-regenerative and produce low levels of noise.
  • The specially designed digital electronic control for the variable cycle of
  • adsorptiondryer allows automatic switching off of the regeneration air.
  • This resulting in lower cost expenditure.
  • Designed for efficient working with least pressure drop.
  • Secure operation by performance regulation
  • Secure operation with implemented performance control
  • All components requiring maintenance can easily be accessed from one side
  • The specially designed high-efficiency dryers can be used in all applications
  • and the regeneration air flow can be adjusted to suit the particular operating
  • Conditions.Therefore running cost reduced.
  • Heavy duty Purge exhaust Silencer for quite operation.
  • Control panel,designed in a proper way,thus giving a better access to the
  • control elements and to the displays
  • Highly accurate electronic timer.
  • Designed to meet the requirements of ISO 7183.
  • Dried air as per requirements of ISO 8573-1 class 3-3-4.
  • Painted for aesthetic look and additional protection.
  • Easy to operate.
  • No moving parts and hence high reliability.
  • Electronic timer enables accurate cycle timing.
  • It requires only 230V,ac power supply to operate the system.


  • Instrument and Control Air
  • Process Control Instruments
  • Textile Machines
  • Machine tools
  • Bearing air
  • Air Motors and Heavy Air motor miniature
  • Packaging machine
  • Pneumatic cylinder
  • Sensors in fluid technology
  • Sand blasting unit
  • Handling of food and beverages
  • Semi conductor manufacturing
  • Wind tunnels
  • Pharmaceutical manufacturing
  • Conveyance of hygroscopic products
  • Paint spray and Powder coating


  • Desiccant Tower:

  • Desiccant tower with corrosive protection.
  • Stainless-steel support screens and air diffusers.
  • Large desiccant bed, ensures to produce -40C dew point
  • Each tower is provided with pressure gauge
  • Filters:

  • Each dryer is equipped with a Pre-filter to protect desiccant from free water contamination, dust, scales and oil etc., and an after-filter to avoid desiccant dust carry over.
  • Each filter fitted with manual condensate drain valve ,Optional automatic drain valve
  • Pressure Gauge:

  • Pressure gauges on each tower for easier illustration of working of dryer.
  • Valves:

  • Specially designed Valves, which act as main flow and exhaust valves.
  • Check valves with well designed orifice for highly accurate purge flow.