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A heatless desiccant air dryer is a type of compressed air dryer that uses desiccant material to remove moisture from compressed air. Unlike heated desiccant dryers, it does not require external heating for the regeneration process. Instead, it relies on a portion of the dried compressed air (purge air) to regenerate the desiccant. 

How does a heatless desiccant dryer work?

A heatless desiccant dryer works by using desiccant material to remove moisture from compressed air without the need for external heat.
  • Drying Phase: Wet compressed air is directed upward through a bed of desiccant material, such as activated alumina, silica gel, or molecular sieves. The desiccant adsorbs the moisture from the air, drying it as it passes through.
  • Regeneration Phase: In heatless desiccant dryers, a portion of the dried air from the drying phase is expanded to atmospheric pressure and then passed through the saturated desiccant in the opposite tower. This process forces the adsorbed moisture out of the desiccant and into the atmosphere. After desorption, the blow-off valve closes, and the vessel is re-pressurized.
  • Switching: Once the desiccant in the regeneration tower is depleted of moisture, the process switches so that the now-dry tower becomes the drying tower, and the previously drying tower undergoes the regeneration process.
 

What are the benefits of using heatless desiccant dryers?

Heatless desiccant dryers offer several key benefits that make them a popular choice for compressed air systems.
  • Cost-Effective: Heatless desiccant dryerseliminate the need for external heating, reducing overall energy costs.
  • Simplicity: Heatless desiccant air dryershave fewer parts compared to heated models, leading to potentially lower maintenance requirements.
  • Affordability:Heatless desiccant dryers come with a lower purchase price than their heated counterparts.
  • Varied Applications: Heatless desiccant dryersare available for a wide range of industrial applications where moderate drying is needed.
 

What are the features of Lingyu’s heatless desiccant air dryer?

Lingyu manufactures high-performance heatless desiccant air dryers with the following highlights:
  • Integrated Design
Our refrigeration and adsorption heatless desiccant dryers are designed for a small footprint and easy installation with advanced technology.
  • High-Performance Pneumatic Valve
The heated regenerative desiccant air dryer features a high-performance pneumatic valve that offers reliable operation, sensitive action, rapid switching, and a long lifespan.
  • High Torque Aluminum Alloy Pneumatic Actuator
Equipped with a high-torque aluminium alloy pneumatic actuator, our heatless desiccant dryer ensures smooth operation with substantial torque, enhancing performance and reliability.
  • Advanced Adsorbent Technology
Utilizing a high-performance adsorbent with robust adsorption and abrasion resistance, the heatless regenerative desiccant air dryer maintains a stable dew point and prevents pulverization over extended use.
  • Full Electronic Programmable Controller
The heatless desiccant air dryer incorporates a full electronic programmable controller with a Chinese interface, making it easy to understand, operate, and maintain.
  • Low Operating Noise
Designed with silent check valves and high-performance silencers, the dryer minimizes noise during both operation and exhaust processes.
  • Automatic Pressure Filling Function
The automatic pressure-filling function pre-fills the valve before switching, equalizing cylinder pressure to avoid fluctuations that could impact the adsorbent, thus extending its lifespan.Experience the efficiency and reliability of Lingyu’s heatless desiccant air dryers. Contact us to find the perfect solution for your moisture control and enhance your compressed air system.

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