Athermal dryer
HL
HL athermal dryers use dual desiccant towers and strategically positioned valves to dry compressed air. The simple technology of the heatless dryer transfers a portion of the dried compressed air to an off-line tower. Dry air then flows through and regenerates the desiccant. Although operating costs are higher than heated desiccant dryers, the HL series requires the lowest capital investment.

high quality air. Proven high performance desiccant technology provides -40°C (-40°F) pressure dew point air for critical applications; pre-screen and post-screen programs protect desiccant and downstream air from oil contamination and particulates.
Easy to maintain. Low profile design and easily accessible components simplify installation and maintenance.
Reliable operation. High strength desiccant and durable valves and components for extended life
Reduce energy use. The low pressure drop design saves energy costs and provides an economical drying solution.
Smart control. An easy-to-use, advanced microprocessor helps keep dryer performance at optimum levels while constantly monitoring functions and providing maintenance alerts and protection notifications.

heatless dryer
The simplest of the three technologies, a heatless dryer diverts a portion of the compressed air that is being dried to another location.
The dryer transfers a portion of the dry compressed air to the off-line tower.
The air is diverted to the off-line tower. This dry air then flows through
Pass and regenerate the desiccant.
The purified air, now full of moisture, was harmlessly
Exhaust to atmosphere through a muffler.
This technology has the lowest capital investment, but can be more expensive to run.
It can be more expensive to operate because it requires a portion of the dry compressed air to be diverted into the air system to achieve regeneration of the desiccant.
HL heatless dryer
Heatless dryers provide the lowest
capital investment. From air compressor to air system,
Every Ingersoll Rand dryer includes durable, easy-to-maintain valves for high-strength desiccant for unmatched
Reliability, performance and customer value.