Nortec Compressed Air & Gas Drying Products and Fluid cooling equipment.

Externally Heated Dessicant Dryer

High Volume. Low Cost.

Externally Heated Regenerative Compressed Air Dryers are ideal for general manufacturing and process industry applications. In External Heater models, purge air is heated outside the desiccant bed, then passed over the bed to regenerate it.

Nortec externally heated regenerative dryers provide a low -40º F/C pressure dew point for superior air line moisture protection, while offering the efficiency of convection-heated desiccant regeneration.

They feature:

  • Isolated External Heater for extra safety
  • Intelligent Valve Control for the most reliable tower cycling.
  • Heatless Back-Up Mode to prevent loss of production in the event of heater failure or maintenance.

Should you need guidance determining which type of dryer works best for your operation, our on-staff experts are happy to do an analysis and make recommendations. You can request assistance here.

Externally Heated Desiccant Dryer
Dryer Operation (BPD)

Industry-Standard Performance
And Exceptional Quality

Optional Features

Standard Features

Model No.Inlet FlowInlet/Outlet ConnectionsDimensions L x W x H (inches)Weight (lbs)
150-EHD1501” NPT34x35x76890
200-EHD2001” NPT34x35x76910
250-EHD2501 1/2” NPT40x40x761110
300-EHD3001 1/2” NPT40x40x831250
375-EHD3752 1/2” NPT50x44x851400
500-EHD5002” NPT50x44x901600
650-EHD6502” NPT50x44x901900
800-EHD8003” FLG70x55x1052900
1000-EHD10003” FLG70x55x1054190
1250-EHD12503” FLG80x60x1094550
1500-EHD15003” FLG80x60x1095360
2000-EHD20003” FLG100x85x1106900
2500-EHD25004” FLG100x85x1108100
3000-EHD30004” FLG110x89x1209400
Blower Purge Models
External Heater Dessicant
How To

Nortec Performance Advantages

The performance of any desiccant dryer depends on the quality of its key components. Nortec uses the best available valves, controllers and
desiccant. With accurately designed and sized components, the dryers are manufactured to provide you with years of trouble-free operation.

Quality Desiccant Media

Nortec uses a mixture of adsorption media in its heatless range of desiccant dryers to achieve consistent dewpoint. Activated Alumina, Molecular Sieve and Silica Gel are used in varying ratios depending on the application. The long lasting, high crush strength media has a very high surface/volume ratio.

Electronic Controllers Provide The Information You Need

All Nortec heated desiccant regenerative dryers are equipped with the state of the art PLC controllers that regulate and monitor dryer function. A simple user interface allows the operator to quickly enter settings and monitor operations, including dewpoint selection, energy cycle, diagnostics, and more. The unit can also be connected to a remote computer.

Digital Dewpoint Transmitters Optimize Operations

The digital dewpoint transmitters are compact, reliable and continuously monitor the dryer performance. With available options, monitors can be used as indicators, alarm units or as controllers. A simple interface permits the operator to choose between multiple units, output the data to a PC, set alarm levels and do field calibration of the sensor.

High Efficiency Blower

High-Efficiency Blower

High-Efficiency Blower The centrifugal blower is sized optimally to provide a continuous stream of air to the heater for regeneration. The blower is equipped with an intake filter, a muffler for quieter operation, and check and relief valves for high-pressure safety.

Angle Body Piston

Angle Body Piston Valve

These high-performance, 2-way direct acting valves are designed for reliability and durability. It uses a profiled disc in conjunction with a high-resolution compact positioner and linear feedback potentiometer to provide precise proportional flow. The stainless steel internals and a tough fiber composite actuator body, along with the use of oversized bearing and Viton® seals, make it possible to consistently provide smooth piston movement for years of trouble-free service.

Butterfly Valve

Butterfly Valves for Precise Control

These versatile, high-performance butterfly valves are used by Nortec to provide you with precision control and complete bubble-tight shut off. The digitally controlled actuators provide easy PLC interface and feature fast response time. The tongue-and-groove seat design feature ensures complete isolation of flowing media from the body and stem. Rugged and reliable, these valves are designed to provide years of trouble-free service.

Check Valve

State-of-the-Art Check Valve

High-temperature, wafer-combination swing check valves are flow activated. The elliptical shape of the inlet port accelerates the inlet media through the valve. The disc’s angle and shape allows the air to travel faster around the disc, thus creating lift like an aircraft wing, and opens the valve in full position even at low flow rate.

Check Valve Certifications