Refrigeration compressed air dryers

Hankison HHD series refrigerated compressed air dryers increase productivity

The basic HHD Series refrigerated compressed air dryers provide the ideal combination of technology and simplicity to dry your compressed air system to a pressure dew point of + 3C up to 1.700 m3/h.

Dew point              +3°C
Flowrate                 20-12,000m3/h
Connections           3/8” to DN200
Maximum pressure up to 50bar

Designed to be durable and reliable.

All dryers in the HHD Series have been designed for a long service life. The housing is constructed from sturdy sheet steel and is protected by a high-quality powder coating. The reliable refrigeration system works with the environmentally friendly refrigerant R-134a.

 

How it works(flowrates up to 100 m3/h)

Warm saturated air enters the evaporator (A) where it is cooled by refrigerant being controlled by a constant pressure expansion valve (B). Water vapour condenses into a liquid for removal at the moisture separator (C) by an automatic drain (D). The cold, dry air is reheated as it passes through the reheater (E) to prevent pipeline sweating. The static condenser (F) eliminates the need for a cooling fan and simplifies the system.

How it works(flowrates 140 to 1.700 m3/h)

Refrigeration Circuit:

A refrigerant compressor (1) and air cooled condenser (2) continuously circulate refrigerant through the system. The filter-dryer (3) removes contaminants from the refrigerant gas. An expansion valve (4) regulates the fl ow of refrigerant into the 3-in-1 heat exchanger.

Compressed Air Circuit:

Warm, saturated compressed air enters the air-to-air heat exchanger (5) and is cooled by the exiting air. The precooled air (6) enters the air-to-refrigerant heat exchanger (6) and is further chilled causing water vapour to condense. Condensed moisture is collected from the air stream by an integral separator (7) with stainless steel demister. Liquid condensate is removed from the separator by an automatic timed electric drain/ level-controlled automatic drain. Cold air is then reheated in the air-to-air heat exchanger to eliminate pipe-line sweat. Clean, dry air exits (8) the dryer and is now conditioned for use.