HallScrew – Single Screw Compressor

At the heart of the J&E Hall product range is the unique HallScrew ammonia single screw compressor which has an enviable worldwide reputation for quality, durability and energy efficiency. HallScrew compressors are used within our standard compressor pack range and Aquachill low charge ammonia chillers.

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The key to the success of the HallScrew, a single screw ammonia compressor from J&E Hall, is its outstanding reliability. With only three basic moving parts involved, a main rotor which meshes with two diametrically opposed star wheels, results in balanced compression. The HallScrew single-screw compressor is extremely robust and offer a long main bearing life of over 100,000 hours.

The HallScrew also features a high efficiency capacity control mechanism to regulate the capacity with corresponding reduction in power input. For ease of maintenance, the side casing canbe removed to give access to all parts without removing the machine from its installation.

J&E Hall has now launched additional models to the open drive range which have been designed and manufactured using worldwide group facilities. New models will enhance the existing range and complete the series between 898 – 2100 m³/h.

Benefits of the HallScrew compressor:

  • Ease of installation
  • Ease of maintenance
  • Engineered for quiet operation
  • outstanding reliability
  • superior efficiency
  • wide ranging cooling capacities.


  1. Complete range of displacements from 175 – 2486 m³/h
  2. Available for use on ammonia, natural, or traditional refrigerants
  3. Fixed or variable volume ratio
  4. Infinitely variable capacity control mechanism
  5. Outstanding reliability
  6. Ease of maintenance
  7. Engineered for quiet operation
  8. Superior energy efficiency


The HallScrew single-screw compressor is suitable for industrial refrigeration, air conditioning and heat pump systems. It is used in the most varied of applications including deep freezing, process cooling, retail, brewing, petrochemical, marine and oil and gas.

Check the resources tab for the HallScrew product brochure with additional information.


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