Hitachi GLS Screw Refrigeration Unit Constant Speed Single-Stage Compression R404A
Hitachi Global Life Solutions
Single-stage compression screw refrigerating machine [R404A] with extended maintenance cycle and enhanced reliability.
Adoption of next-generation refrigerant R448A The refrigerant used is the non-flammable new refrigerant R448A. It has reduced the global warming potential by approximately 64% compared to the conventional refrigerant R404A and by about 33% compared to refrigerant R410A. Improved refrigeration capacity through the adoption of a subcooling circuit [R448A water-cooled constant speed type] The adoption of a subcooling circuit has significantly improved refrigeration capacity. Extended overhaul (disassembly maintenance) cycle to 24,000 hours or 5 years of operation, up to 40,000 hours or 5 years of operation due to the adoption of a simple compressor structure The single-stage compressor can apply a differential pressure lubrication method by using rolling bearings throughout, simplifying the lubrication system and eliminating moving parts such as suction and discharge valves, thereby enhancing reliability. Furthermore, by adopting a semi-hermetic structure with an integrated motor, there is no need for a shaft seal required in open-type refrigeration systems, eliminating concerns about refrigerant leakage from the sealing area.
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basic information
- Refrigerant: Next-generation refrigerant R448A (non-flammable), approximately 64% lower global warming potential compared to R404A and approximately 33% lower compared to R410A - Type: Fixed-speed type, single-stage compression - Overhaul cycle extended from 24,000 hours or 5 years to 40,000 hours or 5 years - Semi-hermetic structure with no shaft seal, reducing concerns about refrigerant leakage - Adoption of a subcooling circuit to improve refrigeration capacity (R448A water-cooled fixed-speed type)
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Applications/Examples of results
This is a single-stage compression condensing unit used as a cooling source for refrigerated and frozen warehouses for food and logistics, as well as for process cooling. It features a simple compressor structure with fewer moving parts, making it suitable for applications that prioritize reliability and long-term maintenance.
Line up（3）
| Model number | overview |
|---|---|
| RSU-R402SAEC | |
| RSU-R502SAEC | |
| RSU-R602SAEC |
Company information
Kyushu Kiden Co., Ltd. not only sells electrical and mechanical products such as air conditioning equipment, industrial machinery, air compressors, elevators, escalators, and lighting fixtures as a Hitachi sales agent, but also provides solutions that contribute to energy conservation and decarbonization (SDGs), including the currently popular solar power generation (PPA), biomass power generation, and waste heat recovery units. The company is also certified as a planner for ZEB (Net Zero Energy Building), which has recently gained attention in corporate energy-saving measures, and has received great acclaim for its comprehensive energy-saving proposals for entire buildings. 【Service Areas】 - Fukuoka, Saga, Kumamoto, Oita, Yamaguchi, Hiroshima, Osaka 【Major Qualifications】 - First-Class Plumbing Construction Management Engineer - First-Class Electrical Work Construction Management Engineer - Designated Construction Industry Supervisory Engineer (Plumbing) - Designated Construction Industry Supervisory Engineer (Electrical Work) - First-Class Electrician - Chief Technician for Water Supply Equipment Construction - First-Class Refrigeration and Air Conditioning Equipment Construction Skill Technician - Building Equipment Engineer - First-Class Civil Engineering Construction Management Engineer - Third-Class Refrigeration Machinery Manufacturing Safety Manager - Refrigeration and Air Conditioning Construction Safety Management Certificate - Refrigerant Handling Technician Certificate - First-Class Hitachi Refrigeration and Air Conditioning Technician (Air Conditioning and Low Temperature) - And many others.
