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Application Case: 4A Molecular Sieve in Air Compressor

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Background

4A molecular sieve air drying
4A molecular sieve ensures ultra-dry, oil-resistant compressed air, improving dew point, reducing costs, and boosting efficiency in industrial air systems.

An industrial manufacturer required ultra-dry compressed air (dew point ≤ -40°C) for its production line. Traditional refrigerated dryers couldn’t meet the standard, and activated alumina was prone to oil contamination. The company upgraded to a 4A molecular sieve adsorption system.

Solution Overview

System Setup:

  • Air Compressor: 55kW screw type (10m³/min, oil content 3ppm)
  • Pre-filter: Removes water and particles ≥1μm
  • Adsorption Tower: Twin-tower design with 4A zeolite desiccants, switching every 5 mins
  • Post-filter: Ensures final air quality (oil ≤0.01ppm)

Why 4A Molecular Sieve

  • Superior Drying: 0.4nm pores effectively adsorb water, dew point maintained at -50°C
  • Oil-Resistant: More tolerant of oil mist than silica gel or alumina, with 30% longer lifespan
  • Energy Efficient: Regenerates at 150°C—20°C lower than alumina—saving 15% in energy

Results

  • Stable Dew Point: Consistently below -50°C, supporting precision coating processes
  • Lower Costs: Adsorbent lifespan extended from 6 to 18 months; 40% less maintenance
  • Energy Savings: 12% lower regeneration power, saving ~21,000 kWh annually
4A molecular sieve wholesale

Industrial Cases

  • Layered Filling: Activated alumina below for oil capture, 4A sieve adsorbents above for moisture
  • Smart Regeneration: Humidity sensors adjust cycles to avoid overheating

Industry Impact

Ideal for industries with strict air quality needs—food, pharma, electronics.
4A zeolite offers a reliable alternative to conventional desiccants, especially in systems with variable oil levels.

Note: For best results, regular performance checks and a 3-stage filtration system (oil, dust, sterilization) are recommended to meet ISO 8573-1 Class 1 standards.

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