Rotary Screw Compressor Aftercoolers

One of the primary advantages of an aftercooler in a rotary screw compressor system is its ability to remove excess heat generated during compression. Rotary screw compressors work by trapping air between two rotating screws, compressing it as it moves toward the discharge port. This process generates significant heat—often pushing the air temperature to 200°F or higher. Without cooling, this hot air carries a high level of water vapor, which can condense into liquid water as it travels through the system. An aftercooler rapidly cools the compressed air, typically bringing it within 10-20°F of the ambient temperature. This cooling causes moisture to condense and separate from the air, which can then be drained away, delivering drier air to downstream applications.

  • Enhanced Durability: Our aftercoolers cool rotary compressor air, reducing heat stress on gears and bearings for longer life.
  • Improved Air Quality: Removes moisture from rotary systems, ensuring cleaner, drier air for sensitive tasks.
  • Optimized Performance: Lowers temp in rotary units, boosting efficiency and reducing power draw during operation.
Water Cooled Aftercoolers
Sanitary Applications
  • Fixed or Removable Tube Bundles
  • Material Options Available
  • Standard and Custom Options
Shell and Tube
Air Cooled Aftercoolers
Sanitary Applications
  • Use Ambient Air to Cool
  • Variety of Motor Options
  • Standard Pressures of Up To 250 psi
Plate and Frame

For users, this moisture reduction is a game-changer. Many applications powered by rotary screw compressors—such as pneumatic tools, spray painting, or food and beverage processing—require dry air to function effectively. Excess moisture can corrode tools, ruin finishes, or contaminate sensitive products. By stripping out water vapor, aftercoolers ensure the air meets quality standards, reducing the risk of damage or rework. While a downstream air dryer might still be needed for ultra-dry air, the aftercooler significantly lightens the load on these systems, making them more efficient and extending their lifespan.

Another key benefit is the protection aftercoolers provide to the compressor system itself. Rotary screw compressors are often part of larger setups with filters, dryers, and piping. Hot, moist air can stress these components, leading to corrosion, clogged filters, or reduced airflow over time. By cooling the air and removing moisture early in the process, aftercoolers minimize wear and tear on downstream equipment, cutting maintenance costs and downtime.

While rotary screw compressors are already designed for efficiency compared to some alternatives, uncooled air can create backpressure or inefficiencies in downstream processes. By delivering cooler, denser air, aftercoolers optimize the performance of pneumatic equipment, ensuring it runs smoothly with less strain on the compressor. This can translate into lower energy consumption over time.

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