Industrial Refrigeration Compressors

Reciprocating Compressors
Reciprocating compressors are the rugged workhorses of the refrigeration cycle, utilizing a piston-driven volumetric design to handle high compression ratios in both high-stage and booster applications. These units are categorized into three primary configurations—hermetic, semi-hermetic, and open-drive—to meet varying capacity and serviceability needs. Stellar provides exact-match replacement units for sealed hermetic configurations and offers precision compressor rebuilds for serviceable semi-hermetic and open-drive models. By sourcing critical components such as crankshafts, connecting rods, and valve plates, we ensure your machines are restored to OEM specifications and maintain the peak volumetric efficiency required for your facility’s continuous operation.

Rotary-Screw Compressors
Rotary-screw compressors are the primary choice for high-capacity industrial refrigeration, providing continuous, pulse-free operation for large-scale cooling loads. These machines utilize rotary compression architectures—including both twin-screw and single-screw designs—to compress refrigerant vapor with exceptional volumetric efficiency. They are highly favored for their ability to utilize integrated slide valves for precise capacity control across shifting plant loads. Stellar supports your rotary-screw fleet through the sales of replacement units and expert precision rebuilds, focusing on critical tolerances such as rotor balancing and bearing alignment. We provide national sourcing for high-wear components—including shaft seals, oil filters, and gasket kits—ensuring that your compressors from brands like Frick, Vilter, Mycom, and GEA maintain the mechanical integrity required for 24/7 operation.

Centrifugal Compressors
Centrifugal compressors are dynamic machines engineered for high-tonnage applications and large-scale process cooling. Unlike positive displacement designs, these units utilize high-speed impellers to move massive volumes of refrigerant, converting kinetic energy into pressure with exceptional high-flow efficiency. Often referred to as "turbo" compressors, these machines are prized for their ability to maintain steady-state loads over long service intervals. To prevent performance degradation or mechanical surge, maintaining the integrity of the impeller assemblies, volute seals, and high-speed bearings is critical. Stellar manages the national sourcing of specialized OEM components—including precision seal kits and specialized bearing assemblies—to ensure your high-capacity systems maintain their intended design capacity and operational efficiency.

Scroll Compressors
Scroll compressors utilize an orbital compression movement between two interleaved spirals to provide efficient, vibration-free operation for smaller thermal loads. While these units do not have the capacity required for large-scale applications, they are highly effective in small-scale refrigeration systems and specialized process cooling. Because scroll compressors are typically hermetically sealed units, they are not serviceable or rebuildable in the field. To address this, Stellar provides exact-match replacement sales to ensure rapid system restoration when a unit fails. We source high-quality replacement scroll compressors to keep your refrigeration systems and smaller cold rooms operating with minimal maintenance overhead.