The Castel 5640 series is an oil level control system engineered for maintaining proper oil levels in refrigeration compressor crankcases across multi-compressor parallel rack configurations. It regulates oil distribution to prevent oil starvation in individual compressors while avoiding crankcase overfilling, both of which can lead to premature compressor failure and reduced system efficiency.

How does the 5640 series maintain oil balance in parallel compressor systems?

In a multi-compressor refrigeration rack, oil naturally migrates unevenly — some compressors run rich while others starve. The 5640 series mounts directly to each compressor crankcase and modulates oil feed based on the actual oil level: it opens to admit oil when the level drops below the set point and closes when the correct level is restored. An integral strainer between the oil reservoir and each regulator prevents debris from interfering with valve operation. The system is rated for 32 bar maximum operating pressure and is compatible with common HCFC and HFC refrigerants used in commercial refrigeration.