GEA BOCK GMBH SEMI HERMATIC RECIPROCATING COMPRESSOR FKX50/775 K

The GEA Bock FKX50/775 K is a high-capacity, semi-hermatic reciprocating compressor engineered for demanding commercial and industrial refrigeration applications. Part of Bock’s renowned FKX series, it is designed for reliability, efficiency, and long service life in medium to low-temperature systems.

Key Features & Benefits

• Robust Semi-Hermetic Design:

  • Serviceability: The bolt-together construction allows for in-field maintenance, repair, and part replacement, unlike welded hermetic compressors.

  • Durability: Features a heavy-duty crankcase, cast iron cylinders, and rugged internal components to withstand high continuous loads.

  • Motor Protection: The integrated electric motor is cooled by refrigerant suction gas and is equipped with protection against overload and overheating.

• High Efficiency & Performance:

  • Optimized Displacement: With a large swept volume (775 cm³, as denoted in the model), it delivers high cooling capacity.

  • Valve Technology: Utilizes efficient ring plate valve design for low flow resistance and good part-load performance.

  • Application Flexibility: Well-suited for a wide range of refrigerants including R404A, R507, R134a, and natural refrigerants like R744 (CO₂) in specific variants, making it future-proof.

• Reliability & Longevity:

  • Forced Lubrication: A reliable oil pump ensures consistent lubrication of all critical bearing points under all operating conditions.

  • Vibration Damping: Internal balancing and optional rubber vibration dampers minimize noise and vibration transmission to the system.

  • Internal Protections: Includes features like oil pressure monitoring, motor winding thermostats, and optional crankcase heaters for safe operation.

• Application Versatility:

  • Ideal For: Supermarket parallel rack systems, cold storage warehouses, industrial chilling and freezing processes, and container refrigeration.

  • Typical Usage: Efficiently used as a compressor for low-temperature and medium-temperature applications in condensing units and custom-built racks.

Technical Specifications 

• Model Series: FKX (Large Semi-Hermetic)

• Displacement: ~775 cm³ per cylinder (exact total depends on cylinder count in the specific FKX50 variant).

• Motor Type: 3-Phase AC motor, integrated and refrigerant-cooled.

• Refrigerants: Compatible with HFCs (R404A, R507, R134a) and often available in versions for natural refrigerants (e.g., NH₃, CO₂).

• Capacity Control: Often compatible with optional cylinder unloading mechanisms for efficient capacity modulation.

• Mounting: Standard foot mounts for rigid installation on base frames or with vibration dampers.