06NA2146S7NA-A00 Screw Refrigeration Compressor

The 06NA2146S7NA is a 75 HP industrial screw refrigeration compressor designed for air-cooled chillers, large-scale HVAC systems, and process cooling plants. Engineered with a high built-in volume ratio (Vi = 3.5), this model delivers a volumetric displacement of 146 CFM at 60Hz and 203 m³/h at 50Hz. Its patented rotor profile geometry optimizes mesh compression efficiency while maintaining low power consumption when paired with eco-friendly R134a refrigerant.

Constructed for severe duty cycles, the 06NA2146S7NA utilizes SKF or NSK rolling bearings backed by heavy-duty axial thrust bearing assemblies, eliminating the need for frequent maintenance inspections. The unit integrates a complete internal safety network, including an internal check valve to prevent rotor reversal at shutdown, a safety relief valve, an internal oil filter to block fluid contaminants, and a discharge muffler to reduce operational sound levels.

Driven by a high-strength motor featuring built-in NTC thermistor thermal protection, the 06NA2146S7NA supports both Star-Delta (Y-Δ) and Direct-On-Line starting across standard global power grids. Solenoid-actuated 3-stage capacity control (100% - 66% - 33%) adjusts output to match dynamic cooling loads. At 380 kg net mass, with 2-5/8 in suction and 4-1/8 in discharge ports, this screw refrigeration compressor combines structural durability with exact load matching.