06NW2250S7NA-A00 Semi Hermetic Screw Type Compressor

The 06NW2250S7NA-A00 is a high-capacity 75 HP semi hermetic screw type compressor engineered for water-cooled chillers, industrial process cooling, and commercial air conditioning skids. Designed specifically for low pressure ratio applications with an optimized built-in volume ratio, it delivers superior thermodynamic performance with eco-friendly R134a refrigerant.

Utilizing twin-screw rotor geometry, this semi hermetic screw type compressor delivers continuous, pulse-free gas discharge with minimal acoustic vibration in indoor mechanical rooms. Heavy-duty SKF or NSK rolling contact bearings and high-capacity axial thrust bearing assemblies absorb heavy mechanical stresses to prolong operating service intervals. Built-in internal safeguards include a fast-acting check valve to prevent rotor reverse rotation on power interruption, a fine-mesh oil filter, an internal safety relief valve, and an internal discharge muffler.

To match dynamic cooling loads in commercial facilities, the compressor incorporates a dual-solenoid 3-stage unloading mechanism (100% - 66% - 33%), preventing motor short-cycling and reducing part-load power consumption. Driven by a high-efficiency motor with embedded NTC thermistors for winding thermal overload protection, the unit supports both Star-Delta and Direct-On-Line starting across standard global voltage grids. With 2-5/8 in suction and 4-1/8 in discharge flanged ports, it enables straightforward integration into OEM chiller racks and replacement projects.