High-performance semi-hermetic screw compressor engineered for demanding low-temperature commercial and industrial freezing applications.

• Low-Temperature Freezing Twin-Screw Design & Economizer Circuit: Optimized for performance with R22, R404A, and R507 refrigerants, this high-capacity 75 HP unit delivers a displacement of 186 CFM (312 m³/h) at 60Hz and 155 CFM (258 m³/h) at 50Hz. Built with patented twin-screw rotor profiles, it minimizes internal gas leakage clearances under high pressure ratios. An integrated economizer circuit featuring a 1-3/8 in. interface provides subcooling capability to increase refrigeration output and overall COP during deep-freeze duty cycles.
• Stepless 25%-100% Capacity Modulation: To maintain stable evaporating pressures and match fluctuating system loads, the compressor utilizes a dual solenoid valve mechanism for smooth, stepless capacity modulation from 25% to 100%. Integrated partial-load volume ratio (Vi) optimization prevents over-compression and under-compression losses, drastically cutting energy consumption during off-peak operations.
• Heavy-Duty Mechanical Engineering & Built-in Safeguards: Engineered for continuous service without requiring an external oil pump, this semi hermetic screw compressor relies on high-load SKF or NSK rolling bearings combined with a specialized axial thrust bearing structure.

• Internal Check Valve: Prevents reverse rotor rotation caused by pressure equalization during shutdown.
• Safety Relief Valve: Protects internal housing against abnormal pressure spikes.
• External Oil Filter: Allows quick inspection and rapid replacement during scheduled routine maintenance.
• Motor Thermal Protection: Integrated NTC thermistor sensors continuously monitor motor winding temperatures.

Every 06TSR186 semi hermetic screw compressor undergoes 100% factory operational run testing and a 33-point quality process inspection prior to shipment. The high-strength motor supports Star-Delta and Direct-On-Line (DOL) starting across standard commercial voltage supplies (200V-460V at 50Hz/60Hz).

• Standard Accessories: Junction Box, Oil System Assembly, Motor Protection Module, Capacity Control Valve, Service Stop Values.
• Optional Accessories: Oil Separator, Mounting Flanges, Economizer Kit, Oil Cooler, High-Temperature Expansion Valve, Kriwan Protection Module, and Paragon Control Board.

Ruifujie is a modern, large-scale refrigeration enterprise with over 20 years of industry experience. We specialize in supplying screw compressors, semi-hermetic compressors, scroll compressors, reciprocating compressors, and rotary compressors, as well as cold storage equipment, quick-freezing equipment, and ice-making machinery.

Supporting full OEM and ODM customization services, Ruifujie serves commercial clients across the United States, Russia, the United Arab Emirates, Saudi Arabia, the United Kingdom, and global markets. Backed by solid technical strength and cost-effective product solutions, we establish reliable, long-term partnerships with commercial and industrial B2B buyers worldwide.

Ruifujie provides rapid technical evaluations and competitive factory-direct commercial quotes for B2B cooling equipment buyers worldwide. Submit your project requirements today, and our technical team will deliver a customized proposal within 8 hours.

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