The YSF Series is a semi-hermetic, field-serviceable scroll compressor line purpose-built for low-temperature refrigeration duty — blast freezing, frozen storage, and other applications requiring deep evaporating temperatures beyond what a medium-temperature platform can sustain. The series is offered in two enhanced-capacity configurations: liquid injection (-Q100) and vapor injection (-V100), both of which manage discharge gas temperature to extend the compressor's safe operating range at low suction pressure.

Design Features

• Every component, from the scroll set to the overall housing, is purpose-designed for low-temperature refrigeration duty
• Dual (radial and axial) compliance scroll design with an optimized axial floating seal for higher efficiency
• Precise discharge temperature control for a wide operating envelope at low evaporating temperatures
• Calculated load and sealing force for lower operating noise
• High-efficiency motor design suited to low-temperature refrigeration duty cycles
• Integrated vapor injection technology (-V100 models) sub-cools the compression cycle mid-stream, extending the operating envelope down to -40°C evaporating temperature without external supplemental cooling
• Liquid injection technology (-Q100 models) uses controlled liquid refrigerant injection to manage discharge temperature at high compression ratios
• Semi-hermetic, field-serviceable construction for on-site maintenance
• Copper-plated steel suction and discharge fittings for corrosion resistance

Model Naming Convention

Using YSF125E1G-V100 as an example: YSF = product series (low-temperature refrigeration duty, semi-hermetic); 125 = nominal capacity code at 50Hz rated conditions (×100W); E = refrigerant code (E = R404A); 1 = voltage/frequency code (3-phase, 380–420V/50Hz); G = configuration code (with sight glass, brazed fittings); V = vapor injection (Q = liquid injection); trailing digits = engineering revision code.

① Liquid Injection Models (-Q100)

② Vapor Injection Models (-V100)

Application Notes

Rated conditions above: 3-phase 380–420V/50Hz supply. Vapor injection (-V100) models are the recommended choice for the deepest evaporating temperatures (down to -40°C); liquid injection (-Q100) models suit slightly less extreme low-temperature applications where discharge temperature control via liquid injection is preferred. Fields marked "to be confirmed" were not available in publicly disclosed data at time of writing — please verify capacity and power input figures against Invotech's official datasheet before finalizing these listings.