KI Series

Compact screw compressors with integrated liquid-cooled inverter

KI is the spearhead of the Palladio project and it worldwide represents the state of the art in the field of the screw technology with integrated inverter. Thanks to the use of a latest generation integrated inverter, entirely developed by RefPower and cooled with refrigerant, the KI series compressors offer the maximum flexibility of use with a power supply frequency between 30 and 70 Hz. The use of the inverter, unlike traditional capacity control systems, allows to keep the maximum compression efficiency over the entire range of the allowed use, from the minimum to the maximum compressor’s rotation speed. There are 6 available models with displacements between 578 and 1127 m3/h (70 Hz).


The mechanical characteristics of the KI series are the same of the KS series.
The specific characteristics of the KI series are listed below.

Optional Features

KI left side view

KI right side view

Models Code


Technical Data

The data shown in the table are referred to KI compressors with standard motor optimized for application with “low pressure” refrigerant fluids (e.g. R134a, motor size S). Other motors are also available for applications with “high pressure” refrigerant fluids and particular uses.

Dati tecnici QUBO
Dati tecnici QUBO

* Compressor equipped with motor size “S”, optimized for low pressure refrigerants (es. R134a, R513A, R1234ze). Power supply 400V/3/50Hz – 460V/3/60Hz

** Data refers to application with refrigerant R134a

General catalogue


Application manual


Selction software

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