GEA Grasso screw compressor MC series

They have a simple and compact design between the compressor and package, where some unit components may come already integrated such as a suction side non-return valve, suction filter, an oil pump along with an oil and hydraulic system with the appropriate solenoid valve assemblies for Vi and part load adjustment.
The control lines for the solenoid valve for Vi part load controls are connected directly to the compressor.