INTRODUCTION
FKD-40A+41A is a screw compressor capacity controller widely used with various screw compressors such as KPC-Howdon, Alfa-Laval, Stal, Dunham Bush, APV- J & E Hall, KG Khosla, Sabroe, Cooling Systems CSI etc. FKD-40A moves capacity slide by operating loading/unloading solenoid valves. FKD-40A can be used either with RTD ( Pt100 / Pt1000 ) input or pressure transmitter input (4-20mA) FKD-41A is current limiter which allows to control motor current from 10% to 100% of rated current.