The provided Refrigerant Charging Unit comprises of a Rotational two phase vacuum engine and pump with anti-sub back. It additionally has manifold valves, gauges and equipped for dismantling vacuum of over 50 microns of Hg and alongside arrangement of connection with a microns degree vacuum gauge. This additionally has charging cylinder with facility of temperature redress and all essential disconnecting valves. Our Refrigerant Charging Unit comprises of a supporter pump, mass stream meter, regulation board and a gun. This is intended to fill the operations ceaselessly with refrigerant that is provided as pressurized fluid. It incorporates single or numerous refrigerants, notwithstanding joining HFO, HCFC and Hydrocarbon refrigerants.