Compressor Suitable For M/S. Daulatram / Intec/ Sidwal/Kk Iron/ Subros Make Roof Mounted Air Conditioning System Of Wag9Hc Locomotives And R407C Refrigerant Gas Confirming To Rdso Specification No. Rdso/2007/El/Spec/0055 Rev 02 Or Latest As Per Emerson Copeland Model No.: Zr28K3E-Tfd-522 Or Its Fully Equivalent.