supply of skid based air package system design, engineering, manufacturing, procurement of materials and bought out components, assembly at shop, inspection including inspection by tpia, testing at manufacturers works, packing, supply of skid based air package system , design and supply of skid based air package system consisting of the following as minimum . i) oil free dry type screw air compressors with motor : (qty 2 (1working +1 stand by). ii) plant air receiver : 1 qty. iii) instrument air dryers : qty 2 (1working +1 stand by). iv) instrument air receiver : 1 qty v) all interconnecting piping ,valves, instruments ,cables, cable tray etc. with micro based controller : lot. refer as per annexure ii of jss (214227c-45-jss-4119-0001), process datasheet(214227c-45-pds-4100-0802) & other specifications attached with mr for detailed scope of supply.