supply of supply , installation, testing & commissioning of tank mounted air cooled electric driven oil lubricatedsupply , installation, testing & commissioning of tank mounted air cooled electric driven oil lubricated,supply , installation, testing & commissioning of tank mounted air cooled elect ric driven oil lubricated silenced screw compressor with suitable refrigerated air dryer & its accessories, safety devices, power & control panel etc.with following specification- 1) normal working pressure - 10-12 kg/cm2 2) max pressure-11-12 kg/cm2 3) max humidity-95% 5) cooling system -air cooled 6) free air delivery - 50-100 cfm 7) tank capacity- 250-500 liters 8) 415 volt , 50 hz , 3 phase induction motor- rating-15-25 hp ,ie-2,duty-s1, tefc, ip-55, insulation class-f, 9) drive type-gear drive 10) discharge air purity in respect of humidity, liquid water & solid particle-class 1 as [per is 8573-1] 11) noise level