supply of air compressor cap-500 cfmair compressor cap-500 cfm,supply, installation, foundation work, erection and commisioning of rotary screw electric dri ven air compressor cap-500 cfm, 10 kg/cm2. detailed specification as per annexure-a. supplyitem descri ption: supply & commissioning of electric air compressor of neutral screw type including air dryer, capacit y 500 cfm, working pressure-08-10 kg/ sq.cm, 3-phase, 415 v, with warranty/guarantee and test certificat e. required technical specification: 1. type of drive: gear drive, 2) type of prime mover: tefc (totally encl osed fan - cooled) 3) cooling system: air cooled 4) max pressure : 9-10 kg/sq.cm, 5) electric motor capacit y: 100 hp (min) 6) inter cooler / after cooler: finned & tube type of fin material- aluminium 7) no. of phas es: 3 phase with neutral 8) discharge air purity in respect of humidity, liquid water & solid particles: class- 1 as per iso 8573-1 9) compressor - isi marked to is: 5456. [ warranty period: 30 months after the date of delivery ] ]