renewal and replacement of 3 no unit air compressors renewal and replacement of 3 no unit air compressors , electrical items : , base mounted reciprocating type air compressors having minimum free air delivery ( fad ) of 30.88 cfm, nominal working pressure 50 kg / cm2 with suitable motor having complete v-sheave, dol starter, air filter, base plate, slide rails, v-belt, pressure gauge, service valve, drain cock, safety valve, motor pulley, belt guard & auto start stop regulation fitted on base plate, cooling system, moisture trap, complete with accessories as per section-ii technical specification and scope of supply at ubdc project malikpur, pathankot. note : installation shall be carried out by the pspcl. however commissioning shall be carried out by the firms representativefree of cost.