supply of laboratory and scientific equipment as per tender document , repair of thermal evaporator system , qsv 4’’ butterfly valve(details as per sl no 1 at annexure-a). , qsv 1” butterfly valve(details as per sl no 2 at annexure-a). , variac : requiredfor controlling (increasing & decreasing) the voltage of the power from lt & ht transformer(details as per sl no 3 at annexure-a). , ht board : required for operatingthe discharge current for ion cleaning of the substrate by ion bombardment gadget. (details as per sl no 4 at annexure-a). , replacement of o rings : set of neoprene o rings required for the valves, chamber gadgetry, kf clamps, dp, lnt & collar.(details as per sl no 5 at annexure-a). , needle valve : manually operated fine control needle valve provided for controlled admittance for inert gas into the chamber(details as per sl no 6 at annexure-a). , quartz tube adopter : ss adopter for fixing on both sides of the quartz tube with provision for fixing valve, pressure gauges and pipeline to vacuum pump.(details as per sl no 7 at annexure-a. , ½” to pu 10 ball valve(details as per sl no 8 at annexure-a). , servicing of rotary pump(details as per sl no 9 at annexure-a). , servicing of pirani and penning gauges.(details as per sl no 10 at annexure-a). , servicing charges of the coating unit(details as per sl no 11 at annexure-a).