procurement and replacement of air cells along with complete set of gasket of conservator tank for bhel make power transformer installed at 210mw in unit no. 3and4 at sgtps, birsinghpur , supply part:-procurement of air cells along with complete set of gasket of conservator tankfor bhel make power transformer installed at 210mw in u#3&4 , air cell with gaskets /o-rings for 250 mva, 15.75/220 kv generating transformer (sl.no. 2011271,2011272 manufacturing year 1998) , set of gasket for conservator tank of250 mva, 15.75/220 kv generating transformer (sl.no. 2011271,2011272 manufacturing year 1998) , air cell with gaskets /o-rings for 16 mva 15.75/6.6kv uat transformer (sl.no. 2011260, 2011261, 2011262, 2011263 manufacturing year 1998) , set of gasket for conservator tank of16 mva 15.75/6.6kv uat transformer (sl.no. 2011260, 2011261, 2011262, 2011263 manufacturing year 1998) , workpart :-replacement of air cells along with complete set of gasket of conservator tankfor bhel make power transformer installed at 210mw in u#3&4 , charge for deputation of service engineer for supervision of replacement of complete gasket set for conservator tank along with air cells of gt 3gx, uat 3x1, uat 3x2 for bhel make power transformer installed at 210mw in u#3 , charge for deputation of service engineer for supervision ofreplacement of complete gasket set for conservator tank along with air cells of gt 4gx, uat 4x1, uat 4x2 for bhel make power transformer installed at 210mw in u#4 , charges for journey days of service engineer to & fro for u#3&4