bids are invited for custom bid for services -complete overhauling. includes dismantling, replac ing spareparts, assembling, contact skin machining of seawelding and machining of control valve body ( cs/a stm a216 gr wcb) welding n machining of control valve body (ms)welding n machining of control valve body (ms)welding and machining of control valve body ( cs/astm a216 gr wcb)supply of seat ring (single of ss316) supply of seatring (single of ss316)supply of seatring (single of ss316)supply of seat ring (single of ss316) supply of plug stem and seatring (single seat top guided of ss316) supply of plu stem n steam ring(single seat top guided of ss316)supply of plu stem n steam ring(single seat top guided of ss316)supply of plug stem and seatring (single seat top guided of ss316) supply of plug stem and seat ring (double seat top guided of ss316) supply of plug stem n seatring (double seat top guided of ss316)supply of plug stem n seatring (double seat top guided of ss316)supply of plug stem and seat ring (double seat top guided of ss316) overhauling, mounting of valve positioner and cali bration overhauling, mounting of valve positioner n calibrationoverhauling, mounting of valve positioner n calibrationoverhauling, mounting of valve positioner and calibration