bids are invited for custom bid for services - repair and overhauling of ac ref and stpsystem valves repair and overhauling service repair, maintenance and installation of plant/ systems/equipments rectification of engineering defects: icgs vijaya e-297 suction valve of stbd ref. condenser pump is not holding (size: 40 nb, type: ball valve). valve to be overhauled/ renewed and proved for satisfactory operation. inway job includes pressure testing upto 05 bar, removal and refitment of the valve. e-298 discharge valve of stbd ac condenser pump not holding (size: 150 nb, type: sdnr). valve to be repaired/ overhauled and proved for satisfactory operation. inway job includes pressure testing upto 05 bar, removal and refitment of the valve. e-302 back flush valve of stp system is not holding (size: 50 nb, type: gate valve). valve to be repaired/ overhauled and proved for satisfactory operation. inway job includes pressure testing upto 05 bar, removal and refitment of the valve. total quantity :