tender for procurement of critical spares of hora make bfp recirculation valves for up gradation of existing recirculation valves from on/off design to modulating design in accordance to the implementation of flexible operation by m/s bhel according to cea guidelines installed in unit-1 at 2x600 mw, sstpp, mppgcl, dongalia (as per tender schedule) , complete modification set from on/off valve-type 68 to modulating-valve-type 86 consists of: modified seat with cage system modified control unit modified inlet cage with seat surface sealing plate required gaskets set sipart ps2 positioner 6dr 5010-0n600- 0aa0 including tubing for quick opening and quick closing signal: 2x solenoid valve g1/4 2x pneumatic valve univer g1 booster sti av - npt 1/4 according to sp-385260 make: hora-germany