tender for procurement of various size butterfly valves with pneumatic actuator/hand wheel for dry fly ash vacuum line, flushing lines ,ct towers ,conveying discharge line etc. of ahp,1x500 mw, unit no. 5, sgtps, birsinghpur , bfv-100 nb with pneumatic actuator . as per tender schedule , bfv-150 nb with pneumatic actuator. as per tender schedule , bfv-200 nb with pneumatic actuator as per tender schedule , bfv-250 nb with pneumatic actuator as per tender schedule , bfv-300 nb with pneumatic actuator . as per tender schedule , bfv-300 nb with hand wheel operated . as per tender schedule , bfv-400 nb with pneumatic actuator. as per tender schedule