tender for supply of various control d ers of ball tube mill bbd4772 for unit#1 to 4, ctpp, chhabra , hot air to mill control damper louver type without dbl.acting pn. cylinder 1300x1200 size with 3 blades lh , hot air to mill control damper louver type without dbl.acting pn. cylinder 1300x1200 size with 3 blades rh , seal air fan damper/650 nb flanged butterfly damper for 100% air tight, body- carbon steel is2062 gr.b, flap- is 2062, seal epdm rubber, shaft-en8, bearing bush- gun metal , bypass air damper/900nb butterfly damper with hand lever, body-carbon steel is2062 gr.b, shaft- en24 for both drive and non drive ends, drive bush gun metal , cold air damper(size 1000mm x1000mm, with three flaps louver type for circular duct (dia. 1000 mm) arrangement with ss sealing without actuator, body-carbon steel is2062 gr.b, frame ;- 500mm ismc channel, flape; is2062 aero blade, bulb seal-ss316 fitted in the flap, jam seal- en42j shaft-en8, bearing bush- gun metal,sealing-100% close air tightening