procurement of 300 nb bidirectional pneumatic operated knife gate valve bare shaft and 450 nb bidirectional knife gate valve bare shaft for ahpmm, stg ii,sgtpp. , procurement of 300 nb bi-directional pneumatic operated knife gate valvebare shaft and450 nb bidirectional knife gate valve bare shaftfor ahpmm stgii sgtpp , 300nb bi-directional knife gate valve ( single piece body, bare shaft valve without actuator. size 300nb (12) * end connection:wafer end / drilling strandered:ansi b 16.5, class #150* real working pressure:10 bar.* body:carbon steel a 216 gr wcb. * gate:aisi 304 nitrided. * seat:epdm - wear ring( cf8+nitrided). * gland packing:st ptfe impregnated synthetic fibre with epdm o ring. * gland follower:wcb / actuator bare shaft as per attached drawing )*kgv retrofittable with existing pneumatic power cylinder*kgv containing striker for existing contact/roller type limit switch with fitment arrangement for the limit switches. , knife gate valve - 450nb(18) for ash slurry disposal line mss sp-81 ;ansi b 16.5, class :150 ; for ash slurry disposal line. ( manual gear operated, mss-sp-81, ansi b16.5 class 150 (metric hole) body: astm a216 gr. wcb + nitrided (600 hv) gate: astm a240 gr. ss316 + nitrided (600 hv) seat: viton (ss316 reinforced) as per attached drawing ).*kgv retrofittable with existing pneumatic power cylinder*kgv containing striker for existing contact/roller type limit switch with fitment arrangement for the limit switches.