bids are invited for procurement of knife edge gate valve knife edge gate valve unidirectional cylinder operated size 250 nb , knife edge gate valve unidirectional cylinder operated size 200 nb , bi directional valve abrasive ash slurry 250mm , bi-direction knife gate valve wafer cast body 200mm , knife edge gate valve unidirectional cylinder operated size 300 nb valve , complete set of valve, pneumatic, size 300 nb, model fig 752 , with valve bidirectional , bi-direction knife gate valve size 300mm mid flengh 2 pc split body design ptff direct monnted , bidirectional valvebottom ash hopper area operation pneumatic, 200mm , knife edge gate valve unidirectional cylinder operated size 350 nb valve body , knife edge gate valve bidirectional hand operated size 350 nb valve total quantity : 63