supply of gate valve, cast carbon steel, 50.8 mm (2), ansi 150 class, manufactured as per api standard 600, regular bore type, rising stem, bolted bonnet, outside yoke, integrally cast flexible wedge gate, end flange having serrated raised face drilled in accordance with ansi b 16.5 , face to face dimension as per ansi b 16.10 and tested as per api standard 598, complete with companion flange in both sides and requisite nos. of studs and nuts
