... or stainless steel forging, sealed performance is good. 1,It is rising stem structure with balance stem.2, ... Valve and bonnet,gate and seat is metal to metal.3,Between stem ... replace packing stem.4,Metal to metal seal between gate and seat ,and the structure is weld overlay with ... resistance 5,Working pressure14-140MPa 6.Nom bore:1 13/16"-4 1/16" Plate gate valve