•  Full-bore design, effectively eliminate the pressure drop and eddy current, slow flow of solid particles in the valve.
•  Between bonnet & body and gate & seat are adopt metal to metal seal
•  Between gate and seat are adopt metal to metal seal, Surface spraying (heap) welding hard alloy , has good abrasion resistance, corrosion resistance.
•  Stem has back seal structure so as to replace seal ring of stem with pressure •  There is a seal grease injection valve on bonnet so as to repair seal grease and provided seal and lubricate performance of gate and seat