Pressure seal bonnet valves are designed and manufactured to ensure the perfect seal, as well as to allow for easy dismounting and assembly. As line pressure increases, seating forces also increase to assure its performance in high temperature and pressure application The body of the high pressure gate valve is designed as an one piece casting, with smooth inside contour providing maximum flow efficiency. The body has an integral casting guiding system to guide the wedge full through the valve stroke. The pressure seal type gate valve is designed with 4holes in the neck at the region of the segmental retainer for a proper disassembly. The contacting surface the pressure seal gasket outside has a stainless steel 18-8 inlay to assure soundness and corrosion the body is seal welding for body seat rings.