API Standard Titanium B381 Gr.F-2 1500LB 3-PC Forged Steel Trunnion Mounted Metal Seated Ball Valve

Compared to soft sealed ball valves, metal to metal seated ball valves not only have the characteristics of low fluid resistance, quick and convenient opening and closing, good sealing performance, long service life, high reliability, and easy installation with electric and pneumatic devices, but also can adapt to a wider range of temperature and fluid medium fields. Therefore, they are widely used in pipeline transportation. The ball and seat of a hard sealed ball valve are both made of metal materials, and a sealing pair composed of metal and metal materials is commonly referred to as a hard seal. The design specifications for hard sealed ball valves shall comply with API 6D. Mainly composed of valve body, valve seat, sphere, valve stem, and driving device.

There are generally two types of structural designs for hard sealed wear-resistant ball valves: ball floating type and ball fixed type. Regardless of the type of structure, in the medium used under harsh wear conditions, it is necessary to prevent the accumulation of spring chamber materials at the elastic valve seat from causing the valve to malfunction, resulting in abnormal torque increase or "jamming" of the valve. For this working condition, the manufacturer has developed self-cleaning wear-resistant ball valves (floating type) and damping sedimentation structure wear-resistant ball valves (fixed type), which effectively solve this problem.


Metal hard sealed ball valves have the characteristic of self-cleaning. The upstream floating valve seat is designed as a self-cleaning channel structure with a blowing function. During the opening and closing process, the valve can rely on the pressure of the medium itself to blow and sweep the materials accumulated in the spring and valve chamber, in order to prevent solid particles from accumulating in the spring chamber and potentially causing "lock up" phenomenon, which affects the normal operation of the valve; The sealing valve seat is a replaceable structure; Add two self-lubricating bearing pads at the valve stem to reduce valve operating torque.


The elastic valve seat of the metal hard sealed ball valve adopts a "guiding" structure design, and the damping sedimentation tank is designed in front to ensure that the valve can effectively deposit materials in front of the spring chamber during use, without affecting the normal retreat of the valve seat.