The stainless steel ball valve in the pipeline is mainly used to cut cut-off, distribute, and change the flow direction of the medium. It only needs to use the operation of 90 ° rotation and a very small turning torque to close tightly. The ball valve is suitable for use as a switch and a cut-off valve.
Since the ball valve usually uses rubber, nylon, and PTFE as the seat seal material, its use temperature is limited by the seat seal material. The ball valve shut-off role relies on the metal ball in the role of the media, the plastic seat between the mutual pressure to complete (floating ball valve). Seat seal under the action of the contact pressure, the local area of elastic-plastic deformation. This deformation can compensate for the manufacturing accuracy and surface roughness of the ball, to ensure the sealing performance of the ball valve.
Stainless steel ball valves are installed in a variety of ways, such as clamping, flange, threaded, and welded. According to the use of different environments and minds, you can choose the valve connection method.
Stainless steel ball valve welding cracks are caused by what?
1. This is due to the welding current being too high. Or did not choose argon arc welding, so that the stainless steel at higher temperatures changes the intergranular density cracks;
2. The valve body itself is a material problem, the valve body is due to the high carbon content. When welding, because of the high hardness, a high temperature is required the stainless steel.
So choose stainless steel ball valves to avoid cracks or quality problems. You should choose a manufacturer with integrity, who shall meet the national standard 304 material. And to bring the material quality certificate.
