Forged steel fixed ball valve

pipelineball valvedesignThe fundamental concept is safety and reliability. Both long-distance pipelines and urban pipelines are energy supply lines and the lifeline of the national economy. The global underground oil and gas pipelines and networks, like the above ground transmission and distribution power grid, are the foundation for the survival of urban industry and civilian use. Without this energy supply line, modern urban functions would immediately cease. The harsh natural conditions of long-distance pipelines range from -70 ° C in the Arctic Circle to+70 ° C in the equatorial desert; Pipeline ball valves are subject to natural disasters such as earthquakes, foundation settlement, mudslides, landslides, floods, etc; Potential corrosion of groundwater and stress corrosion of sulfur-containing media are both triggering factors for accidents.

Kitamura pipelineball valveseriesWe strictly follow the relevant standards of the National Association of Corrosion Engineers (NACE) in terms of design, material selection, manufacturing, testing, surface treatment, and painting to meet the requirements of resistance to sulfide stress cracking in sulfurized environments based on user needs. The pipeline ball valve series not only has a wide selection of materials, but also uses surface nickel plating or 316 materials for internal components, and the sealing ring uses specially made polymer materials. Alloy steel valves are not only corrosion-resistant and sulfur resistant, but also have strong capabilities in fire prevention, static electricity prevention, and good sealing performance. They are suitable for a wide range of pressures and temperatures, with complete full and reduced diameters, and can be equipped with various driving devices. They are an ideal valve choice for chemical, petroleum refining, natural gas extraction, and transportation systems. The valve seat sealing pair can be made of hard alloy to ensure the valve's wear resistance, high temperature resistance, corrosion resistance, abrasion resistance, and long service life. It can also be made of polytetrafluoroethylene (PTFE) material to ensure zero leakage of the valve. The structure is simple, the volume is small, the weight is light, and it is easy to install and maintain. The 90 degree rotation can open and close quickly, and the action is light and flexible. The diameter of the sphere and valve body is equal to the diameter of the connecting pipe and forms a straight line, which reduces fluid flow resistance and saves energy, while also facilitating pipeline cleaning. The valve adopts a bottom mounted valve stem, which can effectively prevent the valve stem from popping out due to the increase of medium pressure. The valve is equipped with an anti-static structure to eliminate the static electricity generated by the friction between the non-metallic valve seat and the sphere, in order to prevent the generation of static sparks. This valve adopts dual sealing. When a fire occurs, if the non-metallic valve seat is burned, the medium will press the ball onto the metal sealing pair on the valve body to prevent a large amount of medium leakage. Various piping flange standards and flange sealing pair types can be adopted to meet various engineering needs. When the stagnant medium in the chamber of the pipeline ball valve experiences abnormal pressure rise due to temperature changes, the medium pressure pushes the valve seat away from the sphere, achieving automatic pressure relief. After pressure relief, the valve seat automatically resets. In addition to general sealing, the specially designed grease injection valve auxiliary sealing structure of the valve seat can provide emergency rescue in case of leakage due to seal ring damage. In the event of a fire or abnormal temperature rise that causes the valve seat sealing ring to burn or soften, the operation of pipeline ball valves is still reliable. At the same time, the valve seat forms a metal to metal contact with the sphere, achieving a temporary sealing effect and preventing the fire from further expanding, in compliance with API 6FA regulations. Unscrew the drainage device to check if there is any leakage in the valve seat, and also to discharge the trapped material in the middle chamber to reduce the pollution of the medium to the valve. When the valve is fully open or fully closed in working condition, the valve stem packing box can be replaced. The valve stem is sealed with PTFE packing and O-ring double sealing, which is particularly suitable for gas media. The valve stem movement part adopts high-quality SF self-lubricating bearings, which reduce the friction coefficient and decrease the operating torque.