Product details
PQ double eccentric half ball valve is a domestic innovative product developed by digesting and absorbing the domestic and foreign advanced technologies, implementing successful research and development and borrowing German similar products.' The structure is in accordance with the theory of eccentric tightening; it aims to attain the objective of tightening,adjusting and closing through transmission structure; the core technology is taking a domestic leading position. .
The successful development has provided reliable control valve for the dificulty of affecting solution process flow in the chemical engineering, petroleum, gas, metallurgical and power departments due to sedimentation scaling and crystal separation and offered new and extraordinary products for China to upgrade the equipment level of industrial pipe. It is featured as unique design and stylish structure. First, the double eccentric structure valve is concealed in the valve cavity once opening; it is featured as large circulation section, no valve flushing or flowing blockage. Once it is closed, the valve core is not flushed; the sphere of valve core steps forward along the valve seat; given shearing function, it can effectively cut off the scale obstacle and realize reliable sealing. It is highly effective to the separation and transportation of easily scaling solid medium. Secondly, The half ball of valve is in the double metal structure; different alloy materials are stacked and welded in the sphere; the valve seat is also stacked and welded and has to undergo a special treatment process.
The sealing surface is adopted to form the anti-corrosive, wear resistant and high temperature resistant structures and thus meet various demands. Thirdly, the sealing is tight; during the transportation of hazardous gas, it can guarantee no leakage. Fourthly, the compensation margin is reserved for the valve seat and sphere; upon abrasion of valve seat, it is rotated a ltle upon closing: therefore, it can be reliably sealed and use life is lengthened. Besides, the valve seat can still .be adopted upon user's unfastening, adjusting or replacing the compressive screw. Therefore, it can avoid the defect of wastage in the whole machine due to sealing invalidation of numerous valves.
Different aloy materials are stacked and welded according to the user's actual demand; the double metal seal ring is adopted for different industrial departments with wear resistance, corrosion resistance, high temperature resistance and strict sealing requirements.
