How to choose the right electric ball valve


According to reports, in the next 10 years, China will have more than 20,000 km of oil pipelines to be built, including Russia, Kazakhstan and other transnational oil pipelines. In addition, following the "West-East gas transmission", China will have to build more than 20,000 kilometers of transnational gas pipelines and branch lines.


These projects require about 20,000 large-diameter pipeline ball valves and small-diameter ball valves, flat valves; will also build 10 to 20 million tons of large oil refineries, new, renovated and expanded a number of 800,000 ~ 1 million tons of large ethylene plant, has been approved and to be approved 500,000 ~ 600,000 tons / year large PTA plant also has a dozen sets, which will provide a huge market for the valve industry; large chemical fertilizer and ammonia The construction of large-scale fertilizer and ammonia plants will also provide opportunities for the valve manufacturing industry; in addition, direct coal liquefaction is likely to form a new industry, due to the coal direct liquefaction process medium working temperature, high pressure, high solid particle content, the valve has high requirements, will form an emerging market.


According to valve industry technicians, in the development of these new electric ball valve, should pay attention to the promotion and application of new technology, such as the development of long-distance pipeline large-diameter integral ball valve should be used as a whole welding technology; in order to improve the valve sealing surface corrosion resistance and erosion resistance, a few manufacturers have begun to use supersonic flame spraying tungsten carbide process, and should pay attention to the use of nanoscale materials for sealing surface coating modification, and laser melting process technology development.


In addition, over the years in the valve industry application of cobalt-chromium-tungsten plasma wire automatic overlay welding process should continue to promote to replace manual welding, to ensure the quality of the valve sealing surface; in order to achieve automatic control of the engineering device process, should strengthen the development of intelligent electric, hydraulic transmission device valves; accelerate the development of new transmission methods such as magnetic transmission, the development of new closed magnetic drive electric ball valve series, to eliminate the stem and The leakage point between the packing, so that it is suitable for flammable, explosive, toxic, corrosive media and the requirement to lock, avoid misoperation of the pipeline.


It is understood that China's large-scale ethylene plant equipment localization has reached 80%, ethylene supporting high-temperature and high-pressure valves under Sinopec has also achieved localization, good results, product quality and performance better than imported products. Sinopec localization office expressed great confidence in promoting the localization of valves, believe that the domestic backbone enterprises have the ability to undertake the project to tackle the task. After discussion, the representatives agreed that the 1500-lb electric ball valve can be localized, and the 2500-lb electric ball valve can also be partially localized.