Recently, the project of the national 863 project "Complete set of key technologies for complete industrialization of back-crystalline silicon cells and demonstration production lines with an efficiency of over 21%" participated by Linuo PV passed the acceptance of the Ministry of Science and Technology.
Linuo PV is mainly responsible for the task of the sub-task, namely: "21%MWB-HIT battery technology." As the first national 863 project of Linuo Photovoltaic, during the implementation of the project task, Linuo Photovoltaics senior executives, R&D and financial staff made concerted efforts to jointly achieve the achievement of the research and development of various indicators for the technical acceptance of the project. The foundation for success has been laid.
At the acceptance meeting of the project, the leaders of the Ministry of Science and Technology affirmed the results of the research on the tasks and expectations of the large-scale industrialization of the research and technological achievements. The acceptance panel heard the acceptance report, reviewed the acceptance materials, visited the full back electrode battery pilot line and related video data, and determined that the project completed the technical research and development tasks specified in the mission statement, met the assessment targets, and agreed to pass the acceptance.
There are five general body styles of ball Valves: single body, three-piece body, split body, top entry, and welded. The difference is based on how the pieces of the valve-especially the casing that contains the ball itself-are manufactured and assembled. The valve operation is the same in each case.
In addition, there are different styles related to the bore of the ball mechanism itself.
Ball valves in sizes up to 2 inch generally come in single piece, two or three piece designs. One piece ball valves are almost always reduced bore, are relatively inexpensive and generally are throw-away. Two piece ball valves are generally slightly reduced (or standard) bore, they can be either throw-away or repairable. The 3 piece design allows for the center part of the valve containing the ball, stem & seats to be easily removed from the pipeline. This facilitates efficient cleaning of deposited sediments, replacement of seats and gland packings, polishing out of small scratches on the ball, all this without removing the pipes from the valve body. The design concept of a three piece valve is for it to be repairable.
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