D43H flange butterfly valve products is an overview of the butterfly valve with the valve rod rotation circular disc plate for opening and closing parts, open or close the valve, butterfly valve is mainly for the use of block valves, can also be designed to have the function of regulating and truncation. Triple eccentric multi-level butterfly valve has no mechanical wear and tear, can reach zero leakage, suitable for petroleum, chemical industry, metallurgy, electric power, food, medicine, on different medium such as water supply and drainage, gas transmission pipeline as the adjusting and the best device to cutting fluid. D43H flange butterfly Industrial Valves structure 1 fluid resistance small, large diameter butterfly Industrial Valves fully open the effective area is larger. 2 open-close quickly, more effort, just when starting to turn 90 °, convenient and fast. 3 simple structure, smaller volume, lighter in weight. Triple eccentric butterfly valve is to point to: 4 axis of the stem and disc plate sealing surface offset a certain size, butterfly plate sealing surface and the body channel axis offset of a certain size, seat and rotary axis body form an eccentric Angle channel axis, therefore calls the triple eccentric. Butterfly valve from 0 ° - 90 ° open, butterfly valve sealing surface at the instant of the open immediately from the valve seat sealing surface, in its 90 ° - 0 ° is closed, only in the closing moments, the butterfly plate cone sealing surface will contact and compression seat conical sealing surface, so the seat and disc plate without any friction between the sealing surface of, in addition to the torque seal: the structure of the triple eccentric butterfly valve is closed, the seal main and deputy sealing pressure between the two sealing surface is produced by plus on the driving moment of the valve stem, not only eliminates the conventional resilient seated elastic material aging, cold flow, elastic failure factors such as sealing pressure reduce and disappear, and can be through with the change of the driving moment, realize the sealing pressure than any of the adjustment, so that the triple eccentric butterfly valve sealing performance improvement, the service life of the butterfly Industrial Valves is greatly improved. 6 soft hard cascading metal seal structure; Butterfly valve sealing ring by cascading stainless steel pieces of hard and soft and flexible graphite plate sealing surface, make it has the dual advantages of metal hard seal and elastic sealing, no matter under low temperature and high temperature conditions all has good sealing performance. 7 valve sealing surface: adopts hard alloy or stainless steel surfacing, makes the sealing surface with high intensity, good hardness, wear resistance. D43H flange butterfly valve installation and maintenance instructions 1, install the valve in advance clean up the valve cavity and seal face, there is no dirt clinging to the body and affect the sealing performance. When using regular cleaning the sealing surface and the screw filling lubricating oil. 2, manual device, hand wheel, screw does not allow for lifting. At the same time to clean up, clean up the valve cavity (3 Cleaning) Impurities to be installed by the pipe to prevent dirt chewed impurities sealing surface and affect the sealing performance. 4, in use should depend on control box or manual device to control the valve, with the aid of other auxiliary tools is not allowed. 5, and not to use this valve, should be stored in dry indoor, two terminal sizing block, arbitrary products are not allowed to pile up, in order to avoid damage on parts of the product.
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There are many advantages associated with .
resilient valve flow control valve with y gate valve are used extensively in cast iron valve.
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