Cast iron ball valve used in working temperature ≤150 ℃ of water, steam and other non-corrosive media pipeline, for opening and closing with; its biggest advantage for quick opening and closing. In addition, what are the advantages of it? Xiao Bian today introduced you to the advantages of cast iron ball valve, as follows:
1, the fluid resistance is small, the whole diameter of the ball valve basically no flow resistance.
2, simple structure, small size, light weight.
3, close and reliable. It has two sealing surfaces, and the ball valve sealing surface material widely used in a variety of plastic, good sealing, can achieve a complete seal. In the vacuum system has also been widely used.
4, easy to operate, quickly open and close, as long as the full turn to 90 degrees off, easy to remote control.
5, easy maintenance, ball valve structure is simple, the seals are generally active, demolition and replacement are more convenient.
6, fully open or fully closed, the sealing surface of the ball and the valve seat and media isolation, media will not cause erosion of the ball valve sealing surface.
7, a wide range of applications, the path from small to a few millimeters, up to a few meters, from high vacuum to high pressure can be applied.
8, the ball valve in the process of opening and closing wipe, it can be used for medium with suspended solids.
High temperature alloy is divided into three kinds of material: 760 ℃ high-temperature material, 1200℃ high temperature and 1500 ℃ high temperature materials, the tensile strength is 800 mpa. On other words,it refers to the metal material worked well in the condition of 760-1500 ℃ or above. It owns excellent high temperature strength, good resistance to oxidation and thermal corrosion resistance, good fatigue properties, fracture toughness and other comprehensive performance, this kind of material has became an irreplaceable key material in military and civilian gas turbine engine hot end components . According to the relevant theory, 760 ℃ high-temperature materials, according to the matrix elements,can be mainly divided into high temperature iron base alloy, nickel base superalloy and cobalt-based super alloy. According to the preparation process,it can be divided into deformation and high temperature alloy, casting high temperature alloy and powder metallurgy super alloy. According to the solid methods,it can be divided into solid solution strengthening, precipitation strengthening and oxide dispersion strengthened with fiber reinforced type, etc.
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