Stainless steel methane cryogenic ball valves provided by the 海佩林 I. Product Overview: ???? cryogenic valve opening and closing parts of the ball, move the ball by the stem stocks around the axis of the stem 90 ° rotation movement of the valve, low ball into Floating and fixed categories, goods suitable for flammable and explosive, strong penetration of ethylene, liquid oxygen, liquid hydrogen, natural gas, liquefied petroleum gas, oil and other media as truncated or connected application. When the medium temperature is below -60 ℃ may be lengthened in the neck, usually lengthened 250mm, or according to the actual conditions demand lengthened. Palin cryogenic valve maximum temperature did do -196 ℃, through the range of materials suitable for the cooling process after: LCB = -60 ℃, LC3 = -120 ℃, CF8 = -196 ℃. Second, product characteristics: 1, the selection of the decompression hole opened in the valve structure. 2, the spacer is the use of having a stable sealing rich ceramic filler material. 3, light body, standard small. In order to reduce heat valve lost, particularly to ensure that the use of ultra-low temperature valve, deliberately planned as light weight, standard small body. 4, the long axis of the valve has a low temperature fluid flows through the valve, the stem length selection method, it is possible to avoid the effects of external heat so that the lid adhere to room temperature, to prevent the cover seal function is lowered. This length is the optimum length through accounting, test and obtained. Third, the technical parameters nominal diameter DN10-600mm nominal PN4.0MPa For media oxygen, liquid nitrogen, liquid argon, liquefied natural gas, liquid carbon dioxide, liquid propane and other applicable temperature -196 ℃ ~ + 80 ℃ Fourth, the main part parameters: the valve stem 0Cr18Ni9 0Cr18Ni9 0Cr18Ni9 sphere packing, PTFE seals