The first ,fixed stainless steel floating ball valve and stainless steel ball valves are one of the stainless steel ball valve, stainless steel floating ball valve model is Q41F Q11F or Q61F, etc., stainless steel fixed ball valve model is generally Q47 or Q367F, etc., stainless steel floating ball valve under the general applicable to DN200 caliber, and the engineering stress is less than PN64, fixed and stainless steel ball valve usually applies to diameter greater than DN200, but not limited nominal pressure, stainless steel fixed ball valve ball is fixed, the above is a sphere with a fixed stem, below also have fixed on a fixed axis, two weeks and fixed up and down because of the, so even if the pipe pressure again big, the ball will not move, so is suitable for high pressure large diameter ball valve, as for the floating ball valve, it is only a sphere above the stem set above, when the stem 90 ° rotation, only used to drive the ball spinning effect, so as to open and close the valve, so when the pipeline pressure, the ball feel as imports pressure, pushed to export direction, the ball will be under the action of pressure, close to the outlet valve seat ball valve seat is time, PTFE, of course, is to belong to soft seal, and in the case of low pressure, also can achieve two-way sealed stainless steel floating ball valve, but all the stainless steel fixed ball valve must ensure that the two-way sealed, so that's why the dosage of the stainless steel ball valve in the market, because it is the classification of the lot, according to different environment can choose different types of ball valve.
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