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标题:Cast floating ball valve
正文:
CAST FLOATING BALL VALVES Size & Pressure : 150# DN25-DN250 / 300# DN25-DN250 / 600# DN25-DN100Summary : CAST FLOATING BALL VALVE including Bow-out proof stem, Key lock,Anti-fire safe design, Low torque in operation1.Bow-out proof stemFor the purpose of preventing the stem from flying off resulting in abnormal rising of the inner pressure of valve,shoulder is fixed at the lower part of the stem.In addition,in order to prevent leakage resulting from burnout of packing set of the stem in a fire,thrust bearing is set at the contact position of the shoulder at lower part of the stem and valve body.Thus an inverse seal seat is formed which will prevent leakage and avoid accident.2.Key lockLocks can be used to lock the manual valve when it is fully open or closed so as to prevent non-working personnel from pulling the handle which may result in misoperation of valve.It can also avoid opening or closing of valve resulting from the shock from pipelines or unpredictable facto
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