The netherseal orbital ball valve is used as the outlet valve for molecular sieves
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As the title suggests, the pipe temperature ranges from 28 degrees to 280 degrees, and the pipe pressure is 1.6 Mpa. The valve fails to open fully even when it reaches 70% of its opening position; however, after disassembly for inspection, it was found that the valve stem indeed rubs against the roller, but the valve can still open and close smoothly. What could be the cause of this? Is it related to the medium and temperature?
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