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Pressure - Temperature Rating of Trunnion Mounted Ball Valve

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Pressure - Temperature Rating of Trunnion Mounted Ball Valve
The P-T rating is not only relating to the body material, but more relating to the material of seat, packing and gasket. Sealing material is made of macromolecule, asbestos or rubber. And the selection of sealing material is depended upon the medium of the valve, valve working temperature, pressure and velocity of flow.
As the P-T rating is varied according to different valve working condition, the following P-T rating value is calculated out by stable valve working condition.

Note:
The valve body material in the above sheet is WCB. For other P-T rating of different body material, please refer to ASME B16.34 (lasted edition)


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