PRESSURE-TEMPERATURE RATING

The following table indicates rated values of temperature and pressure for main materials of valves. These valves are determined according to American standard ASME/ANSI B16.34

TEMP MAX. WORKING PRESSURE
150Lb 300Lb 400Lb 600Lb 900Lb 1500Lb
°F °C WCB,LCB CF8M WCB,LCB CF8M WCB,LCB CF8M WCB,LCB CF8M WCB,LCB CF8M WCB,LCB CF8M
Up to Up to bar bar bar bar bar bar bar bar bar bar bar bar
100 38 19.7 19 51 49.6 68.3 66.2 102 99.3 153.1 148.9 255.5 248.2
200 93 17.9 16.5 46.5 42.7 62.1 56.9 93.1 85.5 139.6 128.2 232.7 213.4
300 149 15.9 14.8 45.2 38.6 60.3 51.4 90.7 77.2 135.8 115.8 226.1 192.7
400 204 13.8 13.4 43.8 35.5 58.3 47.2 87.6 71 131 106.2 218.6 177.2
500 264 11.7 11.7 41.4 33.1 55.2 43.8 82.7 65.8 123.8 98.9 206.5 164.8

The CVI soft seated trunnion mounted ball valve P-T rating is not only related to the body material, but also related 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 on different valve working conditions, the following P-T rating value is calculated out by stable valve working condition.

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

 

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