Subject: trunnion-mounted ball valve http://www.multitran.ru/c/m.exe?a=33&s=Trunnion-Mounted%20Ball%20Valves&l1=1&l2=2&FFT=1контекст Trunnion ball valves shall have welded steel bodies with spherical center section without bolted bonnet joints. The valves shall have full ports. A block and bleed connection shall be mounted in the valve body. The spherical member shall close in a quarter turn and shall be supported by the stem. Top and bottom trunnion bearings shall absorb thrust due to line pressure.
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