Ball valve seal with dynamic C-seal and static C-seal

摘要

A seal assembly is provided for a rotary ball valve having a top-mounted bonnet (14), thereby allowing the seal assembly to be installed and removed without removing the valve from the pipeline. In an embodiment, the seal assembly may include a seal ring (44) disposed within the valve interior and biased toward the ball element of the valve. A seal carrier (46) may be disposed between the seal ring and the valve body, and the seal carrier may be removably secured to the valve body by a plurality of bolts disposed in the valve interior. A primary leak path (50) may exist between the seal ring and the seal carrier and a secondary leak path (52) may exist between the seal carrier and the valve body. A first and second auxiliary seal (82,56) may prevent fluid flow through the primary and secondary leak path, respectively. Figure 2 38a 136 40a 0102 1 0 1 0 134 140 104 130 11 - 48 38b- 4 9 114 --- 128 56- 8 8 132 150 101 6 140 46 80 - 146 12 78-- -66 -44 148 5 152 8654/758 6 18 + 61 30 22-