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An optional fugitive emissions module is available for Tufline ball valves.
The module features the same spherical S2 seal as the ball valve itself; its standard design meets the requirements of ASME B16.34 CL150.
The module has a double set of belleville washers that live load the stem packing and the S2 spherical seal. This helps to assure positive sealing in high cycle severe service applications. A PTFE chevron stem packing provides a secondary dynamic stem seal.
A stainless steel powder-filled PTFE bushing supports the module's blowout-proof stem, extending the life of all stem sealing components and providing additional support for the …