Full Description

MSS SP-143-2018 establishes the minimum requirements for the application, design and installation oflive-loaded stem packing systems for valves designed in accordance with ASME B16.34, having risingand/or rotating stems. It applies to valves with flexible graphite, polytetrafluoroethylene (PTFE), expandedpolytetrafluoroethylene (ePTFE), or other packing stem seal material, regardless of frequency of operation.

This Standard Practice does not apply to valves that include a lantern ring(s) as part of its packing system or to self-energized packing.

Product Details

Published: 2018 ANSI: ANSI Approved Number of Pages: 18 File Size: 1 file , 870 KB Redline File Size: 2 files , 4.6 MB