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MSS SP-143-2012

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Live-Loaded Valve Stem Packing Systems
STANDARD published 03/01/2012 by Manufacturers Standardization Society

Product Details

Published: 03/01/2012
ANSI Approved
Number of Pages:16
File Size: 1 file , 550 KB

Full Description

This Standard Practice establishes the minimum requirements for the application, design and installation of live-loaded stem

packing systems for valves designed in accordance with ASME B16.34, having rising and/or rotating stems. It applies to valves

with flexible graphite, polytetrafluoroethylene (PTFE), 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.

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