MSS Banner The Technical Voice of the Industry
View Larger Image


Live-Loaded Valve Stem Packing Systems

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), expanded polytetrafluoroethylene (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.


Today is: Sunday
November 29, 2020

MSS Member Login

MSS Brochure

MSS Scholarships

MSS Apparel

We Accept:
VISA  MasterCard  American Express
Discover  Diners Club 
Site Secured by:

Like us on:

Accept Credit Cards Online