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Flexible Graphite Packing Sealing for Rising Stem Valves

This Standard Practice is applicable to valves that use flexible graphite packing stem sealing to achieve reduced or low emissions.
This Standard Practice encompasses dimensions and tolerances applicable to ASME B16.34 gate and globe valves designed with rising non-rotating and rising rotating stems.
This Standard Practice applies to valves in which a flexible graphite packing assembly is used as the primary stem-sealing system.
Valves that include a lantern ring as part of its packing system, and bonnetless valves with split glands, are outside the scope of this Standard Practice.


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October 27, 2021

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