Historical
MSS SP-120-2006
Flexible Graphite Packing System for Rising Stem Steel Valves - Design Requirements
- This Standard Practice establishes material and dimensional requirements for valve packing, packing chamber, packing gland, packing washer, bonnet, and stem as they relate to the total packing assembly.
- This Standard Practice applies to standard, special, and limited Class 150 through Class 4500 (including intermediate classes) ASME B16.34 type steel gate, globe, and angle valves designed with rotating/ rising and non-rotating/rising stems.
- This Standard Practice applies to valves in which a flexible graphite packing assembly is used as the primary stem-sealing system.
- This Standard Practice does not apply to valves that include a lantern ring as part of its packing system nor to bonnetless valves with split glands.
Content Provider
Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. [mss]
