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Packing Box Assembly
Visually inspect the stem & packing box for cleanliness and proper
surface finish. Lubricate the I.D. of the packing box with Never-
Seez or equivalent. Assemble the packing box components per
the maintenance instructions on page 5.
Figure 4: Standard Packing
Figure 5: 285C or Latty 326.1M Packing
Figure 6: Graphite Packing
1 V-Ring Packing Adapter 7 Pieces: V-Ring Packing
6 Pieces: 285C 6 Pieces: Latty 326.1
Low-E Packing (Optional)
The Masoneilan Low-E (Low Emissions) Packing is a high
performance packing system capable of containing fugitive
emissions well below the specifications of the most severe
recommendations. It is also available in a firesafe configuration.
Figure 7: Low-E Packing Configuration
(Shown in Loaded Position)
Packing Set
Follower Assembly
Part
Qty Part
Qty
VESPEL Female Adapter
1 Upper Follower
1
KALREZ V-Ring
2 Disc Spring
8
VESPEL V-Ring
1 Lower Follower
1
VESPEL Male Adapter
1
The packing is provided as a set of five pieces. It consists of
two adapter rings and three V-rings. An alternating pattern of
Perfluoroelastomer (PFE) and long carbon fiber filled Teflon
(PTFE) V-rings are used.
Applied properly, this packing exhibits very little cold flow (or
creep). Consequently, it can effectively prevent fugitive emissions
leaks from a control valve. The Low-E Packing system can
directly replace conventional packing, requiring no modification
to the control valve or actuator.
A spring loaded, two-piece follower assembly is used to maintain
a constant load on the packing, and is necessary for thermal
cycling applications. As the definition of thermal cycling can vary,
and processes are potentially subject to unpredicted thermal
gradients, Low-E Packing is only available with the spring loaded
follower.
Installation should be performed as detailed in the following
paragraphs.
