Instruction Manual
D100399X012
EW Valve
July 2017
12
6. Remove the locknut and separate the valve plug and stem from the bonnet. Set the parts on a protective surface to
prevent damage to gasket or seating surfaces.
gasket surface and prevent foreign material from getting into the valve body cavity.
8. Remove the packing flange nuts, packing flange, upper wiper, and packing follower (keys 5, 3, 12, and 13, figure
21). Carefully push out all the remaining packing parts from the valve side of the bonnet using a rounded rod or
other tool that will not scratch the packing box wall. Clean the packing box and the metal packing parts.
9. Inspect the valve stem threads and packing box surfaces for any sharp edges that might cut the packing. Scratches
or burrs could cause packing box leakage or damage to the new packing. If the surface condition cannot be
improved by light sanding, replace the damaged parts by following the appropriate steps in the Trim Maintenance
procedure.
making sure the gasket seating surfaces are clean and smooth. Place the stem and valve plug into the valve body
and slide the bonnet over the stem and onto the stud bolts (key 15, figure 22, 23, or 24).
Figure 6. Detail of Graphite Ribbon/Filament Packing
NOTES:
0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS;
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
PACKING
FOLLOWER
(KEY 13)
LANTERN
RING (KEY 8)
PACKING BOX
RING (KEY 11)
1
12.7 mm
(1/2 INCH)
STEM
SINGLE ARRANGEMENTS
A6067
GRAPHITE
RIBBON
PACKING RING
(KEY 7)
GRAPHITE
FILAMENT
PACKING RING
(KEY 7)
1
19.1, 25.4, & 31.8 mm
(3/4, 1 & 1‐1/4 INCH)
STEM
13A9775-B
13A9776-B
PACKING
FOLLOWER
(KEY 13)
LANTERN
RING (KEY 8)
PACKING BOX
RING (KEY 11)
1
12.7 mm
(1/2 INCH)
STEM
DOUBLE ARRANGEMENTS
GRAPHITE
RIBBON
PACKING RING
(KEY 7)
GRAPHITE
RIBBON
PACKING RING
(KEY 7)
GRAPHITE
FILAMENT
PACKING RING
(KEY 7)
1
19.1, 25.4, & 31.8 mm
(3/4, 1 & 1‐1/4 INCH)
STEM
14A1849-B
14A1780-B
1
1