Emerson Fisher NPS 2 CCV-N Instruction Manual page 6

CCV-N Valve
October 2018
Figure 2. Packing Arrangements
DOUBLE PTFE DOUBLE PTFE
12.7 mm 12.7 mm
(1/2 INCH) STEM (1/2 INCH) STEM
NOTE:
PACKING SET (KEY 6) CONTAINS A FEMALE ADAPTER,
1
V-RING PACKING RINGS, MALE ADAPTER, AND LOWER WIPER RINGS.
4. Hex nuts (key 16, figures 6, 7, 8, 12, 13, and 14) attach the bonnet (key 1, figures 3, 4, and 5) to the body (key 1,
figures 6, 7, 8, 12, 13, and 14). Loosen these nuts approximately 3 mm (1/8 inch). Then loosen the body-to-bonnet
gasketed joint by either rocking the bonnet or prying between the bonnet and valve. Work the prying tool around
the bonnet until the bonnet loosens. If no fluid leaks from the joint, remove the nuts or cap screws completely and
carefully lift the bonnet off the valve.
CAUTION
Avoid damaging the seating surface caused by the valve plug and stem assembly dropping from the bonnet (key 1, figure 3)
after being lifted partway out. When lifting the bonnet, temporarily install a valve stem locknut on the valve stem. The
locknut will prevent the valve plug and stem assembly from dropping out of the bonnet.
5. 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.
6. Remove the bonnet gasket (key 10 and 12, figures 6, 7, 8, 12, 13, and 14) and cover the opening in the valve to
protect the gasket surface and prevent foreign material from getting into the valve body cavity.
CAUTION
To prevent possible product damage, cover the opening in the valve in the following procedure to prevent foreign material
from getting into the valve body cavity.
7. Remove the packing flange nuts, packing flange, upper wiper, and packing follower when applicable (keys 3, 5, and
13, figure 4). For Enviro-Seal Graphite ULF packing, remove the packing flange nuts, packing flange, and spring pack
6
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER (KEY 13)
FEMALE
ADAPTER
1
PACKING RING
1
MALE
ADAPTER
1
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
LOWER WIPER
1
GRAPHITE LEAK-OFF
W
W
12.7 mm
(1/2 INCH) STEM
NOTE: INSTALL SACRIFICAL WASHERS AT PLACES MARKED 'W'
1 HAS THE APPEARANCE OF DIE FORMED GRAFOIL MATERIAL.
HAS THE APPEARANCE OF A WOVEN OR BRAIDED RING.
2
Instruction Manual
D104191X012
PACKING
FOLLOWER (KEY 13)
GRAPHITE RIBBON
PACKING RING (KEY 7)
1
LANTERN RING
(KEY 8)
GRAPHITE FILAMENT
PACKING RING (KEY 7)
2
PACKING BOX
RING (KEY 11)