
ET Valve
Instruction Manual
Form 5081
June 2002
6
Figure 3. PTFE V-Ring Packing Arrangements for Plain and Extension Bonnets
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER (KEY 13)
LANTERN RING
(KEY 8)
PACKING BOX
RING (KEY 11)
MALE ADAPTOR
PACKING RING
FEMALE ADAPTOR
LOWER WIPER
ASSEMBLY 1
(POSITIVE
PRESSURES)
ASSEMBLY 2
(VACUUM)
ASSEMBLY 3
(POSITIVE
PRESSURES
& VACUUM)
ASSEMBLY 1
(POSITIVE
PRESSURES)
ASSEMBLY 2
(VACUUM)
ASSEMBLY 3
(POSITIVE
PRESSURES
& VACUUM)
ASSEMBLY 1
(POSITIVE
PRESSURES)
ASSEMBLY 2
(VACUUM)
ASSEMBLY 3
(POSITIVE
PRESSURES
& VACUUM)
9.5 mm (3/8 INCH) STEM
12.7 mm (1/2 INCH) STEM
19.1, 25.4, OR 31.8 mm
(3/4, 1, OR 1Ć1/4 INCH) STEM
DOUBLE ARRANGEMENTS
12A8187-D
12A7814-D
12A7839-A
B1428-5 / IL
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER (KEY 13)
PACKING BOX
RING (KEY 11)
FOR 316 SST
METAL PACKING BOX PARTS
SINGLE ARRANGEMENTS
12A7837-A
B1429-5 / IL
FOR ALL OTHER METAL PACKING
BOX PART MATERIALS
SPACER (KEY 8)
UPPER WIPER
(KEY 12)
PACKING
FOLLOWER
(KEY 13)
PACKING BOX
RING (KEY 11)
FEMALE
ADAPTOR
FEMALE
ADAPTOR
MALE
ADAPTOR
PACKING
RING
MALE
ADAPTOR
PACKING
RING
WASHER
(KEY 10)
SPRING
(KEY 8)
LOWER
WIPER
LOWER
WIPER
1
1
1
1
1
1
1
1
NOTE:
MALE ADAPTOR, PACKING RING, FEMALE ADAPTOR,
AND LOWER WIPER ARE PART OF PACKING SET (KEY 6).
2 REQ’D FOR DOUBLE ARRANGEMENTS, EXCEPT LOWER WIPER.
1
CAUTION
Avoid damaging the seating surface
caused by the valve plug and stem
assembly dropping from the bonnet
(key 1, figure 14) after being lifted part
way 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.
4. Hex nuts (key 16, figure 16, 17, or 20) or cap
screws (not shown) attach the bonnet (key 1, figure
14) to the valve body (key 1, figure 16, 17, or 20).
Loosen these nuts or cap screws 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