Instruction Manual
D100398X012
ET Valve
November 2017
7
travel indicator parts and stem locknuts from the valve stem threads.
WARNING
To avoid personal injury or property damage caused by uncontrolled movement of the bonnet, loosen the bonnet by
following the instructions in the next step. Do not remove a stuck bonnet by pulling on it with equipment that can stretch
or store energy in any other manner. The sudden release of stored energy can cause uncontrolled movement of the bonnet.
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 1‐1/4 INCH) STEM
DOUBLE ARRANGEMENTS
A8187-D
12A7814-D
12A7839-A
B1428‐5
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
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