
Design ED & EAD Class 125-600
18
Figure 12. PTFE Packing Arrangement for Use in ENVIRO-SEAL Bellows Seal Bonnets
UPPER WIPER
(KEY 12)
MALE ADAPTOR
PACKING RING
FEMALE ADAPTOR
SPACER
(KEY 8)
SPACER (KEY 8)
SPACER (KEY 8)
12B4182-A
12B4185-A SHT 1
12B4182-A SHT 2
12B4185-A SHT 2
A5885 / IL
THRUST
RING (KEY 39)
SPRING
(KEY 8)
THRUST
RING
(KEY 39)
BUSHING
(KEY 13)
PACKING SET
(KEY 6)
9.5 mm
(3/8ĆINCH) STEM
12.7 mm
(1/2ĆINCH)
STEM
9.5 mm
(3/8ĆINCH)
STEM
12.7 mm
(1/2ĆINCH)
STEM
FOR S31603 (316 SST) PACKING
BOX PARTS
FOR ALL PACKING BOX MATERIALS
EXCEPT S31603
SINGLE ARRANGEMENTS
UPPER WIPER
(KEY 12)
MALE ADAPTOR
PACKING RING
FEMALE ADAPTOR
SPACER (KEY 8)
BUSHING
(KEY 13)
PACKING SET
(KEY 6)
BUSHING
(KEY 13)
SPACER
(KEY 8)
BUSHING
(KEY 13)
THRUST
RING
(KEY 39)
9.5 mm
(3/8ĆINCH)
STEM
12.7 mm
(1/2ĆINCH)
STEM, 2ĆINCH
VALVES
12.7 mm
(1/2ĆINCH)
STEM, 3Ć AND 4ĆINCH
VALVES
DOUBLE ARRANGEMENTS
12B4183-A
18A0906-C
18A5338-A
A5886 / IL
Note
The ENVIRO-SEAL stem/bellows
assembly for Design E valves is
available only with a threaded and
pinned plug/adaptor/stem connection.
The existing valve plug can be reused
with the new stem/bellows assembly or a
new plug can be installed. If the existing
valve plug is reused, and the adaptor is
in good condition, it may be reused also.
However, never reuse an old adaptor
with a new valve plug. Using an old
adaptor with a new valve plug requires
drilling a new pin hole in the adaptor.
This drilling weakens the adaptor and
may cause failure in service. However, a
used valve plug may be reused with a
new adaptor.
3. Inspect the existing valve plug and adaptor. If they
are in good condition, they can be reused with the new
stem/bellows assembly and they do not need to be
separated.