Standard Material Designations; Parts Ordering; Purging The Enviro-Seal Bellows Seal Bonnet - Fisher ET Instruction Manual

ET Valve
Standard Designation
CoCr-A Hardfacing Alloy
WCC Carbon Steel Casting
1
1
1
1
18A0909-D
12B4181-A
9.5 mm 12.7 mm
(3/8 INCH) (1/2 INCH)
STEM STEM FOR
2 INCH
VALVES
NOTE:
1 0.102 mm (0.004 INCH) THICK SACRIFICIAL ZINC WASHERS;
USE ONLY ONE BELOW EACH GRAPHITE RIBBON RING.
A5870 / IL
Figure 9. Double Graphite Ribbon/Filament Arrangements for
Use in ENVIRO-SEAL Bellows Seal Bonnets
7. Complete the installation by following steps 7
through 9 and steps 12 through 15 of the
ENVIRO-SEAL Bellows Seal Bonnet installation
instructions found on pages 12 and 13.
Purging the ENVIRO-SEAL Bellows Seal
Bonnet
The ENVIRO-SEAL bellows seal bonnet can be
purged or leak tested. Refer to figure 14 for an
illustration of an ENVIRO-SEAL bellows seal bonnet,
and perform the following steps for purging or leak
testing.
1. Remove the two diametrically opposed pipe plugs
(key 16).
2. Connect a purging fluid to one of the pipe plug
connections.
16
Table 7. Standard Material Designations
R30006
S17400 SST
S31600 SST
S41000 SST
S41600 SST
BUSHING
(KEY 13)
GRAPHITE
FILAMENT
PACKING RING
(KEY 7)
GRAPHITE
1
RIBBON
PACKING RING
(KEY 7)
SPACER
1
(KEY 8)
12B6102-A
12.7 mm
(1/2 INCH)
STEM FOR
3 AND 4 INCH
VALVES
Common Name or Tradename
CoCr-A
Alloy 6 Casting
17-4PH Stainless Steel
316 Stainless Steel
410 Stainless Steel
416 Stainless Steel
WCC
3. Install appropriate piping or tubing in the other
pipe plug connection to pipe away the purging fluid
or to make a connection to an analyzer for leak
testing.
4. When purging or leak testing has been
completed, remove the piping or tubing and reinstall
the pipe plugs (key 16).
Fisher does not assume responsibility
for the selection, use, or maintenance
of any product. Responsibility for
proper selection, use, and
maintenance of any Fisher product
remains solely with the purchaser and
end-user.

Parts Ordering

Each body-bonnet assembly is assigned a serial
number which can be found on the valve. This same
number also appears on the actuator nameplate
when the valve is shipped from the factory as part of
a control valve assembly. Refer to the serial number
when contacting your Fisher representative for
technical assistance. When ordering replacement
parts, refer to the serial number and to the
eleven-character part number for each part required
from the following parts kit or parts list information.
Components that are not manufactured by Fisher
should not, under any circumstances, be used in any
Fisher valve. The use of parts not manufactured by
Fisher may adversely affect the performance of the
valve as well as worker and workplace safety.
Refer to table 7 for standard and common material
designations.
Instruction Manual
Form 5081
June 2002
Note