Dixon G8 Series User manual

G8-Series Bellows
Sealed Globe Valve
dixonvalve.com
Customer Service
877.963.4966
Instruction Manual for

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Table of Contents
General Information ......................................................................................................................................................................................3
Warning and Safety.......................................................................................................................................................................................3
Warnings........................................................................................................................................................................................................ 3
Cautions.........................................................................................................................................................................................................3
Notes..............................................................................................................................................................................................................3
Overview ........................................................................................................................................................................................................4
General Description.......................................................................................................................................................................................4
Storage ..........................................................................................................................................................................................................4
Installation..................................................................................................................................................................................................... 4
Operation .......................................................................................................................................................................................................5
Maintenance.................................................................................................................................................................................................. 5
Disassembly ..................................................................................................................................................................................................6
Valve Assembly.............................................................................................................................................................................................9
Cv vs. Stroke Curves ...................................................................................................................................................................................10
Spare Parts..................................................................................................................................................................................................11
Materials and Dimensions.....................................................................................................................................................................12-14
Revision History ..........................................................................................................................................................................................15

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Dixon Eagle®valves are designed to work safely for their intended use. Failure to know the intended use, or to consider factors
such as size, temperature, application, media, pressure, and manufacturers' recommendations when choosing the appropriate
valve assembly components, can lead to accidents and injuries. Dixon®recommends that all valve assemblies be tested in accor-
dance with ASME and API recommendations and be inspected regularly to ensure that their use remains appropriate and that they
are not damaged.
General Information
Warning and Safety
Warnings
Warnings contain important information related to hazard conditions, procedures and / or practices that if not followed could
result in serious injury or death to personnel or catastrophic damage to equipment or material.
WARNING:
A warning will appear with a red triangle to the left of the information the warning pertains to.
Cautions
Cautions contain important information related to conditions, procedures and / or practices that if not followed could result in
damage to equipment or material.
CAUTION:
A caution will appear with a yellow triangle to the left of the information the caution pertains to.
Notes
Notes contain important information related to conditions, procedures and / or practices that are intended to provide helpful
information, clarication and / or things to consider.
NOTE:
A note will appear with a black triangle to the left of the information the note pertains to.

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Overview
This instruction manual provides information on installation, operation, and maintenance for Eagle G8-series bolted bonnet bellows
seal globe valves. While socket weld ends are shown in the diagrams located in this manual, this document applies to all G8 bel-
lows seal globe valves from 1/2” to 2” with any type of end connection, i.e. socket weld, butt weld, and anged connections.
Pressure and temperature ratings are per ASME B16.34 current revision. Refer to current revision of the standard.
For identication of valve parts please refer pages 12 and 13 — Materials and Dimensions — for reference.
For any questions regarding this manual please contact [e-mail] for clarication.
General Description
The valve is a standard bolted bonnet globe valve with bellows seal.
Primary stem sealing is accomplished by a bellows seal. Backup (secondary) stem sealing is provided by braided graphite packing.
Body / bonnet sealing is accomplished with two spiral wound graphite gaskets.
Storage
To maintain the cleanliness of the valve, do not remove from plastic bag while in storage. Do not remove sealing cap on each end
connection until the valve is ready to be installed in the pipeline. The purpose of these sealing caps is to prevent debris from enter-
ing the body of the valve.
Installation
Before installation, inspect welding surfaces of the valve body and piping, ange faces, or threaded surfaces to be certain they are
clean and free from any foreign materials.
Disassembling the valve when welding is not recommended. If disassembly is necessary, the components should be marked to
maintain the original position.
WARNING:
Disassembling the valve will invalidate any factory testing and a proper acceptance test must
then be conducted by the user.
When welding, the valve should be fully closed. Heat input should be minimized to prevent seat distortion.

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Operation
Operate the valve by hand; never use a wrench or other tool to turn the handwheel. Over-torquing the valve may cause damage.
To close the valve, turn the handwheel clockwise. To open the valve, turn the handwheel counter-clockwise as shown on
the nameplate.
If seat leakage is observed after closing the valve, the valve should be cracked open for a short time to ush any dirt or foreign
matter which may have collected on the seat. Close the valve hand tight again and check for leakage.
Maintenance
Periodic checks with a bubble leak detector uid at the interface of the body and bonnet, as well as the packing area, is recom-
mended to ensure the integrity of the gaskets and bellows.
Proper lubrication shall be periodically applied to the stem and yoke sleeve threads using the grease tting. Ensure the lubricant is
compatible with the application.
To replace or add packing online:
• As a precaution, shut down the line in which the valve is operating.
• Open the valve fully and make sure it is back seated.
• Loosen and remove the gland bolt hex nuts.
• Push the gland plate and gland bushing up to the yoke to expose the packing area.
• Add packing or replace packing as needed.
• Reinstall the gland bushing and gland plate.
• Tighten hex nuts on gland bolts uniformly and evenly, moving from one side to the other.

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Disassembly
WARNING:
Before starting any work on the valve, ensure plant personnel are aware of the work being per-
formed and complete relief of pressure on the line.
Remove the joint bolts holding the body and bonnet together.
Lift the bonnet and stem assembly out from the body. Remove the lower gasket.

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CAUTION:
When setting the disc aside, ensure the sealing surfaces are not in contact with other hard
surfaces to prevent scratching.
Loosen the gland nuts to loosen the packing.
Remove the disc from the stem. Turn the handwheel clockwise to push the stem out of the yoke sleeve. Once the stem is clear of
the yoke sleeve, remove the stem from the bonnet. Remove the top gasket.

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Unfasten the handwheel nut. Remove the nameplate, the handwheel, and the upper thrust collar.
Remove the gland nuts fully. Take off the gland plate and gland bushing. Remove the packing from the bonnet. If replacing,
unfasten the grease tting and remove.

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Valve Size Carbon Steel A105 Valves
Torque (Ft-Lb) Maximum
Stainless Steel F316L Valves
Torque (Ft-Lb) Maximum
3/4” or smaller 23 15
1” 50 25
1-1/2” 70 25
2” 100 35
The lower thrust collar and yoke sleeve can now be removed from the bonnet.
Valve Assembly
Assemble the valve in the reverse of the disassembly procedure. However, some points listed below are important to follow:
Gasket seating surfaces on the body, bonnet, bellows assembly, and gasket shall be thoroughly cleaned with a cleaning agent such
as semiconductor grade acetone before assembling. Threads shall be lubricated. When tightening the joint bolts on the body /
bonnet joint, torque the fasteners to the appropriate value from the following table.
Before installing the bellows / stem assembly, ensure the packing, gland bushing, and gland plate are installed. Thread on the gland
nuts but leave them loose.
Install new gaskets and gland packing set. Do not reuse the previously installed gaskets and packing.
When installing bellows / stem assembly into the bonnet, ensure the guide pin slides into the guide pin slot.

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Dixon Eagle® G8-series globe valves feature a quick opening disc design that can be used as a method for throttling ow. The
following chart shows the ow coecient (Cv) vs. stroke, where the stroke is measured as the axial travel of the stem from a full
closed position of the valve.
Cv vs. Stroke Curves
Valve Size Travel per Handwheel Turn
1/2 0.08 in
3/4 0.08 in
1 0.08 in
1-1/2 0.125 in
2 0.125 in
.

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Materials and Dimensions
The following drawings and bill of materials contain the materials and dimensions for the G8 carbon steel and stainless steel series
globe valves, 1/2” to 2”.
Refer to Dixon Eagle®valve description key for assembly part numbers.
Spare Parts
The following parts are recommended to stock as spare parts for normal operation and maintenance.
It is recommended to replace the bellows assembly after the valve has been actuated for 10,000 cycles.
Refer to the bill of materials provided on pages 12 and 13 for part numbers.
Description Material Required
gasket graphite / 316 stainless steel 2
gland packing graphite 1 set

12 G8BSGV Manual | IOMdixonvalve.com • 800.789.1718
Part Number
Item Nomenclature 1/2" 3/4" 1" 1-1/2" 2" Material Qty. 1-1 socket weld body --- --- --- --- --- ASTM A105 / HF 1 1-2 threaded body --- --- --- --- --- ASTM A105 / HF 1 1-3 anged
body
150 300 600
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
ASTM A105 / HF 1
2 bonnet --- --- --- --- --- ASTM A105 1 3 disc 170064-050 170064-050 170064-100 170064-150 170064-200 420 stainless steel 1
bellow kits 270023-050(REP) 270023-050(REP) 270023-100(REP) 270023-150(REP) 270023-200(REP) alloy 625 / 316L
stainless steel
4 bellows assembly --- --- --- --- --- alloy 625 / 316L
stainless steel
1
5 stem --- --- --- --- --- 410 stainless steel 1 6 guide pin --- --- --- --- --- carbon steel 1 7 joint bolt 170039-050 170039-050 170039-100 170039-150 170039-200 ASTM A193 B7 4 8 gasket 170042-050 170042-050 170042-100 170042-150 170042-200 graphite / 316
stainless steel
2
9 gland packing 170043-050 170043-050 170043-100 170043-150 170043-200 graphite 1 set 10 gland bushing 170017-050 170017-050 170017-100 170017-150 170017-200 410 stainless steel 1 11 gland plate 170019-050 170019-050 170019-100 170019-150 170019-200
carbon steel
1
12 gland bolt 170021-050 170021-050 170021-100 170021-150 170021-200 410 stainless steel 2 13 hex nut N23118000X942H N23118000X942H N23816000X942H N23816000X942H N13816000X942H ASTM A194 2H 2 14 pin 170023-050 170023-050 170023-100 170023-150 170023-200 410 stainless steel 2 15 yoke sleeve 170027-050 170027-050 170027-100 170027-150 170027-200 410 stainless steel 1 16 grease tting 170045 170045 170045 170045 170045 commercial 1 17 thrust collar 170029-050 170029-050 170029-100 170029-150 170029-200 410 stainless steel 2 18 handwheel 170044-050 170044-050 170044-100 170044-150 170044-200 malleable iron 1 19 handwheel nut 170031-050 170031-050 170031-100 170031-150 170031-200 carbon steel 1 20 nameplate --- --- --- --- --- aluminum 1
Standard Materials for Carbon Steel G8 Globe Valves

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Part Number
Item Nomenclature 1/2" 3/4" 1" 1-1/2" 2" Material Qty. 1-1 socket weld body --- --- --- --- --- A182 F316L stainless
steel / HF
1
1-2 threaded body --- --- --- --- --- A182 F316L stainless
steel / HF
1
1-3 anged
body
150 300 600
--- --- ---
--- --- ---
--- --- ---
--- --- ---
--- --- ---
A182 F316L stainless steel / HF
1
2 bonnet --- --- --- --- --- A182 F316L stainless
steel / HF
1
3 disc 170065-050 170065-050 170065-100 170065-150 170065-200 316 stainless steel /
HF
1
bellow kits 270024-050(REP) 270024-050(REP) 270024-100(REP) 270024-150(REP) 270024-200(REP) alloy 625 / 316L
stainless steel
4 bellows assembly --- --- --- --- --- alloy 625 / 316L
stainless steel
1
5 stem --- --- --- --- --- 316 stainless steel 1 6 guide pin --- --- --- --- --- carbon steel 1 7 joint bolt 170040-050 170040-050 170040-100 170040-150 170040-200 ASTM A193 B8 4 8 gasket 170042-050 170042-050 170042-100 170042-150 170042-200 graphite / 316
stainless steel
2
9 gland packing 170043-050 170043-050 170043-100 170043-150 170043-200 graphite 1 set 10 gland bushing 170018-050 170018-050 170018-100 170018-150 170018-200 304 stainless steel 1 11 gland plate 170020-050 170020-050 170020-100 170020-150 170020-200 316 stainless steel 1 12 gland bolt 170022-050 170022-050 170022-100 170022-150 170022-200 304 stainless steel 2 13 hex nut
N23118000X4G8M N23118000X4G8M
N23816000X4G8M N23816000X4G8M N13816000X4G8M
ASTM A194 GR. 8M 2
14 pin 170024-050 170024-050 170024-100 170024-150 170024-200 304 stainless steel 2 15 yoke sleeve 170028-050 170028-050 170028-100 170028-150 170028-200 copper alloy 1 16 grease tting 170045 170045 170045 170045 170045 commercial 1 17 thrust collar 170029-050 170029-050 170029-100 170029-150 170029-200 410 stainless steel 2 18 handwheel 170044-050 170044-050 170044-100 170044-150 170044-200 malleable iron 1 19 handwheel nut 170032-050 170032-050 170032-100 170032-150 170032-200 304 stainless steel 1 20 nameplate --- --- --- --- --- aluminum 1
Standard Materials for Stainless Steel G8 Globe Valves

14 G8BSGV Manual | IOMdixonvalve.com • 800.789.1718
Size d A d1 h L1 H D Lift Wt (lbs) Cv
1/2" 0.63 1.34 0.855 0.39 3.11 8.3 3.94 0.26 5.9 2.7
3/4" 0.87 1.57 1.065 0.51 3.62 8.3 3.94 0.26 6.2 3.1
1" 1.10 1.93 1.330 0.51 4.37 9.2 4.92 0.26 11.0 5.4
1-1/2" 1.65 2.56 1.915 0.51 5.98 11.9 6.30 0.43 21.0 13.4
2" 2.05 3.07 2.406 0.63 6.77 12.8 7.09 0.49 30.0 23.0
Socket Weld / Thread Globe Valves
Size 150 300 600
L2 C Wt (lbs) L2 C Wt (lbs) L2 C Wt (lbs)
1/2" 4.25 3.50 8.0 6.00 3.75 10.0 6.50 3.75 10.0
3/4" 4.62 3.88 9.0 7.00 4.62 13.0 7.50 4.62 14.0
1" 5.00 4.25 15.0 8.00 4.88 19.0 8.50 4.88 20.0
1-1/2" 6.50 5.00 27.0 9.00 6.12 35.0 9.50 6.12 36.0
2" 8.00 6.00 41.0 10.50 6.50 49.0 11.50 6.50 51.0
Flanged Globe Valves
ALL DIA. MUST BE CONC. WITHIN .010 F.I.R.
ALL MACHINED SURFACES
1/2°
.005
.010
1/32
FRACTION XX PLACES .XXX PLACES ANGLES
TOLERANCES
BREAK SHARP EDGES .003-.015
DIMEMSIONS ARE IN INCHES
MATERIAL
DRAWN BY
CHECKED BY
APPROVED BY
SIZE DWG NO. REV.
SE:
C
SEET OF
N.T.S.
G8-IOM
BMS
BMS
00
UCM
BELLOWS SEAL GLOBE VALVE
1/2-2 G8 SERIES VALVES
-
05/11/23
05/11/23
05/11/23
1 1
DIXON VALVE AND CO PLING COMPANY
6525 HOMESTEAD RD., HO STON, TX 77028, SA
[phone] [phone]
UNLESS OTHERWISE SPECIFIED
PROPRIETARY AND CONFIDENTIAL
WHERE USED
-
THE INFORMATION CONTAINED IN
THIS DRAWING IS THE SOLE
PROPERTY OF DIXON VALVE AND
COUPLING COMPANY (DVCC). ANY
REPRODUCTION OR DISCLOSURE
IN PART OR AS A WHOLE
WITHOUT THE WRITTEN
PERMISSION OF DVCC IS
PROHIITED.
125
ENG000292
FIRST USED:
SEE BOM
REV APPROVEDDESCRIPTION
REVISIONS
DATE
00 BMSORIGINAL ISSUE 0
ECN
-
DRAN
UCM
H
OPEN
D
1
2
4
5
6
7
8
9
1
11
12
13
14
15 16
17
18
19
2
3
C
dd1A
L1
L
2"
1 1/2"
1"
3/4"
1/2"
SIZE
2.05
1.65
1.10
0.87
0.63
d
3.07
2.56
1.93
1.57
1.34
A
2.406
1.915
1.330
1.065
0.855
d1
0.63
0.51
0.51
0.51
0.39
h
6.77
5.98
4.37
3.62
3.11
L1
12.8
11.9
9.2
8.3
8.3
H
7.09
6.30
4.92
3.94
3.94
D
0.49
0.43
0.26
0.26
0.26
LI
30.0
21.0
11.0
6.2
5.9
Wt ( bs)
23.0
13.4
5.4
3.1
2.7
Cv
2"
1 1/2"
1"
3/4"
1/2"
SIZE
8.00
6.50
5.00
4.62
4.25
L2
6.00
5.00
4.25
3.88
3.50
C
41.0
27.0
15.0
9.0
8.0
Wt ( bs)
10.50
9.00
8.00
7.00
6.00
L2
6.50
6.12
4.88
4.62
3.75
C
49.0
35.0
19.0
13.0
10.0
Wt ( bs)
11.50
9.50
8.50
7.50
6.50
L2
6.50
6.12
4.88
4.62
3.75
C
51.0
36.0
20.0
14.0
10.0
Wt ( bs)
150 300 600
SOCKET WELD / THREADED GLOBE VALVES
FLANGED GLOBE VALVES
h
H
OPEN
A d1 d
h
L1
L2
C
D
18
17
15
13
11
12
14
5
6
8
19
20
16
10
9
7
2
4
3
1

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Revision History
Consult Dixon®for the latest issue of this document.
Revision ECN Number Description Date Changed By Approved By
0 --- original issue 05/11/2023 UCM BMS

connect with us on
6525 Homestead Road
Houston, TX 77028
Customer Service: 877.963.4966
dixonvalve.com
Dixon®
© 2023 DVCC Printed in the USA G8BSGV | IOM_923