Management of Change Guide: Replacing Fisher CE Valves with Fisher GX Valves
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Loading...Fisher Management of Change Guide: Replacing Fisher CE Valves with Fisher GX Valves Manuals & Guides
Management of Change Guide
September 2018 / D352220X012
Replacement of Fisher™ CE Valves with
Fisher GX Control Valves
Table of Contents
Management of Change ..................................2
Background ....................................................2
Question & Answer Checklist ..........................2
Fisher CE and GX Control Valve Comparison ....4
Capabilities by Size ............................................................. 4
Alloy Material Comparison .................................................. 9
ISA Long Face-to-Face Dimension ....................................... 9
Bellows Comparison ......................................................... 10
Valve and Actuator Features .............................................. 10
Conclusion .....................................................11
Additional Resources .....................................12
Management of Change
Management of Change (MOC) is a procedure used to proactively manage changes
that have the potential to impact safety or the process within a plant. Evaluating
new techniques for improving MOC approval procedures can have an impact on
plant efciency. Historically, upgrading obsolete products or replacing existing
process control equipment had been delayed or abandoned due to the extensive
paperwork involved in completing a complex MOC approval sheet.
Background
The Fisher CE valve was developed to meet the specic requirements of the
chemical industry and was the primary offering for the industrial process
application segment of the chemical industry until 1996. The CE was a globe-style,
single-port valve with stem guiding, quick-change trim, separable anges, and
clamped-in seat ring. The CE valve is an obsolete product and the 10-year guarantee
of recommended spare parts availability for obsolete products ended in 2006.
MOC: CE to GX Valves
September 2018 / D352220X012
The Fisher GX is a compact, multi-spring actuator and globe valve system that
can meet the requirements of the chemical market. The GX valve is rugged,
reliable, and easy to select. It requires no actuator sizing—the actuator selection is
automatic once the valve body construction and available plant air supply pressure
are selected. A key feature of the GX valve is the ability to integrally mount the
FIELDVUE™ DVC2000 or DVC6200 digital valve controller for linkage-less position
feedback. With a global installed base of nearly 100,000 units, the GX is a proven
and reliable control valve solution for a wide array of applications across a broad
range of industries.
Contained in the following sections are design comparisons between the current
Fisher GX control valve and obsolete Fisher CE, Class 150 and Class 300 control
valves. These comparisons are intended to help end users complete MOC approval
documents to understand the similarities and differences between GX and CE valves
to effectively transition to the GX valve.
Question & Answer Checklist
Q: Does the proposed modication cause any changes to the piping and
1
instrumentation diagram (P&ID)?
A: No.
Q: Does the proposed modication change process chemistry,
2
technology, or operating and control philosophies?
A: No.
2
Q: Does the proposed modication change how the existing plant is
3
4
5
operated?
A: Possibly. Review capacity information to ensure no issues will take
place.
Q: Does the proposed modication change process ows?
A: Possibly. Review capacity information to ensure no issues will take
place.
Q: Does the proposed modication change existing pressure relief cases?
A: Possibly. If the GX replacement selection exceeds the maximum rated
Cv of the existing CE valve, then pressure relief cases will require
review. Pressure relief valve sizing is not considered when sizing and
selecting Fisher control valves for end user applications. If the control
valve is determined to affect upstream or downstream safety relief
cases, review by the end user or third party is recommended.
MOC: CE to GX Valves
September 2018 / D352220X012
Q: Does the proposed modication change the process description?
6
A: No.
Q: Have the codes and standards to which the new equipment was
7
8
9
10
designed changed?
A: No.
Q: Does the proposed modication change the materials of construction,
such as a change in material form (cast, forged, or alloy)?
A: No.
Q: Does the proposed modication introduce new equipment items that
require periodic predictive maintenance?
A: No. These equipment items will require the same periodic predictive
maintenance.
Q: Does the proposed modication change existing operator training
requirements?
A: No.
3
Q: Does the proposed modication introduce new equipment items
11
12
13
that require spare parts, training manuals, maintenance procedures
or training to teach the maintenance department how to maintain
them?
A: Yes. Emerson sales ofces offer local training and support to help
ensure operators, maintenance personnel, and instrument technicians
are fully trained on the Fisher GX control valve.
Q: Does the proposed modication introduce new equipment items that
require spares or obsolete spares for existing equipment?
A: Yes. New spares will be required for the Fisher GX valve, which are not
compatible with the CE valve.
Q: Does the proposed modication permanently remove the spares for
existing pieces of equipment?
A: Yes. The spare parts of the existing equipment items should be
removed from the plant.
MOC: CE to GX Valves
September 2018 / D352220X012
Q: Does the proposed modication change the inspection scope or
14
inspection interval?
A: No.
Fisher CE and GX Control Valve Comparison
The Fisher GX valve is capable of being used in a broad range of industries and
applications. It has been designed as the primary replacement for the CE valve.
The tables and sections that follow describe the similarities and differences
between these two products.
Capabilities by Size
Due to differences in ow geometry and small variations in sizing coefcients, each
valve should be reviewed to help ensure the appropriate GX valve is selected for the
application. This sizing review should be completed using current Fisher valve sizing
software. The following tables provide the necessary catalog sizing and capacity
information to compare the CE valve to the GX valve.
4
MOC: CE to GX Valves
September 2018 / D352220X012
Capacity (Unbalanced) ΔP (bar)
Typ e NPS
Full Port Size
Cv -
Flow Up
Cv -
Flow
Down
Reduced
Port
Port Size
Cv -
Flow Up
Full Port Seat Type
4.8mm (3/16 in) 0.667
Equal
Percentage
14.2mm
(3/4 in)
10.9 12
Equal
Percentage
6.4mm (1/4 in) 1.59
9.5mm (3/8 in) 3.5
12.7mm (1/2 in) 5.63
CE 1
Linear
14.2mm
(3/4 in)
11 12.2 Linear
4.8mm (3/16 in)
Flat Angle: 0° 24'
4.8mm (3/16 in)
Flat Angle: 1°
4.8mm (3/16 in)
Flat Angle: 1° 8'
4.8mm (3/16 in)
Flat Angle: 2° 15'
Flat Angle: 4° 39'
0.008
0.024
0.036
0.112
0.235
14.2mm
12.7mm (1/2 in) 5.79
Equal
Percentage
22mm 13.7 n/a
Equal
Percentage
9.5mm
Reduced Port
9.5mm 3.57
1.65
14mm 6.89
4.8mm 0.039
GX 1
Linear 22mm 15.5 n/a Linear
4.8mm 0.139
4.8mm 0.294
4.8mm 0.785
22mm Metal Seat 5 1. 7
9.5mm 3.7
14.0mm 7.8
1. For non-hard-faced trims, contact your local Emerson sales ofce. Values are the highest available for hard-faced trims.
delta P -
Shutoff
Metal Seat 51.7
Composition
Seat
51.7
1
Reduced
Port
4.8mm
Micro-at
4.8mm
6.4mm
9.5mm
12.7mm 51.7
4.8mm
Micro-at
4.8mm
6.4mm
9.5mm
12.7mm
4.8mm
9.5mm
14mm
delta P
-Shutoff
51.7
n/a
51.74.8mm (3/16 in)
51.7
5
MOC: CE to GX Valves
September 2018 / D352220X012
Capacity (Unbalanced) ΔP (bar)
Typ e NPS
Full
Port
Size
Cv -
Flow
Up
Cv -
Flow
Down
Reduced
Port
Port Size
Cv -
Flow
Up
Cv -
Flow
Down
Full Port
4.8mm (3/16 in) 0.667 -
6.4mm (1/4 in) 1.59 -
Equal
Percentage
2 8 . 5 m m
(1 1/8
in)
25.2 25
Equal
Percentage
9.5mm (3/8 in) 3.5 -
12.7mm (1/2 in) 5.91 -
14.2mm (3/4 in) 12.2 15.3
CE 1 1/2
Linear
2 8 . 5 m m
(1 1/8
in)
24.8 27.8 Linear
4.8mm (3/16 in)
Flat Angle: 0° 24'
4.8mm (3/16 in)
Flat Angle: 1°
4.8mm (3/16 in)
Flat Angle: 1° 8'
4.8mm (3/16 in)
Flat Angle: 2° 15'
4.8mm (3/16 in)
Flat Angle: 4° 39'
0.008 -
0.024 -
0.036 -
0.112 -
0.235 -
28.5mm
12.7mm (1/2 in) 6.08 -
14.2mm (3/4 in) 12.5 15.1
14mm 6.87 n/a
22mm 14.3 n/a
14mm 8.25 n/a
22mm 17.2 n/a
GX 1 1/2
Equal
Percentage
36mm 27.2 n/a
Percentage
Linear 36mm 32 n/a Linear
Equal
1. For non-hard-faced trims, contact your local Emerson sales ofce. Values are the highest available for hard-faced trims.
36mm
Seat
Typ e
Metal
Seat
Comp-
osition
Seat
Metal
or PTFE
delta P -
Shutoff
51.7
51.7
51.7
1
Reduced
Micro-at
12.7mm
14.2mm
Micro-at
12.7mm
14.2mm
Port
4.8mm
4.8mm
6.4mm
9.5mm
4.8mm
4.8mm
6.4mm
9.5mm
14mm
22mm
delta P
-Shutoff
51.7
51.7
n/a
51.7
51.7
6
MOC: CE to GX Valves
September 2018 / D352220X012
Capacity (Unbalanced) ΔP (bar)
Typ e NPS
CE 2
GX 2
Full
Equal
Percentage
Linear
Equal
Percentage
Port
Size
38.1mm
(1 1/2
in)
38.1mm
(1 1/2 in)
46mm 43.7 n/a
Cv -
Flow
Up
45.7 46.5
46.3 48.7 Linear
Linear 46mm 48.6 n/a Linear
Cv -
Flow
Down
Reduced
Port
Equal
Percentage
Equal
Percentage
Cv -
Port Size
Flow
Up
Cv -
Flow
Down
19.1mm 12 -
28.5mm 25.5 28
19.1mm 12.3 -
28.5mm 27.6 31.7
22mm 14.3 n/a
36mm 28.6 n/a
22mm 17.2 n/a
36mm 33.9 n/a
Full Port
38.1mm
1. For non-hard-faced trims, contact your local Emerson sales ofce. Values are the highest available for hard-faced trims.
Capacity (Unbalanced) ΔP (bar)
Typ e NPS
CE 3
GX 3
Full
Equal
Percentage
Port
Size
6 3 . 5 m m
(2 1/2
in)
Cv -
Flow
Up
109 104
6 3 . 5 m m
Linear
(2 1/2
111 114 Linear
in)
Equal
Percentage
70mm 95.1 n/a
Linear 70mm 117 n/a Linear
Cv -
Flow
Down
Reduced
Port
Equal
Percentage
Equal
Percentage
Port Size
Flow
Up
Cv -
38 .1 mm
(1 1/2 in)
38 .1 mm
(1 1/2 in)
47.8 51.8
48.6 52.4
36mm 28.6 n/a
46mm 43.7 n/a
36mm 33.3 n/a
46mm 51.8 n/a
Cv -
Flow
Down
Full Port
63.5mm
(2 1/2 in)
1. For non-hard-faced trims, contact your local Emerson sales ofce. Values are the highest available for hard-faced trims.
46mm
70mm
Seat
Typ e
Metal
Seat
Composition
Seat
Metal
or PTFE
Seat
Typ e
Metal
Seat
Comp-
osition
Seat
Metal
or PTFE
delta P -
Shutoff
(Flowing)
51.7
(34.7)
51.7
delta P -
Shutoff
(Flowing)
51.7
(27.8)
33.1
1
Reduced
Port
19.1mm
28.5mm
22mm
36mm
1
Reduced
Port
38.1mm
(1 1/2 in)
36mm 51.7
46mm 48.4
delta P
-Shutoff
(Flowing)
51.7
51.7
delta P
-Shutoff
(Flowing)
51.7
(34.7)
Capacity (Balanced) ΔP (bar)
Typ e NPS
GX 3
Full
Equal
Percentage
Port
Size
Cv -
Flow
Up
70mm 75.7 n/a
Cv -
Flow
Down
Reduced
Port
Equal
Percentage
Port Size
Flow
Up
n/a n/a n/a
Cv -
Cv -
Flow
Down
Full Port
Linear 70mm 102 n/a Linear n/a n/a n/a n/a n/a
1. For non-hard-faced trims, contact your local Emerson sales ofce. Values are the highest available for hard-faced trims.
7
Seat
delta P -
Typ e
Shutoff
70mm Metal 51.7
1
Reduced
Port
n/a n/a
delta P
-Shutoff
MOC: CE to GX Valves
September 2018 / D352220X012
Capacity (Unbalanced) ΔP (bar)
Typ e NPS
CE 4
GX 4
Full
Equal
Percentage
Linear
Equal
Percentage
Port
Size
82.6 (3
1/4 in)
82.6 (3
1/4 in)
90mm 165 n/a
Cv -
Flow
Up
179 168
195 179 Linear
Linear 90mm 184 n/a Linear
Cv -
Flow
Down
Reduced
Port
Equal
Percentage
Equal
Percentage
Port Size
Flow
Up
Cv -
63.5mm (2
1/2 in)
63.5mm (2
1/2 in)
117 118
128 132
46mm 44 n/a
70mm 97.7 n/a
46mm 52.2 n/a
70mm 128 n/a
Cv -
Flow
Down
1. For non-hard-faced trims, contact your local Emerson sales ofce. Values are the highest available for hard-faced trims.
Capacity (Balanced) ΔP (bar)
Typ e NPS
GX 4
Full
Equal
Percentage
Port
Size
90mm 128 n/a
Cv -
Flow
Up
Linear 90mm 151 n/a Linear
Cv -
Flow
Down
Reduced
Port
Equal
Percentage
Port Size
90mm
Restricted
90mm
Restricted
Cv -
Up
Cv -
Flow
Down
Flow
68.5 n/a
92.3 n/a
1. For non-hard-faced trims, contact your local Emerson sales ofce. Values are the highest available for hard-faced trims.
Table 1. Capabilities by Size
delta P -
Full Port
Seat
Typ e
Shutoff
(Flowing)
Metal
82.6
(3 1/4 in)
Seat
Comp-
osition
(17.4)
Seat
90mm
Full Port
Metal
or PTFE
Seat
Typ e
delta P -
Shutoff
90mm Metal 51.7
51.7
20
1
Reduced
Port
63.5mm
(2 1/2 in)
46mm 48.4
70mm 33.1
1
Reduced
Port
90mm
Restricted
90mm
Restricted
delta P
-Shutoff
(Flowing)
51.7
(27.8)
delta P
-Shutoff
51.7
51.7
8
MOC: CE to GX Valves
September 2018 / D352220X012
Typ e NPS
IV V VI
Shutoff Class
CE All Standard Optional for Metal Seat Composition Seat
GX
Table 2. Shutoff Class Availability
1 Standard Optional for Metal Seat
1.5–4 Standard Optional for Metal Seat Optional PTFE Seat
Alloy Material Comparison
Please see the table below for alloy materials. It is important to note the Fisher GX
CN3MCu / CN7M (Alloy 20) valve body is only supplied with Hastelloy C trim.
Typ e NPS
CF3M WCC Alloy 20 MONEL CW2M CF3 N7M LCC CD3MN
Body Material
CE All X X X X X X X
GX All X X X X X X X X X
Table 3. Material Availability
ISA Long Face-to-Face Dimension
The standard CE valve was an ISA long face-to-face dimension valve body. While the
use of spool pieces or concentric reducers could be used to make up the difference
between ISA long and ANSI standard face-to-face dimensions, the GX valve is also
offered in ISA long congurations in specic standard and alloy materials. Table 4
below highlights the differences between CE and GX valves.
Typ e NPS
WCC CF3M CW2M LCC Alloy 20 MONEL CF3 N7M
Body Material
CE 1 X X X X X X X X
GX 1 X X X X
CE 1.5 X X X X X X X X
GX 1.5 X X X X
CE 2 X X X X X X X X
GX 2 X X X X
CE 3 X X X X X X X X
GX 3 X X X
CE 4 X X X X X X X X
GX 4 X X X
Table 4. ISA Long Face-to-Face Availability by Material
9
Bellows Comparison
Please see the table below for bellow material options. It is important to note the
NPS 3 and NPS 4 GX valves are limited to 20mm travel. In some scenarios this will
restrict balanced or reduced port trim options.
MOC: CE to GX Valves
September 2018 / D352220X012
Typ e
CE 1-4
GX 1-4
Table 5. Bellows Availability
NPS Body Material
Size CF3M WCC CN7M MONEL CW2M LCC
Inconel 625 Inconel 625 Inconel 625 Inconel 625 Inconel 625 -
Hastelloy C Hastelloy C Hastelloy C Hastelloy C Hastelloy C -
SST SST - -
Hastelloy C Hastelloy C - - Hastelloy C
Valve and Actuator Features
The Fisher CE and GX valves share many standard features as described in Table 6
below. One design difference between the CE valve and the GX valve is the bonnet.
The GX bonnet is clamped between the valve body and actuator yoke. This reduces
complexity, size, and weight from the bolted bonnet design of the CE valve.
The GX valve shares a number of parts across valve sizes. These include plug/stem
assemblies, actuator stems, stem connectors, actuator seals and bushings, as well
as packing components for reduced complexity of spare parts inventory.
Tables 6 and 7 showcase the valve features and actuator features, respectively.
Valve CE GX
Body
Plug Design Unbalanced Only – Stem Guided Balanced and Unbalanced – Port Guided
Seat Ring Clamped Threaded
Packing ENVIRO-SEAL™ Optional ENVIRO-SEAL Standard
Cv Capacities See Table 1 See Table 1
Pressure Drop See Table 1 See Table 1
Shutoff Class See Table 2 See Table 2
Flow Direction Up Standard, Down Optional Up
Flow Characteristics Equal Percentage and Linear Equal Percentage and Linear
Trim Materials
316L Standard, Optional Hard Facing,
Temperature Capabilities -196° to 427°C (-325° to 800°F) -196° to 371°C (- 325° to 700°F)
1. 371°C (700°F) is the temperature limit of the Fisher GX ENVIRO-SEAL™ Graphite ULF packing system.
Table 6. Valve Features
CL150, CL300, CL600
ISA Long F-F (See Table 4)
Alloy Matches Body
Hastelloy C
SST
CL150, CL300
ISA Long F-F Option (See Table 4)
316L Standard, Optional Hard Facing,
Alloy Matches Body (CN3MCu/CN7M
Body with N06022 Trim)
(1)
10
Actuator CE (585, 585R, 657, 667) GX
Operating Pressure
Bench Set
Actuator Fail Action Actuator Model Dependent
Instrument Availability Standard Bracket Mount
Cycle Life Spring Selection Specic Tested to 1,000,000 cycles
Table 7. Actuator Features
MOC: CE to GX Valves
September 2018 / D352220X012
0–18
6–30
Higher for 585 Piston Actuators
Requires Spring Selection, Sizing, and
Bench Set
Mounting. Pneumatics Available with
Sizes Actuator Model Specic 2 Sizes (225 & 750)
4 bar (60psi) Standard
3 bar (45psi) Optional
2 bar (30psi) Optional
No Adjustment or Sizing Required
Both Available
Field Reversible
Integral FIELDVUE Instrument
Standard Bracket Mount.
Conclusion
The 1996 obsolescence of the Fisher CE valve ended spare parts availability in
2006. The Fisher GX control valve offers compatible sizes, features, and materials
to cover the wide range of customer application needs and is the recommended
replacement for the Fisher CE control valve. Please contact your Emerson local
business partner or sales ofce for additional details or questions regarding the
Fisher GX control valve.
11
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Additional Resources
GX Instruction Manual (D103175X012)
GX Product Bulletin (D103171X012)
MOC: CE to GX Valves
September 2018 / D352220X012
Visit Fisher.com to
nd an Emerson sales
contact in your area.
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Marshalltown, Iowa 50158 USA
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Cernay, 68700 France
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effort has been made to ensure their accuracy, nothing herein is to be construed as a warranty
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