Management of Change Guide: Replacement of Fisher POSI-SEAL A11 Valve with Fisher 8532 High-Performance Butterfly Valve
Fisher Management of Change Guide: Replacement of Fisher POSI-SEAL A11 Valve with Fisher 8532 High-Performance Butterfly Valve Manuals & Guides
Management of Change Guide
Replacement of Fisher™ POSI-SEAL™ A11
Valve with Fisher 8532 High-Performance
Buttery Valve
Table of Contents
Management of Change ..................................2
Background ....................................................2
Question & Answer Checklist ..........................2
August 2018
D352790X012
A11 and 8532 Valve Comparison .....................4
Scope, Size, Class ................................................................ 4
Capacities (Cv) .................................................................... 4
Actuator Sizing (Torque) ..................................................... 4
Dimensions ........................................................................ 4
Spare Parts ......................................................................... 5
Conclusion ......................................................5
Additional Resources ......................................5
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 8532 valve is now available in size NPS 30, 36, 42, and 48. These new
sizes of 8532 valve can fully replace the soon to be obsolete Fisher POSI-SEAL
A11 valve NPS 30-48 Class 150/150, 150. This is part of a continuing effort to
consolidate the Fisher High-Performance Buttery Valve (HPBV) product offering.
The NPS 30-48 8532 valve has been developed with the same features and options
as the NPS 14-24 range of 8532 valves. The 8532 valve congured with keyed
shafts will perform and install the same as the A11 valve, and it may be used in the
same applications.
MOC: A11 to 8532 Valve
August 2018
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For more information regarding Fisher valves, contact your local Emerson sales ofce.
Question & Answer Checklist
Q: Does the proposed modication cause any changes to the piping and
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instrumentation diagram (P&ID)?
A: No.
Q: Does the proposed modication change process chemistry,
technology, or operating and control philosophies?
A: No.
Q: Does the proposed modication change how the existing plant is
operated?
A: No.
Q: Does the proposed modication change process ows?
A: No.
Q: Does the proposed modication change existing pressure relief cases?
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A: No.
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Q: Does the proposed modication change the process description?
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A: No.
Q: Have the codes and standards to which the new equipment was
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designed changed?
A: No. However, they may have been updated since installation.
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.
MOC: A11 to 8532 Valve
August 2018
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Q: Does the proposed modication change existing operator training
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requirements?
A: No.
Q: Does the proposed modication introduce new equipment items
that require spare parts, training manuals, maintenance procedures
or training to teach the maintenance department how to maintain
them?
A: No.
Q: Does the proposed modication introduce new equipment items that
require spares or obsolete spares for existing equipment?
A: Packing parts will be different.
Q: Does the proposed modication permanently remove the spares for
existing pieces of equipment?
A: Packing parts will be different.
Q: Does the proposed modication change the inspection scope or
inspection interval?
A: No.
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Q: Does the proposed modication require welding work to be
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performed?
A: No.
Q: Have the materials of construction been reviewed to ensure that the
metallurgy is correct?
A: Yes. The 8532 is available in the same materials of construction as the
A11.
POSI-SEAL A11 and 8532 Valve Comparison
The following sections are intended to provide a nominal comparison between the
Fisher POSI-SEAL 11 valve and the Fisher 8532 valve.
MOC: A11 to 8532 Valve
August 2018
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Scope, Size, Class
Sizes NPS 30-48 CL150/150, 150, and 300 of the A11 valve will be made obsolete
and replaced with the 8532 valves in equivalent size and class.
Capacities (Cv)
The ow capacity of the NPS 30-48 8532 valve is the same as the A11 valve.
Actuator Sizing (Torque)
The actuator sizing for the 8532 valve is the same as the A11 valve. The sizing
coefcients, breakout torque, and dynamic torque are also the same.
Dimensions
The NPS 30-48 8532 valve has the same face-face and actuator mounting
dimensions as the A11 valve.
Spare Parts
The A11 valve and 8532 valve use many of the same trim parts, including seals,
gaskets, and bearings. The 8532 valve is available with both standard and
ENVIRO-SEAL packing. The packing parts of the NPS30-48 8532 and A11 valves
are not interchangeable.
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on dark backgroundson light backgrounds
standard
no gradients
watermark
stacked logo (for sharing only)
standard
no gradients
watermark
stacked logo (for sharing only)
Conclusion
Emerson now offers the Fisher 8532 in NPS 30-48 as a replacement for the obsolete
Fisher POSI-SEAL A11 valve (NPS 30-48). With this change, Emerson offers a
simplied line of Fisher buttery valves, while maintaining full application coverage.
Please contact your local Emerson business partner or sales ofce for additional
details or questions regarding the Fisher 8532 valve.
Additional Resources
8532 Instruction Manual
8532 Product Bulletin
8532 Product Webpage
MOC: A11 to 8532 Valve
August 2018
D352790X012
Visit Fisher.com to
nd an Emerson sales
contact in your area.
http://www.Facebook.com/FisherValves
http://www.Twitter.com/FisherValves
Emerson Automation Solutions
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore
http://www.YouTube.com/user/FisherControlValve
http://www.LinkedIn.com/groups/Fisher-3941826
© 2018 Fisher Controls International LLC. All rights reserved.
Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit
of Emerson Electric Co. Emerson and the Emerson logo are trademarks and service marks of Emerson
Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every
effort has been made to ensure their accuracy, nothing herein is to be construed as a warranty
or guarantee, express or implied, regarding the products or services described herein or their
use, performance, merchantability or tness for a particular purpose. Individual results may vary.
All sales are governed by our terms and conditions, which are available upon request. We reserve
the right to modify or improve the designs or specications of our products at any time without
notice. Responsibility for proper selection, use and maintenance of any product or service remains
solely with the purchaser and end user.
on dark backgroundson light backgrounds
standard
no gradients
watermark
stacked logo (for sharing only)
standard
no gradients
watermark
stacked logo (for sharing only)
MOC: A11 to 8532 Valve
August 2018
D352790X012
Visit Fisher.com to
nd an Emerson sales
contact in your area.
http://www.Facebook.com/FisherValves
http://www.Twitter.com/FisherValves
Emerson Automation Solutions
Marshalltown, Iowa 50158 USA
Sorocaba, 18087 Brazil
Cernay, 68700 France
Dubai, United Arab Emirates
Singapore 128461 Singapore
http://www.YouTube.com/user/FisherControlValve
http://www.LinkedIn.com/groups/Fisher-3941826
© 2018 Fisher Controls International LLC. All rights reserved.
Fisher is a mark owned by one of the companies in the Emerson Automation Solutions business unit
of Emerson Electric Co. Emerson and the Emerson logo are trademarks and service marks of Emerson
Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every
effort has been made to ensure their accuracy, nothing herein is to be construed as a warranty
or guarantee, express or implied, regarding the products or services described herein or their
use, performance, merchantability or tness for a particular purpose. Individual results may vary.
All sales are governed by our terms and conditions, which are available upon request. We reserve
the right to modify or improve the designs or specications of our products at any time without
notice. Responsibility for proper selection, use and maintenance of any product or service remains
solely with the purchaser and end user.
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