Guide: Management of Change-Replacement of Fisher D2 FloPro Control Valves with Fisher D2T FloPro Control Valves
Table of contents
Loading...Fisher Guide: Management of Change-Replacement of Fisher D2 FloPro Control Valves with Fisher D2T FloPro Control Valves Manuals & Guides
Management of Change Guide
September 2018
D352330X012
Replacement of Fisher™ D2 FloPro Control
Valves with Fisher D2T FloPro Control Valves
Table of Contents
Management of Change ..................................2
Background ....................................................2
Question & Answer Checklist ..........................2
D2 FloPro and D2T FloPro Control Valve
Comparison ....................................................4
Congurable Body .............................................................. 4
Capacities (Cv) .................................................................... 4
Dimensions ........................................................................ 5
Approximate Control Valve Assembly Weights .................... 5
Conclusion ......................................................5
Additional Resources ......................................6
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 D2 FloPro control valve is a compact, rugged valve designed for on/off
control. This valve is ideal for use as a dump valve on gas separators and scrubbers.
It is also well-suited for other high pressure applications in natural gas production,
compression, and processing. The D2 FloPro valve has threaded end connections
and is available in an NPS 1 globe style valve body specied for ASME B16.34 CL900
service. Fisher D2 FloPro valves are obsolete, effective September 2014, and have
transitioned to D2T FloPro valves.
MOC: D2 to D2T FloPro Valve
September 2018
D352330X012
The Fisher D2T FloPro control valve is an end user-congurable globe or angle valve
that offers additional installation exibility over the D2 FloPro control valve. This
exibility, paired with the design features of the D2 FloPro, creates a control valve
that can be utilized in a variety of applications in the oil and gas industry.
For more information regarding other Fisher oil & gas products, please 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: Possibly, depending on valve conguration—angle or globe.
Globe valve conguration would not change P&ID, but an angle
conguration would require modication to the P&ID.
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, valve capacity does not change.
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