Fisher easy-e Control Valve NPS 12 through 24x20

Transcription

1 Management of Change Guide Fisher easy-e Control Valve NPS 12 through 24x20 Table of Contents Management of Change...2 Background...2 Question & Answer Checklist...2 Comparison of EU/EW to easy-e Valves...6 Nomenclature... 6 Materials of Construction and Features... 6 Conclusion...9 Additional Resources...10

2 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 efficiency. 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 Fisher easy-e brand control valves are found in almost every industry and have 40- plus years of service history. Fisher easy-e ED/EWD and ET/EWT valves are available in sizes ranging from NPS 1 through 12x8, while larger sizes of NPS 12 through 24x20 are available in the EU/EW family of valves. Emerson Process Management has moved these larger size valves under the easy-e brand and has adjusted the offering to better suit customers needs. The larger sizes will now be known as easy-e valves. The purpose of this guide is to simplify the transition from existing EU/EW valves to new easy-e valves. Contained in this guide are two sections, the first contains questions and answers and the second compares easy-e valves to EU/EW valves. The first section helps users complete management of change (MOC) approval documents when upgrading to easy-e valves. The second section helps users better understand the differences and similarities between the EU/EW valves and easy-e valves. This section also demonstrates how it is much easier to work with easy-e valves and how they have been optimized to fit more applications. Question & Answer Checklist 1 Q: Does the proposed modification cause any changes to the piping and instrumentation diagram (P&ID)? A: Yes. The NPS 20x16 short neck easy-e valve is 58.7 mm (2.31 inches) taller in height when compared to currently installed NPS 20x16 short neck EU/EW valves. The term short neck refers to the height of the neck of the valve and is dictated by valve travel. For the NPS 20x16 valve, short neck includes valve travels up to and including 203 mm (8 inches). 2 Q: Does the proposed modification change process chemistry, technology, or operating and control philosophies? 3 Q: Does the proposed modification change how the existing plant is operated? 2

3 4 Q: Does the proposed modification change process flows? 5 Q: Does the proposed modification change existing pressure relief cases? A: Yes. Flow capacities have been increased and lowered for some valve constructions which may impact pressure relief systems depending on plant/process design. Flow capacities for easy-e valves are published by Emerson Process Management in Fisher Catalog 12 Section 1, which is available from your local Emerson Process Management sales office. 6 Q: Does the proposed modification change the process description? 7 Q: Have the codes and standards to which the new equipment was designed changed? 8 Q: Does the proposed modification change the materials of construction, such as a change in material form (cast, forged, or alloy)? A: Yes. Valve trim (plug, seat ring, cage, and other process wetted parts) materials have been changed and assigned new trim designations. Trim materials for easy-e valves are published by Emerson Process Management in the Fisher Large ED/EWD and ET/EWT Valves Product Bulletin (D103554X012). In addition, the availability of valve-to-bonnet bolting materials for CF8M valve body material constructions has been changed. Both SA- 193-B7 stud and SA-194-2H nut body-to-bonnet bolting and SA-193- B8M stud and SA-194-8M nut valve-to-bonnet bolting were previously available for all EU/EW valve constructions having CF8M valve body material. For easy-e valves having CF8M valve body material SA- 193-B7 stud and SA-194-2H nut bolting is not available. For easy-e valves having CF8M valve body material SA-193-B8M stud and SA M nut bolting is not available in CL600 NPS 16, 20x16 and 24x16 valves, and all NPS 20 and 24x20 valves. Fisher easy-e valves offer an additional bolting material to fill this gap, which is SA-453 Gr 660A studs and nuts. 9 Q: Does the proposed modification introduce new equipment items that require periodic predictive maintenance? The new equipment items will require the same periodic maintenance as required by the previous equipment items. 3

4 10 Q: Does the proposed modification change existing operator training requirements? 11 Q: Does the proposed modification introduce new equipment items that require spare parts, training manuals, maintenance procedures or training to teach the maintenance department how to maintain them? Maintenance procedures will be the same as those for EU/ EW valves and no additional training or training materials will be necessary. Documentation for training/maintenance can be obtained by contacting your Emerson Process Management local business partner or sales office. 12 Q: Does the proposed modification introduce new equipment items that require spares or obsolete spares for existing equipment? A: New spares will be introduced for easy-e valves. These new spares, may or may not be compatible with existing EU/EW valves. Please contact your Emerson Process Management sales office for further investigation into compatibility of spares across equipment. Spares for existing EU/EW valves will be available for a period of 10 years from the date of manufacture of the original valve. After this period, spares will no longer be available. 4

5 13 Q: Does the proposed modification permanently remove the spares for existing pieces of equipment? A: Yes. Valve trim (plug, seat ring, cage, and other process wetted parts) materials have been changed and assigned new trim designations. These material changes have resulted in changes in operating temperature limits in some constructions. Trim materials and temperature limits for easy-e valves are published by Emerson Process Management in the Fisher Large ED/EWD and ET/EWT Valves Product Bulletin (D103554X012). Flanged end connection valve body maximum temperature limits have been reduced for WCC, WC9, and CF8M materials as described in the table below. Body Material End Connection Maximum Design Temperature EU/EW Valve easy-e Valve C F C F WCC WC9 Raised Face (RF) or Ring Type Joint (RTJ) CF8M When comparing easy-e to EU/EW valves the SA-193-B8M Class 2 stud and SA-194-8M nut valve-to-bonnet bolting temperature limit for CL150 and CL300 NPS 16, 20x16, and 24x16 valves has been reduced to a maximum design temperature of 121 C (250 F). EU/EW valves previously utilized this bolting material up to a maximum design temperature of 427 C (800 F) in CF8M material valves. Fisher easy-e valves offer an additional bolting material to fill this gap, which is SA- 453 Gr 660A studs and nuts. Flow capacities have been increased and lowered for some valve constructions. Flow capacities for easy-e valves are published by Emerson Process Management in Fisher Catalog 12 Section 1, which is available from your local Emerson Process Management sales office. 14 Q: Does the proposed modification change the inspection scope or inspection interval? 5

6 Comparison of EU/EW to easy-e Valves Fisher easy-e valves are essentially the same as EU/EW valves, but with a few enhancements and additions. Travels and features were consolidated so that inventories could be effectively created and managed for these valves and their spare parts. This will help to lower lead times in ordering replacements. In addition, the maximum temperature limit was increased in the ET/EWT easy-e valve (previously EUT-2/EWT-2) from 232 C (450 F) to 316 C (600 F) to cover a broader range of temperatures. The following subsections will compare the two types of product lines in the three major areas of nomenclature, materials of construction, and features.. Nomenclature The goal of introducing easy-e valves is to reduce complexity and make ordering easier, when compared to EU/EW valves. The official name of EU/EW valves is now the easy-e. A summary of nomenclature changes is listed below. Previous Name (EU/EW) EUD EWD EUT EUT-2 EUT-C EWT EWT-2 EWT-C Table 1. New Naming Conventions New Name (easy-e) ED EWD ET ET ET-C EWT EWT EWT-C Materials of Construction and Features Materials of construction for easy-e valves are published by Emerson Process Management in the Fisher Large ED/EWD and ET/EWT Valves Product Bulletin (D103554X012). Some materials have been added and some removed to better suit customers needs when compared to EU/EW valves. The following table provides a comparison of materials for each part between the EU/EW and easy-e valves. 6

7 Part Valve Body and Bonnet Valve Plug Seat Ring Seat Ring Cap Screws Cage Piston Ring EU/EW Valve WCC WC9 CF8M LCC CA6NM HT WC9 with Co-Cr-A CF8M with CoCr-A CB7CU-1 H1075 CF8M with CoCr-A S17400 N07718 CB7CU-1 H1075 WC9 Nitrided CF8M ENC CF8M Chrome Coated S41000 ENC/R L ENC/R31233 Graphite (Fisher Designation FMS17F27) Graphite (Fisher Designation FMS17F39) Material easy-e Valve WCC WC9 CF8M LCC C12A CD3MN CD3MWCuN CA6NM HT WC9 with CoCr-A CF8M with CoCr-A F91 with CoCr-A 2205 Duplex with R Super-Duplex with R SST H SST with CoCr-A 316 SST 2.25 Cr - 1 Mo with CoCr-A 9 Cr - 1 Mo - V with CoCr-A 2205 Duplex with CoCr-A 2507 Super-Duplex with CoCr-A N SST H Cr - 1 Mo Nitrided 316 SST Chrome-Coated S41000 ENC/R31233 S31603 ENC/R SST Chrome-Plated 9 Cr - 1 Mo - V Nitrided 17-4 SST DBL H Duplex Chrome-Plated 2507 Super-Duplex Chrome-Plated Graphite (Fisher Designation FMS17F39) Bore Seal N07718 N07718 Seal Ring Backup Ring Glass and Moly-Filled PTFE with N10276 spring PTFE/graphite with N10276 spring S41000 Glass and Moly-Filled PTFE with N10276 spring PTFE/graphite with R30003 spring S

8 Part EU/EW Valve Material easy-e Valve Retaining Ring 18-8 Stainless Steel 18-8 Stainless Steel N07750 Anti-extrusion Ring PEEK (poly ether ether ketone) PEEK (poly ether ether ketone) Valve Stem S20910 S20910 Gaskets N06600/Graphite N06600/Graphite Valve-to- Bonnet Bolting WCC Valve LCC Valve WC9 Valve CF8M Valve Packing Flange Packing Flange Bolting Packing Follower, Spring, and Lantern Ring Packing Box Ring SA-193-B8M Class 2 Studs, SA-194-8M Nuts SA-479 S20910 Chrome Coat Studs, SA-479 S20910 Nuts Steel SA-193-B8M Studs, SA-194-8M Nuts S17400 SA-193-B7M Studs, SA-194-2HM Nuts SA-193-B7M Studs, SA-194-2HM Nuts SA-193-B16 Studs, SA Nuts N07718 HT Studs, N07718 HT Chrome Coat Nuts SA-193-B8M Class 2 Studs 1, SA-194-8M Nuts 1 SA-479 S20910 Chrome Coat Studs, SA-479 S20910 Nuts SA-453 Gr 660A Studs, SA-453 Gr 660A Nuts SA-193-B8M Studs, SA-194-8M Nuts 1. Available for CL NPS 12 and 16x12 valves and CL NPS 16, 20x16, and 24x16 valves. Not available for CL600 NPS 16, 20x16, and 24x16 valves, and all NPS 20 and 24x20 valves. The previous higher temperature limit that came standard with the EUT/EWT is now an option in the easy-e ET/EWT valve. In more detail, the EUT/EWT construction used a seat ring that is bolted into the valve body to extend the service temperature limit above 232 C (450 F). The new easy-e construction is able to utilize the same threaded-to-cage seat ring as the ET/EWT with a new High Temperature Seal (HTS1) option featuring PEEK anti-extrusion rings to extend the service temperature limit above 232 C (450 F). 8

9 The following table provides a list of major features that were available with EU/EW valves, but not available with easy-e valves. Also included in this table is a suggested alternative to each feature. EU/EW Feature Affected Size(s), NPS Alternative easy-e Feature Whisper Trim III level D1 trim All Whisper Trim III level D3 trim 5 travel standard cages used for linear and equal percentage trims Drilled-window cages used for linear and equal percentage trims All All 4 or 5-1/2 travel Cast-window cages 8 7/8 travel 16x12 8 travel 14 port diameter 17 port diameter 10 7/8 and 14 7/8 travel standard cages used for linear and equal percentage trims 14 7/8 and 16 7/8 travel standard cages used for linear and equal percentage trims 12 7/8 and 13 7/8 travel Whisper Trim III cages 16 20x16 24x x port diameter port diameter 20 8 travel 24x20 8 travel /8 travel 8 travel WhisperFlo cages 20 24x /8 travel 16 7/8 travel Cavitrol III cages 24x /8 travel Conclusion The elimination of EU/EW valves and the introduction of easy-e valves will not affect EU/EW valves currently installed in plants, with the exception of ordering spare parts. Spares for existing EU/EW valves will be available for a period of 10 years from the date of manufacture; however, some spares for easy-e valves will be compatible with EU/EW valves, while some will not. Fisher easy-e valves are available in several new sizes, features, and materials, in addition to the previous EU/EW valve offerings to cover a wide range of customer application needs. In summary, easy-e valves are easier to order and cover a wider range of applications. 9

10 Additional Resources Product Bulletin (D103554X012) bulletins/d103554x012.pdf Instruction Manual (D103553X012) instruction_manuals/d103553x012.pdf easy-e Sliding-Stem Control Valves Brochure (D350365X012) brochures/d350365x012.pdf stacked logo (f To find the Emerson sales contact in your area, scan or click the QR code Fisher Controls International LLC. All rights reserved. Fisher and FIELDVUE are marks owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co. Emerson Process Management, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners. Emerson Process Management Marshalltown, Iowa USA Sorocaba, Brazil Cernay, France Dubai, United Arab Emirates Singapore Singapore 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 fitness 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 specifications 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.