CONTROL VALVES Guy Borden, Jr., Editor Paul G. Friedman, Style Editor
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2 CONTROL VALVES Guy Borden, Jr., Editor Paul G. Friedman, Style Editor Table of Contents About This Series Acknowledgments Preface About the Volume Editors Contributors iii v xiii xv xvii Chapter 1 Introduction to Control Valves 1 References 12 Chapter 2 The History of Control Valves 15 Acknowledgement 23 References 23 Chapter 3 Terminology 25 Chapter 4 Valve Bodies 73 Part One: Control Valving Terminology Not Included in ISA Standard 25 Part Two: ANSI/ISA S75.05 "Control Valve Terminology" 28 References 72 Globe-Style Bodies 73 Rotary Valves 82 Special-Purpose Valves 91 References 92 Chapter 5 Control Valve Actuators 93 Signals and Power Sources 93 Basic Styles 94 Motion Conversion 100 Linear-to-Rotary Torque/Travel Relationships 100 Power Failure Modes 101 ActuatorNalve Sizing Factors 101 Actuator Accessories 101 References 103
3 Chapter 6 Sizing 105 Required Calculations 105 ANSI/ISA S75.01 Standard "Flow Equations for Sizing Control Valves" 112 References 162 Chapter 7 Cavitation and Flashing 163 Cavitation Fundamentals 164 Cavitation in Valves 170 Testing 178 Cavitation Applications for Control Valves 183 Special Fluid Considerations 208 Flashing 211 Nomenclature and Glossary 216 References 220 Chapter 8 Control Valve Noise 223 Introduction 223 Valve Noise Sources 227 Valve Noise Prediction 233 User Caveat 235 Valve Noise Categories 236 Possible Solutions 237 Conclusion 266 References 266 Chapter 9 Control Valve Trim 269 Selection of Valve Trim Material 269 Characterizing of Valve Plugs or Cage Ports 271 Seat Leakage 273 Soft Seat Trim Design 278 Seating of Rotary Valves 283 Low Flow Trim 285 Trim for Abrasive-Erosive Service 288 Plug Guiding 294 Dynamic Torque of Rotary Valves 301 Bistable Flow and Plug Instability 308 Elastomeric Trim 310 References 310 Chapter 10 Control Valve Features 313 Process Conditions that Influence Valve Design 314 Piping End Loadings that Influence Valve End Connection Design 315 Valve End Connection Concerns 316 Valve End Connection Types 317 Bonnets 327 Fluid Solidification Protection 333
4 Freeze Protection (Cryogenic Service) 335 High Temperature Protection 336 Valve Stem Sealing Features 337 Valve Packing 337 Live Loading 345 Flow Straightening Devices 347 Traps, Strainers and Filters 347 Hydraulic Snubbers 350 Valve Features to Reduce Noise 352 Fire Safe Treatment 356 Fire Safe Pneumatic Actuators with Fusible Elements 357 Evaluating the Need for Bypass and Block Valves 358 Valve Bypasses 359 Chapter 11 Materials for Control Valves 363 Material Properties 363 Environmental Considerations 365 Materials of Construction 380 Materials for Pressure Retaining Parts 382 Coatings 391 Trim Material Selection 393 Valve Packing 401 Gaskets 403 Sealants 405 Paint and External Coatings 406 Trademarks 408 References 408 Chapter 12 Control Valve Applications 411 Chapter 13 Safety 449 The Application Categories 412 Valves in Parallel 423 Valves in Series 432 Frequent Application Problems 434 References 446 Automated Valve Selection 449 On-Off Valves 449 Materials of Construction 450 Valve Piping 451 Valve and Actuator Sizing and Selection 452 Valve Positioners, Transducers, Position Transmitters, and Accessories 453 Valve Failure Modes 456 Other Safety Considerations 458 References 458
5 Chapter 14 Control Valve Selection 459 Safety 461 Process Containment 464 Valve Performance 467 Control Performance 470 Control Valve Design 472 Accessories 476 Specialized Valves 478 Bypass Manifolds 479 Prepare Plans 480 Develop Specifications 482 Putting It All Together 490 References 492 Bibliography 494 Chapter 15 Accessories 495 General Considerations 496 Device Descriptions 499 Device Operation 501 Networked Valves 511 The Future 539 References 540 Chapter 16 Installation 543 Planning 543 Receiving-Inspection 546 Installing in the Piping 547 Paperwork 549 Testing After Installation 551 Type Specifics 553 References 558 Chapter 17 Control Valve Troubleshooting 561 Control Valve Troubleshooting 561 Prevention Rather than Cure 562 Types of Problems Encountered 566 Methods for Analyzing Problems and Diagnosing Potential Causes 567 Functional Problems 567 Operational Problems 574 Use of Diagnostic Tools to Aid in Troubleshooting 582 References 582
6 Chapter 18 Case Histories 585 Specification and Selection 585 Materials 590 Installation and Location 591 Testing 595 Operation and Maintenance 595 External Causes 596 Multiple Problems 599 Stupidity 599 References 599 Chapter 19 Maintenance 601 Philosophy 601 Warranty 601 Planning 602 Safety 602 Instructions 603 Maintenance Choices 604 What Goes Wrong with Control Valves? 606 Alternatives to Repair 614 References 616 Chapter 20 Control Valve Testing 619 Part One: Manufacturer's Testing 619 Less Common Tests 626 Conclusions for Manufacturer's Testing 629 Part Two: Field Testing Of Installed Valves 630 Diagnostic Testing 630 Other Control Valve Tests 649 Motor-Operated Valves: Diagnostic Testing 651 Summary of Post-installation Testing 657 References 658 Chapter 21 Codes and Standards 659 Definitions and Descriptions 659 Subjects of Codes and Standards 663 References 669
7 Chapter 22 Computerized Control Valve Sizing 671 The Development of Valve Sizing Aids 671 Important Features 673 Valve Sizing Worksheets 674 Gas and Vapor Sizing Worksheet 675 Liquid Sizing Worksheet 684 Two-Phase Sizing Worksheet 692 Valve Sizing Procedure 696 References 698 Chapter 23 Everything You Ever Wanted to Know About Regulators 699 Operation 699 Performance 701 Designs 702 Sizing 711 Performance Comparison with Control Valves 711 References 714 Appendix A Units Conversion 717 Appendix B Organizations That Sponsor Codes, Standards and Recommended Practices 719 Appendix C Bibliography of Control Valve Standards 725 Index 735 ISA 725 EC 727 ASME 729 API 729 ASTM 730 FCI 731 IEEE 731 ISO 731 MSS 732 UL 733 Miscellaneous 734
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Product Bulletins This portion of the Fisher Controls Valve and Actuator Catalogs CD-ROM contains Instrument, Valve, and Actuator Bulletins. Refer to the following files: Valve and Actuator Bulletins Catalog
BOSS Series D Control Valve
Applications Process control systems for food, pulp and paper, chemical, petrochemical & other industries HVAC systems Feed water and fuel system controls in boiler rooms Packaged systems (OEM) such as