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Control Valve Types

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Setpoint Integrated Solutions is an industry leader in applying Control Valve solutions across industry segments.

Brannon Gant - Regional Sales Manager

Published in: Engineering
  • thank you sir. but what is a port guided globe valve?how the plug is guided by the port?
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Control Valve Types

  1. 1. WHEN ACCURACY MATTERS IntroductionIntroduction toto Control Valve TypesControl Valve Types
  2. 2. WHEN ACCURACY MATTERS • IEC Definition: A power operated device which changes the fluid flow rate in a process control system. It consists of a valve connected to an actuator that is capable of changing the position of the closure member in the valve in response to a signal from the system • ISA Definition: A power operated device which modifies the fluid rate in a process control system. It consists of a valve connected to an actuator mechanism that is capable of changing the position of a flow controlling element in the valve in response to a signal from the controlling system. Control Valve DefinitionControl Valve Definition
  3. 3. WHEN ACCURACY MATTERS 5050 PSIGPSIG TANKTANK PC Supply Steam P1 = 75-100 psig Positioner Analog Electro-Pneumatic Control Signal 4-20mA Process Variable 4-20mA Where does a CV fit in the Control SystemWhere does a CV fit in the Control System
  4. 4. WHEN ACCURACY MATTERS • Feature – Ruggedly built for high cycle service – Always provides tight shutoff – Valve bore approximates line size – Always provide system effect with travel change – Used to alter flow in response to control signal – “Absorbs "large amount of energy • On-Off Valve – No – Yes – Yes – No – No – No • Control Valve – Yes – No – No – Yes – Yes – Yes Control Valve vs On/Off ValveControl Valve vs On/Off Valve
  5. 5. WHEN ACCURACY MATTERS Typical Isolation ValvesTypical Isolation Valves HP Butterfly Full Port Ball Sleeve Lined Plug Manual Globe Manual Gate
  6. 6. WHEN ACCURACY MATTERS Control Valve HierarchyControl Valve Hierarchy Pressure Drop HPBV Ball Rotary Globe Globe Severe Duty
  7. 7. WHEN ACCURACY MATTERS Control Valve TypesControl Valve Types • Reciprocating – Globe – Angle – Severe Service • Rotary – Butterfly – Ball – Rotary Globe
  8. 8. WHEN ACCURACY MATTERS Basic Butterfly ValvesBasic Butterfly Valves Poor Control Valve
  9. 9. WHEN ACCURACY MATTERS High Performance Butterfly ValvesHigh Performance Butterfly Valves Better Control
  10. 10. WHEN ACCURACY MATTERS Types of Butterfly ValvesTypes of Butterfly Valves Concentric Centerline Single Offset (Eccentric) Double Offset (HPBV) 2 1 2 1 3 Tripple Offset
  11. 11. WHEN ACCURACY MATTERS Ball ValvesBall Valves
  12. 12. WHEN ACCURACY MATTERS Segmented BallSegmented Ball Control ValveControl Valve Un-Restricted Flow Path Un-Restricted Flow Path Partially Open
  13. 13. WHEN ACCURACY MATTERS Segmented Ball ValvesSegmented Ball Valves • Partial Ball – 90 Deg. Rotation • High Capacity & High Turndown • Characterized Segmented Ball • Single Metal or Soft Seat Notice the Single Clamped Seat Notice the Characterization
  14. 14. WHEN ACCURACY MATTERS Eccentric Rotary GlobeEccentric Rotary Globe
  15. 15. WHEN ACCURACY MATTERS CAMFLEX AnimationCAMFLEX Animation
  16. 16. WHEN ACCURACY MATTERS Reciprocating Control ValvesReciprocating Control Valves
  17. 17. WHEN ACCURACY MATTERS Single Port UnbalancedSingle Port Unbalanced • Globe Valve • Unbalanced Design • Post Guided • Lo-dB Trim • Class-IV & Class-V Shut- Off • Flow To Open • Flow To Close
  18. 18. WHEN ACCURACY MATTERS LEAKAGE CLASSESLEAKAGE CLASSES • CL IV, Standard – .01% of Rated Cv • CL V, Optional – Reduced Pressure Drop Capability Due to Higher Seat Loads Required • CL VI, Optional – Plug with PTFE Seal Ring
  19. 19. WHEN ACCURACY MATTERS QUICK CHANGE TRIMQUICK CHANGE TRIM • Maintenance Advantage • Seat Ring Held in Place by the Seat Ring Retainer (A Type of Cage) • Seat Ring Gasket Required
  20. 20. WHEN ACCURACY MATTERS TRIM TYPESTRIM TYPES • Contoured Trim – Full Area – Reduced Area • Single Stage Lo-dB and Anti-Cavitation • Two-Stage Lo-dB and Anti-Cavitation
  21. 21. WHEN ACCURACY MATTERS LOW NOISE PRODUCTSLOW NOISE PRODUCTS • LO-DB Trim Reduces the Sound Level up to 15 dBA Over Conventional Trim, Depending on the P1 /P2 Ratio. SINGLE-STAGE Lo-dB TRIM
  22. 22. WHEN ACCURACY MATTERS Angle Single Port UnbalancedAngle Single Port Unbalanced
  23. 23. WHEN ACCURACY MATTERS Venturi Seat RingVenturi Seat Ring Extreme Conditions High Pressure Drops Sever Coking Conditions Flashing Liquids Emergence Blow Down
  24. 24. WHEN ACCURACY MATTERS Single Port BalancedSingle Port Balanced • Globe Valve • Fully-Balanced Design • Cage Guided • Composite Polymer Balancing Seal • Class-V Shut-Off • Flow To Open
  25. 25. WHEN ACCURACY MATTERS Single Port BalancedSingle Port Balanced
  26. 26. WHEN ACCURACY MATTERS CAGE GUIDED VALVESCAGE GUIDED VALVES • The cage provides positive alignment and control of the plug • The cage can modify or “characterize” the flow The Cage Serves Two Major Functions
  27. 27. WHEN ACCURACY MATTERS CAGE GUIDED - PRESSURE BALANCEDCAGE GUIDED - PRESSURE BALANCED TYPICAL APPLICATIONS • Clean Process Fluids • High Pressure, High Temperature, Noise, and Cavitation LIMITATIONS • Slurries or Gritty or Dirty Processes • Less Capacity Compared to Rotary Valves • Larger and Heavier than Most Rotary Valves
  28. 28. WHEN ACCURACY MATTERS CAGECAGE • Acts as Sealing Surface for Plug Seal Ring • Retains Seat Ring • Provides Throttling Orifice • Guiding Surface
  29. 29. WHEN ACCURACY MATTERS SEAL RINGSSEAL RINGS • Metal Seal Ring – Class II – Temp: -320o F to 650o F • PTFE Seal with Backup – Meets Class IV Seat Leakage – Temp: -20o F to 300o F • Graphite Seal Ring – Meets Class IV Seat Leakage – Temp: -320o F to 1050o F
  30. 30. WHEN ACCURACY MATTERS Pressure Energized Seal RingPressure Energized Seal Ring • Pressure Energized PTFE Plug Seal • Class V Leakage • Max Temp: 450o F (600o F) • Uni-Directional • Higher Shutoff Capability
  31. 31. WHEN ACCURACY MATTERS AUXILIARY PLUGAUXILIARY PLUG • Flow-To-Close Direction Only – Approx. 10 dB Less Attenuation Than F-T-O • Tight Shutoff at High Temperature • Class IV, Class V Leakage • “Dead” Travel in Closed Position = 0.050”
  32. 32. WHEN ACCURACY MATTERS AUXILIARY PLUGAUXILIARY PLUG • Cage Guided • Balanced • Single Seated • Captured Seat Ring (QC) • Pilot Trim Stem Packing Ring (S) Cage Balancing Seal Packing Follower Auxiliary Pilot Plug Body Seat Ring Guide Bushing Plug (Main) Bonnet
  33. 33. WHEN ACCURACY MATTERS Double Port (Semi Balanced)Double Port (Semi Balanced)
  34. 34. WHEN ACCURACY MATTERS 3-Way3-Way
  35. 35. WHEN ACCURACY MATTERS 80000 Series 3 Way80000 Series 3 Way 80000 Series 3 Way DivertingCombining
  36. 36. WHEN ACCURACY MATTERS Bellows SealBellows Seal
  37. 37. WHEN ACCURACY MATTERS Low / Micro FlowLow / Micro Flow
  38. 38. WHEN ACCURACY MATTERS End ConnectionsEnd Connections Raised Face (RF)
  39. 39. WHEN ACCURACY MATTERS End ConnectionsEnd Connections Weld Prep Butt Weld
  40. 40. WHEN ACCURACY MATTERS End ConnectionsEnd Connections Socket Weld
  41. 41. WHEN ACCURACY MATTERS End ConnectionsEnd Connections Ring Type Joint (RTJ)
  42. 42. WHEN ACCURACY MATTERS End ConnectionsEnd Connections Clamp Connection (Graylok,ReFlange)
  43. 43. WHEN ACCURACY MATTERS End ConnectionsEnd Connections Threaded (NPT,MS)
  44. 44. WHEN ACCURACY MATTERS Flangeless End ConnectionsEnd Connections
  45. 45. WHEN ACCURACY MATTERS End ConnectionsEnd Connections Separable Flange
  46. 46. WHEN ACCURACY MATTERS Questions?Questions?

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