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Severe Service Metal Seated Ball Valves “ Taking Sealing to its Practical Limits”

Severe Service Technology, Inc . SST. Severe Service Metal Seated Ball Valves “ Taking Sealing to its Practical Limits”. Severe Service Technology, Inc. Incorporated in 1994 Over 15,000 valves shipped Total Turnkey Operations Corporate and Design Offices: Houston, TX

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Severe Service Metal Seated Ball Valves “ Taking Sealing to its Practical Limits”

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  1. Severe Service Technology, Inc. SST Severe Service Metal Seated Ball Valves “Taking Sealing to its Practical Limits”

  2. Severe Service Technology, Inc. • Incorporated in 1994 • Over 15,000 valves shipped • Total Turnkey Operations • Corporate and Design Offices: Houston, TX • Manufacturing, Assembly & Test: Monterrey, Mexico • Industries: • Power Generation • Refining • Chemical • Mining • Paper

  3. FEA • Deflection Analysis • Stress Analysis • Thermal Analysis Design – Computer Optimized All Designs via SOLIDWORKS Simulation

  4. Plant: Monterrey, Mexico

  5. What are Severe Service Valves? • Metal Seated Valves with Special Coatings on Sealing Surfaces • Zero Leakage per MSS-SP-61 • High Pressure and Temperature applications (ASME Class 1500 to 4500)

  6. Valves for Power Generation Plants

  7. Customers & EPC’s • AEP • Allegheny Power • Basin Electric Power • ENTERGY • Florida Power & Light • Gainesville Regional Utilities • Indianapolis Power & Light • Foster Wheeler • Minnkota Power Cooperation • Northern States Power / XCEL • Babcock Power • Vogt Power • Alliant Energy • American Electric • Associated Electric • Dairyland Electric Coop • Florida Power & Light • Invenergy • Southern Cal Edison • U.S. Generating • West Texas Utilities • Houston Lighting & Power • Detroit Edison • Consumers Power • Black & Veatch • Duke Power • Bibb Engineering • Alstom • TVA • WE Energies • Kansas City Power & Light • Mid American Energy • Omaha Public Power • Progress Energy • Portland General Electric • Nebraska Public Power

  8. Ball vs. Globe Valves • Globe valve discs and seats are subjected to erosion and seat wear due to their location within the body and flow path • Ball valves are position seated and utilize system pressure to seal • Ball valves eliminate the need or use of external handle forces (i.e., cheater bar) to apply additional torque to close valve and the potential to deform seating surfaces, which results in seat leakage. • Ballvalves are fast and easier to manual operate than Globe Valves Ball Valve Globe Valve

  9. SSV - Product Overview • Sizes: 1/2 to 2-1/2” (one-piece body) • ASME Class: 1500, 3200 and 4500 • End Connections: Socketweld & Buttweld • Bore: Reduced • Sealing: Uni-directional • Actuation: Lever, Gear, Electric and Pneumatic

  10. SSV: Standard Materials

  11. SSV: General Design Flow

  12. SSV: Design ISO Mounding Pad 1 Piece Body

  13. SSV: Trim/Internals Stem Live Loaded Packing Gland Push Ring Downstream Seat Spring Transition Piece Retaining Ring Ball

  14. Sealing Surfaces – Hardness Typically harder mating/sealing surfaces will perform better and last longer. Many Globe valves use Stellite (solid or coating) for valve seats and discs. SST applies Chromium Carbide utilizing the HVOF process.

  15. High-Tech Coatings • High Velocity Oxygen Fueled • (HVOF) process; using oxygen, hydrogen and Chromium Carbide powder applied at MACH 5 • Coatings are applied in-house

  16. Coated and Mate-Lapped Parts Downstream Seat Ball Push Ring

  17. Applications: Power Generation

  18. Applications: Power Generation • Feedwater Drains • Gauge Glass Drain and Isolation • Boiler/Reheat/Superheat Drain, Vents and Root • Economizer Stop • Flash Tank • HP Feedwater System • IP Heater Applications • Blowdown • Condensate Drain • Mud Drum Drain • Steam Trap Isolation • Sootblower System • Inert Steam System • HP Turbine Steam Supply & Extraction • Emergency Relief Valve (SSI) • Superheater Startup Vent Valve (SVV)

  19. Applications: Pulp & Paper • Digester Blowdown Valves • Green Liquor Valves • Black Liquor Valves • Steam Drain & Vent Valves

  20. New Products SST

  21. Model SVVSuperheater Startup Vent Valve (Sky Vent) Manual Valve (normally open) Pneumatic Valve (normally closed)

  22. Model SVVSuperheaterStartupVentValve Description and Application: The Superheater Startup Vent Valve is open during boiler startup, up to 30% boiler capacity. Valve is used to vent low temperature and pressure saturated steam. During initial operation of a HRSG or Boiler, bypassing main steam around the steam turbine to the atmosphere so the unit does not come up to temperature too quickly.

  23. Model SVVSuperheater Startup Vent Valve Upstream Seat Stem Downstream Seat Spring Seat Landing Ball

  24. Model SVVSuperheater Startup VentValve • Sizes, Bore and Overall Length designed to meet customer requirements • Body Material: F22/F91 Chrome Moly • Trim Material: 410 Stainless Steel or Inconel 718 with Chromium Carbide coating

  25. Model SSIERV/PORV IsolationValve ERV / PORV Ball Valve (supplied by others) Main Steam Relief Valve Model SSI Isolation Valve Main Steam Line

  26. Model SSIERV/PORV IsolationValve Description and Application: Model SSI is the Isolation Valve installed under the ERV or PORV. The SSI is normally open and is used when maintenance is required on the ERV or PORV. ERV or PORV (supplied by others) is a pneumatic actuated pressure relieving valve. Their purpose is to prevent or reduce the number of lifts of the Main Steam Safety Valve, thus extending their life. Installed in conjunction with automated or electronic controls for control of boiler capacity or overprotection of the boiler.

  27. Model SSI (SSG-1) Live Loaded Packing ISO Standard actuator bolt pattern for easy automation Body End Adapter Body Gasket

  28. SSG-1 Trim Seat Landing Upstream Seat Downstream Seat Spring Inner Collar Ball

  29. Model SSIERV/PORV IsolationValve • Sizes: Up to 2-1/2” • Class: Up to 4500 • Bore: Full and Reduced* • Body Material: F22/F91 Chrome Moly • Trim Material: 410 Stainless Steel with Chromium Carbide Coating * Per Customer’s requirement

  30. Applicable Codes and StandardsDesigned, Manufactured & Tested • MSS-SP 61: “Pressure Testing of Steel Valves” • ASME B16.34: “Valves – Flanged, Threaded and Welding End” • ASME B31.1: “Power Piping Code”

  31. 100% Testing MSS-SP-61/API 598 • Body Hydrostatic Test: • 1.5 times MCWP at 100 F (38 C) • Seat Closure Test: • 1.1 times MCWP (in preferred direction) • Acceptance Criteria: 10 ml/hr x nominal valve size (inches)

  32. Questions or Comments?

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