severe service metal seated ball valves “ taking sealing to its practical limits”

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

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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 - PowerPoint PPT Presentation

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Page 1: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Severe Service Metal Seated Ball Valves

“Taking Sealing to its Practical Limits”

Severe Service Technology, Inc. SST

Page 2: 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

• Manufacturing, Assembly & Test: Monterrey, Mexico

• Industries:• Power Generation• Refining• Chemical• Mining• Paper

Page 3: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Design – Computer Optimized

FEA• Deflection

Analysis• Stress Analysis• Thermal Analysis

All Designs via SOLIDWORKS Simulation

Page 4: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Plant: Monterrey, Mexico

Page 5: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

• 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)

What are Severe Service Valves?

Page 6: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Valves for

Power Generation Plants

Page 7: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

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

Page 8: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

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.

• Ball valves are fast and easier to manual operate than Globe Valves

Ball Valve Globe Valve

Page 9: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

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

Page 10: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

SSV: Standard MaterialsItem/Part Materials

Body A105 Carbon SteelF11/F22/F91 Chrome Moly316 Stainless Steel

Seat 410 Stainless Steel orInconel 718

Ball 410 Stainless Steel orInconel 718

Push Ring 410 Stainless SteelSpring A286 Stainless SteelStem Hard-faced Stainless Steel or

Inconel 718Packing Grafoil

Page 11: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

SSV: General Design

Flow

Page 12: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

SSV: Design

ISO Mounding Pad

1 Piece Body

Page 13: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

SSV: Trim/Internals

Live Loaded Packing Gland

Stem

Push RingDownstream Seat

Retaining RingTransition Piece

Ball

Spring

Page 14: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

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.

Material Hardness (HRc)

Stellite 6 36-45Stellite 21 27-40Chromium Carbide 53-57

Page 15: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

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

Page 16: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Coated and Mate-Lapped Parts

Push Ring

Ball

Downstream Seat

Page 17: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Applications: Power Generation

Application Conditions Size Turbine Drain Lines

Up to 2500 psi @ 1050 F 1 – 2-1/2”

Blowdown Up to 2600 psi @ 700 F 1 – 3”Boiler Drain & Vent Lines

Up to 2500 psi @ 1050 F 1 – 2-1/2”

Page 18: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Applications: Power GenerationFeedwater DrainsGauge Glass Drain and IsolationBoiler/Reheat/Superheat Drain, Vents and RootEconomizer StopFlash TankHP Feedwater SystemIP Heater ApplicationsBlowdownCondensate DrainMud Drum DrainSteam Trap IsolationSootblower SystemInert Steam SystemHP Turbine Steam Supply & ExtractionEmergency Relief Valve (SSI)Superheater Startup Vent Valve (SVV)

Page 20: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

New Products SST

Page 21: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SVVSuperheater Startup Vent Valve (Sky Vent)

Manual Valve(normally open)

Pneumatic Valve

(normally closed)

Page 22: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SVVSuperheater Startup Vent Valve

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.

Page 23: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SVVSuperheater Startup Vent Valve

Ball

Upstream Seat

Spring

Downstream Seat

Seat Landing

Stem

Page 24: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SVVSuperheater Startup Vent Valve

• 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

Page 25: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SSIERV/PORV Isolation Valve

ERV / PORV Ball Valve

(supplied by others)

Main Steam Line

Main Steam Relief ValveModel SSI

Isolation Valve

Page 26: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SSIERV/PORV Isolation ValveDescription 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.

Page 27: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SSI (SSG-1)

ISO Standard actuator bolt

pattern for easy automation

Body

End Adapter

Live Loaded Packing

Body Gasket

Page 28: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

SSG-1 Trim

Ball

DownstreamSeat

Spring

Upstream Seat

Inner Collar

Seat Landing

Page 29: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Model SSIERV/PORV Isolation Valve

• 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

Page 30: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

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”

Page 31: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

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)

Page 32: Severe Service Metal  Seated  Ball  Valves “ Taking  Sealing to its Practical  Limits”

Questions or Comments?