Severe Service Metal Seated Ball Valves
Severe Service Technology, Inc. SST
Severe Service Technology, Inc.
• Incorporated in 1997• Over 15,000 valves shipped• Total Turnkey Operations
• Corporate and Design Offices: Houston, TX • Manufacturing, Assembly & Test: Monterrey, Mexico
• Industries:• Power Generation• Process• Mining• Paper
Plant: Monterrey, Mexico
Design – Computer Optimized
FEA• Deflection
Analysis• Stress Analysis• Thermal Analysis
All Designs via SOLIDWORKS Simulation
• Metal Seated Valves with Special Coatings on Sealing Surfaces
• Zero Leakage to API, MSS-SP-61, and ISO Standards and Procedures
• High Pressure (500+ psi /35+ bar)• High Temperature (up to 1500F /815 C)• Erosive or Corrosive Media (i.e., bitumen, copper, iron
ore, gold, silver, and salt water)
What are Severe Service Valves?
Mining & Minerals Industry
Model SSM - Product Overview• Sizes: 1/2 to 36”• ASME Class: 150 to 2500• End Connections: RF Flanged, RTJ, Greylock,
Buttweld and Socketweld• Bore: Full and Reduced• Side and Top Entry• Trim Materials: Metallic and Ceramic• Sealing: Symmetrical (Uni and Bi-directional)• Actuation: Lever, Gear, Electric, Pneumatic
and Hydraulic
DesignTwo or three piece side-entry floating ball valve design with:• Live-load Stem Packing Gland• Scraper Seats• Downstream Seat Retainer• “Flush-Out” Body cavity• ISO Mounting Pad• Optional “Portable Flushing System”.
Also available in Top-Entry floating ball design with “caged trim”• Provides installation of internals (ball, seats, and
springs) while valve remains in pipeline. • In certain conditions this design greatly reduces
downtime and cost versus removing existing valve.
Standard MaterialsItem/Part MaterialsBody / End Adapter
Carbon Steel: A105Stainless Steel: Type 304 & 316
Seat Stainless Steel: 17-4PH (H900)Inconel 718
Ball Stainless Steel: 17-4PH (H900) Inconel 718
Spring Stainless Steel: 17-4PH (H900)Stem Stainless Steel: 17-4PH (H900) Packing GrafoilCoatings HVOF (Tungsten Carbide) and Spray &
FuseConsult Factory for other materials
Model SSM: Design Overview
BodyEnd
Adapter
Ball
Seat
Seat
Spring
Stem
Spiral Wound Gasket
Live-Loaded Packing Gland
Spring
Symmetical Design
Seat Seat
Spring Spring
• Design can be used for both Uni- and Bi-Directional applications
• Reduce requirement for spare valves
High-Tech Coatings
High Velocity Oxygen Fueled (HVOF) process; using oxygen, hydrogen and Tungsten Carbide powder at MACH 5 to 53-57 Rc harness
Spray and Fused: Colmonoy (Nickel based) provides very high hardness (50-53 HRC) and extremely good wear and abrasion resistance
“Flush-Out” Body Profile
Upon initial opening some material will enter body cavity. Upon valve re-opening, material will “flush-out”
downstream of Ball in preferred flow direction
Valve Open Valve Closed
Sealing Design
SpringO-Ring eliminates material from getting behind Seat.
E-Ring eliminates material from getting behind Seat
Slurry
SlurrySlurry
Spring
Spring is located above the Seat (not behind Seat) and out of the flow path.
Material: Inconel 718
Slurry Flow
Scraper Seats
Knife edge design assists in removal of particulate matter from Body cavity when valve is cycled
Stem Retention System
Retention ring prevents bottom of Stem from making direct contact with Ball Slot, thereby eliminating possibility of damage during actuator installation
Codes and StandardsDesigned, Manufactured & Tested
• API 598: “Valve Inspection and Testing”• API 608: “Metal Ball Valves – Flanged, Threaded and
Welding End”• ISO 5208: “Pressure Testing of Metallic Valves”• MSS-SP-61 “Testing”• ASME B31.3 “Process Piping”• ASME B16.34 “Valves – Flanged, Threaded and Welding
End”
• Other local requirements
Testing
• Tested to API 598 and MSS-SP-61• Body Hydro at 1.5 times MCWP• Seat Tested in preferred direction at 1.1 times MCWP
Product Field Service• SST will respond within 48 hours
• “Service Plan” • Troubleshooting
• English and Spanish speaking Field Technicians
Customers• Dofasco Steel• Rio Tinto/Quebec Iron and Titanium• Sudbury Mining• Lakefield Research & Dev.• Kilborn Engineering• VALE/Inco• SNC Lavalin• CAP Mineria/Hierro Atacama
Mining & Mineral Applications
Autoclaves: SST provides severe service valves for leaching processes (i.e., HPAL) where both high pressure and temperature are present. Valves are also designed for erosive and corrosive applications such as autoclave discharge, vent, isolation, and feed. Roasters: A dry process involving gas-solid reaction at very high temperatures to purify the metal components. Severe service valves are used for isolation and drain. Tailings: A waste slurry product of fine minerals and water which remain after extracted from unusable ore produced by the milling operation.
Mining Applications Tailings: A waste slurry product of fine minerals and water which remain after extracted from unusable ore produced by the milling operation. Floatation Cells / Column Thickeners: A method to separate minerals depending on their ability to attach to air bubbles and carry them to the surface. High Pressure Leaching: Where cyanide is added to a precious metal (i.e. gold) and leaching the mineral into solution. Oil Sands: Severe service valves are used in froth treatment, slurry production processes and steam injection in Steam Assisted Gravity Drain (SAGD) systems.
16” Valves
Operating and Standby Pump Stations: Severe service ball valves are used to prevent slurry leaking (zero leakage and full differential pressure) back to an idle pump. Valves can be used for both suction and discharge sides for pump isolation. Choke Stations: Where pressure built up must be reduced or eliminated to maintain safe pipeline operation and provide back-pressure to provide constant flow. Severe service ball valves are used to divert flow to the Choke Station. When closed, the ball valves must provide zero leakage at full differential pressure.
Slurry Pipeline Applications
Slurry Pipeline Applications Isolation Stations: Valves are required to operate in the event of major rupture to the pipeline. Placed at certain intervals, ball valves can isolate sections of the pipeline. It is common to have two valves in series (“Cut and Seal”) where one is the flowing valve (Cut) and one is the isolation valve (Seal). SST’s full-ported valves are also designed for pig launching and receiving stations. Instrument Isolation: Control and measurement systems are located the length of the pipeline. These small severe service valves are used to isolate instruments for repair, calibration or replacement while the pipeline is in normal operation. High-Pressure Dewatering: Process where high-pressure water is pumped to the surface from underground mining applications.
SST Mogas VTI NotesASME Class 150 - 2500 Yes Yes Yes Full Bore Yes Yes Yes All theSizes 2 -36" Yes Yes Yes SameFloating Ball Yes Yes Yes Scraper Seats Yes Yes Yes Body/Adapter Structure (pieces) 2 & 3 2 & 3 2 Ball & Seat Material (Standard) 17-4 PH H900 410 SS Varies Ball & Seat Coating (Standard) Tungsten Carbide Chromium Carbide RAM 31 C.C. Ball & Seat Coating (Optional) CC, non-Nickel TC, non-Nickel TC, non-Nickel SimilarCoating Process HVOF HVOF RAM 31 (HVOF) Body / End Adapter Material Forging Forging Forging/Casting Live-Loaded Stem Packing Gland Yes Optional only Yes Flow Design Symmetical Bi-directional Uni & Bi-directional
Separate Downstream Seat Yes YesNo (intregral with
Body) Mate-lapping of Ball and Seats Full 360 degree Seat Face (wide) Seat Face (narrow) MajorSpring location Above Seat (out of flow
path) In Flow Path In Flow Path DifferenceO-ring to eliminate material flowing behind Seat
Yes, on both Upstream and Downstream Seats
On Downstream Seat only No
E-Ring to eliminate material flowing behind Seat Yes (2) No No Flush-Out Body Cavity Yes No No
Questions or Comments?