Presentation on theme: "Severe Service Metal Seated Ball Valves"— Presentation transcript:
1 Severe Service Metal Seated Ball Valves Severe Service Technology, Inc.SSTSevere Service Metal Seated Ball Valves
2 Severe Service Technology, Inc. Incorporated in 1997Over 15,000 valves shippedTotal Turnkey OperationsCorporate and Design Offices: Houston, TXManufacturing, Assembly & Test: Monterrey, MexicoIndustries:Power GenerationProcessMiningPaperOur state of the art manufacturing facility is fully equipped with the latest technology inmachining, thermal spraying and testing equipment. Our rigid, quality control standardsensure that our products are manufactured with detailed precision that meet or exceedANSI, AISI, API and MSS-SP-61 requirements.
4 Design – Computer Optimized All Designs via SOLIDWORKS SimulationFEADeflection AnalysisStress AnalysisThermal AnalysisFinite Element Analysis
5 What are Severe Service Valves? Metal Seated Valves with Special Coatings on Sealing SurfacesZero Leakage to API, MSS-SP-61, and ISO Standards and ProceduresHigh 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)
7 Model SSM - Product Overview Sizes: 1/2 to 36”ASME Class: 150 to 2500End Connections: RF Flanged, RTJ, Greylock, Buttweld and SocketweldBore: Full and ReducedSide and Top EntryTrim Materials: Metallic and CeramicSealing: Symmetrical (Uni and Bi-directional)Actuation: Lever, Gear, Electric, Pneumatic and Hydraulic
8 Design Two or three piece side-entry floating ball valve design with: Live-load Stem Packing GlandScraper SeatsDownstream Seat Retainer“Flush-Out” Body cavityISO Mounting PadOptional “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.
9 Standard Materials Item/Part Materials Body / End AdapterCarbon Steel: A105Stainless Steel: Type 304 & 316SeatStainless Steel: 17-4PH (H900)Inconel 718BallSpringStemPackingGrafoilCoatingsHVOF (Tungsten Carbide) and Spray & FuseConsult Factory for other materials
11 Symmetical Design Spring Spring Seat Seat Design can be used for both Uni- and Bi-Directional applicationsReduce requirement for spare valves
12 High-Tech CoatingsHigh Velocity Oxygen Fueled (HVOF) process; using oxygen, hydrogen and Tungsten Carbide powder at MACH 5 to Rc harnessSpray and Fused: Colmonoy (Nickel based) provides very high hardness (50-53 HRC) and extremely good wear and abrasion resistance
13 “Flush-Out” Body Profile Valve OpenValve ClosedUpon initial opening some material will enter body cavity. Upon valve re-opening, material will “flush-out” downstream of Ball in preferred flow direction
14 Sealing Design O-Ring eliminates material from getting behind Seat. SlurryO-Ring eliminates material from getting behind Seat.E-Ring eliminates material from getting behind SeatSpringSlurrySlurry
15 SpringSpring is located above the Seat (not behind Seat) and out of the flow path.Material: Inconel 718Slurry Flow
16 Scraper SeatsKnife edge design assists in removal of particulate matter from Body cavity when valve is cycled
17 Stem Retention SystemRetention ring prevents bottom of Stem from making direct contact with Ball Slot, thereby eliminating possibility of damage during actuator installation
18 Codes and Standards Designed, 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
19 Testing Tested to API 598 and MSS-SP-61 Body Hydro at 1.5 times MCWP Seat Tested in preferred directionat 1.1 times MCWP
20 Product Field Service SST will respond within 48 hours “Service Plan” TroubleshootingEnglish and Spanish speaking Field Technicians
21 Customers Dofasco Steel Rio Tinto/Quebec Iron and Titanium Sudbury MiningLakefield Research & Dev.Kilborn EngineeringVALE/IncoSNC LavalinCAP Mineria/Hierro Atacama
22 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.
23 Mining ApplicationsTailings: 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.
25 Slurry Pipeline Applications 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.
26 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.
27 Body/Adapter Structure (pieces) 2 & 3 2 SSTMogasVTINotesASME ClassYesFull BoreAll theSizes 2 -36"SameFloating BallScraper SeatsBody/Adapter Structure (pieces)2 & 32Ball & Seat Material (Standard)17-4 PH H900410 SSVariesBall & Seat Coating (Standard)Tungsten CarbideChromium CarbideRAM 31 C.C.Ball & Seat Coating (Optional)CC, non-NickelTC, non-NickelSimilarCoating ProcessHVOFRAM 31 (HVOF)Body / End Adapter MaterialForgingForging/CastingLive-Loaded Stem Packing GlandOptional onlyFlow DesignSymmeticalBi-directionalUni & Bi-directionalSeparate Downstream SeatNo (intregral with Body)Mate-lapping of Ball and SeatsFull 360 degreeSeat Face (wide)Seat Face (narrow)MajorSpring locationAbove Seat (out of flow path)In Flow PathDifferenceO-ring to eliminate material flowing behind SeatYes, on both Upstream and Downstream SeatsOn Downstream Seat onlyNoE-Ring to eliminate material flowing behind SeatYes (2)Flush-Out Body Cavity