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Severe Service Metal Seated Ball Valves

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Presentation on theme: "Severe Service Metal Seated Ball Valves"— Presentation transcript:

1 Severe Service Metal Seated Ball Valves
Severe Service Technology, Inc. SST Severe Service Metal Seated Ball Valves

2 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 Our state of the art manufacturing facility is fully equipped with the latest technology in machining, thermal spraying and testing equipment. Our rigid, quality control standards ensure that our products are manufactured with detailed precision that meet or exceed ANSI, AISI, API and MSS-SP-61 requirements.

3 Plant: Monterrey, Mexico
16,000 square feet Machining operation Thermal Spraying performed on-site

4 Design – Computer Optimized
All Designs via SOLIDWORKS Simulation FEA Deflection Analysis Stress Analysis Thermal Analysis Finite Element Analysis

5 What are Severe Service Valves?
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)

6 Mining & Minerals Industry

7 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

8 Design Two 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.

9 Standard Materials Item/Part Materials
Body / End Adapter Carbon Steel: A105 Stainless Steel: Type 304 & 316 Seat Stainless Steel: 17-4PH (H900) Inconel 718 Ball Spring Stem Packing Grafoil Coatings HVOF (Tungsten Carbide) and Spray & Fuse Consult Factory for other materials

10 Model SSM: Design Overview
Live-Loaded Packing Gland Stem End Adapter Body Spring Spring Seat Ball Seat Spiral Wound Gasket

11 Symmetical Design Spring Spring Seat Seat
Design can be used for both Uni- and Bi-Directional applications Reduce requirement for spare valves

12 High-Tech Coatings High Velocity Oxygen Fueled (HVOF) process; using oxygen, hydrogen and Tungsten Carbide powder at MACH 5 to Rc harness Spray 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 Open Valve Closed Upon 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.
Slurry O-Ring eliminates material from getting behind Seat. E-Ring eliminates material from getting behind Seat Spring Slurry Slurry

15 Spring Spring is located above the Seat (not behind Seat) and out of the flow path. Material: Inconel 718 Slurry Flow

16 Scraper Seats Knife edge design assists in removal of particulate matter from Body cavity when valve is cycled

17 Stem Retention System Retention 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 direction at 1.1 times MCWP

20 Product Field Service SST will respond within 48 hours “Service Plan”
Troubleshooting English and Spanish speaking Field Technicians

21 Customers Dofasco Steel Rio Tinto/Quebec Iron and Titanium
Sudbury Mining Lakefield Research & Dev. Kilborn Engineering VALE/Inco SNC Lavalin CAP 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 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.

24 16” Valves

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
SST Mogas VTI Notes ASME Class Yes Full Bore All the Sizes 2 -36" Same Floating Ball Scraper Seats Body/Adapter Structure (pieces) 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 Similar Coating Process HVOF RAM 31 (HVOF) Body / End Adapter Material Forging Forging/Casting Live-Loaded Stem Packing Gland Optional only Flow Design Symmetical Bi-directional Uni & Bi-directional Separate Downstream Seat No (intregral with Body) Mate-lapping of Ball and Seats Full 360 degree Seat Face (wide) Seat Face (narrow) Major Spring location Above Seat (out of flow path) In Flow Path Difference O-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) Flush-Out Body Cavity

28 Questions or Comments?

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