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?