Severe Service Technology, Inc.
SST
Severe Service Metal Seated Ball Valves
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Incorporated in 1997
Over 15,000 valves shipped
Total Turnkey Operations
• Corporate and Design Offices: Houston, TX
• Manufacturing, Assembly & Test: Monterrey, Mexico
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Industries:
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Power Generation
Process
Mining
Paper
All Designs via SOLIDWORKS Simulation
FEA
• Deflection Analysis
• Stress Analysis
• Thermal Analysis
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Metal Seated Valves with Special Coatings on Sealing
Surfaces
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Zero Leakage to API, MSS-SP-61, and ISO Standards
and Procedures
High Pressure (500+ psi /35+ bar)
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High Temperature (up to 1500F /815 C)
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Erosive or Corrosive Media (i.e., bitumen, copper, iron
ore, gold, silver, and salt water)
• Sizes: 1/2 to 36”
• ASME Class: 150 to 2500
• End Connections: RF Flanged, RTJ, Greylock,
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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
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.
Item/Part
Materials
Body / End
Adapter
Carbon Steel: A105
Stainless 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
Grafoil
Coatings
HVOF (Tungsten Carbide) and Spray & Fuse
Consult Factory for other materials
Live-Loaded
Packing Gland
End
Adapter
Spring
Seat
Stem
Body
Spring
Ball
Spiral Wound
Gasket
Seat
Spring
Seat
• Design can be used for
both Uni- and BiDirectional applications
• Reduce requirement for
spare valves
Spring
Seat
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
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
Slurry
O-Ring eliminates
material from getting
behind Seat.
Spring
E-Ring eliminates
material from getting
behind Seat
Slurry
Slurry
Spring is located above
the Seat (not behind Seat)
and out of the flow path.
Material: Inconel 718
Slurry Flow
Knife edge design assists
in removal of particulate
matter from Body cavity
when valve is cycled
Retention ring prevents bottom
of Stem from making direct
contact with Ball Slot, thereby
eliminating possibility of damage
during actuator installation
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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”
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Other local requirements
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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
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SST will respond within 48 hours
• “Service Plan”
• Troubleshooting
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English and Spanish speaking Field Technicians
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Dofasco Steel
Rio Tinto/Quebec Iron and Titanium
Sudbury Mining
Lakefield Research & Dev.
Kilborn Engineering
VALE/Inco
SNC Lavalin
CAP Mineria/Hierro Atacama
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.
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.
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 backpressure 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.
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.
ASME Class 150 - 2500
Full Bore
Sizes 2 -36"
Floating Ball
Scraper Seats
Body/Adapter Structure (pieces)
Ball & Seat Material (Standard)
Ball & Seat Coating (Standard)
Ball & Seat Coating (Optional)
Coating Process
Body / End Adapter Material
Live-Loaded Stem Packing Gland
Flow Design
Separate Downstream Seat
Mate-lapping of Ball and Seats
SST
Yes
Yes
Yes
Yes
Yes
2&3
17-4 PH H900
Tungsten Carbide
CC, non-Nickel
HVOF
Forging
Yes
Symmetical
Yes
Full 360 degree
Mogas
Yes
Yes
Yes
Yes
Yes
2&3
410 SS
Chromium Carbide
TC, non-Nickel
HVOF
Forging
Optional only
Bi-directional
Yes
Seat Face (wide)
Above Seat (out of flow
In Flow Path
path)
O-ring to eliminate material flowing Yes, on both Upstream and
behind Seat
Downstream Seats
On Downstream Seat only
E-Ring to eliminate material flowing
Yes (2)
No
behind Seat
Flush-Out Body Cavity
Yes
No
Spring location
VTI
Yes
Yes
Yes
Yes
Yes
2
Varies
RAM 31 C.C.
TC, non-Nickel
RAM 31 (HVOF)
Forging/Casting
Yes
Uni & Bi-directional
No (intregral with Body)
Seat Face (narrow)
In Flow Path
No
No
No
Notes
All the
Same
Similar
Major
Difference
Questions or Comments?