Severe Service Technology, Inc.

SSSSTT11000 Stancliff Road, Suite 190 – Houston, Texas 77099

Tel: (281) 988-8222 – Fax: (281) 988-8294

Severe Service Valves

for

Power Generation & Paper Industries

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Since its founding in 1994, Severe Service Technology, Inc. has dedicated itself to the engineering and manufacture of the most rugged and durable metal-seated ball valves in the industry. Our years of manufacturing experience, combined with over 50

years of engineering expertise, has created a complete isolation valve solution to any industry’s toughest critical service applications. We have shipped over 15,000 valves.

We provide total turnkey operations with design offices in Houston, Texas and manufacturing in Monterrey, Mexico.

Our 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 exceed

ANSI, AISI, API and MSS-SP-61 requirements.

Rely on us for your next metal-seated ball valve requirements. Allow our products to be

the solution to your most demanding applications. Increase your productivity, maximize your plant efficiency and operate concern free with our 4-Year Product Warranty.

Applicable Codes and Standards for Power Generation Industry

SST valves are designed, manufactured and tested to:

• MSS-SP 61: “Pressure Testing of Steel Valves”• API 598: “Valve Inspection and Testing”• ASME B16.34: “Valves – Flanged, Threaded and Welding End”

• ASME B31.1: “Power Piping Code”• ASME TDP-1: “Prevention of Water Damage to Steam Turbines”

Severe Service Metal Seated Ball Valves vs. Y-Pattern Globe Valves

Many operating plants have replaced traditional globe valves with ball valves. Globe valve

discs and seats are subjected to erosion and seat wear due to their location within the body

and flow path.

Ball valves are fast and easier to manually operate, and by using harder coatings such as

Chromium Carbide provide better performance over softer Stellite materials.

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Model SSV

Isolation/Drain/Vent

Item Standard Materials

BodyA105 Carbon Steel

F22/F91 Chrome Moly

316 Stainless Steel

Seat*410 Stainless Steel

Inconel 718

Ball* 410 Stainless Steel

Inconel 718

Push Ring* 410 Stainless Steel

Spring A286 Stainless Steel

Stem Hardfaced Stainless Steel

Packing Grafoil

* High Velocity Oxygen Fueled (HVOF) CoatingA process; using oxygen, hydrogen and Chromium CarbidePowder at MACH 5 to create 53-57 Rc harness on Ball and Seat. Coating is suitable for temperatures to 1400 F (750 C).

Body

Packing

Ball

Spring

Push Ring

Transition Piece

Live Loaded

Packing Gland

Product Overview

• Sizes: 1/2 to 2-1/2”

• One-Piece Design

• ASME Classes: 1500, 3200 & 4500

• End Connections: SW & BW

• Bore: Reduced

• Sealing: Uni-directional

• Actuation: Lever, Gear, Electric and Pneumatic

Downstream Seat

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Model SVVSuperheater Startup Vent Valve

Description and Application:

The Superheater Startup Vent Valve is open during boiler startup, up to 30%

boiler capacity. Valve is used to vent low temperature and pressure saturated steam. During initial operation of a HRSG or Boiler, bypassing main steam aroundthe steam turbine to the atmosphere so the unit does not come up to temperature

too quickly.

ProductThe SVV is available in all sizes and ASME pressures to 4500. Valve can be operated via Gear, Pneumatic or Electric Actuation.

Pneumatic Valve(Normally Closed)

Manual Valve(Normally Open)

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Model SVVSuperheater Startup Vent Valve

Materials of Construction

* High Velocity Oxygen Fueled (HVOF) Coating

Part MaterialBODY / END ADAPTER CR MO SA182 F91

BONNET SS A182 F316H

STEM SS 17-4 PH H1075

PACKING RING CHESTERTON 1400R

GLAND FLANGE SS 17-4 PH H1075

BALL* INCONEL 718 - 125KSI

SEAT, DOWNSTREAM* INCONEL 718 - 125KSI

SEAT, UPSTREAM* INCONEL 718 - 125KSI

Ball

Spring

Upstream SeatBall

Downstream Seat

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Model SSIERV/PORV Isolation Valve

Description and Application:Model SSI is the Isolation Valve installed under the ERV or PORV. The SSI is normally open and is used when maintenance is required on the ERV or PORV.

ERV or PORV (supplied by others) is a pneumatic actuated pressure relieving

valve. Their purpose is to prevent or reduce the number of lifts of the Main SteamSafety Valve, thus extending their life. Installed in conjunction with automated or electronic controls for control of boiler capacity or overprotection of the boiler.

ProductThe SSI is available in all sizes and ASME pressures to 4500. Body material is

Chrome-moly with 410 Stainless Steel or Inconel 718 trim and HVOF coated with Chromium Carbide. Valve can be operated via Gear, Pneumatic or Electric Actuation.

Main Steam Line

Main Steam

Relief Valve

ERV/PORV

(by others)

Model SSI

Isolation

Valve

ISO Standard actuator bolt

pattern for easy automation

Downstream Seat

Ball

Upstream Seat

Spring

Live Loaded Packing

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Feedwater Drains

Gauge Glass Drain and Isolation

Boiler/Reheat/Superheat Drain, Vents and Root

Economizer Stop

Flash Tank

HP Feedwater System

IP Heater Applications

Blowdown

Condensate Drain

Mud Drum Drain

Steam Trap Isolation

Sootblower System

Inert Steam System

HP Turbine Steam Supply & Extraction

Emergency Relief Valve (SSI)

Superheater Startup Vent Valve (SVV)

Pulp & Paper Applications

Digester Blowdown ValvesGreen Liquor Valves

Black Liquor ValvesSteam Drain & Vent Valves

100% Testing per MSS-SP-61/API 598

• Body Hydrostatic Test: •1.5 times MCWP at 100 F (38 C)

•

• Seat Closure Test: 1.1 times MCWP (in preferred direction)

Acceptance Criteria: 10 ml/hr x nominal valve size (inches)

•

• Low Pressure Test: 80 psi (6 bar) Air and 1000 psi (69 bar)

a. Nitrogen with “zero” drops or bubbles

allowed for a 2 minute observation period.

Power Plant Applications

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Severe Service Technology, Inc.

SSSSTT11000 Stancliff Road, Suite 190 – Houston, Texas 77099

Tel: (281) 988-8222 – Fax: (281) 988-8294E-mail: sales@sstvalve.com

www.sstvalve.com

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