virgo-tov-application-guide-en-us-94690 Proven performance for industries that demand reliability.
Virgo Triple Offset Valve Applications Guide
Why Virgo?
The Virgo line of Ball Valves and Triple Offset Butterfly Valves are part of Emerson Process Management product portfolio. Emerson has experts located around the globe, ready to help solve the problems our customers face; this includes a huge network of experts in the Virgo product line. The Virgo product portfolio, in combination with other Emerson products, provides our customers with a complete valve solution that addresses their problems and optimizes their processes. All Virgo products are designed utilizing the latest design tools, including Pro-E, Computational Fluid Dynamics (CFD), and Finite Element Analysis (FEA), to ensure that our products are safe, reliable and perform as advertised. During manufacturing, Emerson utilizes state-of-the-art equipment and techniques to produce Virgo products cost-effectively, with quality standards that often exceed those of other valve manufacturers. All of this exceptional design and manufacturing is capped off with an industry-leading test facility. Not only does Emerson's test facility assure that Virgo products are made according to exceptional quality standards, our facility can perform testing to certify that our products are compliant to the latest standards and certifications. When you purchase Virgo products you can expect: · Reliable products at a competitive price Emerson's investment in superior manufacturing equipment, an ongoing
commitment to keep our employees well-trained, and our quest for upper quartile performance are just a few items that drive our mission for the highest in-class quality. At the same time, our global supply chain and manufacturing allows us to produce products at very competitive prices when compared to other high-quality valve manufacturers. · Expert project management Virgo valves have been supplied to over 2,300 projects around the globe, both large and small. We help our customers maintain project certainty by presale design collaboration, a structured project execution process, and maintaining flexibility throughout the manufacturing process. The result is a responsive supplier that supports you throughout the process and meets the promised delivery dates. · Single point accountability Emerson owns the process from design, manufacturing, assembly, automation, integration, and lifecycle coverage. Emerson goes to great lengths to maintain full process accountability that only a few industry-leading manufacturers can provide. This includes having our own in-house foundry, which enables Emerson to maintain the highest quality standards on all Virgo products. · Local support and a global presence Our vast network of Local Business Partners (LBPs) are there to support our customers, including you, around the globe. These partnerships offer our customers superior pre- and post-sales support, local inventory, as well as a comprehensive range of other services. · Safe, proven products We are committed to delivering quality products that meet or exceed our customers' expectations. This commitment starts with thorough testing of our products to ensure that they comply with the latest standards and certifications. This is backed up by years of experience in many of the most demanding applications around the globe. We have supplied over 1 million valves to more than 150 of the world's leading EPCs, OEMs, and end users, and they keep coming back to Emerson over and over.
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About the Product
Virgo's Triple Offset Valve (TOV) is a quarter-turn, metal-to-metal sealing, zero-leakage valve. Lighter in weight compared to other types of valves, it features low-operating torques, high cycle life, an inherently firesafe design, a one-piece shaft with blowout-proof construction, sealed bearings, and adjustable shaft seals for low emissions.
The TOV provides consistent performance with demanding processes, namely, steam, high pressure, and cycled services. It is relied upon in oil and gas process lines, refineries, power plants, sea water treatment facilities, pump stations, wastewater effluent treatment plants, circulating water systems, desalination facilities, and cooling water system applications.
The versatility of design and construction allows for use in various applications and within a wide range of temperatures.
PRODUCT RANGE
· Size: 3" to 56" · Rating: ANSI 150# to ANSI 600# · Temperature Range: -50 °C to 400 °C · Disc sealing: Graphite / Metal laminated · End Connections: Lug, Double Flanged
(short pattern), Double Flanged (long pattern for gate valve replacement)
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TOV Standards
Virgo's Triple Offset Valve (TOV) possesses many advantages over gate, globe, and plug valves, particularly in large valve applications. Among the most obvious ones are savings in weight, space, and cost. Maintenance costs are usually low because there is a minimal number of moving parts and there are no pockets to trap fluids. The TOV, being a quarter-turn low-torque valve, offers you the ability to easily and cost-effectively automate the valve.
Some of the advantages of Virgo's Triple Offset Butterfly Valves include:
· Compact design that requires less space compared to other valves · Lightweight · Easy to automate · Quick operation that requires less time to open or close, making them ideal in
emergency shutdown applications · Long cycle life, having few moving parts and a non-rubbing seat · Available in very large sizes · Low-pressure drop and high-pressure recovery · Zero leakage · Highly reliable, requiring little or no maintenance · Low fugitive emissions
REFERENCE STANDARDS
Design and Manufacturing Face-to-Face / End-to-End
End Connection
Testing Safety Fire Test Fugitive Emission Testing Material Conformance Product Compliance
API 609 (Category B), ASME B16.34, BS EN 593 API 609, ASME B16.10, ISO 5752 Series 13, ISO 5752 Series 14 ASME B16.5 for flanged end up to 24" / ASME B16.47 for larger size Series A and B API 598, ANSI/FCI 70-2 SIL3 API 607 / ISO 10497-5, API 6FA MESC 77/312, ISO 15848-1, ISO 15848-2 NACE MR 01-75 Pressure Equipment Directives PED (97/23/EC), EAC
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The replacement of gate and plug valves presents cost savings opportunity when using the Virgo's Triple Offset Valve. The following table illustrates the advantages of the TOV compared to those valves:
PARAMETERS Design Standard Testing Standard Face to Face Dimensions Fire Safe Ease of Operation / Operating Time Automation
Leakage Weight Fugitive Emission Tightness Maintenance Control Valve Application Jamming/ Galling / Seizing Positive Segregation
Application
Conclusion
TRIPLE OFFSET VALVE (TOV)
GATE VALVE
PLUG VALVE
API 609
API 600
API 6D
API 598
API 598
API 6D
API 609
ASME B6.10
API 6D
As per API 607 / API 6FA
As per API 6FA
As per API 6FA
Quarter turn / Fast opening
Multi turn / Takes time to open
Quarter turn / Quick open if lubricated
Easy to automate
Unreliable to automate
Actuator sizing difficult due to inconsistent torques
Zero leak
No zero leakage, leakage allowed per testing standard
Zero leakage achieved only by using lubricant
Light
Heavy
Heavy
Excellent
Poor
Good
No maintenance required
Required for smooth operation
Required for smooth operation
Yes
No
No
No probability
High probability
Very high probability
Yes
No
Yes
All applications where gate & plug valves are used, except piggable lines. Critical applications like LNG and tank farms where zero leakage is mandatory.
Can't be used for critical applications
Limited usage
Triple offset valves are more reliable and easy to operate. They have zero leakage (tight shut-off) and require little or no maintenance. Triple offset valves are inherently fire-safe and do not have soft parts, making them the best valve for fire-hazard applications.
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Applications
Virgo's Triple Offset Valve (TOV) is designed for critical applications in a variety of industries.
Applications include:
OIL AND GAS
Upstream, Downstream, Pipeline and Storage
· Isolation of reservoirs and storage · Steam piping and condensate · Cooling water systems · Desalinization · Transport of hydrocarbons · Desulfururization system · Hydrogen gas service · Services with hot gasses · Services with solvents · LPG and LNG lines
MINING AND METALLURGY
· Water pumping stations · Cooking water services
REFINING
· Oil storage isolation · Hot cracking gas · Flare gas hydrogen · Sour gas isolation · Steam supply valves · Catalytic cracker units · Desulfurization systems
and tail gas treaters · Sulfur condenser switch · Terminals and tank farms · Coker plants · Fire suppression
STEEL MILL
· Cooling water pumping stations · Hot gas (tail gas) · Hot air · Blast furnace, tail gas
and coke oven gas
POWER GENERATION
Renewables, Fossils, District Heating, Nuclear and Coal
· Equipment isolation (pumps, valves, heat exchangers, condenser cooling, etc.)
· Gas turbine isolation · Pump and steam extraction isolation · District heating and cooling · Condenser cooling · Suppression system · Cooling, condensate, feeding water
and steam · Gas exhaustion and air injection
CHEMICAL AND PETROCHEMICAL
· Ethylene plants · Ethylene crackers · Propylene plants · Hydrogen gas service · Propane gas service
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· Brine, CO2 vapor and steam service · Cryogenic services · Thermal fluids · Tail gas · Hydrocarbon gas service · Flare inlet and manifold isolation · PSA and molecular sieves · Coker plants · Pump isolation
SUGAR AND ALCOHOL
· Steam · Cooling water · Vegetable steam · Boiler feed water piping · Equipment isolation
(pumps, heat exchanges, etc.) · Pre-evaporators isolation · Condensate lines · Pressure relief of process
steam lines
PULP AND PAPER
· Boiler isolation equipment (pumps, etc.)
· Steam isolation · Green, white and black liqueurs · Whitewash · Cooling water · Boiler feeding · Steam and cogeneration systems
WATER AND SEWAGE
· Water distribution pumping · Sewage pumping · Water and waste treatment · Water pumping stations
NUCLEAR
· Containment isolation · Saltwater service · Core spray systems
LNG
· All liquid gases · Oil field recovery · Liquid natural gas · Gasification plants and storage · LNG ships · Tank farm isolation
OTHER APPLICATIONS
· Automotive production · Shipyards · Aerospace · Food and beverage · Water pipelines · District storage and distribution · Tanks and terminals · Abrasive services · Fire suppression systems · Marine
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Emerson Process Management Virgo Valves 10225 Mula Road, Suite 130 Stafford, TX 77477, USA Phone: +1 281 933 3100 Fax: +1 281 933 3110 www.Virgo-Valves.com
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The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available on request. We reserve the right to modify or improve the designs or specifications of our products at any time without notice. Responsibility for proper selection, use and maintenance of any product or service remains solely with the purchaser and end user.
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