Jamesbury® Taking Valve Technology To An …

1 jamesbury Taking Valve SealingTechnology To An Xtreme Metso North America2 jamesbury Valve SOLUTIONST aking Valve SealingTechnology to an XtremeA long-lasting Valve sealing Technology relying on advancedmaterials and complementary seat geometries extends therange of standard, high-performance soft seat designs intohigher temperature/pressure ranges without increasing thevalve owner's by Jamesburyfor its soft-seated on/offball and butterfly valves , the Xtremesealingtechnology is capable of dramatically reducing thenumber of applications that require costly, specialseat designs and higher torque output actuators inchemical processing and many other industries withsevere service requirements. Unique Fluoropolymer The foundation for the Xtremesealing Technology isJamesbury sexclusive, flexible-lip seat design that,for the better part of five decades, has beenconsidered the most reliable of Valve sealingtechnologies.

2 This design is a substantialimprovement on conventional, non-flexing jam seats and seats that have stiff internal componentsprone to fatigue, corrosion and wear. It is reportedthat flexible-lip sealing Valve Technology deliversbubble-tight shut-off for a decade or Jamesburypolymer laboratory teamresearched new polymeric materials that allows thecompany to achieve greater single-piece, polymericseat manufacturing efficiencies while, at the sametime, improves the temperature/pressureperformance of the seat. This allows Jamesburytooffer its customers a soft seat that delivers tightshutoff over a wider range of operating conditionsthan its standard PTFE and glass-filled PTFE seatswithout increasing fluoropolymer material exhibits superiorrecovery, the ability of a material to bounce backafter compression, and cycling at hightemperatures.

3 Fluoropolymer has 50% betterrecovery than either PTFE or filled PTFE at 450 F. Thisproperty is important in maintaining close contactbetween the seat and the ball or disc of the Valve , especially in services where hightemperatures and pressures are involved. Thisunique formulation for improved recoveryproperties is the basis for the the material performs well in hightemperature/pressure ranges where standardpolymeric seats were not used previously, in thedevelopment of this product, Jamesburyevaluatedthe seat geometry under a different set of operatingconditions. No modifications were required for theWafer-Sphere high-performance butterfly seatgeometry. However, much to the surprise of theoriginal engineers, there was considerable room toimprove the legendary seat design in the ballvalves.

4 With the aid of finite element modeling, seatgeometry was modified for each ball Valve size. Inone instance, as many as nine modifications weremade, adding and subtracting material to optimizesealing capacity of the Valve at high temperatureand pressures. In each case, care was taken not tocompromise the Valve s pressure relief features. Once the geometry was optimized for each ballsize, Metso fine-tuned manufacturing processes sothe new seat could be produced with consistentquality and without a cost increase to the makes it possible to offer Xtremeseattechnology for the Jamesbury2-1/2" to 48" Wafer-Spherebutterfly valves , 1/4" to 2" EliminatorSeries and Series 4000, and 1/2" to 12" standard andfull bore flanged ball valves .

5 New materialsand seatgeometriesimprovesevere servicevalve cost/performanceand life expectancy3 jamesbury Valve SOLUTIONSB reak-Through Performance Butterfly and ball valves equipped with the Xtremetechnology seat deliver a number of performanceand cost advantages versus PTFE, standard filledPTFE and special PEEK (polyetheretherketone) Pressure/Temperature the Xtremeseat material has betterrecovery at higher temperatures than PTFE andfilled PTFE, it maintains continuous contact with thevalve s ball or disc for better sealing, even at highertemperatures and pressures. Pressure/temperaturecurves improve significantly for every size of balland butterfly standard Xtremeseat delivers sealingperformance comparable to special PEEK seats upto 500 F.

6 A 4000 series Valve with an Xtremeseat israted at 1200 psi at 300 F (versus 700 psi for a filledPTFE seat). At 500 F, filled PTFE does not perform atall, while the Xtreme seat is rated to 350 psi. Xtremetechnology allows butterfly valves withstandard Xtremeseats to go where they have nevergone before. An ANSI Class 300 Wafer-Spherevalvewith filled PTFE seats is rated up to180 psi at 500 Xtremeseats, the Wafer-Spherevalve is rated forup to 350 psi. This is a remarkable 100% increaseand gives cause for users to consider the cost/performance advantages of butterfly valves forservices where they were not previously lower coefficient of friction and reduced stiffness,particularly in comparison to PEEK seats, translatesto lower torque requirements for valves equippedwith Xtremeseats.

7 In many instances, it is possibleto reduce actuators by one or more example, a 2" 4000 series Valve with a PEEK seat requires 75 pounds of torque to operate. Thesame Valve equipped with an Xtremeseat requiresonly 25 pounds. The actuator specification in thisinstance is reduced by three it was not an original design objective,Xtremeseats provide longer leak-free Valve must be evaluated on a case-by-casebasis. However, cycle life improvements measuredto date range from 50% to 500%. For example, aWafer-Spherebutterfly Valve was tested at full ANSI class 150 pressure and at ambient conditions; thevalve exhibited a five times increase in cycle 4000 ball valves with filled PTFE and Xtremeseats tested with 400 F steam at 240 psi also yieldedimproved performance with Xtreme, showing twicethe life of filled PTFE seats.

8 Excellent Chemical chemical compatibility of Xtremeseats isequivalent to filled PTFE. This offers anotheradvantage over PEEK seats, which have limitedchemical resistance. As a result, Xtremetechnologycan be expanded to a broader range of applicationsin the PEEK temperature high temperature monomer service, the mediacan work its way into PTFE and filled PTFE. Thetrapped monomer can polymerize and create acrust of solidified material. This solidificationprocess is referred to as popcorning and can causemechanical damage to the seats. Popcorning canbe minimized by using Xtremematerial because ofits lower permeability compared to PTFE and LineJamesbury sunique, single-piece, polymeric seatdesign has been widely recognized for its long-lasting, leak-free performance.

9 jamesbury s Xtremeseat offers numerous opportunities for long-termcost reductions through: Seat material consolidation An extended cycle life Smaller actuator requirements The ability to utilize high-performance butterflyvalves and ball valves in a wider range ofapplicationsXtremetechnology could be the most significantimprovement in soft seat Technology sinceJamesburyintroduced the flexible-lip seat designnearly a half century a butterfly Valve , the disc is downstream of theseat and line pressure pressurizes the full cross-section of the seat. The seat then follows the naturaldeflections and contour of the disc. Increased linepressure enhances sealing, even though the samepressure moves the disc away from the seat.

10 Linepressure is not the only source of disc and seatdeflections. Temperature changes or naturaldifferential temperatures between the cooler bodyand hotter disc can also cause increased seat designed into the seat provide sealing principles are similar for ball valves . Inaddition, the Jamesburyseat design has intrinsicpressure relief, which enables the Valve to vent itselfwhen higher temperatures cause gasses to expandwithin the Valve . This important safety featureprotects people and equipment by eliminating thepotential for valves element analysis of a ball Valve with , Issue 12/2011. Product names in this brochure are all trademarks of Metso Automation Porvoontie 229, 304FI-01301 Vantaa Finlandtel.