ORACLE - Component Seals

Telescopic System StandsXY Stand and Y Stand“y”“x”“y”• Easy, On-Site Removal of Barrier Fluid Pipe Sag toimprove the fluid thermosyphon / convection effect• Telescopic stand adjustable to suit height & axialspace limitations• Compact Design for Transportation / Delivery• Easily fits SSE10, SSE12 & SSE25 systems• Patent Pending DesignFor more information, please contactAlan.Roddis@aesseal.co.ukXY stand stock code:VAS/XY-TSSSY stand stock code:VAS/Y-TSSSMeadowhead School Visits AESSEAL ®On the 22nd April AESSEAL ® hosted a group of studentsfrom Meadowhead School, Sheffield, England as part ofthe IBC scheme. AES has been involved in this schemesince it was introduced in 2004 under the then VIPSbanner. The scheme is run in various local schools andthe students study for NVQ qualifications instead ofGCSE. The aim is to promote the use of foreign languagelearning and recognize its importance within business.The Meadowhead group was treated to Design, CMMand CNC machine tool demonstrations and the visitculminated in students practicing their language skills byasking Chloe Angus questions in French. The students really benefited from seeing how foreign languages areused within a modern, innovative business and the visit was deemed by the teachers as a resounding success.Pump CentreVisits to AESSEAL plcFor over five years now AES have been represented on the council of the Pump Centre. The council is made upof pump users from the UK water authorities and pump OEMs. The council meets four times a year at differentlocations around the UK. In March it was the turn of AES to host the meeting and “show off” its globalheadquarters. This was the first time at AES for many of the council members and all were suitably impressedwith what is considered by many as the best facility in the seal industry.Recent meetings had focused on the Water Authorities but recognized the power industry as an industry totarget. In April the Pump Centre held its first Power Producers Forum, again at Mill Close. This was attended bya number of Power Station representatives from around the UK who came together to discuss issues/ideas theyhave on pumps. Both existing and potential customers attended. ITT industries also attended the meeting togive a presentation on their products. Companies in both the Water and Power sectors have been and willcontinue to be valuable customers of AES.4 Oracle July 2009

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AESSEAL ® Reliability Improvement CentresThe AESSEAL ® Reliability Centres have ateam of technicians who focus on repairingand upgrading all types of rotatingequipment.The team’s experiencecovers most makes,models and types ofpumps ranging from endsuction, centrifugal,vacuum, rotary lobe,progressive cavity,reciprocating, vane andmulti-stage pumps.During the Reliability Improvement processall equipment entering the premises is firstly given aunique identification number. This remains with theitem throughout its life for future traceability.AESSEAL ® has a number of Reliability Centreslocated throughout the world.These centres are focused on providing rotatingequipment reliability, over and above the primarysealing device and system.The reliability improvement services offered compriseupgrade and full refurbishment options for bad actingequipment, laser alignment, thermal camera imaging,oil sampling and condition monitoring.As the equipment, such as a pump, enters the ISOsystem at the disassembly process, the root causefailure is identified. Parts are then steam cleaned,shot blasted (where appropriate), replaced and/orupgraded before reassembly, painting and testing.Repaired rotating equipment leaves the AESReliability Centres in pristine condition, oftenunrecognisable from when it arrived.For further information on how AES improvesequipment reliability, please review the AESSEAL ®Reliability ImprovementsLiterature (right),or contact yournearest AESSEAL ®representative.Pump before refurbishment (above)After refurbishment (left)10 Oracle July 2009

AGCD & AGCS LaunchAESSEAL plc is proud to announce the officiallaunch of its AGCD (Ahlstar UP, Glandless,Cartridge, Double) and AGCS (Ahlstar UP,Glandless, Cartridge, Single) seals. These aredesigned to fit the full six bearing frame rangeof the new Ahlstar UP pump models with nominalshaft diameters of 30mm, 40mm, 50mm, 60mm,80mm and 90mm.AESSEAL ® is the only seal manufacturer to offer a fullyintegrated and glandless cartridge mechanical sealrange for these pumps, which were launched by Sulzeraround two years ago with a view to superseding theAPP and APT ranges. So what are the features of theunique and patent pending AESSEAL ® designs andwhat benefits do they offer over the integratedcomponent seals fitted as standard? They include:• Cartridge Design - an absolute must for reliablefield seal replacement• Easy to Retrofit - not a single modification to theequipment needed• Axial movement capability - will take +/-2mm(0.08”) axial movement under non reciprocatingoperation• Guaranteed concentric fitting - seal housinglocated with circumferential C nut• Independent multi sprung faces - a safer doubleseal for longer life• Axial sealing between impeller hub and sealsleeve - prevents rotary face hang up and failure• Monolithic rotary faces - resilient mount reduceseffect of impeller torqueSSE10 Water Management SystemAGCDFor additional protection against contamination,plant wash down and bearing chamber breathingAESSEAL ® also has its unique patented Labtectafor each bearing frame size - designed to reducebearing replacement costs by up to 77%.For the ultimate environmental solution it isrecommended that all double seals are used inconjunction with the AESSEAL ® water managementsystems (to save up to 4.2million litres of water perannum per seal (based on 8l/min)).The AESSEAL ® AGCD and AGCS ranges arenow on stock in Rotherham along with full literatureand price information.It is understood that there could already be over5000 opportunities for extending equipmentreliability, enhancing the reputation of AESSEAL ® andensuring long life with the AGCD AESSEAL ®glandless cartridge designs.Giving the Edge to schoolsContinuing its well established links with local schools and colleges AESSEAL ®is excited to announce the latest version of its highly successful “Back to GrassRoots” scheme. AESSEAL plc is offering a limited number of sponsorships tolocal schools & colleges with a timetable designed to support the next academicyear. Within the scheme AESSEAL plc offers:• FREE unlimited site license for Siemens PLMSolid Edge software suite (this includes homeuse by students)• FREE training events held locally at the GlobalTechnology Centre at AESSEAL ® byProfessional Design Engineers• Scheduled visits & tours available for groups ofstudents to the AES Global Technology Centre• Preferential work placement opportunities• Appropriate classroom participation byAESSEAL plc Professionals• Access to scheme training aides• AESSEAL plc is committed tosupport the scheme for at least 5 years• Sponsorship of scheme design projects(to be agreed)• Share in any publicity generated as part of thewhole schemewww.aesseal.com11

Today, best practiceis that a stationaryseal design is moreappropriate with aVFD controlledpump, proving amore robust sealingsolution for highershaft speeds.The second issue concerns the ability of the seal tocirculate barrier or process fluid during shaft speedvariation. Many double mechanical seals have an integralpumping ring designed to circulate barrier fluid betweenseal faces and a seal support system. This is a closed-loopbarrier system with the barrier fluid cleansing and coolingthe seal faces, thus extending seal life. Fig. 1 shows theposition of a tapered-vane pumping ring above theoutboard rotary seal face. Some single mechanical sealsalso have pumping rings. These are typically used with API682 Plan 23 Arrangements, as shown in Fig. 3. Similarly,the purpose of a pumping ring is to circulate barrier fluidaround the closed-loop system.Speed variations will have a direct effect on the flow rateand head produced by the mechanical seal pumping ring.At low shaft speeds, resultant flow from the pumping ringmay be insufficient to overcomeresistance from inherent flowconstraints within the sealmanagement system.This could lead toincreased heatseen at the sealfaces andconsequentlyreduced seal life.The more efficient the seal pumping ring is at circulatingfluid, the greater the scope to enable effective flow with aVFD pump. Design differences lead to some pumping ringsbeing more effective than others. Some have close radialclearances between the stator and rotor which may touch,or even seize when using a VFD.Fig. 2Seal water from H.E.pumping ringHEATEXCHANGERShell CoolingWaterFig. 3Best practice as prescribed by Section 8.6.2.3 of API-6823rd Edition stipulates that radial clearances between thestator and rotor should be at least 1.5 mm (Fig. 4).By way of example, if a stainless steel rotary componentcontacted a stainless steel stationary component, ‘galling’would occur. Notwithstanding this, some doublemechanical seals are designed with radial clearancesbetween 0.25mm and 0.5mm. This is in contradiction toAPI-682 (3rd Edition), which is technically correct as shaftsare known to deflect.The tapered vane pumping ring depicted in Fig 5consistently delivered more flow and head compared withall other pumping rings when tested by AESSEAL ® . Thistapered vane pumping ring design has been featured in thedesign of over 20,000 double mechanical seals sold since2000. Importantly, but unlike some other designs, itconforms to Section 8.6.2.3 of API-682 (3rd Edition).Furthermore, it is specifically advantageous for VFDapplications, ensuring that the mechanical seal pumpingring continues to circulate fluid throughout the speedenvelope of the pump.In summary, VFDs will become increasingly popular asPlant Engineers strive to generate process improvementsand reduce energy consumption. Mechanical seals used insuch applications need to be carefully selected againstoperating conditions (considered throughout the life of thepump). Some seal designs are more capable than others ofwithstanding the associated speed envelope. Such amechanical seal should have key attributes andcapabilities. These include:i) Contact seal face technology. This is better suitedto the wide range of shaft speed applications.ii) Stationary mechanical seals which have springs inthe stator part of the seal rather than the rotating partof the seal are better suited to high shaft speedapplications. Stationary mechanical seals are oftenfound on VFD duties.iii) Mechanical seal pumping rings which comply withAPI-682 (3rd Edition) specification and deliverthe highest amount of fluid flow.Fig. 5The effect of radial clearanceClose radial clearances between counter-rotating surfacescan lead to component contact stator(gland)and ‘galling’ or bindingof the material.rotor(rotary face)Fig. 4Figure 1: A dual stationary mechanical seal - source: AESSEAL plc (Design: CAPI A1 dual).Figure 2: A conventional rotary mechanical seal.Figure 3: A single stationary plan 23 mechanical seal – source: AESSEAL plc (Design SMSS23).Figure 4: The radial clearance requirement between the mechanical seal rotor and stator, as outlined byAPI-682 Section 8.6.2.3.Figure 5. Top: view of a typical tapered vane pumping ring; Bottom: typical position of a bi-directional taperedpumping vane device within the dual seal barrier/buffer cavity of a pump (source: AESSEAL plc).www.aesseal.com15

Our Purpose: ‘To give our customers such exceptional service that they need never consider alternative sources of supply.’AESSEAL plc, Rotherham, UK Tel: +44 (0) 1709 369966 rotherham@aesseal.comAESSEAL plc, Derby, UK Tel: +44 (0) 1332 366738 derby@aesseal.co.ukAESSEAL plc, Peterborough, UK Tel: +44 (0) 1733 230787 peterborough@aesseal.co.ukAESSEAL plc, Hamilton, UK Tel: +44 (0) 1698 540422 scotland@aesseal.co.ukAESSEAL plc, Middlesbrough, UK Tel: +44 (0) 1642 245744 northeast@aesseal.co.ukAESSEAL plc, Upminster, UK Tel: +44 (0) 1708 256600 se@aesseal.co.ukAESSEAL plc, Pontypridd, UK Tel: +44 (0) 1443 844330 ponty@aesseal.co.ukAESSEAL plc, Warrington, UK Tel: +44 (0) 1925 812294 warrington@aesseal.co.ukAESSEAL (MCK) Ltd, Lisburn, UK Tel: +44 (0) 28 9266 9966 salesmck@aesseal.co.ukAESSEAL Ireland Ltd, Lisburn, UK Tel: +44 (0) 28 9266 9966 sales.ireland@aesseal.co.ukAESSEAL Ireland Ltd, Co Cork, Eire Tel: +353 (0) 214 633477 sales.ireland@aesseal.comAESSEAL Inc, Rockford, TN, USA Tel: +1 865 531 0192 knxadmin@aesseal.comAESSEAL Inc, Kingsport, TN, USA Tel: +1 423 224 7682 kportadmin@aesseal.comAESSEAL Midwest Inc, Marion, IA, USA Tel: +1 319 377 0170 midwest@aesseal.comAESSEAL Inc, NE, Fairfield, ME, USA Tel: +1 207 453 6915 neadmin@aesseal.comAESSEAL Inc, NW, Longview, WA, USA Tel: +1 360 414 0118 nwadmin@aesseal.comAESSEAL ALAA, Dammam, Saudi Arabia Tel: +966 3 847 0033 sales.aesseal@afi.com.saAESSEAL Argentina SA, Buenos Aires, Argentina Tel: +54 11 4744 0022 aesseal@aesseal.com.arAESSEAL Australia Pty Ltd, Seventeen Mile Rocks, Australia Tel: +61 7 32791144 customer.service@aesseal.net.auAESSEAL Benelux BV, Breda, Holland Tel: +31 (0) 76 564 9292 seal@aesseal.nlAESSEAL Brazil Ltda, São Paulo, Brazil Tel: +55 11 5891 5878 aessealbrasil@aesseal.com.brAESSEAL Canada Inc, Vancouver, Canada Tel: +1 604 535 7512 vanadmin@aesseal.comAESSEAL Chile SA, Providencia Santiago, Chile Tel: +56 2 2343022 aesseal@aesseal.clAESSEAL China Ltd, Ningbo, China Tel: +86 (0) 574 8823 2888 service@aesseal.com.cnAESSEAL Colombia S.A., Bogota, Colombia Tel: +57 (1) 634 9095 info@aesseal.com.coAESSEAL Czech sro, Brno, Czech Republic Tel: +420 543 212 489 aesseal@aesseal.czAESSEAL Danmark, A/S, Køge, Denmark Tel: +45 56 64 14 00 mail@aesseal.dkAESSEAL Deutschland AG, Bad Orb, Germany Tel: +49 (0) 6052 918810 info@aesseal.deAESSEAL Deutschland GmbH, Kronau, Germany Tel: +49 (0) 7253 8090 gmbh@aesseal.deAESSEAL Finland OY, Muurame, Finland Tel: +358 1433 84500 aesseal@aesseal.fiAESSEAL France SARL, Nieppe, France Tel: +33 320 172850 aes.info@aesseal.frAESSEAL India Pvt. Ltd, Pune, India. Tel: +91 2113 302222 aesseal@aesseal.inAESSEAL India Pvt. Ltd, Hyderabad, India. Tel: +91 40 2309 2999 indiainfo@aesseal.inAESSEAL India Pvt. Ltd, Chennai, India. Tel: +91 44 2481 7786 chennai@aesseal.inAESSEAL India Pvt. Ltd, Visakhapatnam, India. Tel: +91 891 2792 722 vizag@aesseal.inAESSEAL Coldweld Pvt. Ltd, Vasai (East), Thane, India. Tel: +91 0250 2453220 mail@aescoldweld.comAESSEAL Italia SRL, Gallarate, Italy Tel: +39 0331 799 952 info@aesseal.itAESSEAL Malaysia, SDN BHD, Selangor, Malaysia Tel: +603 806 21233 selangor@aesseal.com.myAESSEAL Malaysia, SDN BHD, Pahang, Malaysia Tel: +609 583 6133 kuantan@aesseal.com.myAESSEAL Malaysia, SDN BHD, Johor, Malaysia Tel: +607 388 8323 johor@aesseal.com.myAESSEAL Mexico, S de RL de CV, Mexico City, Mexico Tel: +52 833 226 9551 info-support@aessealmx.comAESSEAL Norway AS, Oslo, Norway Tel: +47 2273 6849 aesseal@aesseal.noAESSEAL Polska, SP ZO.O, Bielsko Biala, Poland Tel: +48 33 818 4135 aesseal@aesseal.com.plAESSEAL Univeda LDA, Lisbon, Portugal Tel: +351 217 969212 geral@aesseal.ptAESSEAL Russia, Koroliov City, Moscow, Russia Tel: +7 495 777 4011 aesseal@podlipki.ruAESSEAL Pty Ltd, Durban, South Africa Tel: +27 (0) 31 903 5438 durban@aesseal.co.zaAESSEAL Pty Ltd, Johannesburg, South Africa Tel: +27 (0) 11 466 6500 admin@aesseal.co.zaAESSEAL Ibérica SL, Tarragona, Spain Tel: +34 977 55 43 30 info@aesseal.esAESSEAL Sweden AB, Stockholm, Sweden Tel: +46 (0) 8 55602870 kundservice@aesseal.seAESSEAL Vo Lee Ltd, Kaohsiung City, Taiwan Tel: +886 7 310 0630 info@aesseal.com.twAESSEAL Turkiye, Istanbul, Turkey Tel: +90 (0) 216 304 0237 info@aesseal.com.trAESSEAL Uruguay, Montevideo, Uruguay Tel: +598 2 916 1040 ventas@aesseal.com.uyAESSEAL ® is a Registered Trademark of AESSEAL plc AESSEAL plc recognises all trademarks and trademark names as the property of their owners. Copyright © 2009 AESSEAL plc Ref: L-UK/US-ORACLE-23 AES/DOC/IN 5119 06/09web: http://www.aesseal.comemail: seals@aesseal.comDue to continuously fluctuating exchange rates this document assumes that UK £1 is equal to US $1.55 / €1.1