Gasketed Plate Heat Exchangers - Alfa Laval
Gasketed plate heatexchangersAlfa Laval gasketed plate heat exchangersare the most cost-effective solutionavailable for HVAC heating and coolingapplications.Our gasketed plate heat exchanger rangeis the result of decades of experience,research and development in heat transfertechnology. By combining innovative designwith high quality we guarantee maximumperformance with minimum operating costs.At a quick glance the design may seemtraditional, but when studying the plates,gaskets and frames in detail the superiorityof Alfa Laval gasketed plate heat exchangersbecomes obvious. Attention to detail iswhat gives Alfa Laval the winning edge.Our products and our sales and serviceorganization make Alfa Laval the idealbusiness partner, as well as theunquestioned world market leader.
Alfa Laval supplied the first plate heat exchangersto the dairy industry in 1931. Plates were 5-10 mmthick with a milled pattern, compared to 0.4 mm today.In developing our range of plate heat exchangers, wehave focused on cost-efficiency.Reasons to buy gasketed plate heat exchangersfrom the market leaderAlfa Laval’s gasketed plate heatexchangers are designed to meet thehighest expectations when it comes toenergy efficiency, compactness andreliable performance.High energy efficiencyWith innovative plate design, weprovide superior flow distributionacross the entire plate surface. Thisresults in excellent heat transfer andhigh energy efficiency thanks to theelimination of stagnant zones andreduced risk of fouling.Compact sizeThe compact design of our gasketedplate heat exchangers makes it easy tofit compact spaces. They comeequipped with all features needed foreasy installation and quick start-up.Reliable performance over timeDepending on fluid types, pressuresand temperatures, Alfa Laval gasketedplate heat exchangers are tailored tomeet highest expectations onperformance and lifetime. Alfa Lavalgasketed plate heat exchangers arealso available as AHRI performancecertified versions called Alfa LavalAQ-series. The performancecertification is according to AHRIStandard 400 and is verified in theAHRI Liquid to Liquid Heat Exchangercertification program, LLHE.Easy and safe maintenanceOur gaskets and plate pack alignmentdesign provides easy and cost effectivemaintenance. The frame is equippedwith features that support the unit andsecure safe opening and closing duringservice.
Alfa Laval gasketed plate heat exchangersprovide heating and cooling for FederationComplex Towers, Moscow, Russia.InsightsYou need to put quality and reliability inan economic context. It’s about how tomake processes more efficient, whilesaving energy. About how optimizedperformance gives customers the bestoperating economy. And about how tominimize impact on the environmentand climate change.Above all it is tackling the need to buildlong life into equipment to minimizetotal cost of ownership and maximizeprofitability. Why governs how.Energyefficiencyat its peak69These are the insights Alfa Laval isusing to build gasketed plate heatexchangers. Take a closer look behindthe surface. There’s more to see thanwhat meets the eye – actually there’s awhole story to tell.
PlatesCarrying bar slotInlet / outletDistribution area“Chocolate pattern”Heat-transfersurfaceSealing systemThe heat-transfer surfaceThe heat exchanger plates are pressedin a so-called herringbone corrugationpattern. When two plates are super imposed with opposing herringbonepatterns, this type of corrugationgenerates a helix-like flow with very highturbulence, thus producing the essentialcondition for achieving high transfercoefficients and effective heat exchangerself-cleaning. By changing the platecorrugation pattern, the heat exchangercan be used in different processes,even those with very dirty media.Dead spots, that are the main cause ofcorrosion and fouling, are eliminated.Customers will benefit from reducedmaintenance cost and increased uptime.Special platesDouble-wall platesDouble-wall gasketed plate heatexchangers are ideal for use with fluidsthat must not be allowed to mix.Pairs of identical plates are laser-weldedThe distribution areaThe plate distribution is pressed in a socalled chocolate pattern, an Alfa Lavalinnovation. This type of corrugation hasnumerous advantages. Among the mostimportant are; it optimises flow distribution over the entire transfer surface,ensuring highest energy efficiency.around the ports. The gasket is installedin the conventional manner and thewelded plate pairs are assembled in aplate pack in the same way as ordinarysingle plates.In the unlikely event of leakage througha plate because of a puncture or crack,the leaking fluid will never come intocontact with the fluid in the other circuit,as it will be stopped by the double plateand flow outside the heat exchanger.External leakage if thereis a weld or gasketdefectExternal leakage if there is ahole in one plateWelded porthole
The world’s tallest building stays cool inthe scorching desert sun thanks to aninnovative thermal ice-storage system andAlfa Laval gasketed plate heat exchangers.Burj Khalifa, Dubai, United Arab Emirates.Carrying bar slotPerpendicularcorner guidanceInlet / outletDistribution areaAlfa Laval CurveFlowTMHeat-transfersurfaceSealing systemNew plate innovationsAlfa Laval CurveFlowTMThe new design of the distribution areameans superior flow distribution andmore of the available pressure dropover the main heat transfer area.This results in a number of benefits forthe customer:– A more compact heat exchanger –less plates needed.– Increased energy efficiency – betterflow distribution reduces the risk offouling build up, reducing the needfor increased pumping power tocompensate for higher pressure drop.– Reduced maintenance costs – fewerplates mean faster cleaning and lowcost for spares.Up to 15% higher efficiencyWith the new Alfa Laval CurveFlowTMdesign the media is more optimaldistributed over the entire plate width.Additionally, the cross corrugationpattern between the distributionsurface and the main heat transfer areagives improved heat transfer. Comparedto a traditional plate design it is alsopossible to use thinner plates at highpressures. Total improvement of theheat transfer efficiency is up to 15%.Higher flow capacityThanks to the non-circular ports, theport area in the plate has increasedcompared to a conventional circulardesign. This equals to higher flowcapacity at the same velocity, allowinghigher utilization.Up to 40% improvement in selfcleaning capabilityThanks to the new Alfa LavalCurveFlowTM design the media willhave up to 20% higher velocity at thefar end of the plate width. This willimprove the shear stress over the heattransfer area by up to 40%, thusminimizing the risk of fouling build-upat the most critical part of the plate.Perpendicular corner guidingThe new corner guiding design ensuresthat the plate pack is perfectly alignedindependent of the number of plates.A perfect alignment ensures a reliableperformance of the heat exchangerand faster closing of the unit afterservice.
Channel typesWe have two plate corrugations (L and H)These form three different channels (L, M, H)L: Low thetaL L L channelH: High thetaL H M channelH H H channelOptimal channel type is selected on the basis of the temperature program to be satisfied and the maximum permissiblepressure dropChannel characteristicsLow turbulenceand pressure dropMedium turbulenceand pressure dropHigh turbulenceand pressure drop“L” channels“M” channels“H” channelsAdvantages Efficient heat transfer High turbulence Variable thermal length Low pressure dropBenefits Increased heat recovery High self-cleaning coefficients Low heat-transfer surface area Low pumping costs
GasketsThe gaskets in Alfa Laval gasketed plate heat exchangers are parts of anadvanced hydraulic sealing system designed for high performance and longoperating life.Our gasket profiles produce a highly efficient seal, minimizing the risk ofleakage.The performance of a heat exchangeris influenced by different componentsand places very high demands on thegasket system. To obtain highestperformance, it is important that theplate and gasket are designed together.A correctly designed gasket has a highenough sealing force to prevent leakage,but not too high in order to preventgasket and gasket groove damages.Alfa Laval offers gaskets which arebased on the roof top gasket profile,as this has proven to be most effective.The rib top gasket family is the nextgeneration gasket developed byAlfa Laval. It is a further developmentof the traditional roof top gasket profile.Examples of Alfa Laval roof/rib top gasket familyThe roof on this next generation gasketis less edgy and there is a rib on top of it.The rib top profile with less rubbermass gives an outstanding sealing performance, reducing the risk of gasketand plate damages and leakages dueto plate misalignment.All gaskets are made from a singleuniform rubber by the best suppliers. Inaddition, they are moulded in one piece,guaranteeing exact gasket geometrywith no weak links from vulcanisation.Gaskets are available in a wide rangeof elastomers, the most common beingNitrile rubber and EPDM.Glue-free ClipGrip systemAlfa Laval was the first heat-exchangermanufacturer to develop and use theglue-free clip-on system that makes iteasier to replace gaskets duringmaintenance, thus saving time.Recently Alfa Laval introduced a newglue-free system called Alfa LavalClipGrip which improves the gasketfastening and sealing reliability evenfurther.Gasket groove design ensuresminimum contact between the gasketand the media, helping extend the heatexchanger's operating life. The grooveon the plate and the gasket matchperfectly, ensuring that the gasket isfully supported.Glue-free Clip-on system
FrameDesigned with lowest costof ownershipThe frame features will ensure: Reduced maintenance cost Reduced spare part costs Staff safety Time savingsAlfa Laval gasketed plate heat e xchangersof all sizes can be opened quickly andeasily for inspection and gasket replace ment by one man using standard tools.They are reassembled just as easily.Our large units feature Alfa Laval’s5-point alignment system. Precisepositioning of the plates horizontallyand vertically ensures efficient sealingthroughout the plate pack. A roller onthe pressure plate, and bearing boxeson the four tightening bolts, makeopening and closing an easy task.Simpler in design, our smaller gasketedplate heat exchangers are equally service-friendly, while keeping costs toa minimum. During reassembly, alignment of the plate pack is achievedusing the round carrying and guide bar.Corner guides lock the plates in positionand ensure perfect final a lignment.Bearing box – makesopening and closing the heatexchanger easier – willreduce maintenance timeand increase staff safety.Key hole bolt openingreduce risk of tighteningbolts falling out and allowsbolt to be removed sideways– will reduce installation andmaintenance cost andensure staff safety.5-point alignment systemand perpendicular cornerguidance. Perfect platealignment avoiding platepack leakages and additionalnecessary openings &closings of the plate heatexchanger – will reducemaintenance time and sparepart cost.Lock washer requires oneman instead of two to loosenthe tightening bolts andreduce the risk of bolts fallingout – will reduce maintenancecost and increase staff safety.Elongated nuts reduce nutsseizing on tightening bolt –will reduce cost formaintenance and spare parts.
Stainless-steel roller assemblyto facilitate opening and avoidwear & tear on carrying barBolted construction (no welded parts)allowing field assembly and futureexpansionConnections are availablewith metal linings, rubberlinings or unlinedLifting lugs or lifting holes forsafe & easy handlingIn single-pass units:All connections in frame plateenables maintenance withoutdisconnection of pipingIn multi-pass units:Blind flanges & inspectioncovers availableStudded port allowingincreased pipe loadsBolted feet for increasedstability and fixing to the floorFrame standards ASME, U and UM PED/CE marking Alfa Laval standard forother, local PV rules.
Whenperformanceis crucialAlfa Laval AlfaQ AHRI-certified gasketed plate heat exchangersWhen performance is crucial, eachcomponent of an HVAC system mustbe optimized to perform exactly asspecified.The Air Conditioning, Heating andRefrigeration Institute (AHRI) Standard400 certification is an independent,third-party verification of thermalperformance. AHRI 400 is now a globalstandard, assuring customersworldwide that the heat exchangersthey choose will perform according tospecification.Performance certification verifies thatthe product performs in accordancewith the manufacturer’s publishedratings, and is particularly useful inapplications such as district-coolingsubstations with plate heat exchangers,ice-storage systems, data centres andfree-cooling systems.Alfa Laval was the first to offer a broadrange of heat exchanger innovations –the AlfaQ range – that are certified toAHRI 400.Certification leads the “green” waveAHRI-certified heat exchangers canmeet the Leadership in Energy andEnvironmental Design (LEED) standardsfor heating and cooling applications.LEED is an internationally recognizedmark, providing building owners andoperators with a framework foridentifying and implementing practicaland measurable green building design,construction, operations andmaintenance solutions.Through its certification program andstandards, AHRI strives to helpcustomers save energy, improve theirproductivity and contribute to a betterenvironment.AHRI Certification Proceduresand BenefitsPerformance deficiencies in an HVACsystem are difficult to detect and canresult in much higher energy costs.Certification of all components assuresthe buyer that the system will performoptimally.To certify a product to AHRI standards,the manufacturer submits specificationsand performance data to AHRI forperformance evaluation and potentialcertification.The certification assures buyers andusers that:– The gasketed plate heat exchangerwill perform in accordance with themanufacturer’s published ratings.– Product performance can be easilycompared for their specificapplication.Alfa Laval has accomplished a 100%success rate in the AHRI performancecertification program for more than adecade.Cost-effective for everyone involvedConsultants– Allows for the design of a system inwhich all the major components areindependently performance certified,ensuring that targets on powerconsumption and climate control canbe met.– Provides a verifiable basis for heatexchanger selection.– Protects the owner and consultingengineer from performance concernsduring commissioning and afterinstallation.Contractors– Eliminates field acceptance tests ofeach component, thereby reducingpayment hold-back times aftercommissioning.– Ensures that all certified gasketedplate heat exchangers included inproposals will deliver the statedthermal performance.– Reduces troubleshooting time duringcommissioning and after start-up.End users– Reduces lifetime operating costssignificantly by assuring a moreenergy-efficient system.– Ensures full investment value byreducing costs for field tests andadditional component performancemargins.
Alfa Laval AlfaQ gasketed plate heat exchangers, the optimal choiceAlfa Laval’s broad range of heatexchangers for HVAC applicationsinclude gasketed, semi-welded, fullywelded, double-wall plate, and brazedheat exchangers. The AlfaQ Seriesare part of our gasketed plate heatexchanger portfolio.AlfaQ gasketed plate heat exchangersare available to meet most heat-transferrequirements – whether large or small– and include a three-year warranty,demonstrating our commitment tooptimizing the performance of ourcustomers’ processes.AlfaQ Series is the optimal choicewhen performance is crucial.
InsulationInsulationInsulation, designed for HVAC appli cations, is available for most gasketedplate heat exchanger models. Thereare two different types of insulation –heating and cooling insulation.The reason for having two differenttypes is that the mineral wool will bewet from condensing water if usedwhen the heat exchanger temperatureis lower than the surrounding temperature. Polyurethane is more expensivethan mineral wool, but technically thecooling insulation can be used forheating duties as well.Drip trayThe Alfa Laval drip tray insulates theheat exchanger from the floor, and italso collects any condensate formedon the outside of the heat exchanger.The drip tray also collects any remainingwater (after drainage) in the gasketedplate heat exchanger when the unit isopened for inspection or maintenance.The drip tray consists of 0.75 mm hotgalvanized steel plates, 50 mm polyurethane foam, supports of waterproofwood, and a draining valve.Heating insulationHeating insulation consists of 65 mmof mineral wool, cladded with a 1 mm aluminium sheet on the outside and aluminium foil on the inside. It covers allsides of the gasketed plate heat exchangerincluding the frame and pressure plate,except downwards. The different parts areheld together with snap catches.Cooling insulationCooling insulation consists of 60 mmof polyurethane, cladded with a 1 mm aluminium sheet on the outside and aluminium foil on the inside. It covers allsides of the gasketed plate heat exchangerincluding the frame and pressure plate,except down wards, where there is agalvanized drip tray. The different partsare held together with snap catches.Protection sheetA protection sheet is a device covering all sides of the plate pack exceptdownwards. It is used to prevent persons from getting injured if a sudden leak of hot, corrosive or toxicmedia should occur. The Alfa Lavalprotection sheet consists of one ormore aluminium or stainless-steel(AISI 304) sheet(s) formed to fit thegasketed plate heat exchanger.On most frames the sheet is fittedbetween the plate pack and the tightening bolts.
Alfa Laval ServiceExtending performanceAlfa Laval’s global service networkensure optimal performance of yourAlfa Laval equipment throughout its lifecycle. To bring you maximum uptimeand return on investment, our committed team draws on 130 years of process and application knowledge.Our goal is to optimize the performanceof your process by for instance redesigning your gasketed plate heatexchanger to match your new processrequirements or reconditioning it to agood-as-new state, thus making sureto maximize uptime.But we go even further. We also ensureour top-class service engineers are withyou when and where you need them,at your site or in our service centres.Complete 360 Service Portfolio for gasketed plate heat exchangersStart-up– Installation– CommissioningMaintenance– Reconditioning– Cleaning services– Service tools– Spare partsSupport– Telephone support– Exclusive stock– Training– Troubleshooting– Technical documentationImprovements– Equipment upgrades– Redesign– Replacement & RetrofitMonitoring– Performance Audit– Condition AuditReconditioningReconditioning your gasketed plateheat exchanger can extend its lifetime;minimize operational costs; ensuresafety, quality and productivity; andsatisfy new environmental legislation byimproving energy efficiency.You can choose from a number of predefined reconditioning packages, orcustomize a package from the completelist of Alfa Laval reconditioning services,to match your requirements for turn around time, budget, brand and/orapplication.Spare partsCorrect material quality can make a hugedifference to your process. By usinggenuine Alfa Laval Spare Parts you canrest assured that the correct material isspecified according to its intended use.Alfa Laval genuine plates are made usinga single-step pressing method ensuringuniform plate strength and thicknessover the entire plate – dramaticallyreducing the risk of fatigue cracking.Alfa Laval genuine rubber gasketsensure tighter seals, longer life andmore uptime for gasketed plateheat exchangers.Uptime – skilled experts assist youwith proper service that preventsunplanned interruptions, using certifiedmaterials.Availability – we are committed toproviding easy access to specialistsupport and the right parts for yourAlfa Laval equipment.Optimization – our innovative servicesand solutions are available to help yourexisting equipment adapt to yourevolving needs.
Ten top tipsTo keep your gasketed plate heat exchanger in tip top condition1Make sure that the operating conditions(temperatures and flow rates) comply with thedesign specifications.2At start-up, vent the heat exchanger but open andclose the valves slowly to avoid pressure surgesand water hammer.34Use upstream filters and strainers to removeparticulate fouling and protect the heat exchanger.56On a regular basis keep the tightening bolts cleanand well-lubricated.7Use Cleaning-In-Place (CIP) to avoid the need toopen the heat exchanger for cleaning.On a daily basis check for any changes intemperature or pressure and check for any signsof external leaks.Use condition monitoring techniques to avoidhaving to open the gasketed plate heat exchangerfor inspection.Carrying barFrame plate8Always keep stand-by units clean and dry. If aheat exchanger is taken out of service, flush withfresh water and drain it completely.9Protect heat exchangers from water splash andrain. Avoid exposure to ultra violet rays and ozonetypically generated from electrical sources.10Only use genuine spare parts for guaranteedperformance, reliability and equipment life.Maintain a stock of essential spare parts andfollow the storage instructions.Alfa Laval ServiceExtending PerformancePressure plateTightening boltsPlate with gasket
gaskets and frames in detail the superiority of Alfa Laval gasketed plate heat exchangers becomes obvious. Attention to detail is what gives Alfa Laval the winning edge. Our products and our sales and service organization make Alfa Laval the ideal . business partner, as well as the unquestioned world market leader.
Make Model Year 1 Year-over-year Year Comments ALFA ROMEO Alfa Romeo GIULIA 2017 2017-Alfa Romeo GIULIA 2018 Alfa Romeo GIULIA 2019 Alfa Romeo GIULIA 2020 Alfa Romeo STELVIO 2018 2018-Alfa Romeo STELVIO 2019 Alfa Romeo STELVIO 2020 Alfa Romeo GIULIETTA VELOCE 2019 2019-Alfa Romeo GIULIETTA VELOCE 2020 ALPHINA Alphina B3 S BITURBO 2014 2014-2017 Alphina B3 S BITURBO 2015 Alphina B3 S BITURBO .
Gasketed Plate Heat Exchangers Hxxx-LIQUID Gasketed plate heat exchangers are particularly suitable for large flows and high cooling capacities. The stack of heat transfer plates and gaskets is clamped together with bolts in a frame. This means that the plate heat exchanger can also be dismantled for cleaning and maintenance.
Brazed Plate Heat Exchangers 2 Smaller, lighter, stronger and more efficient. Lowara Brazed Plate Heat Exchangers are ideal for residential and light commercial hydronic systems because they provide maximum heat dissipation from a compact, lightweight heat exchanger. Unlike conventional shell and tube heat exchangers, our units can be used
support during the design phase, the installation phase and after sale. Gasketed exchangers Our gasketed plate heat exchangers have the follow-ing features: designed to improve the exchange performance and to reduce and simplify the maintenance operations; use of high quality materials which can be paired with
This standard applies to Liquid to Liquid Heat Exchangers as defined in Section 3, which includes the following types of heat exchangers: 2.1.1 Plate heat exchangers 2.1.2 Shell-and-tube heat exchangers 2.1.3 Shell-and-coil heat exchangers 2.1.4 Shell-and-U-Tube heat exchangers 2.2 Exclusions. This standa
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Heat exchanger: It is a device that provides exchange of thermal energy between two or more fluids at different temperature. Types of heat exchanger:-1. Double-Pipe heat exchangers 2. Shell and tube Heat Exchangers 3. Compact heat exchanger 4. Gasketed Plate heat exchanger 5. Condenser and evaporator 2
TO GROUP WORK PRACTICE, 5/e. 64 3 Understanding Group Dynamics The forces that result from the interactions of group members are often referred to as group dynamics. Because group dynamics influence the behavior of both individual group mem-bers and the group as a whole, they have been of considerable interest to group workers for many years (Coyle, 1930, 1937; Elliott, 1928). A thorough .
