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U l t r a H e a t P l a t e a n d F r a m eHeat ExchangersEngineered for Excellence

Graham engineers analyzeyour specific vacuum andheat transfer requirements tomaximize the efficiency andperformance of your process.Because it’s not just aboutengineering products, it’s aboute n g i n e e r i n g a n s w e r s.

In 1943, Graham patented the Heliflow heat exchanger,which uses a coiled tube that provides higher durability than other designs,even in the most severe operating conditions. Graham engineers recognizedthe extreme efficiency of a pressed corrugated heat transfer plate and begancreating and producing plate heat exchangers in 1970.Through such forward thinking and relying on over 65 years of heat transferexperience, Graham continues to build tomorrow’s answers through today’svision and leadership in engineering and quality.Designed for performanceand reliabilityIn developing a line of plate heatexchangers, Graham engineers analyzedthe factors that contribute most to thesuccess of plate heat transfer andincorporated them into the UltraHeat plate heat exchanger line. The plategeometries for UltraHeat plate exchangerswere carefully chosen after examiningvarious plate depths, patterns and anglesto maximize heat transfer, hydraulicperformance and pressure ratings.UltraHeat Performance and ReliabilityGraham Corporation traces its history to the earliestdevelopment of heat transfer products in the United Statesduring the 1920s, when the foundation was established forthe engineering of heat transfer equipment. Incorporatedin 1936, Graham designed and built some of the first shelland tube heat exchangers ever made.UltraHeat plates are specially designedwith deep gasket grooves that securelyhold gaskets in place, rigid corrugationsand integral alignment featuresto guarantee trouble-free operationunder a variety of operatingtThicknessconditions. The result is thatUltraHeat plate geometriesoffer superior efficiency oroptimum functionality,depending on theP Pitchapplication requirements.bHeightO2Angle

UltraHeat Features and BenefitsHow the UltraHeat worksThe UltraHeat plate heat exchanger is an assembly of thin metal heat transfer plates with mechanically formedcorrugations that distribute fluid flow and form a perimeter gasket groove for fluid retention. The corrugatedpattern creates high fluid turbulence, resulting in high heat transfer coefficients and smaller surface areas.A true counter-current flow is produced, allowing temperature approaches to within 1 F of the opposing fluidand heat recovery in excess of 96 percent to be technically and economically feasible.The governing factor in determining the size of a heat exchanger is to determine the surface area required totransfer the specified heat from one fluid to another. Because the heat transfer duty (Q Btu/hr.) and the logmean temperature difference (LMTD, F) are fixed, the driving factor in deciding on the surface area or size isthe overall heat transfer coefficient U (Btu/sq.ft. F). Therefore, as the U value increases, the surface areabecomes smaller, reducing both the size and the cost of the heat exchanger.Surface Area QU x LMTDQ Heat transfer dutyU Overall heat transfer coefficientLMTD Log mean temperature difference ( T hot in - T cold out) - ( T hot out - T cold in)Ln ( T hot in - T cold out)( T hot out - T cold in)Advantages of the UltraHeatPlate and frame exchangers provide the highest efficiency mechanism for heat transfer available in the industrytoday. Graham UltraHeat plate heat exchangers offer several advantages over others on the market, including:Economical, Low-capital Investment:The UltraHeat plate heat exchanger uses specially designed heattransfer plate geometries and extremely turbulent flow to yield the most efficient high heat transfer rates withthe least required surface area. By employing pure counter-flow for closer temperature approaches,the UltraHeat plate heat exchanger offers maximum energy recovery with a lowoperating cost. Capital costs can be as much as 75 percent less than othertypes of heat exchangers.Easy to Install: Because all the connections are located inthe same plane and only three mounting points are required,installation is straightforward. Piping and setup are quickand inexpensive.Heavy-duty:The UltraHeat plate heat exchanger uses thickerpressure retaining heads and larger bolt diameters to guaranteetrouble-free heat exchanger operation and sealing. Thermal platesare designed with a maximum number of contact points wherepossible for higher pressure ratings and greater durability.Low Maintenance Costs: The turbulent flow across the heatexchanger plate minimizes – and in some cases eliminates –fouling. If maintenance or plate replacement is required,the all-bolted construction means less labor and downtime.Compact, Modular Design: The small size of the UltraHeatplate heat exchanger results in 75 percent less volume than otherheat exchangers. This means lower coolant costs, more precisetemperature control, reduced weight and easier drainage. It alsomeans less floor space is required, making it ideal for skid-mounted packages.3

The Graham UltraHeat gasketed plate heat exchanger line is engineered for optimum performance in anygiven application. Whether the goal is to maximize heat recovery from a warm water stream to a cold oneor to cool even the most viscous of slurries, Graham engineers can custom design an UltraHeat plateexchanger configured to your specific needs.UltraHeat plate heat exchangers are ideal for the following:HVAC ApplicationsWater Heaters: Using steam or high temperature water, Graham UltraHeat plate heat exchangers arean excellent choice for heating potable water or other fluids. The high heat transfer rate and corrosionresistance of stainless steel plates make these units uniquely suited for heating service.Cooling Tower / Heat Pump Isolation: The high turbulence of a Graham UltraHeat plate heat exchangerminimizes fouling in independent cooling tower systems. Should a plate become plugged, it can be easilydisassembled and cleaned. In addition, the plate exchanger can be used to protect the heat pump fromcontaminants in the water supply. It maintains a high degree of turbulence that is essential for reducingfouling and maintaining high heat transfer rates.UltraHeat ApplicationsThe right plate heat exchangerfor your jobFree Cooling: When ambient air temperature is cool enough to allow free cooling, the cooling tower watercan precool entering air, assist in mechanical cooling or provide total system cooling for the air conditioningsystem. A Graham UltraHeat plate heat exchanger is an essential part of the design of a free cooling system.Process ApplicationsChemical: The heat transfer plates and gaskets of the UltraHeat are available in a variety of corrosionresistant materials to withstand the most difficult and aggressive conditions. The UltraHeat is ideal forapplications such as acid and caustic heating or cooling; amine and other process interchanges; oil, gasand petrochemical refining; heating or cooling with brine; and isolating process water.Industrial: To eliminate downtime, an industrial process heat exchanger must be efficient, dependable,compact and easy to repair or clean. The UltraHeat plate heat exchanger is all that. For oil and jacket watercooling, paint and metal treatment, closed loop cooling and heat recovery, the UltraHeat is a proven performer.Food and Beverage: Smooth, trouble-free operation of the heat exchanger is critical for the food processmarket, which is why the UltraHeat offers a variety of plate chevrons and free-flowing patterns. Whether youare refining sugar, heating or cooling an edible oil or starch, or making beer, the UltraHeat has the ideal platepattern for the application.4

UltraHeat Frame FeaturesFeatures of the frameThe frame for the UltraHeat plate heat exchanger is engineered and built to the highest standardfor a long, dependable life under many operating conditions.Pressure-retaining covers are designed with the latest stress calculations per ASME.Thicker heads and larger diameter tightening bolts are used for a heavy-duty constructionthat results in a more uniform plate pressure and extended gasket life.Thicker covers mean fewer tightening bolts, which makes the opening and closingof the heat exchanger much faster and easier. No externalreinforcement of the covers is required.The tightening system is designed so allof the tightening is done from the front endof the heat exchanger. This allows for easierand quicker opening and closing of the unit.5The 100 percent bolted modular designed framecreates a great deal of flexibility for the operationand installation of the heat exchanger.

Connection Types – StandardThreaded(Internal)Threaded(External) AlloyStuddedStuddedAlloy LinedUltraHeat ConnectionsThe plate-carrying bars form an exact platealignment system to ensure an optimal sealbetween plates and gaskets.Units are provided with threaded- or studdedtype connections that are integrated with thefixed cover plate. This eliminates the risk ofdamage from piping loads that can occur whenflanged-type nozzles are used.Connection Types – OptionalFlangedAll units have a rear support columnfor additional unit strength and integrity.The rear pressure retaining cover ismoveable, which allows for easy access toand maintenance of the plate heat exchanger.A protective shroud covers the plates on every heatexchanger. It meets OSHA requirements and protectsthe plates and gaskets from external damage.FerruleAll frames are built fromASME code materialsand may be certified inaccordance with the codeas high as 400 psig designpressure and 350 F designtemperature.6

UltraHeat Plate FeaturesFeatures of the platesWith the UltraHeat plate heat exchanger, Graham offers moreplate styles and features than any other supplier and is certainto have a design to meet your specific application requirements.Each plate is stamped with the Graham logo to verifythat it is an authentic Graham product that is qualityengineered and manufactured for your requirements.On plate heat exchangers withconnection sizes of 4 inches orsmaller, the plates are perfectlyaligned by a four-cornerinterlock system.The glueless “U-clip”gasket design allows gasketsto be attached to the platesin a sound mechanical way,making them quick andinexpensive to install.External tabs provide aneasy visual check to ensuregaskets are in the properposition for sealing.The distribution areaof the plates is 10 to 20percent greater than atraditional plate, allowingfor even distribution of thefluid across the plate andminimizing pressure lossand erosion concerns.7A unique plate hanging system provides exact platealignment. The hanging portion of each plate has fourtabs to prevent left-to-right movement. Another singletab locks the plate to the upper carrying bar to preventvertical movement.The areas around the ports aredouble gasketed with a ventedair space between them. In theevent of a gasket failure, fluidleaks to the outside, preventingcross-contamination of fluids.

The performance capabilities of the UltraHeat plate heat exchanger are created by the following features:nThe heat transfer plates are formed with a single pressingmotion, which creates superior quality by eliminating thepossibility of tool misalignment.nnnHigh-efficiency plates have varying depthsand corrugation angles to optimize performancefor applications involving waters, glycols, oils,process fluids, and high and low viscosity fluidswithout solids.UltraHeat Performance CapabilitiesSuperior performance capabilitiesWide-gap plates allow straight flow throughchannels. This design is ideal for applicationsinvolving processes that might contain solidsthat would plug a more traditional plateheat exchanger.Double-wall plates have a leak detection path between twoplates to isolate products from cross-contamination.8