“Facing tomorrow’s challenges through today’s vision and leadership in engineering, quality and performance”

Experience

Engineering

Seventy years of historyOver thirty engineers on staff with an average of 15 years experience specializing in these fieldsCross trainingStructured technical development program

Engineering

Heat Transfer Research Inc.Heat Exchange Institute

Surface CondenserSteam Jet EjectorLiquid Ring Pump

Tubular Exchanger Manufacturers AssociationElectric Power Research Inc.American Petroleum InstituteAir Conditioning & Refrigeration Institute

Research & Development

Continuously pursue enhancement of existing or the development of new products. Focus is on market driven requirements.

– Heat transfer– Ejector– Liquid Ring Pump– Dry Vacuum Pump

Manufacturing

Manufacturing in Batavia,N.Y.

Quality

ANSI/ISO/ASQC Q9001 compliant planASME Section VIII, Div 1 programChinese Pressure Vessel Safety LicenseGQST

“Quality is our strategy for assuring long term growth and profitability. We will strive for continuous improvement and total customer satisfaction.”

Products

Heat transfer– Plate heat exchangers – Heliflow– Water Heaters– Clean Steam Generators– Desuperheaters– Cryogenic vaporizers– Vent condensers– Seal coolers– High pressure HEX’s

Products

Vacuum–Surface condensers–Ejector systems–Liquid ring pumps–Hybrid systems–Process condensers–Barometric condensers –Atmospheric relief valves–Dry vacuum pumps

Factors in Choosing a PHE

Heat transfer rate / efficiencyDesign pressureDesign TemperatureTemperature CrossingCorrosive FluidsParticles in FluidsViscous fluids or slurriesCleanability

Graham GPHE’s

Graham Corporation

“ Graham has your solution on a plate”

How it Works

How it Works

High turbulenceTrue counter current flow pathLow foulingHighest heat transfer coefficients

High Efficiency

Surface Area = QU x LMTD

Q = Heat transfer dutyU = Overall heat transfer coefficientLMTD = Log mean temperature difference

= ( Thot in – Tcold out ) – ( Thot out – Tcold in )ln ( Thot in – Tcold out )

( Thot out – Tcold in )

Heat Transfer - Shell & Tube

Heat Transfer Coefficients

Application Shell & Tube PlateWater / water 250 1500Steam / water 350 1500SAE 30 Oil / water 60 150#6 Fuel Oil / water 20 5050% E.G. / water 150 1000

Flow Arrangements - PHE

Port Area Inlet

Void AreaDistributionArea

Main Heat Transfer Area

Leakage Groove

Distribution Area

Outlet

Flow Arrangements - PHE

Single PassSingle Pass

Flow Arrangements - PHE

Multi-Pass

Corrugation Types - PHE

“H”

High

Theta

60 deg

“L”

Low

Theta

30 deg

Flow Arrangements - PHE

H – H H – L L - L

Heat Transfer Rate

Heat transfer coeffecientsApplication S & T PlateOil cooler 100-150 250-300Water/Water 400-500 1400-1500Plate heat exchanger smallerLess volume for plate heat exchanger

PHE Benefits

HIGH HEATTRANSFER

COEFFICIENTS

COMPACTDESIGN

LOWERVOLUME

LESSMATERIAL

LOWESTINSTALLEDCOST!

Factors in Choosing a PHE

Design PressureDesign TemperatureTemperature CrossingCorrosive FluidsParticles in fluidsViscous fluids or slurriesCleanability

Counter Current Flow

LMTD

PRICE

PHE Benefits

COUNTER CURRENT

FLOWCLOSERAPPROACHTEMPERATURE

TEMPERATURECROSSING

GREATERHEAT

RECOVERY

LOWERENERGYCOSTS!

Corrosive Fluids

Cooling water quality: 304SS=50 ppm Cl, 316SS=150 ppm Cl and Titanium > 150 ppm ClAlmost any plate material availableCompressed fiber, PTFE, semi-welded, all-welded and brazed are viable solutions

Particles in the Fluids

What is the size and concentration of the particles?– Standard plates can pass particles that

are 75% of the free channel– Provide an appropriate strainer in the

inlet line to the heat exchanger– Fluid with particles should flow

downward– Provide back flushing system to

periodically clean the unit

Fouling Factors

Application of shell & tube type fouling factors to PHE’s– S & T water cooler has a UC of 300 and by adding

0.001ff results in a UD of 230 or 13% excess surface– For the same application a PHE would have a UC of

1500 and by adding 0.001ff results in a UD of 600 or 60% excess surface

– The PHE is heavily penalized despite having turbulent flow on both sides

– Fouling in a PHE will actually increase as plates are added to meet this ff and velocities between the plates are substantially reduced

Fouling Factors

If a concern the normal procedure is to add 10% excess surface to the heat exchanger selectionFor constantly fouling services a Clean In Place system may be used or a stand by unit may be offeredHeavily fouled units can be easily taken apart for mechanical and/or chemical cleaning of the plates

PHE Components

Carrying Bar

Tightening Bolts

Plates / Plate Pack

Rear Support Column

Guiding Bar

Movable Cover

Connection Port

Fixed Cover

PHE Benefits

ALLBOLTED

CONSTRUCTION

MECHANICALCLEANINGPOSSIBLE

EASYSERVICING

LOWERMAINTENANCECOSTS!!

REDESIGNCAPABLITY

Features & Benefits

ADVANTAGE

Advantage: The Plates

Plate Geometry

Superior fluid distribution below port areas for even flow distribution & better heat transfer

Neck area below port is designed for low pressure drop and low velocity for errosion protection

Heat transfer is optimized in main area with tighter plate patterns resulting in less dead spots

Plate Geometry

OLDNEW

Plate Depth

Plate thicknessMinimum tightening dimensionPressure ratingHeat transfer rate Plate applications

Plate Depth

0.078” Minimum

0.15” Traditional

0.625” Wide Gap

Plate Geometry

“H” high and “L” low style plates

Two depths available for four sizes

Options to optimize any heat transfer application

Plate Geometry

Units with port sizes 4” and smaller use a unique interlocking corner allignment system

Guarantees proper sealing of the heat exchanger

Plate Geometry

Units with port sizes 6” and larger use a unique five point allignment system

Guarantees proper sealing of the heat exchanger while allowing for easy assembly and disassembly

“Plate cannot

shift in any

direction.”

Plates

Plate Materials- 304SS, 316SS, SMO 254- Titanium, Titanium-Pd- Hastelloy, Incoloy, Nickel

Plate Patterns- H ( High-theta plate )- L ( Low-theta plate )

Plate Thicknesses- 0.4,0.5, 0.6, 0.7 mm

Double Wall Plate Geometry

Double wall plates protect one fluid from contaminating the other if a plate fails

Available in four models

Gasket Double Wall Plate

Air GapPotable Water

Boiler Water Plate Failure

Fluid leaks to

the outside.

Advantage: New Plate Designs

In house design & tool manufacturing

Two new models in last year

Graham Advantage: Plates

Many different plate styles: 2.5 to 11 mm deep

Parallel flow vs. diagonal

Optimum distribution area – No stagnant areas

Graham Advantage: Plates

Five point allignment system

Corner allignment systemOne time plate pressing/formingFull support of gasket

All those gaskets!!

Heat exchanger life expectency of gaskets is 5 years based on published dataGlueless gaskets make replacing them a snapImprovements in gasket design, both in shape and material, result in higher design temperatures and pressures and longer life

Advantage: Gaskets

Gasket failures always are to the outside of the heat exchanger

Gaskets

GLUELESS GLUED

Gasket sealing

Ridged gaskets

Higher sealing pressure

Better sealing of heat exchanger

Longer life and reliability

Graham Others

Gasket Materials

Nitrile ( Nbr )- oil, water, food & beverage service- 285 degF Max. operating temperature

EPDM- hot water, steam, dilute acid service- 338 degF Max. operating temperature

Viton G- aggressive chemicals, oil, fat service

- 320 degF Max. operating temp

Advantage: Frame Construction

Frame Features

Use thicker headers and larger diameter tightening bolts to minimize deflection and optimize sealing and pressure rating capabilities

Frame Features

ASME VIII using FEAAll bolted constructionZinc plated tightening boltsStainless steel or zinc coated guide & carry bars

Frame Features

Safety shield on every unit

Connection Styles

Standard

Optional

NPT Threaded NPT Threaded

W/ Alloy Nozzle

ANSI Studded ANSI Studded

W/ Alloy Liner

ANSI Flanged Sanitary Ferrule

Quick Disconnect

Frame Features

Easily disassembled for cleaningExpandable for future capabilitiesCompact design

Frame Features

Many different sizes1” to 14” connection sizeUp tp 450 psi working pressure

Optional Construction

Rigid insulation with drip tray

Cloth insulation

All removeable

PHE Certifications

ASME Section VIII- Possible Section III

EPRI – Specification for replacing S & T’s with PHE’s in nuclear power plants

HEI – Heat Exchange Institute

API – American Petroleum Institute

Internationally: Chinese, Korean & others

ARI

Standard 400

Liquid to Liquid Heat Exchangers

Installations

Installations

Installations

Installations

Graham Advantage

Engineering strength

Software programs to produce optimum heat exchanger selections

Proven installations

Proprietary now-how

100% U.S.A. manufacture including gaskets

Dry Vacuum Pump

Steam Jet Ejectors

Liquid Ring Pump System

Turbine Exhaust Condenser

Heliflow Heat Exchanger

Plate & Frame Heat Exchanger

Instantaneous Hot Water Heater

Multimedia Presentation “Vacworks”

Steam Generator

THE END