WORLD LEADER IN THERMAL ENGINEERING - Hisaka...

10

Transcript of WORLD LEADER IN THERMAL ENGINEERING - Hisaka...

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01 02

C O N T E N T

Effective utilization of resources, energy-saving and high production efficiency.

That's the Heat Exchanger Division's concept of research and development.

WORLD LEADER IN THERMAL ENGINEERING

As a specialist in thermal engineering with world wide presence, our vision is to promote the rational use of thermal energy. We have been developing versatile high performance products through the years of experience in the design and manufacturing of our Plate Heat Exchangers using innovative and leading technology.

Markets and ApplicationsChallenging rationalization of thermal energy.

HISAKA Plate Heat Exchangers are used for heating, cooling, heat recovery, heat exchanging, condensing, sterilization, etc.Our heat exchangers are successfully installed in all major industries such as chemical, food, steel, pulp & paper, industrial machinery, automobile, oil refinery, textile, ship, air conditioning and power plant.HISAKA Plate Heat Exchangers have always played a major role in thermal engineering as well as an energy saving equipment.

Global NetworkOriginal proprietary technology to overseas.

Since we started in 1953, a wide range of Plate Heat Exchangers have been developed, designed and manufactured using our own original technology and engineering.We have since then exported “plate production tech-nology” to many foreign licensees. On the other hand, worldwide supply network through representatives and our subsidiaries such as Malaysia, Thailand, Singa-pore, Indonesia, Vietnam, Philippines, China, Korea and Saudi Arabia has been also established.

Quality AssuranceWell established QMS conforming to ISO9001.

We conform to the most stringent quality assurance program as demanded by our international clients.

Our products meet with the highest engineering stan-dards and of the highest quality. As such, we conform to various international standards such as ASME, JIS, CE, etc.

Health, Safety and EnvironmentWe, HISAKA, take a proactive stance in Health, Safety and Environment issue conforming to ISO14001.

Hisaka Works, Ltd. / Konoike Plant

HISAKAWORKS S.E.A. / Kuala Lumpur

HISAKA WORKS (Chaina) / ChangshuSuper Jumbo PHE

Page Page

MULTI GAP PLATE …………………………………… 14

CONDENSING PLATE………………………………… 14

Hestia NX-50 ………………………………………… 15

DUAL WALL PLATE…………………………………… 15

MAINTENANCE ……………………………………… 16

WEB SIMULATOR …………………………………… 17

NETWORK …………………………………………… 18

PLATE HEAT EXCHANGER ………………………… 03

FEATURES …………………………………………… 05

PLATE ………………………………………………… 07

GASKET………………………………………………… 08

PLATE HEAT EXCHANGERS VARIATION ………… 09

APPLICATION ………………………………………… 11

SEMI WELDED PLATE ……………………………… 13

The World largest class 40,000ton Press machine

The cutting-edge full automatic 20,000 ton Press machine

The career 20,000 ton Press machine The latest 4,000 ton high speed automatic precision Press machine

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03 04

PLATE HEAT EXCHANGER

S-Frame E-Frame

Upper Guide-bar

Lower Guide-bar

Guide-bar Support

Tightening Bolts/Nuts

Nozzle

Plate Pack

Base Plate

The fixed frame.

Pressure retaining part to the

internal pressure.

The connection to piping. The

stud bolts are located around the

connection. Rubber and Metal

are available.

The heat transfer plates are

designed with a variety of raised

areas and channels to ensure

strength and increase the heat

transfer area.

Fixed firmly the foundation by

anchor bolts.

The movable frame.

Similar function to the S-Frame,

but hung on the upper guide bar

and movable.

Suspends the plates and

E-Frame plate. At the same time

functions as a positioning rail.

Tighten the S- and E-Frames,

pressing the plates and

gaskets together, to seal the

fluids.

Third leg that supports the rear

ends of the top and bottom

guide bars.

Rail that serves to position the

bottom edges of the plates and

E-Frame.

Construction Plate Heat Exchanger

D-Plate A-Plate B-Plate

Upper Guide-bar

E-Frame

Guide-bar Support

E-Plate

Lower Guide-bar

S-Frame

Tightening Bolts/Nuts

Lining

External Structure The heat transfer plates are thin sheets of corrosion resistant metal such as stainless steel or titanium that are press-formed with a corrugated pattern on the surface and sealed with synthetic rubber gaskets, which seals the flow channel and directs the fluid into alternate channels. Such plates are suspended, supported and aligned by guide bars and tightened by bolts between a fixed and a movable frame. The equipment can adjust the number of plates so as to meet the heat duty.

Flow of Fluid and Heat Exchange Mechanism Heat transfer A and B-plates are of identical pattern. One simply turned upside-down becomes to the other so as to obtain a dif-ferent flow channel by the gasket line. Further, by the start plate (D-plate) having its portholes with double seal gaskets and the blind last plate (E-plate), the construction is such that the fluids do not directly contact the frames.

NOZZLE SECTION

Boot Boot

Heat Transfer Plates Each heat transfer plate is corrugated to various patterns to increase its strength and heat transfer area. Furthermore, the corrugation creates high turbulence and thereby achieve high heat transfer coefficient. The plate is provided with passage hole on each corner. Each plate is tight-sealed with a gasket fitted in its peripheral groove.

Gasket

Heat TransferPart

Port Hole

Double Seal

Distribution

Hanger

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05 06

FEATURES

The plates are divided into A-plate and B-plate, and a pas-sage is formed between these plates. The high temperature fluid flows alternately and in the opposite direction of the other fluid. Thus high efficient transfer of heat is achieved

through these plates.A-plate when reversed would become B-plate. As such only one type of plate can be used as A-plate and B-plate for most models.

Hot side inlet

Front View Side View

Hot side outlet

Cold side outlet

Cold side inlet

Flow Channel

Single-pass connection arrangement

S-Frame

E-Frame

Multi-pass connection arrangement

Single-pass flow diagram Multi-pass flow diagram

S-Frame

Maintenance space required

E-Frame

It is necessary to

remove the

connected piping

when disassembling

the unit.

With single-pass design, all of the connections are made on the fixed frame side only. This simplifies piping work and in-creases layout flexibility. With a multi-pass design, connec-

tions are located on both the S-Frame (fixed-frame) and E-Frame (movable-frame) sides making it necessary to remove and adjust the piping.

Pass Design

Prevention of Liquid Inter-mixingSpecial consideration is taken into the gasket so as to protect it from direct attack by liquid. Furthermore, the gasket is of double-seal type so as to permit liquid draining outside the exchanger even in a case of liquid leak caused by its deterio-ration.

Easy MaintenanceThe plate heat exchanger can be easily opened for inspec-tion and maintenance by loosening the tightening bolts and nuts. Assembly and opening of the unit are also easily per-formed.

Steam Available as Heat SourceThe use of synthetic rubber gasket of special composition permits to use steam as heat source, i.e operating tempera-ture range up to 180˚C maximum.

Less Installation SpaceThe lightweight and compact construction saves the installa-tion space to 1/4 and the weight to 1/3 of shell & tube heat exchanger respectively. In addition, lightweight and thin heat-ing plate with less liquidhold facilitates the installation work. The Plate Heat Exchanger can be disassembled for cleaning without piping work, while the shell & tube heat needs a addi-tional space for drawing out the tube bundle.

Two fluids temperaturedifference up to its extremely close...

The construction which permits heat exchanging in perfect

counter-current flow with very high heat transfer efficiency

makes it possible to approach the temperature difference be-

tween hot and cold fluids up to 1˚C and less.

Wide Application RangeCapability range : 0.1m3/h to 5,000m3/h

Operating pressure : 4.0MPaG max.

Operating temperature : 180˚C max.

Surface area : 0.18m2/unit to 2,500m2/unit

Plate materials : Stainless steel, Titanium,

High Nickel alloy, Nickel

Other materials : Conforming to the Japanese and in

ternational standards as applicable.

Gasket materials : NBR, EPDM, IIR, FPM, Silicone,

TCG, etc.

High PerformanceThe overall heat transfer co-efficient (U-value) ranges from

4,000 to 9,000 W/m2·˚C in water application, since the plate

corrugation provides high turbulent flow. This is one of the

reasons why plate heat exchanger performs so high heat

transfer coefficient. In addition, this turbulent flow also acts to

prevent scales from the plate surface.

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07 08

PLATE GASKET

The plates are specially selected from various patterns so as to achieve optimum area and cost effective heat exchanger for eac-hunit. These plates can be classified into three patterns, namely.

1. Herringbone pattern such as LX-, UX-, RX-, WX-, and SX-series

2. Wash board pattern such as EX-series

3. Special wave pattern such as GX-, and YX-series

1. Herringbone patternThe herringbone design in LX-series has corrugations with pitch which is rough and deep. In SX-series, the pitch is fine and shallow, hence LX-series are used in application where low NTU is required, and SX-series are best suited for high NTU applica-tion. UX/RX-series is in between LX-series and SX-series.

Even in the same series, the heat transfer characteristic is different due to plate pattern angle. H plate is suited to high NTU, while L plate to low NTU. When the plates corrugated in H plate and L plate can be mixed together in a unit, intermediate ther-mal characteristics can be achieved.

NTU of 1.5 and less is generally referred to as low NTU, and 3.0 and above is considered as high NTU

SX-seriesUX / RX-seriesLX-series

2. Wash board patternAs this type of plate gas less metal contact, it is normally ap-plied to fluids containing fibers, particles or sludge. We have EX-series.

3. Special patternYX plate is used exclusively for vapor condensation. (See Page 14)

GX plate is developed for heat transfer of fluids containing much slurry or high viscosity liquids. (See Page 14)

H plate L plate Mixed arrangement

1. Versatile gasketHISAKA Plate Heat Exchanger is used in almost all pro-

cess industries, as such the gaskets are specifically selected based on the operating condition. A wide range of gaskets are available such as NBR, EPDM, IIR, FPM, Silicon, etc.

●Special Hisaka (S-1) glue shall be applied for bonding

2. Glue-free gasket slit-in typeThese plate gaskets do not need adhesive.

The slit-in gasket is especially recom-

mended for those applications where fre-

quent replacement of the gasket is required.

Further, without the adhesives, adhesive

odor is reduced. This slit-in type gasket is

suitable for such as water treatment Food

application.

Above is the comparison chart between N-EPDM and conven-tional EPDM describing the difference of its life time. N-EPDM can realize the stability and the sustainability during the long time operation.

4. PTFE Cushion Gasket (TCG)Through our own development, HISAKA has pio-

neered PTFE Cushion Gaskets for the Plate Heat Ex-

changer. It is normally used in applications where con-

ventional synthetic rubber would have limitations due

to the corrosiveness of the fluid being handled. With

this new development, the Plate Heat Exchangers can

be applied in much wider field than before due to the

chemical resistance and the durability of PTFE.

●Special double adhesive tape shall be applied for bonding

Features1. Excellent chemical resistance against most chemical espe-

cially organic solvent.

2. Due to the elastic core of the TCG gasket, it does not

require strong tightening torque during the assembly of the

unit. Thus reducing the risks of plate deformation due to

over tightening.

3. TCG gasket can be used for one side only, if the non-

corrosive fluid is running in the other side where conven-

tional gasket can be used.

3. NEW-EPDM (N-EPDM)Usually, EPDM gasket is selected either for high tem-

perature or corrosive application. Although HISAKA

EPDM gasket is of high quality, the rubber gasket

loses elasticity as the time passed. A newly developed

cutting edge N-EPDM gasket was introduced. The

N-EPDM gasket improves both the heat and chemical

resistance. The life-time is two times higher than con-

ventional EPDM. Originally invented specifically for

CO2 chemical recovery process, the N-EPDM is ideal

for other applications with many advantages.

NTU =Hot temp in-Hot temp out

LMTD

NTU : Number of heat Transfer Unit

LMTD : Logarithmic Mean Temp. Difference

SlitSlit

Sealin

g p

erfo

rmance

SlitSlit

Fix the gasket

GasketGasket

TCG

Synthetic rubber

Synthetic rubber TCG TCGSynthetic rubber

Plate

Liquidcontacting

side

PTFE

Life time of N-EPDM and EPDM (180℃)

Slit-in gasket

NEW-EPDM

2.0

1.0

0EPDM

*subject to actual operation

Liquidcontacting

side

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PLATE HEAT EXCHANGERS VARIATION

RX-146A-TNHJR-24Plate model Frame type No. of plate

No. of platePlate series name (LX, UX, RX, SX, EX, GX, YX)

Plate size (0-13)

Plate pattern (1-6, MIX case 7-9)See P.07

Plate thickness (0.5, 0.6, 0.8, 1.0)6 means 0.6mm

Gasket type (A:Slit in, B/none:Glue)

Only use for specific structure (R:Steam duty, L:Partition plate)

Frame range (J, P)See P.10

Pressure range(none, H, U, S)

Connection type (N, TN/KN, none)

W

H

L

J Typefor small number plates

L

P Typefor large number plates

(with Guide-bar Support)

SX

Se

ries

WX

Se

ries

EX Series

LX-00 LX-01 50 2 5 857 350 415~518 ̶

LX-02

LX-10 LX-11 100 4 15 1,066 460 388~396 1,336

LX-12

LX-20 LX-21 100 4 80 1,593 580 488~686 933~2,151

LX-22

LX-30 LX-31 150 6 100 1,575~1,675 650 ̶ 606~4,021 LX-32

LX-40 LX-41 200 8 300 2,075~2,154 790 ̶ 1,002~4,417 LX-42

LX-50 LX-51 200 8 200 1,995~2,045 810 ̶ 713~3,313 LX-52

UX-005 UX-005 20 3/4 1 331 160 200 ̶

UX-01 UX-01 25 1 10 850 300 300~675 ̶

UX-10 UX-11 50 2 30 1,115 408 385~400 825~1,440 UX-12

UX-20 UX-21 100 4 60 1,540 550 362~385 788~2,011 UX-22

UX-30 UX-31 100 4 200 1,841~1,891 610 ̶ 598~2,821 UX-32

UX-40 UX-41 200 8 200 2,135 760 ̶ 1,002~3,352 UX-42

UX-90 UX-91 350 14 800 2,829~2,929 1,300 ̶ 1,760~5,760 UX-92

UX-100 UX-102

UX-103 500 20 1,600 3,630~3,780 1,570 ̶ 2,262~8,262 UX-104

UX-112 UX-110 UX-113 500 20 ̶ 3,630~3,780 1,570 ̶ 2,262~8,262 UX-114

UX-130 UX-133 500 20 1,600 4,270~4,300 1,570 ̶ 2,262~8,262 UX-134

UX-160 UX-161 600 24 4,300 4,250 1,900 ̶ ~8,900 UX-162

RX-00 RX-01 20 3/4 2 488 242 402 ̶ RX-02

RX-10 RX-13 100 4 30 1,177 460~500 388~405 828~1,345 RX-14

RX-30 RX-31 150 6 200 1,850~1,900 650 ̶ 606~2,836 RX-32

RX-50 RX-51 200 8 500 2,182~2,231 820~950 ̶ 913~3,513 RX-52

RX-70 RX-71 250 10 500 2,434~2,584 900 ̶ 1,760~5,760 RX-72

RX-92

RX-90

RX-93 400 16 1,600 2,990~3,140 1,370 ̶ 1,762~7,012

RX-94

LX

Se

ries

UX

Se

ries

RX

Se

ries

ModelMax Heat

Transfer Aream2

Hmm

Wmm J P

ModelConnection Dia

mm inch

Max HeatTransfer Area

m2

Hmm

Wmm

L mmmm

J P

Connection Dia

mm inch

SX-10 SX-11 50 2 100 1,590 360 ̶ 426~1,526 SX-12

SX-20 SX-21 100 4 200 1,870 540 ̶ 620~2,020 SX-24

SX-30 SX-31 150 6 600 2,683 634 ̶ 713~3,713 SX-32

SX-41 200 8 500 2,166 805 ̶ 758~3,757

SX-40

SX-44

SX-43 SX-45

SX-71 250 10 800 2,692 1,070~1,090 ̶ 1,510~4,510

SX-70

SX-74

SX-73 SX-75

SX-82S SX-80S SX-83S 1,500 2,529 1,300 ̶ 1,760~5,760 SX-84S

SX-82M SX-80M SX-83M 350 14

2,000 2,929 1,300 ̶ 1,760~5,760

SX-84M

SX-82L SX-80L SX-83L 2,600 4,192 1,300 ̶ 1,760~5,760 SX-84L

SX-91M SX-92M

SX-90M SX-93M

1,700 3,134~3,284 1,300~1,390 ̶ 1,762~6,762 SX-94M SX-95M

350

14 SX-96M

SX-91L

SX-90L SX-92L

1,900 3,438~3,588 1,300~1,390 ̶ 1,762~6,762 SX-94L SX-95L

WX-10

WX-11 WX-12

100 4 30 1,177~1,222 500 ̶ 832~1,851 WX-13 WX-14

WX-50 WX-53 200 8 200 2,233 820 ̶ 1,002~3,352 WX-54

WX-90 WX-91

350 14 800 2,829~2,929 1,450 ̶ 1,760~5,760 WX-92

EX-15 EX-15 100 4 60 1,445 550 ̶ 788~2,198

EX-11 EX-11 200 8 100 2,100 760 ̶ 997~3,212

L

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G/E F.W. CoolerLube. Oil CoolerCentral F.W. Cooler

MARINESTEEL MILL HVAC

PETROCHEMICAL PLANT

POWER STATION

CENTRAL COOLING SYSTEM

PULP & PAPER

11 12

APPLICATION

APPLICATIONChemical CausticSoda, Fertilizer, Petrochemical,Oil Refinery, Oil & Fat, Pharmaceutical

Food Sugar, Starch, Sauce, Ketchup, Sodium glutamate

HVAC Air-conditioning, Tap water heating

Steel Mill Blast Furnace, Continuous Casting, C.O.G, Plating & Galvanizing

Metal Plating, Quenching, Anodizing, Painting

Pulp & Paper Black Liquor, White Liquor, Digester, Heat Recovery

Textile Synthetic Fiber, Spinning, Dyeing

Central Cooling System (by Sea water / Fresh water), Power Station, Co-generation, Marine and many others.

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13 14

SEMI WELDED PLATE MULTI GAP PLATE

FEATURES

High heat transfer coefficient owing to uniform distribution of flow to entire heat transfer is by special plate pattern. A couple of plates are laser welded with o-ring at port holes between the plates, thus semi-welded plate heat exchanger can be used for higher pressure compare to conventional Plate Heat Exchanger.

ADVANTAGES

1. High pressure resistance is about 2 to 3 times higher than all gasket type heat exchanger.

2. Save maintenance cost.3. Chemical resistance TCG o-ring and synthetic rubber are se-

lectively used.4. Nozzle pitch dimensions of semi-welded plate heat exchanger

are same to those of following plate heat exchangers. WX-10 and RX-10 WX-50 and RX-50 WX-90 and UX-90

Therefore, RX-10, RX-50, UX-90 can be replaced to WX se-ries without changing location of connection pipes.

5. Different from full welded plate heat exchanger, Semi-welded plate heat exchanger can be easily added plates to in-crease capacity.

6. Semi-welded plates heat exchanger can be disassembled and done easy maintenance against full welded plate heat exchanger.

CONSTRUCTON of SEMI WELDED PLATE

SEMI WELDED TYPE HEAT EXCHANGER

LASER WELDINGGASKET

PROCESS FLUID COOLING WATER

WX-50WX-10 WX-90

COOLING WATERPROCESS FLUID

ALL GASKET TYPE HEAT EXCHANGERGASKET

FEATURES

GX-21 provides 10mm channel space both for hot and cold sides, so that heat recovery can be performed between hot and cold slurry. GX-22 plate is made by reversing and upside down GX-21 plates.Mixed plate arrangement of GX-21 and GX-22 is named GX-23. It gives the widest channel spacing (20mm) at one side, which is available for large size particles.GX plates have wider depth, larger corrugation pitch and less metal contact points, comparing to conventional plates.

ADVANTAGES

1. Easy to flow throughout between plates.2. GX series provides the widest channel spacing.3. Mixed plates arrangement gives three types of channel spac-

ing.4. It is better performance for slurry, sludge and crystal con-

taining liquid.5. Electrolytic polishing selectively used for food application.

CONDENSING PLATE

FEATURES

YX type heat exchanger is specially designed for condenser to provide high condensing performance in characteristic formed various material plates.This characteristic YX shape is enable to be light and com-pact construction and it has the heat transfer performance of 2 to 3 times as high as conventional S&T heat exchanger.

ADVANTAGES

1. Heat Transfer coefficient is about 2 times as high as that of shell & tube heat exchager. The condensing surface is al-

ways secured and the heat transfer coefficient is improved because condensate is immediately drained out.

2. To achieve much less vapor pressure drop than the conven-tional Plate type Heat Exchanger, special consideration of plate characteristic is taken in contribution.

3. Cooling water consumption is about half of S&T heat ex- changer.4. The use of TCG gasket is selectively used and it expands

the application to wide field.5. Easy change of condensing capacity by increase or reduc-

ing the number of plates.6. Because of inlet and out let connections at the same side,

YX type can be applied not only an total condenser but also to partial condenser.

SpecificationsMax. flow rate : 30,000m3/hOperating pressure : -0.097MPaG ~ 0.6MPaGMax. operating temperature : 180˚CPlate material : Stainless steel, Titanium etc.Gasket material : NBR, EPDM, IIR, TCG etc.

SpecificationsMax. flow rate : 900m3/hMax. operating pressure : 0.7MPaGMax. operating temperature : 130˚CConnection (standard) : 100mm (4"), 200mm (8")Plate material : Stainless steel, Titanium etc.Gasket material : NBR, EPDM etc.

GX-20

GX-21 GX-23Combination of GX-21 & GX-22

a view of the cross section from top

SpecificationsMax flow rate : 2300m3/hOperating pressure : 4.0 MPaGMax operating temperature : 180˚CConnection Diameter : 100mm(4")/200mm(8")/350mm(14")Plate material : Stainless steel, Titanium, High Nickel alloy etc.Gasket material : EPDM, TCG, FPM etc.

APPLICATION●BTX Recovering Process in COG Plant●Sulfuric Acid Process●B.P.A Recovering Process in Poly-resin Plant●Quench Water Cooler in Ethylene Plant●Vacuumed Condensate Cooler in Synthetic Fiber Process●Pure Water Heater in Clean Room●Oil and Fat

APPLICATION●Slurry in PVC, Latex ●Glucose●Sludge quenching oil ●Flesh juice●Plating solution ●Waste water●Crystal (sodium hypo-chloride, sodium alminate, etc.)

APPLICATION●Wort Pan Condenser in Beer Prpcess●Vent Gas Condenser●Cl2 N2 NH3 Gas Condenser●Barometric Condenser

Water side Vapor side

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15 16

MAINTENANCE

Decreasing the plate thickness due to severe erosion corrosionCracking at the gasket groove Heat exchanger Seawater inlet port hole Wood chips, seaweeds and shellfish are blocking the flow channel, and causing poor fiow in the unit.

In order to extend the lifetime of the plate heat exchanger, it is important to watch changes in conditions. Frequently observed

faults and causes are summarized below. If those faults are detected, please contact us and inform manufacturing number of the

unit.

Hestia NX-50

Installation ofDual wall PHE

Installation ofconventional PHEs

AFluid

20

109876543210

80 140 200 260

●Detect Leaks

●Inhibits Oxidation Degradation

●Prevents Leakage Dispersal

FEATURES

The traditional single gasket pressure boundary was abandoned and replaced by an innovative two gasket system incorporating inter gasket leakage detection. The result is the “Hestia NX-50” employing the world’s first double-gasketed line design.

ADVANTAGES

1. By double-gasketed line design, gasket line is provided to the outermost periphery to inhibit oxidation degradation in the inner gasket (which serves a sealing role) from outside air.

2. Prevent leakage dispersal. Should a leak occur in the inner gasket, this prevents the fluid from reaching outside.

3. To achieve high heat-resistance, compounding ratio of gasket is improved.

4. The improved gasket groove and plate pattern are increasing seal pressure and ensures high pressure-resistance.

5. Achieving a life time 5 times longer than Hisaka’s conventional Plate Heat Exchangers.

6. High heat-resistance and pressure-resistance allow for environ-ments with high temperature of 250℃ and seal pressure of 9.5Mpa or higher, which conventional PHE couldn’t use.

DUAL WALL PLATE

FEATURES

Dual wall plates consist of two identical plates which are stacked and laser-welded around their port holes. This construction realizes much safer against intermixing between two fluids than conven-tional design. Dual wall Plate Heat Exchangers are suitable for the heat transfer processes that use fluids to be avoided intermixing because of being hazardous in operation and environment.

ADVANTAGES

1. If any one of the two fluids would leak through the first plate, Dual wall design would be prevented from going any further due to the air gap and the second plate.

2. In case any one of plates were to fail, the leak can be detected from outside because of leaking through the gap of the plates.

3. To prevent intermixing of the fluids, “Double seal gasket” system is used. Any leakage of fluids across the gasket can be detected from the outside because of being escaped from units.

APPLICATION●High temperature and high pressure fluids systems like

around boilers or in nuclear power plants.●Dangerous or combustible fluids in chemical plants or the

like.

■Hestia NX-50 High heat-resistance and pressure-resistance

Double-Gasketed Line Design

Leak Detection Holes

Hestia NX-50 Plate

2 sets of heat exchangers in additionto extra pump and piping.

Only one PHE is enoughfor the duty.

Laserweldedparts

Air gap

Twoidenticalplates

B Fluid B Fluid

A FluidA Fluid

*Product developed jointly with Hitachi-GE Nuclear Energy, Ltd.

*Patent pending

Hestia NX-50 (Actual Performance)

Hestia NX-50 (Design Performance)

Conventional Plate

Outer periphery gasket

Dual Wall Plate Double Seal Gaslet

Detection hole

Leak

Inner gasket

Heat resistance temperature (℃)

Se

al p

ressu

re (M

Pa

)

Diagram of heat-resistance and pressure-resistance

Should a leak occur in the inner gasket, this prevents the fluid from reaching outside.

A gasket line is provided to the out-ermost periphery to inhibit oxidation degradation in the inner gasket (which serves a sealing role) from outside air.

Due to the double-gasketed line design, even if a fluid leak occurs in an inner gasket, you can quickly detect the leak using the detection holes provided between the internal and external gaskets.

APPLICATION●Cooling of transformer oil●MGO Cooling in Marine use●Heat transfer of lubricant oil or hydraulic oil duty●Heat transfer of food processing line●Heat transfer of Bio-process line●Heat transfer of two fluids which makes hazardous matter

by intermixing.

Two identical plates are stacked and laser-welded together around the port holes.

BFluid

AFluid

BFluid

It is possible that corro-sion or damage to the intermediate plate has penetrated the plate. Replace the damaged plate.

It is necessary to clean the plates and remove scale, because of supposing scaling on the heat transfer surface.

Clogging of the port holes inlet and/or scale deposition on the heat transfer surfaces may be supposed. It is necessary to clean the unit and remove scale.

The D-plate gasket, rubber boots, D-plate or S-nozzle may be damaged. Replace the damaged part.

The E-nozzle gasket, E-nozzle, rubber boots, or E-plate may be damaged. Replace the damaged part.

Insufficient tightening the plate pack, damage or deterioration of gaskets, plate gasket groove or double seal area corrosion, wrong plate arrangement, foreign object caught between gasket seal surfaces, gasket twisting or overlapping from the groove may be the supposed. Correct each fault or replace gaskets and/or plate.

q Heat transfer performance

r From S-Frame

w Flow performance

e From plate pack

t From E-Frame

Decreasing of performance

Leakage of fluids

y Intermixing of two media

Faults

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