Alfalaval M15 User manual

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Instruction Manual
Plate Heat Exchangers
M15 TL10 TL15 T20 TS20
MX25M30 MA30
Part number 34500621-01
1002

Table of Contents English
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Table of Contents
Description.......................................................................................... 5
Main components ...................................................................................5
Function .................................................................................................6
Identification of plate side ......................................................................6
Semi-welded PHE ..................................................................................6
Installation........................................................................................... 7
Before installation ..................................................................................7
Requirements .........................................................................................7
Lifting .....................................................................................................8
Raising ...................................................................................................9
Operation........................................................................................... 10
Start-up ................................................................................................10
Unit in operation ...................................................................................11
Shut-down ............................................................................................11
Maintenance...................................................................................... 12
Cleaning-In-Place (CIP) .......................................................................12
Manual cleaning ...................................................................................13
Closing .................................................................................................16
Closing - TL15-B ..................................................................................18
Pressure test after maintenance ..........................................................19
Regasketing .........................................................................................19
How to contact Alfa Laval
Contact details for all countries are continually updated on our website.
Please visit www.alfalaval.com and contact your local Alfa Laval Representative.

English Preface
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Preface
This manual provides information needed to install,
operate and carry out the maintenance of the Plate
Heat Exchanger (PHE).
Safety considerations
The Plate Heat Exchanger shall be used and main-
tained in accordance with Alfa Laval’s instructions in
this manual. Faulty handling of the Plate Heat Ex-
changer may result in serious consequences with in-
juries to persons and/or property damage. Alfa Laval
will not accept responsibility for any damage or injury
thathasresultedfrom notfollowingtheinstructions in
this manual.
The Plate Heat Exchanger shall be used in accord-
ance with the specified configuration of material, me-
dia types, temperatures and pressure for the specific
Plate Heat Exchanger.
The following models are covered in this manual:
•M15
• TL10
• TL15
• T20
•TS20
•MX25
•M30
•MA30
• TL35
Definitions of expressions
PHE drawings
The PHE drawings mentioned in the manual are the
drawings included in the delivery of the Plate Heat
Exchanger.
Warranty conditions
The warranty conditions are usually included in the
signed sales contract prior to the order of the deliv-
ered PHE. Alternatively, the warranty conditions are
included in the sales offer documentation or with a
reference to the document specifying the valid condi-
tions. If faults occur during the specified warranty pe-
riod, always consult your local Alfa Laval
Representative for advice.
Report the date when the Plate Heat Exchanger was
put into operation to the local Alfa Laval Representa-
tive.
Advice
Always consult your local Alfa Laval Representative
for advice on:
• New plate pack dimensions if you intend to
change the number of plates
• Selection of gasket material if operating tempera-
tures and pressures are permanently changed, or
if another medium is to be processed in the PHE.
Warning!
Type of hazard
WARNING indicates a potentially hazardous situation
that, if not avoided, could result in death or serious
injury.
Caution!
Type of hazard
CAUTION indicates a potentially hazardous situation
that, if not avoided, may result in minor or moderate
injury.
Note!
NOTE indicates a potentially hazardous situation that, if
not avoided, may result in property damage.

Preface English
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Storage of the PHE
Alfa Laval delivers the PHE ready to be put into serv-
ice upon arrival if nothing else has been agreed.
However, keep the PHE in the packing box until in-
stallation.
Regarding storage for longer periods of time, one
month or more, certain precautions should be made
to avoid unnecessary damage to the PHE.
If there is any uncertainty about the storage of the
PHE, consult an Alfa Laval Representative.
Storage in packing box
If the nature of storage after the delivery of the PHE
isknowninadvance,informAlfaLavalwhenordering
the PHE to ensure thatit will be properly prepared for
storage before packing.
Indoor storage
• Store inside a room with the temperature
between 15 and 20°C (60 - 70°F) and humidity
around 70%. For outdoor storage read “Outdoor
storage” on this page.
• To prevent damage to the gaskets, there should
not be any ozone-producing equipment in the
room such as electric motors or welding equip-
ment.
• To prevent damage to the gaskets, do not store
organic solvents or acids in the room and avoid
direct sunlight, intensive heat radiation or ultravi-
olet radiation.
• The tightening bolts should be well covered with
light grease coating.
Outdoor storage
If the PHE has to be stored outdoors, all the precau-
tions mentioned in the section “Indoor storage” on
this page should be taken. Also, protection against
climate is very important.
The stored PHE shall be visually checked every third
month. The check includes:
• Greasing of the tightening bolts
• Metal port covers
• Protection of the plate pack and gaskets
Taken out of service
If, for any reason, the PHE is shut down and taken
out of service for a long period of time, follow the
same advice as in the previous section “Indoor stor-
age” on this page. Although before storage following
actions has to be done.
• Check the measurement of the plate pack (meas-
ure between frame and pressure plate, A dimen-
sion).
• Drain both media sides of the PHE.
• Depending on the media, the PHE should be
rinsed and then dried.
• The connection should be covered if the piping
system is not connected. Use a plastic or ply-
wood cover for the connection.
• Cover the plate pack with non-transparent plastic
film.
Installation after long-term storage
IncaseswhenthePHEhasbeentakenoutof service
for an extensive period of time, i.e. longer than one
year, the risk of leakage when starting up increases.
To avoid this problem it is recommended to let the
gasket rubber rest and regain most of its elasticity.
1. If the PHE is not in position, follow the instruc-
tions “Installation” on page 7.
2. Note the measurement between frame and pres-
sure plate (A dimension).
3. Remove feet attached to the pressure plate.
4. Loosen the tightening bolts. Follow the instruc-
tions “Opening” on page 13. Open the PHE until
the measure is 1.25A.
5. Leave the PHE between 24-48 hours, the longer
the better, for gaskets to relax.
6. Re-tighten according to the instructions “Closing”
on page 16 or “Closing - TL15-B” on page 18.
7. Alfa Laval recommends a hydraulic test to be car-
ried out. The media, usually water, should be
entered at intervals to avoid sudden shocks to the
PHE. It is recommended to test up to the Design
Pressure, refer to PHE drawing.
Note!
Alfa Laval and its representatives reserve the right to
inspect the storage space and/or equipment whenever
necessary until the date of expiry of the warranty period
stipulated in the contract. Notification has to be given
10 days prior to the date of inspection.

English Preface
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Environmental compliance
Alfa Laval endeavours to perform its own operations
as cleanly and efficiently as possible, and to take en-
vironmental aspects into consideration when devel-
oping, designing, manufacturing, servicing and
marketing its products.
Unpacking
Packing material consists of wood, plastics, card-
board boxes and, in some cases, metal straps.
• Wood and cardboard boxes can be reused, recy-
cled or used for energy recovery.
• Plastics should be recycled or burnt at a licensed
waste incineration plant.
• Metal straps should be sent for material recycling.
Maintenance
• During maintenance, oil and wear parts in the
machine are replaced.
• All metal parts should be sent for material recy-
cling.
• Worn out or defective electronic parts should be
sent to a licensed handler for material recycling.
• Oil and all non-metal wear parts must be taken
care of in agreement with local regulations.
Scrapping
At end of use, the equipment shall be recycled ac-
cording to relevant, local regulations. Besides the
equipment itself, any hazardous residues from the
process liquid must be considered and dealt with in a
propermanner.When in doubt,orinabsenceoflocal
regulations, please contact the local Alfa Laval sales
company.

Description English
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Description
Main components
Frame plate
Tightening bolts
Port hole
with stud bolt
connections
Pressure plate
Bolt protection Supporting column
Guiding bar
Plate pack
Protective sheets
Carrying bar
Bolt protection Plastic tubes that protect the threads of the tightening bolts.
Carrying bar Carries the plate pack and the pressure plate.
Frame plate Fixed steel plate with a number of port holes for the connection of the piping system. The carrying and
guiding bars are supported by the frame plate.
Guiding bar Keeps the channel plates and the pressure plate in line at their lower end.
Plate pack
Heat is transferred from one medium to the other through the plates. The plate pack consists of chan-
nel plates, end plates, gaskets and, in some cases, transition plates.
The measure of the plate pack is the A dimension, i.e the measurement between frame and pressure
plate. Refer to PHE drawing.
Port holes with stud
bolt connections
Port holes through the frame plate allow the media to enter into or exit from the Plate Heat Exchanger.
Different types of connections can be used to connect the piping system to the apparatus.
Threaded stud bolts around the port holes secure the connections to the apparatus. The port holes
may be protected against corrosion by metal or rubber linings.
The PHE can be equipped with different connection types. For details refer to PHE drawings.
Pressure plate Moveable steel plate that can contain a number of port holes for the connection of the piping system.
Protective sheets Cover the plate pack.
Mandatory in the USA. Optional in other countries.
Supporting column Supports carrying and guiding bars.
Tightening bolts Compress the plate pack between the frame and pressure plate.

English Description
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Function
The Plate Heat Exchanger (PHE) consists of a pack
of corrugated metal plates with port holes for input
and output for the two separate fluids. The heat
transfer between the two fluids will take place
through the plates.
The plate pack is assembled between a frame plate
and a pressure plate and compressed by tightening
bolts. The plates are fitted with a gasket that seals
the channel and directs the fluids intoalternate chan-
nels.Theplate corrugationpromotes fluidturbulence
and supports the plates against differential pressure.
Principle of plate pack arrangement
Identification of plate side
The A side of the plate is identified by the stamp with
theletter A orthe model name, insome cases both,
at the top of the plate (see figure on the right-hand
side).
Semi-welded PHE
For certain plate sizes there are semi-welded plates
(cassettes) available. The function of the semi-weld-
ed PHE is the same as that of the conventional PHE.
The chapters Installation and Operation in this man-
ual are fully applicable here.
The chapter Maintenance is fully applicable when it
comes to the parts Cleaning-In-Place and Pressure
testaftermaintenanceand partiallyapplicable forthe
remaining part.
Identification stamp

Installation English
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Installation
Before installation
To consider before installation
• Before connecting any piping, make sure all for-
eign objects have been flushed out of the piping
system that should be connected to the PHE.
• Before start-up, check that all tightening bolts are
firmly tightened and that the correct measure-
ments of the plate pack are used. Refer to PHE
drawing.
• When connecting the piping system make sure
the pipes do not subject the PHE to stress or
strain.
• To avoid water hammer, do not use fast-closing
valves.
• Safety valves should be installed according to
current pressure vessel regulations.
• If the PHE surface temperature is expected to be
hot or cold, the PHE should be insulated.
• It is recommended that protective sheets are
used to cover the plate pack.
• For each model, design pressures and tempera-
tures are marked on the identification plate.
These must not be exceeded.
Requirements
Space
A minimum free space is needed for lifting plates in
and out. Refer to the delivered drawing.
Foundation
Install on a flat foundation giving enough support to
the frame.
Elbow
To make it easier to disconnect the PHE, an elbow
should be flanged to the connection in the pressure
plate, directed upwards or sideways, and with anoth-
er flange located just outside the contour of the Plate
Heat Exchanger.
Shut-off valve
To be able to open the PHE, shut-off valves should
be provided in all connections.
Drip tray (optional)
Depending on the type of fluid in the PHE and the
type of installation, a drip tray (drainage box) may be
necessary to avoid injury to personnel and damage
to equipment.
Connections in the pressure plate
It is important that the plate pack has been tightened
to the correct dimension A (check against PHE draw-
ing) before the piping system is connected.
Note!
Put the drip tray in place before positioning the PHE.
Elbow
Shut-off valve

English Installation
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Lifting
Straps should be used when lifting the PHE. Place
straps according to picture.
The straps shall be attached according to the figures
and with a minimum angle of 45°. Refer to the figure
below.
Lifting device for M15, TL10, TL15, T20, TS20.
Lifting device for MX25, M30 and MA30.
Lifting device for TL35.
For detailed information, contact an Alfa Laval Sales
Representative for the document “Cargo Securing
Instructions” (3490003791, 3490003792 and
3490003793).
Warning!
Never lift by the connections or the studs around them.

Installation English
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Raising
This instruction is valid when raising the PHE after
delivery from Alfa Laval. Only use a strap approved
for the weight of the PHE.
1Place two timber beams on the floor.
2Lift the PHE off the pallet using e.g. straps.
3Place the PHE on the timber beams.
4Place straps around one bolt on each side.
5Lift the PHE off the timber beams.
6Lower the PHE into a horizontal position
and place it on the floor.
Caution!
The straps shall be long enough to be able to rotate the
PHE without obstructions. Especially consider the
space for the support column.

English Operation
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Operation
Start-up
During start-up, check that no visible leakages ap-
pear from the plate pack, valves or piping system.
1Before start-up check that all tightening
bolts are firmly tightened and that the
dimension A is correct. Refer to PHE draw-
ing.
2Check that the valve is closed between the
pump and the unit controlling the system
flow rate.
3If there is a valve at the exit, make sure it is
fully open.
4Open the air vent and start the pump.
5Open the valve slowly.
6When all air is expelled, close the air vent.
7Repeat steps 1– 6 for the second media.
Note!
If several pumps are included in the system, make sure
you know which one should be activated first.
Note!
Adjustments of flow rates should be made slowly in
order to avoid the risk of pressure surge (water ham-
mer).
Water hammer is a short-lasting pressure peak that can
appear during start-up, or shut-down of a system, caus-
ing liquids to travel along a pipe as a wave at the speed
of sound. This can cause considerable damage to the
equipment.
Closed
Open
Note!
Avoid rapid temperature changes in the PHE. With
media temperatures over 100°C, slowly increase the
temperature preferably at least for one hour.
Open
Open slowly
Closed

Operation English
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Unit in operation
Adjustments of flow rates should be made slowly in
order to protect the system against sudden and ex-
treme variations of temperature and pressure.
During operation, check that media temperatures
and pressures are within the limits stated on the
PHE-drawing and identification plate.
Shut-down
1Slowly close the valve controlling the flow
rate of the pump you are about to stop.
2When the valve is closed, stop the pump.
3Repeat steps 1–2 for the other side for the
second media.
4If the PHE is shut down for several days or
longer, it should be drained. Draining
should also be done if the process is shut
down and the ambient temperature is
below the freezing temperature of the
media. Depending on the media processed,
it is also recommended to rinse and dry the
PHE plates and connections.
Note!
If several pumps are included in the system, make sure
you know which one should be stopped first.
Closed

English Maintenance
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Maintenance
To keep the Plate Heat Exchanger in good condition
regular maintenance is required.
The plates need to be cleaned on a regular basis.
The frequency depends on several factors such as
type of media and temperatures. Three methods can
be used to perform cleaning. Refer to “Cleaning-In-
Place (CIP)” on page 12, “Manual cleaning” on
page 13 or a reconditioning at an Alfa Laval service
center.
After a longer period of use, it may be required to re-
gasket the PHE by exchanging the gaskets. Refer to
“Regasketing” on page 19.
Other maintenance that should be performed regu-
larly:
• Keep carrying bar and guiding bar cleaned and
greased
• Keep the tightening bolts cleaned and greased.
Cleaning-In-Place (CIP)
The Cleaning-In-Place (CIP) equipment permits
cleaningofthe PHE without opening it. The results of
cleaning with CIP are as follows:
• Cleaning of fouling and descaling of lime deposits
• Passivation of cleaned surfaces to reduce sus-
ceptibility to corrosion
• Neutralization of cleaning liquids before draining.
Follow the instructions of the CIP equipment.
AlfaLavalguaranteesthatplates,gasketsorglueare
not damaged if the procedures given and cleaning
agents prescribed are followed.
If CIP cannot be done, cleaning must be done man-
ually. Refer to section“Manual cleaning” on page 13.
CIP equipment
Cleaning liquids
Warning!
Use proper protective equipment, such as safety boots,
safety gloves and eye protection, when using the clean-
ing agents.
Warning!
Corrosive cleaning liquids can cause
serious injuries to skin and eyes!
Model Maximum number of plates
CIP 200 CIP 400 CIP 800 CIP 1800
M15-B/BD/E/M 316 600 600 600
TL10-B/P 333 522 522 522
TL15-B 165 257 665 665
T20-B/M/P 160 348 700 700
TS20-M 176 382 841 1971
MX25-B/M 83 180 395 925
M30 48 103 227 532
MA30-M/S/SM 49 107 234 549
TL35-B 55 120 263 617
Liquids Description
AlfaCaus A strong alkaline liquid, for removing paint,
fat, oil and biological deposits.
AlfaPhos An acid cleaning liquid for removing metallic
oxides, rust, lime and other inorganic scale.
Contains repassivation inhibitor.
AlfaNeutra A strong alkaline liquid for the neutralization
of AlfaPhos before drainage.
Alfa P-Neutra For the neutralization of Alfa P-Scale.
Alfa P-Scale An acidic powder cleaner for the removal of
of primary carbonate scale but also other
inorganic scale.
AlfaDescalent A non-hazardous acidic cleaning agent for
the removal of inorganic scale.
AlfaDegreaser A non-hazardous cleaning agent for the
removal of oil, grease or wax deposits. Addi-
tionally prevents foaming when using Alpa-
con Descaler.

Maintenance English
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Manual cleaning
To perform manual cleaning it is required to open the
PHE and lift out the plates to clean them.
Opening
1Drain the Plate Heat Exchanger.
2Inspect the sliding surfaces of the carrying
bar and clean and grease it.
3Mark the plate assembly on the outside
with a diagonal line.
4Measure and note the dimension A.
Note!
Before opening the PHE check the warranty conditions.
If in any doubt, contact an Alfa Laval sales representa-
tive. Refer to “Warranty conditions” on page 2.
Warning!
If the Plate Heat Exchanger is hot, wait
until it has cooled down to about 40°C
(104°F).
Warning!
If necessary, use proper protective equipment, such as
safety boots, safety gloves and eye protection, depend-
ing on type of media in the PHE.
Note!
Brush the threads of the tightening bolts with a steel
wire brush and then grease before loosening them.
Mark

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5Keep the four bolts in position, according to
the figure below. Loosen the other bolts and
remove them.
6The remaining four bolts are opened alter-
nately and diagonally in two steps, see fig-
ures below.
Be careful to ensure that the frame plate
and pressure plate are always in parallel.
Skewing of the pressure plate during open-
ing must not exceed 10 mm (2 turns per
bolt) across the width and 25 mm (5 turns
per bolt) vertically.
Step1:Loosenthefourboltsalternatelyand
diagonallyuntiltheplatepackagemeasures
1.05A.
Step 2: Loosen the two diagonal pairs of
bolts alternately, as shown in the figure be-
low.
7Open the plate pack by letting the pressure
plate glide on the carrying bar.
Plates do not need to be removed if clean-
ing is done using only water, i.e. without
cleaning agent.
Step Bolt No. To dimension
1 1–2–3–4 1.05A
2 1–2 or 3–4 Opening
Keep the two bolts
closest below the
upper port holes
Keep the two bolts
closest above the
lower port holes
Caution!
To avoid hand injuries from sharp
edges, protective gloves should always
be worn when handling plates and pro-
tective sheets.
Note!
Plates should be numbered, do this before removing
the plates.
Warning!
The plate pack may still contain a small residual
amount of liquid after draining. Depending on the type
of product and type of installation, special arrange-
ments, e.g. drainage box, may be necessary to avoid
injury to personnel and damage to equipment.
Remove the plates

Maintenance English
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Manual cleaning of opened units
Deposits removable with water and brush
Plates do not need to be removed from the PHE dur-
ing cleaning.
1Start cleaning when the heating surface is
still wet and the plates are hanging in the
frame.
2Remove deposits using a soft brush and
running water.
3Rinse with water using a high pressure
hose.
Deposits not removable with water and brush
Plates must be removed from the PHE during clean-
ing. For a choice of cleaning agents, refer to “Clean-
ing liquids” on page 12.
1Brush with cleaning agent.
2Rinse immediately with water.
Caution!
Never use hydrochloric acid with stainless steel plates.
Water of more than 330 ppm Cl may not be used for the
preparation of cleaning solutions. It is very important
that carrying bars and support columns in aluminium
are protected against chemicals.
Note!
Be careful not to damage the gasket during manual
cleaning.
Warning!
If necessary, use proper protective equipment. Con-
sider risks like loose particles and what kind of media
has been used in the PHE.
Warning!
Use proper protective equipment, such as safety boots,
safety gloves and eye protection, when using the clean-
ing agents.
Warning!
Corrosive cleaning liquids can cause
serious injuries to skin and eyes!
Note!
Long exposure to the cleaning agents can damage the
gasket glue.

English Maintenance
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Closing
Follow the instructions below to ensurethat the Plate
Heat Exchanger will be properly closed. For TL15-B,
follow the separate instructions, Refer to “Closing -
TL15-B” on page 18.
1Check that all the sealing surfaces are
clean.
2Brush the threads of the bolts clean, using
a steel wire brush or the Alfa Laval thread
cleaner. Lubricate the threads with a thin
layer of grease, e.g. Gleitmo 800 Lubriplate
or equivalent.
3Attach gaskets to the plates or check that
all the gaskets are properly attached.
4Insert the plates in alternate directions and
with the gaskets turned towards the frame
plate or pressure plate as specified on the
plate hanging list. Use the marked line that
was done when the PHE was opened.
Refer to step 3 in “Opening” on page 13.
5If the plates are correctly assembled, the
edges form a “honeycomb” pattern, see pic-
ture below.
6Press the plate assembly together. Tighten-
ing is done in two steps, see figures below.
Be careful to ensure that the frame plate
and the pressure plate are always in paral-
lel.
Step 1: Tighten the two diagonal pairs of
bolts alternately until the plate package
measures 1.10A.
Be careful to ensure that the frame plate
and pressure plate are always in parallel.
Skewing of the pressure plate during open-
ing must not exceed 10 mm (2 turns per
bolt) across the width and 25 mm (5 turns
per bolt) vertically.
Note!
If the gasket is wrongly positioned, it will show by the
fact that it rises out of the gasket groove or that it is
positioned outside the groove.
Step Bolt No. To dimension
1 1–2 or 3–4 1.10A
2 1–2–3–4 A

Maintenance English
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Step 2: After that, bolts are tightened alter-
natelyanddiagonally,asshowninthefigure
below. Check the dimension A during tight-
ening at the positions of the bolts that are
being used.
Max tightening torque
When a pneumatic tightening device is used, see ta-
ble below for maximum torque. Measure dimension
A during tightening.
For manual tightening, the tightening torque has to
be estimated.
If dimension A cannot be reached
• Check the number of plates and the dimension A.
• Check that all the nuts and bearing boxes are
running freely. If not, clean and lubricate, or
replace.
7Place the other bolts in position.
• Inspect the washers.
• When fully tightened, the bolts should all
be equally tensioned.
Note!
The final tightening to reach dimension A is recom-
mended to be divided into steps.
Bolt
size Bolt with bearing box Bolt with washers
N·m kpm N·m kpm
M24 450 45
M30 900 90
M39 1300 130 2000 200
M48 2100 210 3300 330

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Closing - TL15-B
Follow the instructions below to ensurethat the Plate
Heat Exchanger will be properly closed.
Closing instructions
1Check that all the sealing surfaces are
clean.
2Brush the threads of the bolts clean, using
a steel wire brush or the Alfa Laval thread
cleaner. Lubricate the threads with a thin
layer of grease, e.g. Gleitmo 800 Lubriplate
or equivalent.
3Attach gaskets to the plates or check that
all the gaskets are properly attached.
4Insert the plates in alternate directions and
with the gaskets turned towards the frame
plate or pressure plate as specified on the
plate hanging list. Use the marked line that
was done when the PHE was opened.
Refer to step 3 in “Opening” on page 13.
5Press the plate package together and put
the tightening bolts in their positions.
6Tighten the bolts alternately in numeric
order, 1 to 6 (8). Repeat this procedure until
the dimension A is reached.
Note!
If the gasket is wrongly positioned, it will show by the
fact that it rises out of the gasket groove or that it is
positioned outside the groove.
Note!
Make sure that the frame plate and the pressure plate
are always positioned in parallel (within maximum
10 mm).
1
5
4
3
6
2
1
2
5
7
46
8
3

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Pressure test after maintenance
Before start-up of production, whenever plates or
gaskets have been removed, inserted or exchanged,
it is strongly recommended to perform a pressure
test to confirm the internal and external sealing func-
tion of the PHE. During this test, one media side at a
time must be tested with the other side open to the
ambient pressure.
The recommended test time is 10 minutes for each
media.
Please note that PHE units for refrigeration applica-
tions and units with media not mixable with water
must be dried after hydrostatic pressure testing.
Please consult the local office/representative of the
supplier for advice on the pressure testing proce-
dure.
Regasketing
The procedures below relate to Field gaskets, Ring
gaskets and End gaskets.
Clip-on
1Open the PHE, [refer to “Opening” on
page 13] and remove the plate that is to
have a new gasket.
2Remove the old gasket.
3Ensure that all sealing surfaces are dry,
clean and free of foreign matter such as fat,
grease or similar.
4Check the gasket and remove rubber resid-
ual before attaching it.
5Attach the clip-on gasket to the plate. Slip
the gasket prongs under the edge of the
plate.
6Repeat the procedure until all plates that
are needed to be regasketed are done.
Close the PHE according to “Closing” on
page 16.
Caution!
The pressure testing shall be performed at a pressure
equal to the operating pressure of the actual unit, but
never above the design pressure as stated on the
nameplate.
Note!
Before removing the old gaskets check how they are
attached.
Note!
Before opening the PHE check the warranty conditions.
If in any doubt, contact an Alfa Laval sales representa-
tive. Refer to “Warranty conditions” on page 2.
Note!
Especially the end plate gasket!
Note!
Make sure the two gasket prongs are in the correct
position.