Related Manuals for Alfa Laval AQ1
Summary of Contents for Alfa Laval AQ1
- Page 1 Gasketed plate-and-frame heat exchangers AQ line - AQ1, AQ1A, AQ1L, AQ2, AQ2A, AQ2L, AQ2S, AQ2T, AQ3, AQ4, AQ4T Instruction Manual Lit. Code 200000284-1-EN-GB...
- Page 2 © Alfa Laval Corporate AB 2019-05 This document and its contents are subject to copyrights and other intellectual property rights owned by Alfa Laval Corporate AB. No part of this document may be copied, re-produced or transmitted in any form or by any means, or for any purpose, without Alfa Laval Corporate AB’s prior express written permission. Information and services provided in this document are made as a benefit and service to the user, and no representations or warranties are made about the accuracy or suitability of this information and these services for any purpose.
- Page 3 English Magyar Download local language versions of this instruction Az Ön nyelvére lefordított használati útmutatót manual from www.alfalaval.com/gphe-manuals or use letöltheti a www.alfalaval.com/gphe-manuals the QR code weboldalról, vagy használja a QR-kódot. български Italiano Изтеглете версиите на това ръководство за Scarica la versione in lingua locale del manuale di употреба...
- Page 4 Pусский Руководство пользователя на другом языке вы можете загрузить по ссылке www.alfalaval.com/ gphe-manuals или отсканировав QR-код. Slovenski Prenesite različice uporabniškega priročnika v svojem jeziku s spletne strani www.alfalaval.com/gphe- manuals ali uporabite kodo QR. Slovenský Miestne jazykové verzie tohto návodu na používanie si stiahnite z www.alfalaval.com/gphe-manuals alebo použite QR kód.
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Page 5: Table Of Contents
Contents 1 Preface ..........................7 Conditions and Requirements................... 7 Environmental compliance..................8 2 Safety ..........................9 Safety considerations....................9 Definitions of expressions..................9 3 Description ........................11 Components......................11 Name plate......................14 Function........................16 Multi-pass........................ 17 Identification of plate side..................17 4 Installation ........................ - Page 6 7 Storage of the heat exchanger ..............45 Storage in packing box....................45 Taken out of service....................46...
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Page 7: Preface
Maintenance and installation of the heat exchanger shall be done by persons who have knowledge and authorization according to local regulations. This may include actions such as piping, welding and other kind of maintenance. For maintenance actions not described in this manual, contact your Alfa Laval representative for advice. PHE drawings PHE (plate heat exchanger) drawings mentioned in the manual are the drawings included in the delivery of the heat exchanger. -
Page 8: Environmental Compliance
1.2 Environmental compliance Alfa Laval endeavours to perform its own operations as cleanly and efficiently as possible, and to take environmental aspects into consideration when developing, designing, manufacturing, servicing and marketing its products. -
Page 9: Safety
Laval’s instructions in this manual. Incorrect handling of the heat exchanger may result in serious consequences with injuries to persons and/or property damage. Alfa Laval will not accept responsibility for any damage or injury resulting from not following the instructions in this manual. - Page 10 2 Safety 200000284-1-EN-GB...
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Page 11: Description
3 Description 3.1 Components Main components 1. Frame plate Fixed plate with a various number of portholes for the connection of the piping system. The carrying and guiding bar are attached to the frame plate. 2. Carrying bar Carries the plate pack and the pressure plate. 3. - Page 12 Threaded stud bolts around the portholes secure the flange connections to the apparatus. • Squared loose flange The squared loose flange is a special flange supplied by Alfa Laval to be used with the customers piping and is attached with four stud bolts. Optional components •...
- Page 13 Description 3 • Earthing lug An earthing connection is used to eliminate the risk of static electricity building up in the equipment. • Nozzle cover Protection to avoid particles to enter into the heat exchanger during transportation. • Drip tray Depending on the type of fluid in the heat exchanger and the type of installation, a drip tray (drainage box) may be necessary to avoid injury to personnel and damage to equipment.
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Page 14: Name Plate
3 Description 3.2 Name plate The type of unit, manufacturing number and manufacturing year can be found on the name plate. Pressure vessel details in accordance with the applicable pressure vessel code are also given. The name plate is fixed to the frame plate, most commonly, or the pressure plate. - Page 15 Description 3 Manufacturer Type Serial No. MANUFACTURER: Year YEAR OF MANUFACTURING: Fluid group TYPE: SERIAL NUMBER: Inlet Outlet Volume → → Allowable press. INLET → OUTLET Min./Max. FLUID GROUP VOLUME Allowable temp. MAX. OP. TEMP. Min./Max. TS ALLOWABLE PRESS. Manufacturer MIN./MAX.
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Page 16: Function
3 Description 3.3 Function The heat exchanger consists of a pack of corrugated metal plates with portholes for the input and output of the two separate fluids. The heat transfer between the two fluids takes place through the plates. The plate pack is assembled between a frame plate and a pressure plate and compressed by tightening bolts. -
Page 17: Multi-Pass
Description 3 3.4 Multi-pass Multi-pass sections can be created by using turning plates with 1, 2 or 3 unholed ports. The main purpose is to change the flow direction of one or both fluids. An example of where multi-pass can be used is in processes that require longer heating periods if the media requires slower heating. - Page 18 3 Description 200000284-1-EN-GB...
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Page 19: Installation
4 Installation 4.1 Before installation CAUTION During installation or maintenance, precautions must be taken to avoid damaging the heat exchanger and its components. Damage to components can adversely affect the performance or serviceability of the heat exchanger. To consider before installation •... -
Page 20: Requirements
4 Installation 4.2 Requirements Space Please refer to the delivered PHE drawing for actual measurements. 1. Free space is required for lifting plates in and out. 2. Free space is required under the lower tightening/locking bolt for maintenance. 3. Supports for the guiding bar may be needed. 4. - Page 21 Installation 4 CAUTION Turning of the connections will damage the gaskets on the end plate and cause leakage. NOTE Using headed bolts require careful measuring to ensure that the bolts get the correct engaged threaded length into the frame plate and the minimum engagement length (min) are stated in the PHE drawing.
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Page 22: Lifting
WARNING Never lift by the connections or the stud bolts around them. Figure 4: Lifting AQ1, AQ2, AQ4, AQ1A, AQ2A, AQ2S, AQ1L and old version of AQ3, AQ2L Figure 5: Lifting AQ1, AQ2, AQ4, AQ1A, AQ2A, AQ1L and old version of AQ3,... - Page 23 Installation 4 Figure 6: Lifting AQ2S. Figure 7: Lifting AQ4T, AQ2T, AQ3, AQ2L 200000284-1-EN-GB...
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Page 24: Raising
4 Installation 4.4 Raising This instruction is valid when raising the heat exchanger after delivery from Alfa Laval. Only use a strap approved for the weight of the heat exchanger. Follow the principle of the instruction below. CAUTION The straps shall be long enough to be able to rotate the heat exchanger without obstruction. - Page 25 Installation 4 Lift the heat exchanger off the timber beams. Lower the heat exchanger into a horizontal position and place it on the floor. 200000284-1-EN-GB...
- Page 26 4 Installation 200000284-1-EN-GB...
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Page 27: Operation
5 Operation 5.1 Start-up During the start-up, check that there are no visible leakages from the plate pack, valves or piping system. CAUTION Before pressurizing the heat exchanger, it is important to ensure that the temperature of the heat exchanger is within the temperature range as stated in the PHE drawing. CAUTION If the temperature of the heat exchanger is below the minimum temperature for the gaskets prior to the service, it is recommended to heat the heat exchanger above this limit to avoid cold... - Page 28 5 Operation Check that the valve is closed between the pump and the unit controlling the system flow rate to avoid pressure surge. If there is a vent valve installed at the exit, make sure it is fully open. Increase the flow rate slowly. Open the air vent and start the pump.
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Page 29: Unit In Operation
Operation 5 5.2 Unit in operation Adjustments of flow rates should be made slowly in order to protect the system against sudden and extreme variations of temperature and pressure. During operation, check that media temperatures and pressures are within the limits stated on the name plate and the PHE drawing. - Page 30 5 Operation 200000284-1-EN-GB...
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Page 31: Maintenance
Different methods can be used for cleaning (refer to Cleaning – Non-product side on page 31) or reconditioning can be performed at an Alfa Laval service center. After a long period of use, it can be required to regasket the heat exchanger. - Page 32 6 Maintenance WARNING The residuals after a cleaning procedure shall be handled according to local environmental regulations. After neutralization most cleaning solutions may be drained into the waste water system under the condition that the fouling deposits do not contain heavy metals or other toxic or environmentally dangerous compounds.
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Page 33: Opening
During manual cleaning, it is necessary to open the heat exchanger to clean the plates. NOTE Before opening the heat exchanger, check the warranty conditions. If in any doubt, contact the Alfa Laval sales representative. Refer to Warranty conditions on page 7. -
Page 34: Opening Procedure
6 Maintenance 6.2.2 Opening procedure Shut down the heat exchanger. Close the valves and isolate the heat exchanger from the rest of the system. Drain the heat exchanger. NOTE Avoid vacuum in the heat exchanger by opening vent valves. Remove the protection sheets, if any. Dismantle pipes from the pressure plate so that the pressure plate are free to move along the carrying bar. - Page 35 Maintenance 6 Mark the plate assembly on the outside by a diagonal line. Measure and note the dimension. Loosen and remove the locking bolts. Identify them according to Bolt configuration on page NOTE Brush the threads of the tightening bolts with a steel wire brush and then grease the threads before loosening the tightening bolts.
- Page 36 CAUTION When opening the plate pack of the models AQ1, AQ1A and AQ1L, be careful when moving the pressure plate. Make sure the pressure plate is positioned safely from the end of the carrying bar.
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Page 37: Manual Cleaning Of Opened Units
Maintenance 6 6.3 Manual cleaning of opened units CAUTION Never use hydrochloric acid with stainless steel plates. Water of more than 330 ppm Cl may not be used in the preparation of cleaning solutions. It is very important that aluminium carrying bars and support columns are protected against chemicals. -
Page 38: Deposits Not Removable With Water And Brush
Check that all the sealing surfaces are clean. Brush 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 or its equivalent. - Page 39 Maintenance 6 If the plates have been removed, insert them 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 made when the heat exchanger was opened, refer to step on page 35 in Opening...
- Page 40 6 Maintenance Tighten the four bolts (1), (2), (3), (4) evenly until dimension A has been reached. When a pneumatic tightening device is used, see table below for maximum torque. Measure dimension A during tightening. Bolt with washer Bolt size 13.5 26.5 For manual tightening, the tightening torque...
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Page 41: Pressure Test After Maintenance
Example of a rebuilding is that more number of plates are added to the plate pack. If there is any uncertainty about the testing procedure of the heat exchanger, consult an Alfa Laval representative. 200000284-1-EN-GB... -
Page 42: Regasketing
33, and remove the plate that is to have a new gasket. NOTE Before opening the heat exchanger, check the warranty conditions. If in any doubt, contact the Alfa Laval sales representative. Refer to Warranty conditions on page 7. -
Page 43: Glued Gaskets
Maintenance 6 6.6.2 Glued gaskets Use glue recommended by Alfa Laval. Separate gluing instructions will be delivered together with the glue. CAUTION Other glues than those recommended can contain chlorides that can damage the plates. CAUTION Do not use sharp tools when removing the glued gasket to avoid damage to the plates. - Page 44 6 Maintenance 200000284-1-EN-GB...
- Page 45 7 Storage of the heat exchanger Alfa Laval delivers the heat exchanger ready to be put into service upon arrival, if nothing else has been agreed. Nevertheless, keep the heat exchanger in the packing box until installation. If storing for longer periods of time, such as one month or longer, certain precautions should be made to avoid unnecessary damage to the heat exchanger.
- Page 46 Closing on page 38. 7. Alfa Laval recommends a hydraulic test should be carried out. The media, usually water, should be entered at intervals to avoid sudden shocks to the heat exchanger. It is recommended to test up to the Design Pressure.
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