Alfa Laval PHE, Manual

Page 1: ...nstallation 10 Before installation 10 Requirements 11 Lifting 12 Mount of stands 13 Operation 14 Start up 14 Unit in operation 15 Shut down 15 Maintenance 16 Cleaning Product side 16 Cleaning Non product side 18 Opening and closing 19 Regasketing 23 How to contact Alfa Laval Contact details for all countries are continually updated on our website Please visit www alfalaval com and contact your loc...

Page 2: ... of the Plate Heat Ex changer 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 is in cluded 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 Al...

Page 3: ... If the PHE is closed down and taken out of service for for a longer period of time for any reason follow the same advice as previous section Indoor storage 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 media the PHE should be rinsed ...

Page 4: ... 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 All metal parts should be sent for material recy cling Oil and all non metal wear parts must be taken care of in agreement with local regulations Scrapping At end of use the equipment...

Page 5: ...ed on the frame plate Guiding bar Keeps the channel plates connection plates and the pressure plate alligned at their lower end Plate pack Heat is transferred from one media 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 ...

Page 6: ...ng temperatures as specified on the assembly drawing are to be exceed ed the supplier should be consulted 1 Space for logotype 2 Open space 3 Web site for service 4 Drawing of possible locations of connections For 3A units location of 3A tag 5 Space for mark of approval 6 Warning read manual 7 Date of pressure test 8 Maximum operating temperatures 9 Test pressure 10 Max permissible operating tempe...

Page 7: ...ds 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 which seals the channel and directs the fluids into alternate chan nels The plate corrugation promotes fluid turbulence and supports the plates against differential pressure Princ...

Page 8: ...nfiguration can be if a media need to be heated in one stage and then cooled down in next stage Each the connection plates can be configured by se lecting different kind of corner connections such as double or single corners passthrough or blinds Example of multi section set up End Plate II End plate I Channel plates Cooling in Product out Product out Product return Product Heating out Heating in ...

Page 9: ...ng plates Also transition plate need to be added in the package to prevent me dia to get in contact with the partition or pressure plate Example of use for Multi pass can be in processes that requires longer heating periods if the media re quires a slower heating Example of a multi pass set up Identification of plate side The plates are marked with plate name follow by 1 and 2 They are position wi...

Page 10: ...t subject the PHE to stress or strain To avoid water hammer do not use fast closing valves In automated installations the stopping and start ing of pumps and actuation of valves should be programmed so that the resulting amplitude and frequency of the pressure variation will be as low as possible If pressure variance is expected install efficient dampers Make sure that no air remains within the PH...

Page 11: ...aded ar ea Use for example a short bend directed side ways Pipe connection Avoid excessive force on pipe connections Fit the pipes so that no tension is transferred to the heat exhanger Nozzle loads are not permitted Pipes connected to the pressure plate and to the connection plates must allow 1 of the distance from the connection to the frame plate see assembly PHE drawing Applicable for 3A Stand...

Page 12: ... used when lifting the PHE Place straps according to picture Centre of gravity Centre of gravity is marked on the sides of the case The actual centre of gravity is located directly below this mark Position the lifting hook vertically in line with the mark for Center of Gravity Center of gravity Lifting hook Warning Never lift by the connections or the studs around them ...

Page 13: ...t the stands mounted Follow the instruction below 1 At delivery cover plates are attached on the frame plate and supporting column at the same positions where the stands shall be mounted 2 Remove the screws washers and nuts and remove the cover plates 3 Use the same screws washers and nuts to assemble the stands on the PHE according to picture Four screws and washers Two screws nuts and four washe...

Page 14: ...sure surge 3 If there is a vent valve installed at the exit make sure it is fully open 4 Increase the flow rate slowly 5 Open the air vent and start the pump 6 Open the valve slowly 7 When all air is expelled close the air vent 8 Repeat steps 1 7 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 rat...

Page 15: ...Shut down 1 Slowly close the valve controlling the flow rate of the pump you are about to stop 2 When the valve is closed stop the pump 3 Repeat steps 1 2 for the other side for the second media Continue with both sides of each section 4 If 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 be...

Page 16: ...t production cycle Refer to Sterilisation on page 16 Flow rates The flow rate during cleaning of product side should always be at least the same as the productions flow rate Increased flow rate may be required in some cases as e g milk sterilisation and processing of vis cous liquids or liquids containing particles Recommended limits for cleaning solutions 5 by volume AlfaCaus at max 70 C 0 5 by w...

Page 17: ... 10 min Rinsing 10 min Rinsing 5 mina a The need for an additional acid cycle in order to remove calcium carbonate scaling depends on the product In many cases it is possible to carry out cleaning at considerably longer intervals Sometimes it is possible to eliminate acid cleaning altogether Stop Acid 15 mina Sterilisation Rinsing 10 min Stop Products poor in protein High content of insoluble comp...

Page 18: ...d your local representa tive must be consulted Water of more than 300 ppm Cl ions may not be used for preparation of cleaning solutions 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 eye Liquids Description AlfaCaus A strong alkaline liquid for re...

Page 19: ... down the dimension A 9 Loosen and remove the bolts as shown in the figures below 10 Use the remaining four bolts equipped with bearing boxes to open the PHE During the opening procedure keep the frame plate and pressure plate always in parallel Skewing of the pressure plate during open ing must not exceed 10 mm 2 turns per Note Before opening the PHE check the warranty conditions If any doubt con...

Page 20: ... carrying bar If plates are to be numbered do this before removing the plates Plates need not to be removed if cleaning is done using only water i e without cleaning agent Warning To avoid hand injuries owing to sharp edges protective gloves should always be worn when handling plates and protective sheets Note Plates should be numbered do this before removing the plates Warning The plate pack may ...

Page 21: ...uids on page 18 1 Brush with cleaning agent 2 Rinse 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 Warn...

Page 22: ...lts 1 2 3 4 until the re action force of the plate package can be no ticed Make sure that the frame and pressure plate are in parallel during the closing procedure 5 Tightening the four bolts evenly in the num bered order 1 2 3 4 Continue alternately until dimension A has been reached 6 If the plate pack has been marked on the outside check this see step 7 in section Opening The cassettes shall be...

Page 23: ...r to Opening on page 19 and remove the plate that is to have a new gasket 2 Remove the old gasket 3 Assure that all sealing surfaces are dry clean and free of foreign matter such as fat grease or similar 4 Check the gasket and remove rubber resid ual before attaching it 5 Attach the clip on gasket to the plate Slip the gasket tabs under the edge of the plate 6 Repeat the procedure until all plates...

Page 24: ...English Maintenance 24 Plate Heat Exchanger 3490008529 rev 2012 01 EN EN DE FR ES PT IT SV DA FI NL RU PL NO HU SK CS SL LV LT ET EL BG RO ZH BG ...