Sondex Operation and Maintenance Manual Plate Type Heat
Contents
1. _MINIMUM MM Please contact your SONDEX A S distributor if the plate heat exchanger is leaking when tightened to the minimum measurement 2 The starting up must be done without schocks and against closed valves SONDEX A S DK 6000 KOLDING gt DENMARK Ph 45 76306100 FIG 1 4 2 Correct operation This user manual provides information and instructions for correct and safe operation of the unit Many accidents are caused by incorrect use It is essential that you study the instructions carefully and above all ensure the availability to those who install maintain and operate the heat exchanger on a daily basis This manual is of no value if it is not available at the time when your staff needs it If a problem occurs with your SONDEX Heat Exchanger which is beyond the scope of this manual do not hesitate to contact us The installation should not be put into ope ration before all indistinctnesses have been solved To avoid injuries and damages follow the instructions and local applicable safety regulations Also take the necessary protective measures depending on the nature of your process or circumstances related to it at your plant Please note that our plate type heat exchangers are especially designed and built for the operating conditions pressures temperatures capacities and type of fluids pro vided by the customer Sudden pressure peaks beyond the norma2. Plate Type Heat Exchangers Operation and Maintenance Manual ii a t n l r F SONDEX EEE Yo Project Customer Exchanger type Serial number Year PED category _ Art 3 par 3 Cat 1 Cat 2 Cat 3 Cat 4 Approved by NB number Remarks The contents of this publication are based on the latest information available and the materials that are used at the time of printing However because of rapid develop ments in this field we cannot be held liable for changes in specifications affecting the contents of this publication COPYRIGHT Copyright SONDEX HOLDING A S All rights reserved No part of this publication may be reproduced or distributed without prior written permission of SONDEX HOLDING A S CONTENTS 1 FOREWORD 2 INTRODUCTION caniaii 2 ones eee hot eae eesesee reese acs tes 3 GAFET ALERT NOTICES serp acess bak ere cere ais oe ee ee ta eee ees 4 GENERAL 4 1 Identification of the heat exchanger 00 00 c eee eee 4 2 Correct operation anna aaaea aaa eee eee 4 3 Cautions 4 4 Thermal design 0 0 ccc teen enna So CONSTRUCTION sotneecaeaee cer eenees ens ee eeeert eee senses yee 5 1 Frame 5 2 Plates 5 3 Gaskets 5 4 Special executions 2 522 hacncnbewd de vae et echaedewdaete swam eto 5 5 AIGHUICN plates sssi lt 0 b 4 Face fa tE ek eae eer ee menih i 6 INSTALLATION 6 1 Requirements t
3. cooling water temperature to the exchanger is higher than the design e heating media temperature to the exchanger is lower than the design e steam flow not sufficient control valve malfunction e steam trap broken or jammed unit becomes filled with condensate plate package has been assembled incorrectly e unit is running in co current flow instead of counter current check with contract drawing and alter pipe work if necessary Check direction of pump flows air lock has developed in the plate package or pipe work MG 10 AFTER SALES SERVICE 10 1 Ordering parts When ordering parts it is important that the correct details are given At least the following should be quoted e Project and order number Exchanger type and manufacturing number see name plate e Required parts When ordering separate plates it is important that the correct plate code index and type of plate is given See chapter 5 2 When ordering separate gaskets it is important to indicate the correct gasket material When ordering tie clamping bolts the existing ones should be measured in order to get new ones of the same size and length 10 2 Modifications to the heat exchanger The plate heat exchanger is built up in modules and therefore flexible with respect to enlargements or reductions It is easy to change the capacity by respectively en larging or reducing the number of plates We would be pleased to advise you 10 3 Contacts A
4. long plate Thermal short plate ANN p A ND PA r I ASI 2 F oo HH Plate types 6 INSTALLATION 6 1 Requirements to the installation area It is very important that enough space around the plate type heat exchanger is kept free for servicing of the unit renewal of plates tightening of the plate package As a rule the free space around the unit should be 1 5 to 2 x the width of the unit you are to lift the heat exchanger itself straps should be used They should be placed as shown on the picture WARNING To prevent personal injury always use appropriate hoisting equipment If Piya i ip j tl Lifting Usually the heat exchanger will be supplied horizontally on a pallet The back side of the head will then be tightened to the pallet This allows you to transport the unit by means of a fork lift truck Rising of the unit e Remove all tightening elements from the pallet e Place straps around one bolt on each side as shown on the picture Never use steel cables or chains Lift the heat exchanger from the pallet Lower the heat exchanger slowly to vertical and on it s feet and place it in its end position on the floor e Remove the straps and tighten the heat exchanger to the floor Never lift the heat exchanger by using the connections or studs around them Attention ALWAYS Use the lifting eyes if fitted Lift the top side of the head Attach th
5. off valves Before start up Ensure that the steam control valve is fully closed e Ensure that the heat exchanger is fully drained of condensate e Start cold circuit first then the steam side e Open steam control valve slowly this prevents water hammer of any condensate in the steam line and reduces the pressure thermal shock to the exchanger Ensure that the steam trap is correctly sized to allow full condensate discharge this prevents water clogging inside the exchanger Check for proper operation e Check for pressure pulses in the system caused by the pumps or control valves If found stop operation and rectify Continuous pressure pulses will result in fatigue failure of the plates Visually check the unit for leakages Check that all vents are closed to prevent air being sucked into the system When in operation the conditions should not be changed The max condi tions specified on the name plate should not be exceeded 7 3 Shut down for a short period If the plate type heat exchanger has to be shut down for a short period please follow the following procedure e Slowly close the control valve in the hot circuit whilst maintaining the full flow in the cold circuit e Switch off the hot circuit pump e Cool down the heat exchanger to under 40 C e Slowly close the control valve in the cold circuit e Switch off the cold circuit pump e Close all remaining shut off valves 7 4 Shut down for a long
6. sondex dk DENMARK SONDEX Jernet 9 DK 6000 Kolding Tel 45 76 30 61 00 Fax 45 75 53 89 68 45 75 50 50 19 E mail info sondex dk Internet www sondex dk SONDEX
7. 5 4 Special applications If the plate heat exchanger works with several fluids at the same time it can be necessary to insert intermediate frames The intermediate frames are equipped with corner blocks forming connections be tween the different sections Two connections can be placed in the same corner block having connection to two different sections in the plate heat exchanger For the exact application of your plate type heat exchanger please check the docu mentation which was supplied with the heat exchanger 5 5 Right left plates 1 2 The SONDEX plates are designed in such a way that they can be Y used both as right and as left plates The plates just have to be turned 180 Excepted are types S1 S53 and SF52 which are dia gonal plates Here right and left plates are different Right and left plates On a right plate the flow runs from hole 2 to hole 3 or reverse from hole 3 to hole 2 On a left plate the flow runs from hole 1 to hole 4 or reverse from hole 4 to hole 1 The opening of the corner holes are described in a plate code index For instance 1234 means that all corner holes are open Every plate can be identified by the gasket configuration the plate code index and thermal short or thermal long execution a E RRR REE y Left hand flow plate with gasket Right hand flow plate with gasket X v D g amp a c amp N End plate with gasket Thermal
8. USTRALIA SONDEX Australia PTY LTD Phone 61 3 9707 5511 Fax 61 3 9707 5501 E mail info sondexaustralia com au Internet www sondexaustralia com ITALY SONDEX Italy S r l Phone 39 0363 905086 Fax 39 0363 905422 E mail info sondex it Internet www sondex it FRANCE Sondex France SARL 12 Avenue de Saules 69600 Oullins France Phone 0033478 463640 Fax 0033478 461942 E mail sondex wanadoo fr Internet www sondex fr SONDEX ROMANIA S C Sondex Romania SRL 50 Fagului Street 400483 Cluj Napoca Romania Phone 40 364 402 270 Fax 40 364 402 272 GE GERMANY SONDEX Deutschland GmbH Phone 49 4171 788330 Fax 49 4171 788350 E mail info sondex de Internet www sondex de POLAND SONDEX Poland Phone 48 58 676 0012 Fax 48 58 676 0497 E mail Ksw sondex pl Internet www sondex pl UNITED ARABIAN EMIRATES Gulf Sondex FZCO Warehouse No FZS 1 BU 01 Jebel Ali Free Zone Dubai Phone 9714 886 1027 Fax 9714 886 1028 E mail sondexgulf yahoo co in Internet pramod gulfsondex ae HONG KONG SONDEX Distribution Centre Hong Kong Unit 42A 2 F Cambridge Plaza Sheun Shui New Territories Hong Kong China Phone 85 2 3124 0228 Fax 85 2 3124 0221 HOLLAND SONDEX BV Phone 31 299 674 934 Fax 31 299 674 936 E mail info sondex nl Internet www sondex nl USA SONDEX Inc USA Phone 1 502 933 9991 Fax 1 502 933 9914 E mail sales sondex usa com Internet www
9. correct order fig 10 i e that the follower shall have a parallel opening motion e Pull the follower back towards the column e Remove the plates without damaging the gaskets Recommendation Mark the plate package before opening You could mark the plate package with a diagonal line on the outside fig 10a or num ber the plates in sequence Fig 10 Fig 10a 8 4 Cleaning the plates Use nylon or other types of soft scrubbing brushes with detergent Use Acetone or other types of solvents which do not contain chlorine to remove old gasket glue Alternatively use a lowtemp gas flame softly heating the reverse side of the plate Do not use any other type of gas which may produce a harder flame Remember ventilation Boiling water can be used with some success Consult a cleaning specialist for a suitable choice of detergent Ensure that all deter gents used are compatible with the plate and gasket material before use In case plates are removed for manual cleaning make sure they are re fitted in the same order Always remove plates one by one and number them A high pressure cleaner can be used but with absolute care and never add abrasives If the scaling or organic layer is thick the plates can be put in a barrel with qualified cleaning material Important Cleaning is an important part influencing the effectiveness of the plate heat exchan ger Insufficient cleaning can have t
10. e straps to the bolts close to the head NEVER Lift using the connections Lift the follower Lift using an intermediate plate Lift with a strap attached close to the follower Storage Should it be necessary to store the heat exchanger for a longer period 1 month or more certain precautions should be taken in order to prevent unnecessary damage to the equipment Preferably the heat exchanger should be stored inside in a room with a temperature around 15 to 20 C and a humidity of max 70 If this is not possible place the heat exchanger in a wooden box which is provided with a lining on the inside against penetration of moisture There should absolutely not be any ozone producing equipment in the room like electric motors or arc welding equipment since ozone destroys many rubber materials Also do not store organic solvents or acids in the room and avoid heat or ultraviolet radiation 6 3 Installing the pipe connections Depending on the type the SONDEX plate type heat exchanger will be provided with flanges couplings threaded pipes etc When connecting the pipe system to the heat exchanger make sure that no stress or strain is imposed by the pipe system on to the heat exchanger We advise you of the following e Heavy pipe work needs to be supported This will prevent heavy forces on the heat exchanger e Always install flexible connections on the follower to prevent vibrations on the heat exchanger These flexible c
11. hannels in plate s blocked Flush clean Check the pressure indicator Medium deviating from the Addition of for instance anti freeze will design increase the pressure drop Air in the system De aerate the pipe system Check the pipe work for possible air traps For nearly all leakage problems it will be necessary to dismantle the unit before any attempts to rectify the fault can be made Mark the area s where the leakage seems to be with a felt tip marker or similar before taking apart the exchanger Cold leakage is caused by a sudden change in temperature The sealing properti es of certain elastomers are temporarily reduced when the temperature changes sud denly No action is required as the gaskets should re seal after the temperature has stabilised Gasket failures are generally a result of old age e excessive exposure to ozone e high operating temperature above the temp limit of the material e exposure to pressure surges e chemical attack physical damage resulting from incorrect assembly work or damage e resulting from a misaligned plate check the hanging system at the top of the plate for distortion Decrease in performance is generally a result of e plate surfaces require cleaning or de scaling pumps or associated controls have failed e plate channels blocked liquid flows not as per design specification e associated chiller cooling tower boiler under sized or dirty e
12. he following results e too low circulation flow e insufficient thermal output life time of the heat exchanger will be shortened 8 5 Plate replacement The plates must be clean dry and free from oil or grease If there are any oil remains on the gaskets or on the gasket seating area then there is a high risk that the plates or gaskets shall slip out of place when the unit is being tightened If the gaskets are contaminated with dirt or grit then these could cause leakage Correct e make sure that all seating areas are flat clean and undamaged e always use new gaskets Fit the plates according to the Plate Sequence Sheet ensure all gaskets face towards the fixed frame plate head Alternate between left and right handed plates if the plate edges forma regular honeycomb pattern the left right hand sequence is correct see fig 11 8 6 Gasket replacement Glue free gaskets This type of gasket Hang on and Sonder Lock new generation of glue free gasket require no adhesive They are located by pushing the gasket fully down into the gasket groove or fastened by special devices Make sure groove and gasket are clean Glue type gaskets The surfaces need to be clean and free of oil Only use chloride free glues like Pliobond 20 or 30 Bostic 1782 3M EC 1099 and Bond Spray 77 Follow the instructions of the manufacturer these will be printed on the cover of the glue CAUTION When usi
13. is present but does not flow while the hot medium is flowing through the cold medium will start boiling and the exchanger will be damaged Sudden pressure and temperature changes should be prevented When a heat exchanger filled with water or a water mixture which is not in operation is exposed to temperatures below zero the plates can become deformed If a danger of frost occurs the heat exchanger should be drained completely Demountable plate heat exchangers can always leak We advise you to take this into account while installing Preferably you should install a drip tray underneath the heat exchanger to prevent leakages onto the floor and or harm to electrical equipment Short circuit moisture damage If the heat exchanger is being used with temperatures above 60 C or with aggressive fluids we advise you cover the heat exchanger with a screen plate to prevent the risk of touching If welding activities have to be carried out near the heat exchanger never use the heat exchanger for earthing the construction work Electrical currents can cause severe damage to both plate and gasket If you have to weld dismantle the connecting flanges and isolate the heat exchanger from the system 4 4 Thermal Design Sondex plate type heat exchangers are designed and calculated according to the newest technology If performance test has to be carried out the exchanger must be totally clean In the Sondex data sheet the nominal capacity a
14. l operating pressu re or pressure surges which can occur during starting up or stopping of the system can severely damage the heat exchanger and should be prevented SONDEX can not be held responsible for any damage as a result of any operation deviating from the original design conditions If you wish to alter the design conditions please contact us You may only commissi on the heat exchanger under the modified conditions after inspection and written approval by SONDEx Also the name plate on the heat exchanger will be adapted 4 3 Precautions All potential personal injury hazards are identified by safety alert symbol Bodily harm can be caused by e burning as a result of touching the heat exchanger or other parts of the installation e the uncontrolled release of pressurized media with which the danger of burning and other injuries is present e contact with chemicals e touching sharp edges of the installation Damage to equipment can be caused by external forces corrosion chemical action erosion material exhaustion water hammer thermal and or mechanical shock freezing wrong transport lifting Even after stopping the installation some parts of it can still be hot The heat exchanger may only be used with the fluids specified on the datasheet The hot medium may not flow through the exchanger without the cold medium flowing through This is to prevent damage to the exchanger In case the cold medium
15. nd pressure losses are mentioned The pressure loss can deviate up to 15 from the data in the data sheet depending on plate thickness the plate material and the difference in the two working pressures 5 CONSTRUCTION Upper bar Column Follower Plate package Lower bar Tie bolts 5 1 Frame The heat exchanger consists of a frame plate head a pressure plate follower a carrying bar a lower bar and a column Tie clamping bolts are used to press the plate package together The size and number is depending on the type of heat exchanger 5 2 Plates The plate package consists of plates with a groove along the rim of the plate and around the ports The number of plates is as well as size and dimension dependant on the thermal output required Depending on the application stainless steel or titanium plates might be used 5 3 Gaskets The groove provided in the plates holds the special gasket The purpose of this gasket is to prevent intermixing of the media and leakage to the outside The gaskets are selected to suit the actual combination of temperature chemical resistance and possible other conditions to be considered They can be supplied in Viton Nitrile or EPDM MO AN The following types of packings are being used in our plate type heat exchangers e Glue gaskets Sonder Snap e Sonder Lock gaskets new generation of gaskets Hang on gaskets Sonder Snap gasket Sonder Lock gasket
16. ng and maintenance of plate type heat exchangers supplied by SONDEX It is meant for those who are responsible for the installation the use and maintenan ce of the heat exchangers We recommend that you read this manual carefully before commencing any work 2 INTRODUCTION This manual is applicable for all heat exchangers produced and supplied by SONDEX SONDEX can not be held responsible or liable for damage as a result of in correct installation use and or maintenance of SONDEX plate type heat exchanger as well as not complying with the instructions in this manual Please note that our plate type heat exchangers are specially designed and built for the operating conditions pressures temperatures capacities and type of fluids provided by the customer Sudden pressure peaks beyond the normal operating pressure or pressure surges which can occur during start ing up or stopping of the system can severely damage the heat exchanger and should be prevented SONDEX can not be held responsible for any damage as a result of any operation deviating from the original design conditions If you wish to alter the design conditions please contact us refer page 24 You may only commission the heat exchanger under the modified conditions after inspection and written approval by SONDExX Also the name plate on the heat exchanger will be adapted 3 SAFETY ALERT NOTICES 3 Safety Alert Notice Following must be respected by installing running
17. ng commercial solvents and adhesives follow the manufacturers recommendations carefully as many of these materials are hazardous Ring Gaskets The ring gaskets are used in connection with intermediate frames by connections in the follower and by SW Semi Welded types It can be necessary to use a little glue for positioning the ring gasket during assembly of the heat exchanger Rubber Liners There is one type of rubber liners for connections in the head an another type of rub ber liners for connections in the follower 8 7 Assembling of the plate package and pressure testing e Lightly oil the tie clamping bolt threads Do not allow oil or grease onto the gaskets or the gasket seating faces on the back of the plates Wet or contaminated plates can be come misaligned during tightening In this case dismantle clean and dry all areas in contact with the gaskets Evenly tighten all bolts in the correct order refer page 17 fig 10 We advise the use of ratchet spanners e Ensure clamping is as uniform as possible thus keeping the frames and plates paral lel throughout the operation Avoid skewing the frame plates by more than 5 mm e Tightening is complete when the distance between the inside faces of both frame plates equals the A distance as shown on the contract drawing see fig 12 This tightening distance can also be calculated using the following formula Assembly distance No of plates x plate thickness c
18. o the installation area 0 0 cee es 6 2 Transport lifting storage cee eee 6 3 Installing the pipe connections 0 cc eee 7 COMMISSIONING OPERATION i206 00 00 ccc eee eee ence eee 7 1 Commissioning and pre checkS 0000 cee eee eee ees 7 2 Operation 7 3 Shut down for a short period 0 0 ccc ee eee 7 4 Shut down for a long period 000 cee eee ees 8 MAINTENANCE 0 000 ee eee nets 8 1 Clean in place CIP scvaaerberedidver eee dGebeee s Gdhewsnees 8 2 Some cleaning detergents 0 0 c eee eens 8 3 Opening the heat exchanger 0c cee eee ee eens 8 4 Cleaning the plates 0 0 0c ees 8 5 Plate fEDIACCMeCN a lt s cccc 2 ccd asad oven teedede ds ohana denbas wa eares 8 6 Gasket replacement 0 000 cc eee ee 8 7 Tightening of the plate pack and pressure testing 8 8 Maintenance of the heat exchanger 0 00 cece eee 9 PROBLEM SOLVING 220 sica kei aa gua atk Cede et ot ees G Eai oa eed 10 AFTER SALES BERVICE serpere reep e e veya eee see ee aways 10 1 Ordering parts i000 60 Qe eta ee to ake 2 eh en od hw Oe ow ede oe a 10 2 Modifications to the heat exchanger 000 eee eee ee 10 3 Contacts NOOO A OO CO WO 14 14 14 15 15 16 16 16 17 18 19 19 20 21 22 24 24 24 24 1 FOREWORD This manual is a guide for installation commissioni
19. oefficient The coefficients can vary depending on the model type but is often 0 1 mm e Finally check that all tie clamping bolts are in tension and clean any spilt oil off the head follower and plates e On completion the unit can be pressure tested test pressure is stated on the name plate If dimension A is not reached with application of maximum tightening torque e check the number of plates and dimension A on the data sheet e check that all the nuts and bearing boxes are running freely If not clean and lubri cate or replace If the unit does not fully seal it may be tightened step by step to give dimension A min This dimension is mentioned on the name plate see fig 1 However the minimum measure must not be exceeded 8 8 Maintenance of the heat exchanger Time interval once a year as a minimum Check temperatures and flows against commissioning data Check general condition and look for any signs of leakage Wipe clean all painted parts and check surfaces for signs of damage touch up if necessary Check bolts and bars for rust and clean Lightly coat threaded parts with molybdenum grease or a corrosion inhibitor ensure that no grease etc falls onto the plate gaskets If rollers are fitted to the follower lubricate the bearings with light machine oil 9 PROBLEM SOLVING If you have problems with your plate type heat exchanger in most cases these can be solved by your own per
20. onnections also prevent expansion of the pipe work caused by temperature influence onto the heat exchanger These flexible connections need to be fitted in a longitudinal direction to the plate package e The pipe work needs to be thoroughly cleaned and flushed before connecting up to the heat exchanger e Always install vents on both sides of the heat exchanger Note For proper venting the vents should be fitted on the highest point in the direc tion of the flow of the medium preferably on an air vessel To enable the heat exchanger to be opened when necessary shut off valves should be provided in all connections Make sure that the pipe work connected to the heat exchanger is secured against pressure peaks surges and temperature shocks Threaded pipe connections If a plate type heat exchanger is provided with threaded pipe connections make sure that these connections do not rotate when fitting to the pipe work It could damage the gasket on the start plate You need to make counterhold on the connection Flange connections If the connection is rubber lined the liner will act as the flange gasket Bolt the connecting flange directly to the endplate using the drilled and tapped holes provided Tighten the bolts evenly do not over tighten as this could strip the threads cut into the frame plate If loose backing flanges are fitted to the heat exchanger a suitable gasket is required to seal the flange Unless
21. otherwise stated the liquid circuits should be connected to flow in reverse directions through the exchanger counter current Refer to the contract drawing or quotation details if the connections are not marked H9 7 COMMISSIONING 7 1 Commissioning and pre checks Commissioning may only be done by staff specially trained for the job or by SONDEX commissioning engineers Control maintenance and repair of the installation may only be done by authorized trained and properly instructed staff Maintenance and cleaning may only be done with a heat exchanger cooled to under 40 C and shut down Check if all connections are fitted correctly see also 6 3 Filtration The media flowing through the heat exchanger should not contain particles larger than 0 5 mm diameter length If necessary inline filters should be fitted Check the pressures and temperatures of the media and make sure that these are not more than the values specified on the name plate 7 2 Operation Fully vent the system e Close shut off valve fitted between pump and exchanger e Fully open valve fitted into return line from the exchanger e Start the circulation pump normally placed by the inlet e Gradually open closed shut off valve between pump and exchanger e Vent system again if necessary Repeat the above for the secondary circuit When using steam as one of the media Use slow acting steam control valves and open slowly shut
22. period If the unit is to be taken off line for an extended period of time then the following pro cedure should be followed Point 7 3 must be followed then Allow unit to cool down Drain all circuits Lubricate threads on the tie clamping bolts Loosen tie clamping bolts until the plate pack is loosened max A size 10 The tie bolts should not be removed or loosened to such an extent that dirt is allowed to enter in between the plates We recommend that a warning notice is attached to the exchanger to remind personnel that the tie clamping bolts need adjustment before the unit can be put back into service Cover the plate pack with black plastic to exclude any sunlight Please also see chapter 6 2 Storage 8 MAINTENANCE A 8 1 Clean in place CIP CIP cleaning clean in place by circulating cleaning detergents To use CIP cleaning it is a condition that the scaling on the plates is soluble All materials in the whole circulation system of course have to be resistant to the clea ning detergent We advise you to ask for a confirmation from the supplier of the cleaning detergent that it will not damage the materials in the heat exchanger If the solution requires recirculation select a flow that is as high as possible and certainly no less than the service or product flows Follow the instructions as given by the detergent supplier cleaning specialist We suggest that for recirculated cleaning dete
23. rgent methods the fluid should be pumped through the exchanger for no less than 30 minutes Rinsing After using any type of cleaning agent always rinse thoroughly with fresh water If cleaning in place then circulate fresh water for at least 10 minutes 8 2 Some Cleaning Detergents Oil and grease can be removed with a water emulsifying oil solvent i e BP system Organic and grease cover can be removed with sodium hydroxide NaOH maximum concentration 1 5 max temp 85 C Mixture for 1 5 concentration 5 Itr 30 NaOH per 100 Itr water Stone and limestone can be removed with nitric acid HNO3 max concentration 1 5 max temp 65 C Mixture for 1 5 concentration 2 4 Itr HNO3 62 per 100 Itr water Nitric acid also has an affective build up effect on the passivation film of stainless steel CAUTION Nitric acid and Sodium Hydroxide may cause injury to exposed skin eyes and mucous membranes Use of protective eyewear and gloves is strongly recommended 8 3 Opening the plate heat exchanger When opening and assembling the heat exchanger observe the following e Measure and note the actual A size e Use the correct tools and lubricant e Shut down the heat exchanger as described under 7 3 e Make sure the heat exchanger cools down lt 40 C e Ensure there is no pressure on any part of the unit e Clean the tie clamping bolts and grease the threads e Loosen the tie clamping bolts equally in the
24. servicing plate heat exchangers Keeping current local safety regulations Before any work begins ensure that the exchangers are pressureless and cooled till under 40 C Use gloves for preventing any injury from sharp edges when handling plates In all cases ensure that all laws and regulations are strictly kept concerning human environment protection YELLOW TRIANGLE Refer to applicable SAFETY ALERT notices within the manual All SAFETY ALERT notices are applicable to personal injury and identified by the fol lowing symbol 4 GENERAL 4 1 Identification of the heat exchanger All plate type heat exchangers supplied by SONDEX are provided with a name plate On this plate the following details are specified type of heat exchanger e year of manufacture e manufacturing number nominal capacity in kW e transmission area in m e max working pressure in bar e test pressure in bar e max working temperature in C e min assembling measure in mm SONDEX A S eG PLATE HEAT EXCHANGER TYPE YEAR MANUFACTUR NO MARKING NOMINEL CAPACITY KW L H TRANSMISSION SURFACE 2 ASSEMB RE MM MAX REN AX S amp EoSURE BARG PRODUCT MEDIUM PRODUCT MEDIUM PS MAX WORKING PT MAX TEST PRESSURE BARG PRESSURE BARG FLUIDA V VOLUME IN LTR TS WORKING TS WORKING TEMP MIN C TEMP MAX C IMPORTANT 1 The plate heat exchanger must not be assembled under the stated minimum assembling measure
25. sonnel Please find below a summary of possible problems as well as possible causes and solutions A condition for the continuous proper functioning of your plate type heat exchanger is in strict compliance with the permissible values for pressure and temperature mentioned on the name plate Exceeding these values even as short lasting pressure peaks will cause damage to the unit and be the cause of problems To avoid cosily repairs we advise you to have the installation work and maintenance carried out by properly trained personnel You can also contact relevant SONDEX Sales Office Leakage At the connections Check the rubber liners if fitted Check the flange gasket if fitted Check the O ring Fit the pipes tension free Mixing of primary and Check the plates for holes and or secondary circuit cracks In plate package Check the assembly distance Check the condition of the gaskets Check the proper position of the gaskets The operating conditions Adjust the operating conditions deviate from the specification Insuffi Air in the system De aerate the pipe system cient Check the pipe work for possible air traps capacity The operating conditions Adjust the operating conditions deviate from the specification The heat exchanger is dirty Clean the heat exchanger The connections have been Redo the pipe work interchanged Too high Flow larger than the design flow Adjust the flow pressure drop C
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