Operating instructions Motor-Diaphragm Dosing Pumps Types
Contents
1. m 4 2 Technical data of the control unit for MEMDOS DX 4 3 Motor data TON EON ERE RE X E a MR 4 4 Technical data ATE E optional at MEMDOS SE T 5 Performance Curves ncocorenssnseopansonnannnarsenanasannnneconanzanunenannernannnansanneaaansansananseneensannes LT TE CO en am a ne LE 7 1 General notes of instruction VO 7 1 1 Installation of MEMDOS E with ATE servomotor EE TM Ta Installation IGeatialT oe u y Tox x cive rene xd E E n E 16 Ta el ean ct I eg ER 5 7 5 5 5 5 m 56 6 PI 6 6 7 um 7 8 8 7 4 Injection fitting assembly r 16 17 7 5 Electrical LLL E O 7 5 1 Circuit diagrams ATE servomotors 18 7 5 Instalallorrexalmpl amp T Cr i d S uuu uu 19 B i a SSS iy PE 19 21 8 1 Operating panel MEMDOS DX 19 BONIS on ee 8 3 Selectiorrof operating usos ULLA Voc cao ses G A A 4 5 PACE 9 Stroke lerigth2. A GZ 200 69 Q cH9P 8 3 SS 0S 00P v Tpe r3 3 91 9100 8 9 9 9pp v JO SJESS UJIA 063 dd d 8 8000 SSAJEA Eq ajqnoc S0 O uen W Ad 2 v 7000 uoiauuoa azis JEUIUION SAJEA I ioedeo er ei SOCWAW 8 3 5 3 x j j j C 13 aped epo OEM 1 aas pue Japlo 104 uolsian sauJ eJ uonopeuuoo 4 7 082 091 10 40 0w PIBPUEJS SZO 109 S jo d 1 3 SS 0S 0E8 M 91 Nd SL A 4 6 JOJOW Dy V uonoeuuoo jeloads 7 iV 8 v 9 0 UOJIA 9 PLO 9P X33 21 9 G juBn Jie Jooid uorsojdx B E 9 0 3 59 09 00 uonoeuuoo p pe uu sjeas 9 3 GC P 4 5 4 SS 0S 00F Oc P W OL 7 5 Jy jensayew 2 5 7 leads 7 08 0850 9LP H _ 4 56 05 00 9 00 0020 6P 9 31
3. uu nne cantus unu ia a Fina Cain D 10 Start up TEES REPERI BB 10 1 Start up of MEMDOS E with ATE servomotor _ 9 03 3 11 12 13 14 15 16 Maintenant eee 22 25 TL To EUDACATIONE uuu ee 22 11 2 Maintenance of bearings 22 11 3 Replacing the diaphragm 22 23 11 4 Circuit diagram electronic MEMDOS DX 24 25 Explosion proof dosing pumps 25 MM MU E EM 25 12 2 PEE E E ed 25 12 3 Dosing of flammable media 25 Spare 25 TrOUDIESNOO INO u u cn eco tement ntm ion 26 Notice d utilisation en francais Certificate of conformity 27 29 Hypalon and Viton are registered trademarks of DuPont Dow Elastomers Teflon is a registered trademark of the DuPont Company Hastelloy is a registered trademark of Haynes International Inc 9 03 1 Safety 1 1 General This Operating Manual contains basic information to be noted during installation operation and maintenance It is therefore essential that the Manual be read by the fitter before installing and commissioning the pump system as wel
4. Diaphragm was not screwed Screw in new diaphragm as far ruptures into diaphragm rod as far as as stop stop Injection nozzle blocked Clean injection nozzle fit larger one if necessary Pressure peaks because Change line or install pulsation metering line is too long or dampener For increased safety too narrow install relief valve see installation example Pump very noisy Roller bearing defective Replace roller bearing No or little oil in gearbox Refill oil as described in section maintenance Motor hums and connection _ electrical wiring doesn t start defective wrong size eee Esas capacitor correctly or or incorrectly connected replace Pressure too high Check process Indication of alarm states Low level alarm signaling Check functions as described in by red LEDs near display Low level main alarm chapter 7 MEMDOS DX control unit internal error If the problem cannot be corrected on the basis of the above data return the pump to the factory or contact our Techical Sales Service for further measures Repairs will be carried out immediately 26 15 MEMDOS E DX NOTICE DE MAINTENANCE ET D UTILISATION Instructions d s r ception Faire attention en ouvrant l emballage contenant la pompe doseuse les petits accessoires de celle ci raccord huile etc sont livr s en vrac dans le m me carton Comparer le bon de livraison avec les marchandises r ceptionn es et avertir te fournisseur a
5. before startup remount the cover 9 03 JEscH 1 11 Scope of delivery Note Please unpack the dosing pump and ordered accessories carefully in order not to miss small parts Immediately compare the scope of delivery to the delivery note If there are any discrepancies try to find out the reason For the transportation of the dosing pumps no special fittings are required It is however advisable to choose a transportation method which is appropriate for the weight of the dosing pumps e g wagon During transportation without oil the dosing pump should be lying Otherwise it must be tightened to the transportation device 2 General purpose The MEMDOS E DX may only be used in accordance with the specifications in the Technical Data Local regulations must be observed Suitable materials must be selected The operating manual must be consulted for installation commissioning and maintenance of the dosing pump Dosing pumps are produced according to highest quality standards and have a long service life Nevertheless some parts are subject to wear e g diaphragm valve seats valve balls To ensure long operating life visual checks are required regularly Operating and maintenance personnel must be able to access the pump easily The MEMDOS E can be operated in explosion hazard areas of zone 1 if the corresponding drive is taken into account Further information can be found in the operating manual Diaphragm dosing pumps f
6. La Memdos DX a un interrupteur interne et une commande ON OFF externe Les r glages de la course et de ta fr quence doivent tre mis au maximum lors de l amor age Aucune contre pression ne doit tre appliqu e la premi re mise en service Pour ce faire nous recommandons l installation d une soupape de d charge au refoulement de la pompe En cas d utilisation de pot d aide il faut le remplir avec le produit pomper Si la pompe n aspire pas enlever le clapet de refoulement et remplir la t te de pompe avec de l eau si l eau n est pas dangereuse pour le produit pomper puis remonter te clapet et d marrer la pompe 26 4 Si un vent est install sur la conduite laisser celui ci ouvert jusqu ce que le liquide sorte puis refermer celui ci En cas de liquide effervescent ouvrir l vent un coup tous les trois coups de ta pompe Lorsque la pompe est amorc e r gler correctement le d bit sur la course de la membrane Unit de contr le DX Panneau de commande Le panneau a deux Lads vertes pour op ration et contr le externe un Led rouge pour alarme un display 9 digits multifonctions et quatre touches pour programmation L entr e pour le ON OFF distance le niveau et la commande externe se trouvent en bas du panneau 8 1 Check display in operation g 1b Check display DX 4 external control green O 1 Check display 1 7 alarm red 1b Extern A 2 Remot
7. M Memdos ML Memdos E Memdos MR Memdos GMR Relevant EC regulations EC Low Voltage Directive 73 23 EEC EC Directive Relating to Machinery 89 392 EEC amended by 93 44 EEC Applied harmonized EN 292 1 and EN 292 2 Safety of Maschines standards especially prEN 809 Pumps and Pump Devices for Liquids Safety Requirements Date Signature of Manufacturer 2003 02 02 Information on the signer Mr Lucjan Gogolin Head of Technical Office This declaration is no assurance of characteristics in the sens of the product liability law The safety notes in the operating instructions must be observed 9 03 27 EC Declaration of Conformity We Lutz Jesco GmbH Am Bostelberge 19 D 30900 Wedemark hereby certify that the product described in the following complies with the relevant fundamental safety and sanitary requirements and the EC regulations mentioned below due to the concept and design of the version sold by us If the product is modified without our consent this declaration loses its validity Product description Diaphragm Metering Pump Model designation Memdos DX Relevant EC regulations EC Low Voltage Directive 73 23 EEC EC Directive Relating to Machinery 89 392 EEC amended by 93 44 EEC EC Electromagnetic Compatibility Directive 89 336 EEC amended by 93 31 EEC Applied harmonized EN 292 1 and EN 292 2 Safety of Maschines standards especially
8. atmospheres Information on the signer Mr Lucjan Gogolin Head of Technical Office This declaration is no assurance of characteristics in the sens of the product liability law The safety notes in the operating instructions must be observed 9 03 29
9. so that neither plant equipment nor buildings are damaged serverely in the case of chemical leakage due to the failure of wear parts e g diaphragm rupture or burst tubing If the chemical plant represents a potential source of danger the installation must be carried out so that no unreasonably high consequential damages occur even if the dosing pump fails Therefore we recommend to install leakage probes and containment tanks Dosing pumps are produced according to highest quality standards and have a long service life Nevertheless some parts are subject to wear e g diaphragm valve seats valve balls To ensure long operating life visual checks are required regularly Operating and maintenance personnel must be able to access the pump easily Periodic maintenance protects the dosing pump against shutdowns To increase the dosing accuracy and to ensure the functional reliability we recommend to use additional fittings These include backpressure valves relief valves leakage probes low level indicators and especially pulsation dampers to prevent pressure surges as shown in the installation examples chapter 7 5 9 03 JEscH Always use appropriate tools for the installation of plastic connecting parts To avoid damage never apply excessive force Plast parts especially PVC parts can be screwed and unscrewed more easily ifthe thread is lubricated with silicone grease before Note Forthis purpose the compatibility with
10. the chemical to be metered must be checked 7 1 1 Installation of MEMDOS E with ATE servomotor The ATE servomotor is connected to the pump and adjusted in the factory Forinstallation a sufficient mounting space of at least 150 mm must be provided for later maintenance Works The electrical connection of the drive must correspond to the local rules and may only be carried out by technical personnel The circuit diagrams chapter 7 5 1 show the two basically realizable possibilities of connection Cable type and cable cross section must be chosen according to the motor data The cable passage to the motor terminal box must be made professionally We recommend gland screw connections with traction relief The required protection class must be ensured by professional installation of the electrical connections Caution Please take into account that the ATE drive can only be controlled with the main motor running i e the ATE drive must be locked electrically Otherwise the adjusting eccentric wears out frequently or is destroyed 15 7 2 Installation location Caution Ambient temperatures exceeding 40 C are not permitted Radiant heat of apparatus and heat exchangers must be shielded so that the dosing pump can still dissipate its own heat sufficiently Exposure to direct sunlight must be avoided If the dosing pump is installed outside provide a roof to protect it against weather Mount the pump so t
11. 0 20 mA and 4 20 mA does not light up lights up Explanation 8 5 Factory setting These settings should only be made if the electronic unit is replaced Max number of strokes Keep the keys Mode and 0 pressed while applying voltage and set the maximum number of pump strokes using keys T and S After releasing the Mode key normal operation starts Alarm relay If the keys Mode and bare pressed while applying voltage display REO the relay is currentless in the case of error and OFF when pressing the keys Mode and T the relay pulls up in the case of error display RE1 9 Stroke length adjustment Caution The stroke length must not be adjusted when the pump is at a standstill Proceed as follows to adjust the stroke length 1 Turn the screw securing the adjusting knob anticlockwise to the left to release it 2 Set the stroke length to the required value in accordance with the delivery characteristics chapter 5 3 Retighten the screw without changing the set stroke length 9 03 10 Start up 1 Before starting the dosing pump all works mentioned in Installation chapter 7 must be carried out Fill the pump with the oil supplied At the same time the safety instructions must be observed 2 The dosing pump MEMDOS E is switched on by a control to be installed externally The MEMDOS DX has its own control system Electrical connection and the control system versions are explained in ch
12. 156 1 15 400 230 370 1 06 1 84 3 50 Hz MEMDOS 230 1 50 250 2 25 E DX160 380 Hz Circuit diagram of the drive motor Caution To avoid early wear of the gear drive adhere to the correct rotation direction of the motor by all means looking at the fan wheel counterclockwise MEMDOS E Li 12 L3 PE Y connection 1 12 L3 PE A connection Standard allocation MEMDOS DX grunge TD L2 L1 P E 380 17 JEscH Special versions Setting of coding switch KNG 2 60 2120 ST For other special versions please refer to the Any switch position corresponding separate circuit diagrams 1 Voltage input The electrical connection of the MEMDOS DX is 0 10V at terminals 1 and 4 shown and described in chapter 11 4 Circuit diagram electronic MEMDOS DX 7 5 1 Circuit diagrams ATE servomotors Type KNG 2 60 2 120 i Actuation Through sensors switches controller contacts Open 8 atc 2 Current input 0 20 mA at terminals 1 and 4 3 Direction of rotation 0 270 default setting 1 2 3 4 5 6 4 Output voltage 0 10V at terminals 1 and 3 9 03 18 JEscH 7 6 Installation example Explanation Dosing pump Suction line Electric agitator Chemical tank Relief valve Diaphragm shutoff valve Injection fitting Pulsation dampener COND OF 8 Operating 8 1 Operating panel MEMDOS DX The operating panel has two green LEDs for
13. U E z d stroke adjustment stroke adjustmen Ih E DX260 Vh 00 500 500 LLL LL E dL LLL pn pi ILLI 400 400 350 350 4bar od 200 bLA 1 2 3 4 5 6 7 8 910 Stroke adjustment Stroke adjustment E DX380 500 t stroke adjustme 6 Type codes Size wass apon yoe aes pue Japlo Joy OAd O 7 6a piepuejs eu sawely SLNO A 1095 Ne LO O V uoneouuoo 3 55 05 0 2 OL p L OSL OS XQ L 4 09 S Jo ed O V qawa 109 GO 0 D V A SSIOS OE M M319S BABA BI98dS 6 4 GG 0G 0 E jv 8 GC tr xq 59 0 8 69 O zdld z 9 11 8P X3 3 CLoO d 9 UOJIA 9 eroeds 7 juBr ure joo1d uorso dxe uonoeuuoo pepEelu uo ed H S 3 SS 0S 00PF C1 3 5 001d uoiso dxa gLP 1 jo S E S 14 6G 0G 00F P d ZLP H lt 0553 Fa Oc P IN OLP f pepeo Buuds 3 55 05 00 g uoinoeuuoo AM SEO 10jourseseud aaJu OSL 0510 0913 SZ 3 leads 7 OLL OLLO 6B Jdld Lior SZ 9 00 9L P H 9p 3 Z pe jeioeds 7 laas ulejs S 09 0500 Jaul 2504 uojed H
14. apter 8 MEMDOS DX operating elements 3 The manual capacity adjustment must be set to maximum stroke to improve priming During first priming no backpressure should be applied For this purpose we recommend to install a relief valve on the discharge side of the dosing pump 4 A previously installed priming aid must be filled with chemical first If the pump is not priming remove the discharge valve and fill water or chemical if not dangerous into the dosing head Remount valve and start priming 5 If a venting facility is available as separate unit open it and wait until liquid escapes Then close it again In the case of effervescent liquids allow the liquid to escape permanently approx 1 drop for 1 3 strokes 21 6 When correct operation is achieved set to required output by means of the adjusting knob refer to chapter 9 or the electrical remote adjustment For approximation refer to the performance curves chapter 5 Depending on the installation and the chemicals used these values may differ and must be checked under operating conditions 7 The manufacturer of the metering equipment is not responsible for damages due to excessive or low flow rates resulting from faulty pump settings or incorrect and insufficient installation of peripheral fittings 10 1 Start up of MEMDOS E with ATE servomotor Switch on the main drive motor of the metering pump With an electrical interlocking system only then can the ATE dr
15. e all danger to persons and the environment Statutory regulations must be observed Danger due to electric power must be excluded for further details refer to the VDE regulations and the regulations of the local public utilities Separate regulations must be observed if the dosing pumps are operated in explosion hazard areas The explosion hazard must be defined classification of zones and appropriate equipment selected by the owner Further information can be found in section 7 1 Installation section 7 5 Electrical connection and section 12 Explosion proof dosing pumps 1 7 Safety instructions for inspection maintenance and installation work The owner must ensure that all maintenance inspection and installation work is undertaken by authorized and duly qualified skilled personnel who have also studied the Operating Manual in depth The pump must always have come to a complete stop before starting any work on the pump The procedure specified in the Operating Manual for shutting down the pump system must be observed without fail Pumps or units in contact with potentially harmful media must be decontaminated All safety mechanisms and guards must be refitted and reactivated as soon as the work is complete Particular care must be taken when repairing dosing pumps which are used in explosion hazard areas Due to the risk of sparking care must be taken to prevent metal parts or tools knocking against one another The do
16. e te relais est activ et le display affiche E L Alarme niveau bas le Led Alarm est ON le relais est activ et le display affiche E L Erreur interne La pompe poss de un contr le interne qui arr te celle ci si aucune fr quence n est donn e deux secondes apr s avoir d marr le moteur par ex contre pression trop haute ou si le d tecteur de coup ne fonctionne pas le display affiche E 2 En cas de connexion d une d tection de rupture de membrane le display affiche Programmation faire en cas de remplacement de l lectronique Nombre de coups maximum retirer le courant appuyer simultan ment sur les touches Mode en remettant Se courant puis placer la pompe son nombre de coups maximum par la fl che Haut Apr s rel chement de la touche Mode la pompe est nouveau en mode normal Relais d alarme retirer le courant appuyer simultan ment sur les touches Mode et fl che Haut en remettant le courant display affiche RED le relais est hors tension en cas de d faut et OFF par la fl che Bas 1 relais sera sous tension cas de d faut et le display affichera BEI Maintenance Lubrification Les pompes Memdos E DX requi rent une l g re maintenance Le r ducteur est lubrifi avec une huile de viscosit ISO VG 460 suivant DIN 51519 correspondant un type 140 suivant DIN 51512 Le premier remplissage doit tre renouvel apr s 500 heures de fonctionnement ensuite un
17. e fois toutes les 5000 heures La capacit est de 0 25 jusque E DX 150 et 0 7 i pour tes autres La quantit peut tre v rifi e par l indication MIN MAX sur la jauge Pour les DX la pompe doit tre l arr t avant de renouveler l huile Remplacement de la membrane Vider la conduite pour liminer la pression La course de membrane de la pompe est plac e sur z ro pendant que le moteur fonctionne D monter la t te en enlevant les vis de fixation D visser la membrane dans le sens anti horloger Avant de placer la nouvelle membrane nettoyer la chambre de toute trace de produit Visser la nouvelle membrane dans le sens horloger en ayant mis un peu de graisse silicone sur le filet Mettre la pompe en service et r gler la course au maximum Arr ter la pompe et remonter la t te laide des vis Reconnecter les raccordements hydrauliques et d marrer la pompe SPERA 277 nae 70288 26 7 16 Certificat de conformit EC Declaration of Conformity We Lutz Jesco GmbH Am Bostelberge 19 D 30900 Wedemark hereby certify that the product described in the following complies with the relevant fundamental safety and sanitary requirements and the EC regulations mentioned below due to the concept and design of the version sold by us If the product is modified without our consent this declaration loses its validity Product description Diaphragm Dosing Pump Model designation Minidos A Memdos TM Memdos
18. eswitchoff amp 6 3 Levelconnection 1 Alarm Mode 5 4 Externalcontrol 5 Selection of operating mode 6 Setting of values Or mi 7 ON OFF switch 8 Display 2 3 4 9 03 19 ON OFF La pompe peut tre man uvr e ON OFF par la touche Le display affiche alors OFP Mode op ratoire Pour s lectionner le mode appuyer sur la touche Mode et le display affiche la position o se trouve la pompe ors peut modifier celle ci par la fl che haut ou bas en circulant dans le menu Mode interne INT appara t sur le display et apr s avoir rel ch la touche mode la fr quence programm e s affiche On la modifie par les fl ches Haut Bas Mode externe Le display affiche le multiplicateur 1 1 1 84 ou le diviseur 2 1 64 15 et le Led Externe est ON 0 4 20mA Signal Il est possible de choisir te signal en appuyant sur la touche mode et en appliquant la m me proc dure que pour le choix du Multiplicateur diviseur en cas d impulsions Apr s rel chement de celle ci l afficheur indique la fr quence correspondant au signal re u Le Led externe est ON En cas de courant exc dant 20 te display affiche OVL et en cas de courant inf rieur 4mA pour une programmation 4 20mA le display affiche E l allume le Led Alarm et arr te la pompe 26 5 Alarme La pompe poss de un contr le interne L alarme est indiqu e sur le display et est transmise distance le relais Pr Alarme niveau bas le Led alarm clignot
19. f the process Proceed as follows to set this mode 1 Simultaneously press the Mode and or keys until INT is displayed 2 Release the Mode key The momentary stroke frequency is displayed strokes min 3 Use the wand keys to change the stroke frequency Pulse control The pump delivers a constant flow of chemical per input pulse Up to 64 pulses are buffer stored if the pulse rate exceeds the processing speed To set the pulse multiplication division simultaneously 20 Technical changes are always reserved without notice press the Mode and gt or keys until one of the following values is displayed 1 1foraratio of 1 1 i e the pump executes one dosing stroke after each pulse 1 201 64 for pulse multiplication or 2 110 64 1 for pulse division The Extern indicator lights up Example 1 64 The pump executes 64 dosing strokes after each pulse 64 1 The pump executes one dosing stroke after 64 pulses The following settings are possible 1 2 4 8 16 32 and 64 Analog control The pump delivers a flow of chemical proportional to the input signal To set this operating mode simultaneously press the Mode and or keys until one of the following values is displayed 0 20 for 0 20 mA signal or 4 20 for 4 20 signal The stroke frequency corresponding to the current is displayed when the Mode key is released The Extern indicator lights up If the current is greater than 20 mA disp
20. hat the suction and discharge valve are in vertical position To ensure that the pump stands firm fasten it with screws on an appropriate foundation The system piping must not exert any force on the connections and valves of the metering pump To avoid incorrect metering after the process is finished provide an electric and hydraulic interlocking system 7 3 Drain pipe Caution Drainage or leakage from the separating chamber must be routed with a certain downward slope to the containment tank By no means must the drain pipe be returned directly to the chemical through the tank cover because otherwise effervescent media might enter the pump gear The drain pipe may only be routed to a collecting tank free of gases with a downward slope or to a collecting funnel also with 9 03 JEscH a downward slope above which the pipe ends at a sufficient distance Leakage can be returned via the funnel through the tank cover Besides possible leakage can be seen at the funnel Caution If a leakage monitor is installed in the explosion hazard area the electrical connection must be intrinsically safe The drive motor must be electrically interlocked to prevent additional medium escaping if a leak occurs 7 4 Injection fitting assembly Injection fittings are used to mix the metered medi um into a main stream and simultaneously fulfil a non return function The injection fitting is usually installed in the main line from ab
21. ive be adjusted To check the direction of rotation send short control pulses to the ATE servomotor If the direction of rotation is wrong the supply lines terminals 2 and 3 in the case of direct controls are reversed The ATE servomotor must be moved to the final positions in order to check the limit stop mechanism of the integrated limit switches When leaving the factory the angle of rotation is 270 If required the angle of rotation and thus the maximum flow rate can be restricted To achieve this the upper trigger cam is shifted by the required value 11 Maintenance 11 1 Lubrication The diaphragm dosing pump MEMDOS E DX requires little maintenance The gear of the pump is lubricated with gear oil of viscosity class ISO VG 460 according to DIN 51519 corresponds to SAE 140 according to DIN 51512 The enclosed first filling must be renewed after approximately 500 operating hours Further oil changes should be carried out every 5 000 operating hours The filling capacity is about 0 25 for gears of MEMDOS E DX up to size 150 and about 0 7 for gears of MEMDOS E DX up to size 380 The actually required quantity of gear oil can be determined by checking the min max markings of the oil measuring stick 9 03 Caution version To avoid damaging of the approximation initiator the pump must be switched off before removing the oil gauge 11 2 Maintenance of bearings The upper bearing of the
22. l as by the relevant operating personnel owner of the pump system It must remain accessible at the pump system for reference at all times In addition to the general safety instructions set out under this main heading Safety the special safety precautions set out under the other main headings must also be observed for instance in conjunction with private use 1 2 Warnings used in this Operating Manual This Operating Manual contains warnings which may endanger persons the environment and the pump system if they are disregarded These warnings are identified by the hazard symbol safety mark in accordance with DIN 4844 W9 The following symbol is used in conjunction with electric power safety mark in accordance with DIN 4844 W8 The word Caution appears in conjunction with safety instructions which may endanger the machine and its operation if disregarded Markings which are affixed directly to the pump such as Direction of rotation arrow Markings for fluid connections 9 03 JEscH Note Draws attention to supplementary information to make the work easier and ensure troublefree operation 1 3 Qualification and training of personnel The personnel employed for operation maintenance inspection and installation must be suitably qualified forthis work The areas of responsibility competence and supervision of the personnel must be precisely defined by the owner Personnel who do not have
23. lay OVL or less than 4 mA display E i the alarm indicator lights up the fault relay switches and the pump stops The stroke frequency ofthe pump is proportional to the input signal 8 4 Alarm The pump allows to control the metering process An alarm is indicated visually in the display and forwarded by the warning alarm relay Low level alarm signaling The Alarm LED blinks and the alarm relay is actuated The display shows the actual stroke frequency Low level main alarm The Alarm LED is on and the alarm relay is actuated The pump stops The display shows E L Internal error The pump carries out a self check which switches off the pump if no stroke has been carried out two seconds after startup of motor e g in the case of excessively high backpressure or if the stroke sensor does not work display E 2 The alarm is reset by removing the mains plug 9 03 The functions of the two indicators and built in fault relay can be seen in the following table LED 1 LED 2 Green a Pump running ssid running Display ES blue black Number of strokes Ium wam G Wi NN SION ceed ome 9 1 8 Power supply of L9 LE es a lD ILE LLL O flashes Number of strokes C alarm blue brown E L Pump faulty proximity switch PRES blue brown E 2 Pump faulty current lt 4 mA o o blue brown E 1 LED 2 lights up in operating modes 1 1 1 64
24. ns notification 26 3 MEMDOS E Li 12 L3 PE 1 12 L3 PE Y connection A connection Standard allocation MEMDOS DX amp N L2 L1 PE PE 156 0 160 380 Securit Lorsqu on travaille sur un quipement de dosage il faut observer les r gles de s curit en vigueur Avant toute intervention couper l alimentation lectrique et s assurer que la pompe ne puisse red marrer sans une intervention humaine Les connexions hydrauliques sont sous pression ll faut si possible purger la conduite avant toute intervention Avant le d marrage v rifier toutes les connexions hydrauliques et lectriques et si n cessaire les serrer nouveau En cas de retrait des connexions hydrauliques le produit peut endommager la pompe il faut imm diatement nettoyer celle ci pour viter toute corrosion future ou abimer la chambre de s paration et ou les pi ces de fixation m talliques Pour fonctionner correctement il faut s assurer que la pompe ait un refroidissement suffisant du moteur NOTE il se peut que le mod le DX chauffe consid rablement Dans ce cas on peut soit installer un ventilateur suppl mentaire soit supprimer le frein c ble noir d connecter de la boite borne et isoler D marrage Avant de d marrer la pompe il faut avoir respecter toutes tes conditions reprises dans te mode d installation et de s curit La Memdos E est allum e teinte via un interrupteur externe
25. o maximum while the motor is running Now the head is remounted by tightening it carefully with the screws Screws must be tightened crosswise e g top left bottom right top right bottom left The diaphragmis not properly sealed ifthe tightening torque is too low If it is too high the dosing head will be damaged Required tightening torque for dosing head screws Diaphragm g Torque 10 10 9 03 After connecting the metering lines the pump is started as described in chapter 10 startup If the diaphragm wear is excessively high try to find out the reason For this purpose please refer to chapter 14 Troubleshooting 23 11 4 Circuit diagram electronic MEMDOS When exchanging the electronic unit only remove the plug connectors not the cable DO NOT PULL AT THE CABLE 5 3 gt Alarm 3 zz RO RwR1 x xg se Ye standard configuration EE EE EE BE 26 Old E In operation mode R1 and Rw closed 7 In case of failure RO and Rw closed 5 8 zs e 2 uen 5 gt 2 Pise Stroke sensor Cursive corresponding CSA execution DE I m Level Break contact R1 Make contact Rw Change over contact Boards are connect with the backside together Extern Diagram for the input connector Low level indication switchoff 3 5 mm mono jack 3 5 mm stereo jack 1 brown 2 white 1 Low level main ala
26. onnection with 2 5 m cable D W Insulation class Electrical motor data MEMDOS 65 min 30 ms 5V DC must be voltage free for contact making 1 2 4187 16 32 64 150 Ohm 5V DC level probe w break contact for alarm empt Alarmrelay voltage free changeover contact 250V 2 5 or 30V DC 2 5 by voltage free break contact on site 40 C Digital display O OOOO LEDs for functional display 3 off green inoperation green external control Pressure sensitivekeypad __________ keypad 4 keys for programming and operation Weight ht if ports protected by caps or with serial plug in connectors Electrical motor data MEMDOS 515 1602360 _ Power Pzl oos _ Erequeney Protection dess Ps Ps _ somons F _ __ 149 _ amas 9 03 9 4 4 Technical data ATE optional at MEMDOS Pumptype Memdos E 4 156 Memdos 160 380 Servomotor 2 60 2 60 ST 2 100 2 120 ST Part No 79073 79082 79080 79098 Mechanical design Reversible servomotor with self locking step down gear Connections led out via cables 200 Angle of rotation limited by two intemal limit position switches For controllers with For controllers with For controllers with For controllers with switching output 3 continuous output switching output 3 continuous output point step control 0 2 Of4 20 mA point step con
27. operation and external control one red LED for alarm one 3 digit multifunctional display and four keys for settings The inputs for remote switchoff low level indication and external control are located below the display 8 1a Check display in operation 1b Check display DX Jescau external control green O 1 Check display 1 alarm red o XuoY 7 Extem 2 Remoteswitchoff 1b LIN 6 E I 3 Levelconnection Alarm W 4 Externalcontrol 5 Selection ofoperating mode 6 Setting of values C E eJ 7 ON OFF switch 8 Display 9 03 19 8 2 Switchon off The pump is switched on off using the 1 0 key While disconnected the display shows OFF By opening the contact for remote switchoff the pump is also tumed off The Extern LED Is on 8 3 Selection of operating mode The following operating modes can be set by simultaneously pressing the Mode and or gt keys Manual control internal operation Pulse control external operation Analog control control signal 0 4 20m manual control pulse control pulse control pulse control pulse control pulse control pulse control pulse control pulse control pulse control pulse control pulse control pulse control pulse control analog control analog control Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Manual control The pump delivers a constant flow of chemical per unit time regardless o
28. ove Installation from below is only recommended in the case of media with a tendency to crystallize in order to ensure that air bubbles are not entrapped For this type of installation it is advisable to select a form in which the injection fitting can be sealed off when removed 2 Vue 16 Extractable injection fitting from down below 7 5 Electrical connection The electrical connection of the dosing pump must be made according to the local rules and may only be carried out by technical personnel Cable type und cable cross section of the supply lines must be selected according to the motor data The cable passage to the motor terminal box must be made professionally We recommend gland screw connections with traction relief The required protection class must be ensured by professional installation of the electrical connections Caution Dosing pumps with explosion proof motors must be installed and commissioned by specialists qualified to work with equipment destined for use in potentially explosive atmospheres The user is responsible for ensuring that the explosion proof motors are connected correctly Both the motor and the pump must be grounded to prevent electrostatic discharges 9 03 JEscH Electrical connection data other types upon request Pump Voltage Power Current size Volt Watt MEMDOS 400 230 0 50 0 87 EA 3 50 Hz 2 05 3 50 Hz E DX 4 26 MEMDOS 0 90 1 55
29. pinion shaft is a sealed and permanenily lubricated ball bearing This function is simultaneously assumed by the motor bearing on the output side of the size MEMDOS E DX pumps up to E DX 150 The other rolling bearings in the gearbox and the plain bearings of the diaphragm rod are lubricated by the gear oil The oil also dissipates the heat generated All bearings must be examined for wear after 5000 hours of operation The service life of the rolling bearings depends on the loads to which they are subjected The bearings must be replaced after 5000 hours of operation if the dosing pump is operated at maximum load 11 3 Replacing the diaphragm In the case of a rupture the diaphragm can be replaced as follows 1 The chemical contained in the metering line is drained so that the metering lines become pressureless Please observe the aforementioned safety instructions for this purpose 2 The flow rate of the metering pump is set to zero while the motor is running Thus the diaphragm is moved to its front end position 3 The head is removed using an appropriate tool 4 Grasped at the edge the diaphragm can now be turned out counterclockwise 5 Before installing the new diaphragm the diaphragm flange section must be cleaned of the chemical Otherwise the diaphragm might be attacked from the rear side 6 The new diaphragm is turned in clockwise until it sits close grease screw thread 22 The stroke adjustment is now set t
30. polo Operating instructions Motor Diaphragm Dosing Pumps Types MEMDOS E DX Dosing Liquids Conveying Gases Control Systems Operating instructions MEMDOS E DX Lutz Jesco GmbH 2003 Address Lutz Jesco GmbH Am Bostelberge 19 D 30900 Wedemark PO Box 10 01 64 D 30891 Wedemark Tel 49 0 51 30 58 02 0 Fax 49 0 51 30 58 026 Repr sent par SPERIA Rue de la L gende 41 4141 LOUVEIGNE Belgique Tel 32 4 358 00 12 Fax 32 4 358 00 14 mail hesperia be www hesperia be Content 1 Safety 1 1 General 1 2 WWamihgsu used in this Manual 1 3 Qualification and training of personnel 1 4 Hazards due to non compliance with safety instructions 1 5 Safe operation Suwaqa asua 1 6 Safety instructions for the owner operator 1 7 Safety instructions for inspection maintenance and installation work 1 8 Unauthorized modification and production of spare parts 1 9 Impermissible modes of operation 1 40 D sing Gf CHEMICAIS uu n aces ceci zm cote ae ann cetus vas 1 11 Scope of delivery 2 General uuu ul u EU l 1 00 5 n 4 1 Technical data
31. prEN 809 Pumps and Pump Devices for Liquids Safety Requirements EN 50081 Parts 1 and 2 EN 50082 Parts 1 and 2 Electromagnetic Compatibility Emission of Noise and Noise Immunity Date Signature of Manufacturer 2003 02 02 A Ap A gt Information on the signer Mr Lucjan Gogolin Head of Technical Office This declaration is no assurance of characteristics in the sens of the product liability law The safety notes in the operating instructions must be observed 9 03 28 EC Declaration of Conformity We Lutz Jesco GmbH Am Bostelberge 19 D 30900 Wedemark hereby certify that the product described in the following complies with the relevant fundamental safety and sanitary requirements and the EC regulations mentioned below due to the concept and design of the version sold by us If the product is modified without our consent this declaration loses its validity Product description Explosion proofed Diaphragm Metering Pump Model designation Memdos E Memdos MR Relevant EC regulations EC Low Voltage Directive 73 23 EEC EC Directive Relating to Machinery 98 37 EC EC Directive for Equipment and protective systems intended for use in potentially explosive atmospheres 94 9 EC Applied harmonized EN 292 1 and EN 292 2 Safety of Maschines standards especially EN 809 Pumps and Pump Devices for Liquids Safety Requirements EN 13463 1 Non electrical equipment for potentially explosive
32. r controllers or analog 0 4 20 mA signals For control by contacts pulse control the stroke frequency can be changed using pulse division or multiplication For internal control own stroke the MEMDOS DX can be adjusted continuously between 0 and max 142 strokes min depending on the version 1 4 Technical data 4 1 Technical data Types 4 8 15 252 265 50 752 769 1101502156 160 200 2602 300 3802 max pres antep en el 8 pressure 15 23 23 72 2110 60 156 208 263 292 393 socks volume 26 ___ Max pressure 5J 8 Stroke freq 2 1 min 26 48 95 142 142 95 142 142 95 142 142 71 95 120 95 120 Diaphragms mm 9 12 318 ___ 5 ____ ___ 92 ____ Suction I mbar 5 76 8 C temperature i C CepeciyE T1 0 28 120 Ween rm Memdos DX 8 9 2 18 2 26 0 Weight SS Memdos DX 8 8 10 0 19 0 30 0 b Special sizes for 60 Hz operation Flow rate and stroke frequency data refer to 60Hz operation 2 Not suitable for G0Hz operation Ambient temperature for PVC metering head 40 C and for PP or stainless steel metering heads 60 C for a short time 80 C 9 At 60 Hz operation the values increase by factor 1 2 9 03 8 4 2 Technical data of the control unit for MEMDOS 95 264V AC 48 63 Hz Electrical connection O O O c
33. rchauffe des pi ces plastiques Une exposition au soleil est viter et si la pompe est mont e l ext rieur il faut pr voir un toit pour sa prot ger des rayons solaires et des intemp ries La pompe doit tre mont e avec les clapets aspiration refoulement dans un axe vertical Pour tre certain que celle ci ne bouge pas il est recommand de la fixer sur un support Les conduites ne doivent exercer aucune force sur les raccords Embout de fuite Toute fuite via embout doit tre dirig e vers un bac r colteur ou une tuyauterie d vacuation ouverte En aucun cas il ne peut tre raccord a une conduite ferm e venant dune cuve d aspiration pour viter des vapeurs de produit vers le r ducteur Connexions lectriques Le raccordement lectrique doit respecter tes r gies locales et tre fait par du personnel qualifi Le type de c ble et te diam tre doit tre s lectionner en fonction de la fiche technique moteur Pompe Voltage Power Intensit Volt Watt A EA 50 3 50 Hz E DX 4 26 Hz E DX50 156 Hz E160 380 3 50 Hz E DX160 380 Hz Connexion moteur triphas normal Pour viter d endommager le r ducteur v rifier que le moteur tourne correctement te ventilateur doit tourner dans le sens anti horloger Connexion du moteur DX avec frein MEMDOS 400 230 0 90 1 55 E50 156 3 50 Hz 50 50 250 120 370 50 Des modifications techniques peuvent tre apport es sa
34. rm red 2 Low level alarm white 3 0 ground black 3 5 mm stereo jack 1 red 2 bw wb 24 Technical changes are always reserved without notice 11 03 External control Phono jack cinch 1 Middle contact input brown 2 Outer contact 0 ground white Jescal External control CSA variant 3pin plug with cable 1 Input brown 2 0 ground blue 3 Not used Protective class of the control unit is only reached if ports are protected by caps or serial plug in connectors are used 12 Explosion proof dosing pumps 12 1 General The MEMDOS E explosion proof dosing pump is a motor driven explosion proof diaphragm dosing pump of equipment category 2 group In combination with an explosion proof motor Ex ll 2 GE Exell or Ex 2 GE Ex d de IIB IIC 4 it is used to meter liquids in potentially explosive areas of zone The pump bears the Ex identification Ex 12 G c k T4 03 ATEX 0085 Caution The pump must not be used to meter gaseous media or solids 12 2 Special conditions Compliance with the minimum requirements for the zone Classification must be ensured when using the dosing pump in potentially explosive areas Both the pump itself and the motor must meet with the minimum requirements 12 3 Dosing of flammable media All metal parts in the intake and delivery piping must be grounded to prevent electrostatic discharges when dosing explosive liquids Stainless s
35. rom the MEMDOS series are used in industry in the process engineering sector as well as in water and wastewater processing Two models of the MEMDOS E DX are available 1 0 4 bis 0 160 and 2 0 160 bis 0 380 I h JEscH f no control is required for constant metering the 3 Functional motor is connected directly to the terminal box The gear contains a single stage worm wheel set In this case MEMDOS E pumps are used runing in an oil bath just as the roller bearings Three phase and a c motors are available To Dosing happens while the push rod is displaced by change the dosing capacity either the stroke means of an eccentric The suction stroke is caused length can be adjusted from 0 to 100 or the by the resetting of the spring The stroke length is speed ofthe three phase motor can be controlled adjusted by limiting return travel of the poppet using by means of a separate frequency converter The manually adjustable eccentric as stop An MEMDOS E is optionally available with remote adjustment range from 0 to 100 is possible electrical adjustment of the stroke length ATE The intelligent MEMDOS DX is used ifthe pump is to be integrated in controls or automatic control systems MEMDOS DX allows the adaption to a large number of different control signals and system monitoring equipment The signals required for external activation of the pump can be simple voltage free closing contacts from water meters o
36. sing pump should preferably be moved out of the explosion hazard area in order to be repaired The points set out in the section Installation and commissioning must be observed before starting the pump system 9 03 JEscH 1 8 Unauthorized modification and production of spare parts The machine may only be modified or converted in consultation with the manufacturer Genuine spare parts and accessories authorized by the manufacturer ensure greater safety Liability for damage loss may be extinguished if other parts are used 1 9 Impermissible modes of operation The operational safety of the pump supplied can only be guaranteed when it is used in conformity with its intended use as specified in our contract documents especially the letter confirming the order The limit values specified in these documents must never be exceeded 1 10 Dosing of chemicals A When working on dosing installations the local safety rules must be observed e g wear personal protective clothes Before working on the dosing pump and plant disconnect it from the mains supply and protect it against reconnection Before the power supply is switched on again the dosing lines must be connected so that any chemical left in the dosing head cannot spurt out The dosing head of the pump as well as connections and lines of the plant may be under pressure Working on the dosing plant requires special safety precautions and may only be carried ou
37. t by instructed technical personnel Before startup all screwed connections must be checked for correct tightness and if necessary must be tightened up using appropriate tools connections at the dosing head are unscrewed during operation for venting or other reasons leaking chemical must be removed professionally This is the only way to avoid the danger of physical injury and corrosion at the dosing pump Leaking chemical might also destroy the diaphragm at its mounting points When changing the chemical check whether the materials used for the dosing pump and the other plant parts are chemically resistant If there is the danger of a chemical reaction between different media a thorough cleaning first is mandatory To operate the pump mount the fan shell in order to ensure sufficient cooling of the motor Protective class of the control unit is only reached if ports are protected by caps or serial plug in connectors are used Note Under certain operating conditions the drive motor of the DX version might warm up considerably To avoid unintentional contact provide an appropriate device A Adjustment works in the interior of the ATE drive optional at MEMDOS E must be carried out carefully Connections and internal limit switches might be alive Additional limit switches might be alive even with the auxiliary voltage switched off ATE drive A After installation works at the ATE servomotor or
38. teel is recommended for the dosing head Dosing pumps with diaphragms measuring more than 90 mm in diameter are equipped with special conductive diaphragms to prevent static charging Only the Original diaphragm may be fitted when ordering replacement parts 9 03 13 Spare parts Genuine spare parts from Lutz Jesco must be used Wear parts for the MEMDOS MR are available as a set of spare parts containing the following Pump diaphragm Valve balls Valve seats all valve seals Pump Material Part No dosing head valves size 4 26 PVC PVDF Viton 29750 PVC PVDF PTFE 29791 33698 PVC PVDF EPDM 25 14 Troubleshooting OF FAULT POSSIBLE CAUSE RECOMMENDED ACTION Pump not delivering Valves leaking Clean and remove air from valves See also startup of pump Tighten screw connections Valves incorrectly installed Reassemble valves Ensure that the valve balls of suction and discharge valve are located above the valve seats Suction filter foot valve or Clean and seal suction line suction pipe leaking or blocked No stroke movement Return spring broken Replace spring Consider density of the chemical Suction lift too high Pump delivering too little Valves blocked or leaking Clean and re seal valves or irregularly Pump delivering too Pressure on suction side too Install backpressure valve in much high pump siphoning discharge line Frequent diaphragm
39. the requisite know how must be duly trained and instructed If necessary this can also be undertaken by the manufacturer supplier on behalf of the pump s owner In addition the owner must also ensure that the relevant personnel are fully familiar with and have understood the contents ofthe Operating Manual 1 4 Hazards due to non compliance with the safety instructions Failure to comply with the safety instructions may endanger not only persons but also the environment and the pump system Non compliance with the safety instructions can lead to the loss of all entitlement to damages The following hazards in particular may arise Failure of major pump system functions Failure of specified methods for maintenance and repair Danger to persons due to electrical mechanical and chemical effects Danger to the environment due to leakage of hazardous substances 1 5 Safe operation The safety instructions contained in this Operating Manual must be observed The owner is responsible for ensuring compliance with local safety regulations 1 6 Safety instructions for the owner operator If hot or cold machine parts are a source of danger precautions must be taken by the customer to prevent contact Guards on moving parts must not be removed when the machine is in operation Leakages e g at the shaft seal of hazardous substances e g explosive toxic hot substances must be discharged in such a way as to exclud
40. tre nominal des tuyauteries pour le choix de la pompe doseuse Lors de l installation l utilisateur doit s assurer qu une fuite de produit ne puisse endommager d autres accessoires fuite pouvant tre caus e par rupture de conduite ou de membrane Nous recommandons l installation de sondes de d tection de fuite et de bacs de r colte Les pompes doseuses sont fabriqu es d apr s des standards de haute qualit et ont une longue esp rance de vie sauf les pi ces d usure normale telles que membranes billes joints Pour s assurer de la bonne long vit de la pompe un contr le r gulier est n cessaire Pour diminuer les risques de casse en fonctionnement anormal nous recommandons l utilisation d accessoires tels que soupape de s curit soupape de contre pression sonde de d tection de fuite sonde de niveau bas et ballons amortisseurs contre les fluctuations de pression Pour viter des dommages aux parties plastiques il ne faut jamais les serrer trop fortement au risque de les casser L utilisation de vaseline ou de graisse silicone peut aider au montage d montage des parties plastiques Des modifications techniques peuvent tre apport es sans notification 26 2 ATTENTION faut respecter la compatibilit du mat riel avec le produit Une temp rature ambiante gt 40 C n est pas autoris e sans ventilation forc e Un chauffage ou changeur de chaleur ne peut tre install proximit pour viter une su
41. trol 0 2 10V or Q 4 20mA switchable switchable 1ONmO _________ Voltage 230VAC 10 24 VAC 10 230 VAC 10 50 60 Hz 50 60 Hz 50 60 Hz 50 60 Hz Input impedance at voltage input 100 kOhm 100 kOhm S000hm Burden at current mp som T5 V T5 V Regulating time bevel 180s 1505 270 0 100 360s 3005 270 0 100 Load limit of the voltage output max 0 5 A max 0 5 Position repeating 0 1000 Ohm 0 10 VDC for control 0 1000 Ohm 0 10 VDC for control signal for remote 2Watt at tu 40 C with 0 10 V and z Watt at tu 40 C with 0 10 V and display max 0 20 0 20 mA 2 10 for control 2 10 VDC for control with 2 10 V and with 2 10 and 4 20 4 20 Ambient temperature 10 to 60 Weight 9 03 10 JEscH 5 Performance curves The flow rate depends on the viscosity of the medium and the hydraulic installation conditions The performance curves refer to water at 20 C and a suction lift of 0 5m Output valid for 50 Hz at 60 Hz higher by factor 1 2 lh EDX 4 lh E DX 8 stroke adjustment 0 1 2 3 4 5 6 7 8 9 10 E DX 15 7 ce r3 cn am j c 6 Stroke adjustment Stroke adjustment E Dx110 180 og _ TEE LLL L LL HAE 40 OT 0 1 2 3 4 5 6 7 B 9 10 stroke adjustment stroke adjustment Vh E DX160 E DX200 m u
42. u plus vite de manquements ventuels Pour te transport il n y a pas de recommandation sp cifique les pompes sont livr es sans huile l huile est dans un flacon externe Dans x cas o les pompes sont livr es avec huile elles doivent tre solidement fix es de mani re verticale Donn es techniques Types 4 8 115 1252 26 50 752 769 1101502156 160 200 2602 300 380 mex pres Les sl grogne pae leee peg pressure 15 23 23 72 2110 60 156 208 263 292 393 Max pressure br o 4 10 8 Stroke 1 26 48 95 142 142 95 142 142 95 142 142 71 95 120 95 120 Daphragms mm 82 64 9 42 48 it r Suction fit mbar 800 700 600 Mur ambient Cepeciy E71 58 1 28 1120 ____ Ween 7 4 7 6 10 2 18 0 8 0 9 2 18 2 26 0 8 2 8 4 11 0 22 0 Memdos DX 8 8 10 0 19 0 30 0 1 Sp cial pour fr quence 60Hz 2 Ne peut pas travailler en 60Hz 3 Temp rature ambiante t te PVC 40 C t te PP ou INOX 60X et pour court moment 80 C Installation Pour le choix de la pompe ou du local ou celle ci sera install e il faut respecter les r gles en vigueur Cela s applique la s lection du mat riel du mode de transport du liquide et de l installation lectrique Par ex d apr s le tableau ci dessus ne pas oublier de comptabiliser la longueur et te diam
43. v fpe 13 3 19915 15 5 092 0920 jo sjeas uj 12 0 1 002 0020 Jeui 9SoH Eq 9 qno IN 091 0910 jueusnip 921 JEUIUION Ayoedes jAyoedes uonong uonong e ef ef 2 I er qI Type codes Size Il 8 3 SOOW3N 3009 H91VN j 1 1 1 shoro 14 e o 7 Installation 7 1 General notes of instruction For the selection of a dosing pump when designing a plant as well as for the installation and operation the local rules must be observed This applies to the selection of suitable pump materials the handling of the chemicals and the electrical installation Before installing the pump in explosion hazard areas the dosing pump must be checked to ensure that it meets with the minimum requirements imposed by the applicable explosion protection regulations For this purpose the data on the rating plate of the dosing pump must be compared with the local requirements At the same time the technical data of the dosing pump see chapter 4 must be taken into consideration and the plant must be designed correspondingly e g pressure loss in lines depending on nominal diameter and length The designer and the user are responsible to make sure that the whole plant including the dosing pump is constructed
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