AMXI User manual
Contents
1. AMXI SERIES AMXI 441 dU 400 350 600 120 150 120 250 lt The values in table are reference ones within 40 C 4 3 Notes for Installing the Piping System 1 Outlet Piping 2 Throttle Valve 3 Priming Piping A 4 Priming Valve IAS bi EK 5 Check Valve Se as gt N 6 Outlet Pressure Gauge Ga Ge b Io i 7 Motor ae 8 Pump 9 Inlet Pressure Gauge om 10 Inlet Piping TIE rA 11 Inlet Piping Support dd G 12 Vibration Damper 10 ditza Ze GO E ed 13 Filter ed H l 0 01 0 02 slope Inlet Ta beri AE 7 WY 4 e F 15 Foot Valve IA S K Lai j GE fe Ne x LL Good EO ut D ty ty ny ny fy iy A D iy iy ti A fil fil iy iy WS VE Ge Fig 4 1 Bad Piping Designs i Gk E e A e E OO EEN aa LI b EE J wa an oo a erl a L d X H A d gt e erit L SO d i i a Kr u d gt 0 5m L y or d edi A gt 2D SOT E Ge gt 1 5D rF F EE B EEE D Diameter gt 1 5D al E AS A MA A Fig 4 4 dei Fig 4 3 AMXI SERIES Items to Note Suction condition must satisfy NPSHa gt NPSHr 0 5m Reduce inlet Head as much as possible Use straight and short piping The pipes should have adequate structural support and shouldn t use the pump as its primar2. Q MANAGEMENT Reg No 059 A MAGNETICALLY DRIVEN CHEMICAL PUMP USER MANUAL S GOIRI Symbols used Situation where improper handling or operation failure to follow this manual would almost certainly result in death or serious bodily injury DANGER Situation where improper handling or operation failure to follow this manual LAN could result in death or serious bodily injury WARNING Situation where improper handling or operation failure to follow this manual could result in bodily injury or equipment damage CAUTION AMXI SERIES Table of Contents beek Foreword Safety Requirements Inspecting the Pump Prior to Unpack the Carton Install the Pump Installation Piping and Wiring Notes for Operation Operating Procedure and Notes Maintenance and Inspection Incorrect Usage and Selection 2 3 A 5 6 7 8 9 Repair and Warranty Annex A Disassembling the AMXI Pump Annex B Exploded View and Parts List 1 Foreword AMXI SERIES Thank you for purchasing an ASSOMA pump To ensure proper operation and maximum efficiency please read this instruction manual carefully Failure to follow the recommended operating conditions outlined in this manual may result in serious personal injuries and or equipment damage 2 Safety Requirements This section lists general information about the safety The relevant safety requirements of installation wiring operation and
3. 6 Impeller deformed 6 Contact distributor Ring 2 Cracks 2 Replace 1 Resistance of three phases and 1 Repair or change if insulation impedance abnormal is found 2 Check amount of lubricant when 2 Keep amount of lubricant using open bearing at proper level Table 7 2 12 AMXI SERIES Wear limit Time to change Time to change OSTE e e EI BS AMX1 2 SHP E Q E b Ze EZ SO i 7 3 Preventive Maintenance Operational data like vibration flow rate voltage etc can be collected and upper and lower limits can be set for each of the values The collected data can be used for trend analysis see Fig 7 1 which can be a basis in which to determine when to carry out preventive maintenance AMXI is made at factory with vibration below 3 0 mm sec rms measured at flange edge of bracket and the noise value is below 80dB at rated point UCL LCL Measured Date gt gt 4 UCL Upper contorl Limit gt LCL Lower contorl Limit Time AMXT s powerful permanent magnetic coupling could adversely affect persons who are assisted by electronic devices such as pacemaker Be sure to turn the power off before performing any type of maintenance AMXI SERIES repair or inspection Make special provisions so that no other operator mistakenly turns on the power supply while someone is working on the pump In a noisy or poo
4. Check for oxidation or corrosion of the front casing bracket and base plate Check for leakage of the pump and the piping system Check the pump exterior for any physical damage such as corrosion paint stripped off Operation 1 Check for irregular sounds and vibrations 2 Check any abnormal overheat on the surface of motor three phase current is imbalanced bearing noise foreign material blocking the vent of fan Check the 1n tank fluid levels and inlet outlet pressures Check the power supply and motor loading Check and test run backup pumps regularly to ensure they can function properly when needed Table 7 1 7 2 Periodic Maintenance 1 The following items should be inspected quarterly referring to table 7 2 2 Pump s disassembly assembly and notes to be attended refer to Annex A Inspection Item 1 Cracks 1 Replace 2 Scratch marks except when pumping 2 Contact the distributor particle laden fluids 3 Crystallization or sludge 3 Clean 4 Shaft support loose or deformed 4 Contact distributor Front Casing pareren corroded or swollen O ring Scratch marks or cracks 1 Contact distributor Cracked bearing or crystallization 2 Contact distributor Impeller and 3 Bearing displays signs of some wear 3 Replace if worn Magnet and tear excessively Assembly Crystallization and other sludge 4 Clean 2 Foreign objects stuck in impeller 5 Remove the objects JL Front and Rear Casing
5. installed if the horizontal section of the outlet piping is very long Cautions when dangerous liquids are transferred When the pumps are used to transfer the dangerous liquids mentioned as below the pumps piping and fittings must be checked and watched so that the liquids can not be leaked WARNING Leaking the liquids may result in personal injury and or explosion fire accidents a Explosive and inflammable liquids b Corrosive and stimulus toxic liquids c Liquids could directly harm the human body or detrimental to health d Liquids could produce a chemical reaction 4 4 Wiring The wiring system should be done properly using premium equipment and complying with rules and standards set by the electrical company The following recommendations should also be implemented 1 Power frequency voltage and capacity should strictly follow according to motor 7 AMXI SERIES specification sheet and name plates 2 Please select the proper non fuse switch NFB according to the rated current of the motor 3 When using the pump for outdoor applications please make sure the switch is protected from rain 4 Keep the electromagnetic contactor MC from a pump with suitable distance and clearly mark warning sign to avoid false start 5 Tags at the end of wires or Diagram shown in the terminal box and method of connection are based on the number wires phases power voltage and mode of start for the motor Be sure
6. operating pressure Pressure gauge should be made of material that 1s corrosive resistant otherwise a diaphragm should be used Pressure Gauge 3 A valve can be installed on the piping that leads to the pressure gauge to facilitate maintenance and to lengthen the gauge s service life During operation if the pressure gauge reading fluctuates either there are air bubbles in the system or cavitation has occurred A check valve should be installed in the following situations 1 Outlet piping is long 2 Head of outlet is more than 15m Check Valve 3 Discharge pressure exceeds 2kg cm and flow rate exceeds 3m sec 4 5 Priming Piping Two or more pumps share the same outlet piping system To prevent back flow water hammer from damaging the pump during unexpected power outages Acontrol valve can be used for controlling the flow of fluids Do not run the pump with the control valve closed for an extended period of time When starting the pump always start with a closed valve and then slowly open the valve to obtain the desired operating pressure and Control Valve flow Always open or close the valve gradually To facilitate the adjustment of discharge flow and the adjustment of motor overload it is recommended to install valves on outlet piping And if both a check valve and a control valve are to be installed the order of allocation is pump gt Check Valve gt Control Valve Exhaust Vala A vent should be
7. to connect the power cable in accordance with name plate for the motor and the connection diagram in the terminal box 6 Select the proper size of wire for power wiring and tighten screws to prevent loosening Table 4 1 lists the reference value and make sure to follow local electrical regulations Table 4 1 Wire diameter and terminal locking torque Minimum diameter Locking torque 1 Be sure not to performing any type of maintenance while the power turns on It may lead to electric shock 2 Power supply and wire connecting work should be performed by qualified personnel only After wiring be sure to replace the terminal box cover in its original position Failure to do so could result in electrical shock 1 Install an earth leakage breaker The operation of a pump without using an earth leakage breaker may cause an electrical shock Install an optional leakage breaker in the system before running operation Grounding wire should be consistent with the third type of grounding grounding resistance 1s 10Q or less Each pump must have a separate grounding wire directly connected to the common ground terminal and must not form a loop between wires If the long wiring results more than 3 voltage drop in the line replaces with bigger size of wires WARNING gt 5 Notes for Operation 5 1 Dry Running 1 Our pump use the transfer fluid as its internal cooling system therefore dry running the pump can cause the
8. valve should be installed to make disassembling of the pump easier The valve should only be shut off when the pump is to Control Valve be detached for maintenance or repairs We recommend the use of valves that have the least loss when fully opened like a gate valve It is generally not recommended to install a filter in front of a Filter pump which can unpredictably increase suction system resistance If a filter has to be used it should be cleaned regularly to ensure a smooth flow The material used should be corrosion resistant otherwise a DE hoot pressure gauge diaphragm should be used During operation 1f the vacuum gauge reading fluctuates either there are air bubbles in the system or cavitation has occurred The weight of the outlet piping should be properly supported to prevent putting excessive stress on the pump see Fig 4 1 A priming piping must be installed if the suction system does not General employ positive pressure 1 e upward suction see Fig 4 1 Requirements The flow rate in the outlet piping should not exceed 3m sec The ability for each component in the piping system to withstand pressure should be calculated to determine the maximum allowable operating pressure Outlet Piping AMXI SERIES Items to Note Upward suction pumps that do not have a self priming cylinder should have a priming piping system Pressure gauge used should be able to read beyond the maximum
9. ar the pump Transport installation piping and wiring connections operation adjustment maintenance and inspection should be carried out by qualified personnel Having unqualified personnel perform these tasks could result in electrical shock injury or fire Do not block name plate or warning labels for view Do not stand on the pump or use the pump as s step under any circumstances Otherwise you may experience a serious injury Disposal of used or damaged pump must be done in accordance with local laws and regulations AMXI SERIES 3 Inspecting the Pump Prior to Unpack the Carton Install the Pump 1 2 3 4 5 6 7 Total Head H Check the pump exterior for any physical damage that may have been incurred during shipping Use a small screwdriver to rotate the impeller of the motor s cooling fan The fan should turn easily If the fan feels tight or if there are unusual sounds the interior of the pump may have been damaged during shipping If there is any damage to the pump contact the shipping company and the distributor immediately to determine who should pay for the damage and to arrange for replacement parts Each pump has a nameplate indicating the pump model MFG number rated head flow rate and motor power voltage and frequency Check these data to ensure they comply with your order and application Although some motor marked usable for both 50Hz and 60Hz but the impeller size of
10. g 1 Produce vibrations and noise 5 Foreign objects stuck in impeller 2 Reduced efficiency and flow Serious cases may S resultin dry running Low flow over extended period E dd cool ING D bg 2 Excessive radial and axial force reducing service of time life of bearing and thrust rings Inlet valve closed Dry running seriously damaging the pump 1 Low NPSHa resulting in cavitation Transfer fluid temperature too a E 2 Reduced strength of the magnet resulting in decoupling 1 Rapid wearing of the bearing prt Carnes Nel OE 2 Wearing of the impeller and casing surfaces Deformation of the O ring Result in leakage RE SZ 1 Resulting in vibrations and noise 8 P 2 Reduced pump performance and fluid flow 1 Produce vibrations and noise E Damaged motor bearings 2 Overloads the motor 3 High Motor temperature Wear rine v Maff 1 Produce vibrations and noise 8 2 Overloads the motor z i 1 Produce vibrations and noise z Ida aaar ler beatings 2 May result in fracturing of the impeller shaft D 7 7 l Pump s base screws loose _ Produce vibrations and noise be z B A ne or foot 1 Reduced pump performance and low flow rate or AP may result in cavitation 2 Serious cases may result in dry running 1 Low flow or no flow 2 Pump unable to dissipate heat 3 Serious cases may result in overheating of the pump and outlet piping Blockage of the outlet piping 9 Repair and Warrant
11. h the fluid s concentration therefore the selected pump material should be able to withstand the corrosive properties of the fluid 2 When the fluid s viscosity and or Specific Gravity differ from that of water the shaft power flow rate and pump head may change also 5 4 Particle Size Sludge 1 The service life of a pump can be greatly shortened by pumping fluids that carry small particles or sludge Its service life is dependent on the concentration of the particles its size and hardness 2 For particle concentration less than 5 particle size smaller than 50um and hardness within 80Hs which has SiC bushings can be used However a shorter than normal service life can be expected Should foreign matter enter the pump it may cause pump damage or failure Turn off the power at once and remove the obstruction CAUTION 5 5 Maximum Operating Pressure The pump s maximum operating pressure is dependent on the operating temperature and the structure of the pump Please refer to figure 5 1 for the recommended maximum AMXI SERIES operating pressure for our AMXI SERIES pumps figure 5 1 6 P Kg cm2 tee Triei AMXI 542 543 545 653 655 i OTN Gide 2 AMXI 420 T C 5 6 Minimum Flow Our pump uses the pumped fluid as its cooling and lubricating system A low flow rate may result in increasingly high temperature within the pump and increased radial a
12. high 3 NPSHa too low resulting in cavitation 1 High frequency vibration and noise NPSHa too low 2 Fracturing of the bearing and thrust rings resulting in cavitation 3 Decreased pump performance and low flow rate 4 Serious cases may result in dry running anticipated 2 Decoupling of the magnetic drive 1 Motor overloading Viscosity higher than anticipated 2 Decoupling of the magnetic drive 3 Decreased pump performance and reduced flow 1 Corrosion and cracking Wrong pump material selected 2 Rapid corrosion and wearing of bearing 3 Corrosion of the O ring resulting in leakage Inlet pipe not submerged 1 Produce high frequency vibrations and noise sufficiently into the fluid or air 2 Fracturing of the bearing and thrust rings sucked into piping system 3 Reduced pump performance 4 Serious cases can lead to dry running Sie Be 1 Reduced pump performance GARAK AU 2 Serious cases can lead to dry running 14 Incorrect System Calculations or Incorrect Pump Selected Improper Piping or Layout AMXI SERIES ae oe suction resulting in low efficiency installed insufficient flow cavitation or dry running oe roe within pump leaks during shut down period piping resulting in dry running when pump is restarted priming direction voltage 1 Low performance and vibrations caused by l sucked in air GERREK 2 Fracturing of the bearing and thrust rings 3 Dry runnin
13. maintenance will set out in the relevant sections ASSOMA INC does not assume responsibility for personal danger or property damage resulting from failure to follow the safety instructions contained herein A DANGER WARNING d CAUTION The explosion proof grade of AMXI series is varied according to materials used together with type of motor matched Please follow the order specification sheet or contact ASSOMA s local agent Be sure to turn the power off before any wiring or disconnection operations The customer should not modify the pump under any circumstances Doing so could result in an unexpected accident ASSOMA INC shall not be responsible for accidents or damage resulting from equipment modified by the customer Be sure to take special precautions when performing operations if using hazardous explosive or inflammable liquids Magnetic field hazard AMXI rotor including the drive magnet and driven magnet uses strong permanent magnet Pay attention to potential hazards from powerful magnetic fields to persons such as who are assisted by electronic devices The pump operator and pump operation supervisor must not allow any operator who has little or no knowledge of the pump to run the pump Pump operators must have a sound knowledge of the pump and its operation Do not use a damaged pump Doing so could result in injury or fire Keep away from heat or flame Do not place any open flame or flammable object ne
14. nd axial force thus affecting the pump s performance and service life Please use table 5 1 for the recommended minimum flow rate Unit l min Model a ee A Temperature pre ere ere pre O 0 JU Table 5 1 Note The above data is based on water For volatile or viscous fluids consult your local distributor Do not operate the pump with outlet valve shut off more than 1 minute Long time shut off will cause the inside to heat up and damage the pump CAUTION Operating Procedure and Notes 6 1 Notes Prior to Starting the Pump 1 Check the motor s power rating including frequency voltage and wiring 2 Recheck to make sure all the parts flange pump casing base plate etc are securely fastened 10 AMXI SERIES 3 Fill the pump with liquid priming to remove any air within the pump and suction piping 4 Check to ensure the inlet valve is open 5 Using a screwdriver rotate the motor s cooling fan to ensure it is not too tight or stuck 6 2 Starting Up the Pump 1 Check the direction of rotation of the motor by rapidly switching on and off the power 2 Direction of motor rotation can be checked from the fan side It should be clockwise seeing from the fan cover follow arrow direction on the fan cover If the rotating direction reverses change wiring phases by shifting any two wire connections 3 Close the outlet valve and start up the pump 4 Slowly open the outlet valve when the mot
15. or has reached a stable speed Adjust the outlet valve to obtain the desired operating pressure or flow rate 6 3 Operating the Pump 1 Shut down the pump immediately in the case of cavitation or dry running 2 If decoupling should happen shut down the pump to prevent reducing the magnet s strength 3 During power outages shut off the pump s power supply and close the outlet valve 4 When switching on the pump with the outlet valve closed the outlet pressure should increase If the pressure fails to rise or if the pressure is too low shut down the pump and check the piping and wiring NOTE Outlet Pressure Inlet Pressure Pump Pressure Pump Pressure beien Fluid Specific Gravity Pump Head 10 6 4 Shutting Down the Pump 1 Close the outlet valve slowly to prevent damage to the pump due to reverse fluid flow water hammer 2 Shut off the pump It should stop gradually If not check the interior of the pump for problems 3 The pump should be checked periodically If the pump is used in a cold operating environment relative to the fluid s freezing point the fluid may crystallize even if the pump is shut down for a very short amount of time To prevent crystallization a drain plug should be included in the piping system or a heating system could be used to maintain the temperature during shutdown 11 AMXI SERIES 7 Maintenance and Inspection 7 1 Daily Inspection See Table 7 1 Appearance 1
16. r to assembling them 3 Use a hand press to gradually and firmly press the shaft into the shaft support 4 When pressing the shaft bearing into the impeller make sure the cut ledge of the bearing matches the straight edge inside the impeller 5 When fastening the different parts of the pump make sure to fasten the corresponding opposite screws in turn to ensure a uniform tightness 6 After the entire pump is assembled use a small screwdriver to rotate the motor cooling fan to ensure everything is installed correctly 17 AMXI SERIES Annex B Exploded View and Parts List Ne PartName no Part Name No M01 Motor Frontthrustring Jaa o a a azo _ Frontwearring J foo o oa o oa O Impeler derala RG NO O ring According to No AS568 Each type is refer to the sectional drawing 18
17. r visibility environment display a sign near the power supply switch to notify others that someone is WORKING on the pump Power supply mistakenly turned on during maintenance may lead to personal injury When handling a toxic or odorant liquid ventilate the working area well In addition the operator must wear protector gear such as a safety mask safety goggles and protective gloves WARNING 2 No remodeling Remodeling of the pump by the user may result in serious injury electric shock or damage to the pump Do not attempt to remodel as it is very dangerous Magnetic field hazard Be careful not to get your hands or fingers pinched by parts Impeller is encapsulated strong magnet inside While do not let the magnet close to the magnetic sensitive objects such as magnetic cards computer equipment etc Use the right tools for any maintenance or disassembly and assembly Be careful with hazardous liquids If pumping dangerous chemicals be sure to drain and wash well before CAUTION disassembling A small amount of fluid may however remain in the internal parts or pipe fittings 8 Incorrect Usage and Selection Abnormal Condition Possible Effect Damage System resistance too high _ 1 Insufficient or no flow or 2 Pump unable to effectively dissipate heat Pump head too low 3 Excessive wear on bearing and thrust rings Resistance lower than expected 1 Excessive flow or 2 Overloading of the motor Pump head too
18. temperature to rise to a dangerous level that may seriously damage the pump 2 If dry running occurs switch off the pump immediately let it cool for at least an hour before priming the pump to prepare it for normal operation NOTE Do not subject the pump to rapid cooling which may damage the internal parts 8 AMXI SERIES 3 We recommend using a dry run protector to detect dry run occurrences to avoid causing unnecessary damage to the pump 5 2 Operating Temperature 1 Operating temperature may change the fluid s viscosity vapor pressure and corrosiveness Please ensure that your pump is operating within the proper temperature range 2 The optimal temperature range for pumping pure water Body material PPG 0 80 C Body material ETFE CF 0 95 C 3 Please consult the distributor for the temperature range suitable for your chemicals 4 We recommend the operating environmental temperature to be between 0 C 40 C When the pump is used to feed a hot liquid do not touch the front cover or the piping with your bare hands It may cause burns Any reachable hot surfaces including pumps motors and piping must provide isolate device CAUTION and display obvious warning signs for high temperature 5 3 Concentrations Viscosity and Specific Gravity 1 A change in a fluid s concentration will usually affect its viscosity and specific gravity Other physical properties like corrosiveness may also change wit
19. the pump should be trimmed according to frequency applied Apply under inadequate frequency may cause motor overload use under higher frequency or pump under performance use under lower frequency Nameplate information including motor nameplate and pump nameplate plays an important role for the operation and maintenance of the pump It 1s proposed to re copy data on nameplates and store it securely The flow and head on the nameplate is the rated operating point or the operating point made to customer demand Where Head means Total head Total Head Static Head Dynamic Head VY aV 2g the user and ASSOMA INC such as fluid composition fluid temperature The pump is designed and manufactured to the specifications agreed upon by working pressure environmental conditions and necessary operational WARNING information Use the pump strictly in accordance with the pump specifications and application range If the user intends to change any specification contacts ASSOMA INC or the authorized dealer in the near region to obtain the permission in writing before operation Unpack a pump for inspection without proper hoisting or support of lifting equipment may cause serious personal injury or damage to the pump CAUTION AMXI SERIES Installation Piping and Wiring 4 1 Installation Location 1 The pump should be close to the ground and located near the inlet tank 2 There should be sufficient space reserved around
20. the pump to facilitate future maintenance and repairs 3 The pump and its wiring should be placed in a relatively dry environment protected from possible flooding 4 Install in the place where the ambient temperature is not above 40 C 5 Fastening the pump to base plate or machine with anchor bolt Be sure to use the hanger bolt to lift the pump Do not hang with the other position of the pump When hoisting do not pass under a raised pump A serious injury could occur if the pump is accidentally dropped Before lifting check the weight of the pump Do not lift a pump which exceeds the rated weight of the hoist And be sure no one standing below the pump while lifting or transporting Install or store the pump 1n the following places with special care and consult with ASSOMA INC or authorized dealer in the near region a Places where flammable gas dust or material is used or placed CAUTION b Places where corrosive gas is generated Places where the ambient temperature is extremely higher than 40 C or extremely lower than 0 C 4 2 Piping 1 AMXI flange screw is either M16 or 5 8 The tightening torque is 5 N m 2 the allowable load of pipe on the pump Force N Moment N m Model Fx Fy Fz F Mx My Mz M AMIGO d 400 350 350 600 120 150 120 250 AMXI 441 uu 400 350 350 600 120 150 120 250 AMX1 542 543 545 400 350 350 600 150 180 150 300 _
21. y When a problem arises please read this instruction manual and try to troubleshoot the 15 AMXI SERIES problem If the problem cannot be found or if replacement parts are needed please call the distributor and give them the following information 1 The pump model and manufacturing serial number indicated on the nameplate 2 The operating condition 3 The situation under which the pump fails Please refer to the warranty card for details of the warranty terms and conditions 16 AMXI SERIES Annex A Disassembling the AMXI Pump A 1 Preparing for Disassembly 1 The magnets used in our AMXI magnetic drive seal less pumps have very strong magnetic strength Take extra precautions when disassembling the pump to prevent personal injury and damage to electronic and magnetic equipments like diskettes magnetic stripe cards etc 2 For personal safety wear protective gear like corrosive resistant aprons and protective eyeglasses during disassembly to prevent injuries caused by spilled chemicals A 2 Assembly Please follow the reverse procedure for disassembly to assemble the AMXI pump However during assembly please pay attention to the following points 1 To attach the outer magnet to the motor shaft apply some grease to the shaft and using a mallet drive the magnet down the shaft via a thick plastic plate see Fig A 1 2 Check if there is any crack on the surface of the thrust ring and wearing ring prio
22. y support see Fig 4 1 When designing supports consider the effects of temperature changes on the supports to avoid thermal stress Inlet piping and connectors should be installed properly to prevent sucking in alr The piping system should not have upward bumps that may collect air The inlet piping should also have a 0 01 0 02 slope increase towards the pump see Fig 4 2 There should not be any elbows for at least 5 times the pipe diameter from the opening of the pump The elbow closest to the pump opening should be a long radial elbow There should be at least a 1 5 diameter distance between the pipe inlet and the closest tank wall to prevent circulation see Fig 4 4 The submerge depth of the inlet should be at least 0 5m or at least twice the pipe diameter below the liquid surface see Fig 4 4 Inlet Piping There should be a distance of at least I AD between the bottom of the tank and the beginning of the inlet pipe opening see Fig 4 4 If there are two or more inlet piping in the same tank they should be placed at least 3D apart to prevent mutually disrupting each other s flow General Requirements Inlet Piping If suction method is upward suction please install a self priming Self Priming cylinder to prevent dry running due to a leaking foot valve Cylinder The size of the self priming cylinder should have a minimum liquid level of at least 0 5m above the opening of the pump A control
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