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  • Eu-Flo Pump Industries Co Ltd
  • Pump Expert of European Standard
  • Tel: 021-64911960
  • Phone: 13391393652
  • Email:
  • Address:Room 1506, 638 Heng Feng Road, Su He No.1 Mansion,200040.Shanghai,China
  • Pump performance testing

  • April 19,2019

  •  Pump performance test processing

    Pump performance test of pump manufacturers in china

    Pump performance test of pump supplier in china

    1. Check the order information, confirm the capacity, head, efficiency, and power of the pump be tested, and confirm the diameter of the pump flanges;
    2. according to the diameter of the pump flange, tested pump power, select the appropriate test pipeline and test motor;
    3. connect the test pipeline, test motor, power supply and instrumentation sensors;
    4. measuring the ambient atmospheric pressure, water temperature, inlet surface distance;
    5. Input the capacity, head, efficiency requirements, gauge distance, atmospheric pressure and water temperature of the tested pump into the test software;
    6. Vacuum is drawn to fill the pump chamber and the suction line with water;
    7. Jog the water pump to confirm the correct rotation direction ;
    8. start the pump;
    9. Excluding the gas in the pressure sensor pipeline;
    10. Take the point test according to the pump capacity (record the vibration and noise of the pump at the rated point. If you need to confirm the pump bearing temperature rise up, you need to run the pump for 70 minutes , then testing temperature rise up and record it)
    11. Form a pump performance test report and print the test report;
    12. Determine the test results according to the order requirements;
    13. If the judgment is passed, go to the next process;
    14. If the judgment is unqualified, return it to production for improvement, and repeat the above steps after improvement.

    pump manufacturers in china|eu-flo pump

    pump supplier in china|eu-flo pump

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  • Water Lubrication Bearing

  • April 15,2019

  • Water Lubrication Bearing
    Water Lubrication Bearing


    JDB  Seria Water Lubrication Bearing Size

    JDB Water Lubrication Bearing


    10141014101408101410101412101415 101420        
    18 121810121812121815121816121820121825121830      
     131910 131915131916         
    14201420 142010142012142015 142020142025142030      
    15211521 152110152112152115152116152120152125152130      
    16221622 162210162212162215162216162220162225162230162235162240    
    18241824  182412182415182416182420182425182430182435182440    
    28 202810202812202815202816202820202825202830202835202840202850   
      223212223215 223220223225       
    25332533  253312253315253316253320253325253330253335253340253350253360  
    30383038  303812303815 303820303825303830303835303840303850303860  
    45     354520354525354530354535354540354550354560  
    40504050     405020405025405030405035405040405050405060405070405080
    50605060       506030506035506040506050506060506070506080


    50655065206530 5065405065505065605065705065805065100    
    70  557040557050557060557070      
    63756375    637560637570637580     
    65806580   658050658060658070658080     
    70907090   709050709060709070709080     
    75907590    7590607590707590807590100    
    75957595    7595607595707595807595100    
    80968096  80964080965080966080967080968080961008096120   
    100  801004080100508010060801007080100808010010080100120 80100140 
    9011090110   90110509011060901107090110809011010090110120  ,,


    100120100120    100120601001207010012080100120100100120120 100120140 
    120140120140      12014080120140100120140120 120140140 
    145       125145100125145120   
    130150130150       130150100 130150130  
    140160140160       140160100  140160140 
    150170150170       150170100   150160140
    160180160180       160180100   160180150


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  • Normal Unit Conversion Table

  • April 14,2019

  • centrifugal pump normaly unit and conversion table

    The unit conversion table is on tooling of flowing media.

    1.Volume & flowrate conversion table

    Volume & flowrate unitL/sL/minm3/hm3/minm3/sgal(UK)/mingal(US)/minft3/hft3/minft3/s
         remarkL/sL/minM3/h M3/M  M3/SUK GPMUS GPMCFHCFMCFS


    2.Pressure unit conversion table

    Pressure UnitMpabarkgf/cm2atmmmH2OmmHglbf/in2(psi)1 kgf/cm2




    1 mmHg





    remarkMpaBarKg force /cm2Standard atmospheric pressureMillimeter water columnMillimetre mercuryPound force /inch2


    3.Power unit conversion table

    Power unitkWkgf·m/sPSHP1W=1J/s=1N·m/s  1kcal/h=1.163W  1kW=859.845kcal/h
    1 kW1101.9721.359621.341021Btu/h=0.29307W  1W=3.412 Btu/h   1HP=550ft·lbf/s
    1 kgf·m/s9.8067×10-311/75=0.013330.013151W=1J/S=1N·m/S   1K cal/h=1.163瓦
    1 PS0.73557510.986321Kw=859.845K cal/h     1 Btu/h=0.29307瓦
    1 HP0.745776.0401.013911W=3.412 Btu/h    1 hp=550ft.lbf·/s
    RemarkKwKg force·.m/SMetric HPImperial HP1 RT=3024 K cal/h=3.5169 Kw


    4.Force Unit conversion table

    Force UnNkgflbfkNtf1kgf=1kp(kilopond)


    =105 Dyne

    RemarkNKg ForcePound ForceKNTon Force






    5.Torque Unit conversion table

    1 N·m10.101972
    1 kgf·m9.806651
    RemarkN·mKg force·m






    6.Temperature Unit conversion table

    Temperature unitt(℉)=[t(℃)×9/5]+32 

    t(℃)=[ t(℉)-32] ×5/9

    T(K)=273.16+ t(℃)

    Delta T:△t(℉)= △t(℃) ×9/5

    △t(℃)= △t(℉) ×5/9



    K- Kelvin (thermodynamic temperature unit)

    T- Thermodynamic temperature (absolute temperature)














    7.Speed Unit Conversion table

    Speed unitm/sm/minft/minft/s
    1 m/s160196.853.281
    1 m/min0.016713.2810.0547
    1 ft/min0.00510.304810.0167
    1 ft/s0.304818.288601
















    8.Volume unit conversion table

    Volume unitm3cm3dm3=Lin3ft3yd3fl.oz.(UK)fl.oz.(US)gal(UK)gal(US)
    1 m311×1061×10361023.735.314671.3079535.195×10333.184×103219.969264.172
    1 cm31×10-610.0010.0610235.31×10-61.31×10-60.03520.033810.000220.00026
    1 dm31×10-31000161.02370.035310.0013135.195233.81380.219970.26417
    1 in316.3871×10-616.38710.0163910.0005821.43×10-60.576750.554110.00380.00433
    1 ft328.3168×10-328316.828.3168172810.03704996.614957.4996.228837.48052
    1 yd30.76455764555764.5554665627126908.525852.4168.178201.972
    1 fl.oz.(UK)28.413×10-628.4130.02841.733880.0010.000410.960750.006250.00751
    1 fl.oz.(US)29.5735×10-629.57350.02961.80470.001040.000041.0408510.006510.00781
    1 gal(UK)4.5461×10-34546.094.54609277.420.160540.00595160153.72111.20095
    1 gal(US)3.7854×10-33785.413.785312310.133680.00495133.2331280.832671
    remarkm3cm3Decimeter 3=Litreinch3foot3yd3UK ounce (liquid)US ounce (liquid)Uk GallonUS Gallon


    9.Area unit conversion table

    Area unitcm2m2km2in2ft2yd2
    1 cm210.00010.1×10-90.1550.001080.00012
    1 m21000011×10-6155010.76391.19599
    1 km210×1091×10611.55×10910.7639×1061.196×106
    1 in26.45160.645×10-30.645×10-910.006940.00077
    1 ft2929.030.092992.9×10-914410.11111
    1 yd28361.270.836130.836×10-6129691
    remarkcm2m2km2inch2foot2 yd2


    10.Mass unit conversion table

    Mass unitgkgtozlbUS tonUK ton
    1 US ton907185907.1850.9071932000200010.89286
    1 UK ton1.016×1061016.051.016053584022401.121
    remarkgKgTonounce (uk ounce)poundMetric T(short T)Uk T(
    Long ton)


    11.Length unit conversion table

    Length UnitmmcmmKminftyd


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  • Pneumatic Submersible Pump

  • April 5,2019


     EBB3-36 Pneumatic operation Submersible pump

       The pneumatic Submersible pump for Marine       

     EBB3-36 type pneumatic pump is a kind of explosion-proof air operation Submersible pump, EBB3-36 type pneumatic pump is widely used, safe and reliable, can work continuously, EBB3-36 type pump is pneumatic operation pump

    EBB3-36 type pneumatic pump is a mechanized tool with compressed air as power medium, which has the characteristics of small volume, high efficiency, safe and reliable, and continuous operation.

    EBB3-36 Pneumatic operation submersible pump is widely used in shipbuilding, coal mines, construction, power stations, chemicals and other industries of sewage, water drainage and irrigation, but also flammable, explosive and other bad work of the only ideal tool

    DATA OF EBB3-36 Pneumatic Operation Submersible Pump 

    Head: ≥20m

    Flowrate: ≥335min

    no-load speed: 6000rpm

    load gas consumption: 50L/S

    Air Pipe Inner Diameter: 13mm

    outlet thread: G11/2in

    Pump Height: 500mm

    Pump Weight: 17kg



    Capacityunloading(r/mi n) 


    Air Pipe Dia(m m)Thread (i n) 


    Head(m)Capacity (l/


    Pneumatic Submersible Pump
    Pneumatic Submersible Pump
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  • Centrifugal pump use Visual automatic oiler

  • March 28,2019


    Centrifugal pump use of Visual automatic oiler
    Centrifugal pump use of Visual automatic oiler

    Centrifugal pump use Visual automatic oiler

    Centrifugal water pump use Visual automatic oiler


    Visual automatic oiler instructions

    The 1741-V visual automatic oiler is designed for long-term stable lubrication and oil supply.

    The visual auto-oiler consists of a medium-duty spring (green), a light-duty spring (orange) and a heavy-duty spring (black). When used, the correct spring is selected according to the lubricant. #0-#3 grease can be used.


    All models of lubricant oilers (both manual and electric) have a standard lubricant coupling for grease to the oil cup and embedded fuses to prevent overfilling or cup pressure Too high.



    Interface thread 1/8 NPTF

    Interface (butter): standard

    Capacity: 2.2 cubic inches, about 3300ml

    Maximum pressure relief: 15PSI (about 1kg)

    Lubricating oil pressure: see table below


    Spring full cup empty cup 1. Screw the thread interface into the bearing to lubricate

    337421-1 Orange 0.23kg 0.147kg Note: With a hex wrench, do not tighten the oil cup with your hand.

    337421-2 Green 0.307kg 0.193kg Damaged

    337421-3 Black 0.387kg 0.240kg 2. Use grease coupling to add grease

    1. Add grease to the following

    Safe use specifications a. Side view if the plunger line to the lid angle is found.

    1. Please add oil to the oil cup according to the installation and operation instructions. Do not overfill b. Look down and find the indication point on the plunger to reach the red line of the cup cover.
    2. Carefully remove the lid and the lid is spring loaded.

    Note: Once the oil cup is too full, too much lubricating fluid will flow out of the oiler’s lid and relieve pressure. All normal operations will be carried out.

    Replace the spring:

    Choose the right spring according to the grease.


    Press and open the lid, then rotate the lid counterclockwise and release the pressure.

    Note: The lid of the cup is equipped with a spring. It cannot be removed quickly and needs to be carefully removed.

    1. Remove the spring from the cup.
    2. Install the new spring into the cup

    Note: Make sure the spring is installed in place on the cup and plunger

    1. Press and install the lid onto the oil cup and turn it clockwise until the pressure is right.




    1 Remove the oiler from the bearing housing

    1. Open the lid as above
    2. Remove the spring from the cup
    3. Insert the stick into the center hexagon and push the plunger out of the cup.
    4. Gently clean the parts with a clean, soft cloth.
    5. When reinstalling, apply a layer of film on the oil cup and plunger with grease to lubricate.
    6. Press the lid under the hand and rotate it clockwise to the proper pressure.
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  • Pump Common Faults and Troubleshooting Methods

  • March 27,2019

  • Split Case Pump Faults
    SPlit Case Pump Eu-Flo

    Pump Common Faults and Troubleshooting Methods

    capacity no enough or no out water

    1:motor reverse

    2:flow channel been clogging

    3:density of medium is too high

    4:required head too high or the pump head selection smaller than actual required head

    5:impeller been wear

    6:water lever is too lower and been suction air

    7:check valve installation reverse   (way adopt to trouble shooting:)

    1:correction motor rotation

    2:clear the Debris, set a Filter Grille near by the pump suction

    3:Diluted the flow medium with water

    4:try to lower required head( for example to change big diameter pipe and smoother pipe, reduce the elbow qty, or increase elbow Arc radius, or change into higher head pump)

    5:change pump impeller

    6:adjustment Floating ball Switch position, Make the lowest level meet the requirements of the mounting dimension diagram

    7:Correct check valve direction

    2.Cannot start

    1.Phase deficiency

    2.Impeller jammed

    1. Winding connectors or cable breakers

    4:Stator winding Burnout

    5:controlling electrical faults

    way adopt to trouble shooting

    1、check the line, eliminate the problem of missing phase

    2、remove debris, it is best to set the filter around the pump (but not in the pump inlet installation filter)

    3、Repair after checking with ohm meter

    4、Repair after checking with ohm meter

    5、repair, replacement winding or stator

    6、Stator Burnout     (reason maybe caused:)

    1、the lack of phase

    2、Impeller jammed

    3、winding joint or cable circuit breaker

    4、Stator winding burnout

    5、Control electrical fault     (way adopt to trouble shooting:)

    1、configuration protection Control electrical appliances and: Find out the line, clear the fault; remove the dirt, tighten the impeller fastening screws and stainless steel spring washer; dilute the medium with water; rinse and dredge the cooling system

    2、Replace the mechanical seal or “O” seal ring

    3、Tighten the fasteners of each part

    1. Too large current (reason maybe caused:)

    1、Pipes and impellers are blocked

    2、pumping liquid density or viscosity is high

    3、the selected pump head greatly exceeded the actual needs, or the use of changing conditions, the device head greatly reduced, so that the pump over the recommended flow operation (way adopt to trouble shooting:)

    1、Clean up the blockage in the pipe and impeller

    2、Change the density or viscosity of the pumping liquid

    3、off the small outlet valve, reduce the flow, or trim smaller impeller, or replace the lower head pump

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  • pump inducer function-multi-stage pump inducer function-centrifugal pump inducer function

  • March 24,2019


    centrifugal pump inducer function
    centrifugal pump inducer function


    pump inducer function , multi-stage pump inducer function, centrifugal pump inducer function

       The inducer is installed in front of the first stage impeller of the centrifugal pump. It is called the front inducer. When the liquid flows through the inducer, it works on the liquid to increase the energy. It is equivalent to adding work energy to the liquid entering the rear impeller, which is equivalent to The liquid entering the rear impeller is pressurized to increase the suction of the pump.


    The centrifugal pump inducer is an axial flow impeller with a low blade load (only a few meters lift), a small blade installation angle, a small number of blades, and a dense cascade of cascades. It has high inhalation performance. The lift generated by the inducer acts to pressurize the centrifugal impeller behind, and the suction performance of the multistage centrifugal pump is improved, so that the suction speed of the centrifugal pump can reach about 3000. At present, the design method of the inducer is an empirical design method based on the test. There are usually two design methods: one is a flat cylindrical inducer design, and the other is a curved-leaf tapered inducer .

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