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        • +86-21-64911960
        • Call us for Consultation



        • Contact Us

        • Eu-Flo Pump Industries Co Ltd
        • Pump Expert of European Standard
        • Tel: 021-64911960
        • Phone: 13391393652
        • Email: info@cnwaterpumps.com
        • 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

        • http://www.renewhc.com/wp-content/uploads/2019/04/20190401160120B.jpg 

           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

        • http://www.renewhc.com/wp-content/uploads/2019/03/images.jpg

          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.
        • More
        • 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

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

        • March 24,2019

        • http://www.renewhc.com/wp-content/uploads/2019/03/inducer-2B.jpg

          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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