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Selection Precautions of the Sump Pump
February 1,2021
The Selection Precautions of the Sump Pump
The selection basis of the sump pump shall be considered in terms of the process flow, water supply and drainage requirements, and from the five aspects of liquid conveying capacity, plant lift, liquid property, pipeline layout and operation condition. The flow of the selection is one of the important performance data of the pump. It relates directly to the whole device.
Selection basis of the sump pump:
1. According to the medium, the type of the pump can be preliminarily determined! For example the slurry pump or water pump! Choose the suitable material according to the medium.
2. The depth and operating conditions of the pool, determining the length and structure of the liquid. For example, the bottom pump of the pool is properly added straw!
3. Determine the pipeline diameter according to the flow rate, and determine the lift according to distance and height!
4. Finally, the motor power.
The selection of the pumps should pay attention to the following aspects: the selection basis of the sump pump shall be considered in terms of the process flow, water supply and drainage requirements, and from the five aspects of liquid conveying capacity, plant lift, liquid property, pipeline layout and operation condition.
1. The flow is one of the important performance data of the sump pump, it is directly related to the production capacity and transmission capacity of the entire device. When selecting the pump, the maximum flow rate is based on the normal flow rate, and the maximum flow rate can be 1.1 times as the maximum flow rate when there is no maximum flow.
2. The required lift of the installation system is another important performance data of the pump. Generally, it should be used to select the type of the pump with a yield of 5% to 10%.
3. The piping arrangement condition of the pump system refers to the direction of the liquid delivery distance between the delivery fluid and the liquid, so as to carry out the calculation of the system head and the check of the residual amount of cavitation.
4. Properties of liquids, including the names of liquid media, physical properties, chemical properties and other properties, the physical properties have temperature c density d, viscosity u, solid particle diameter and gas content in the medium, etc., which involves the lift of the system; Chemical property mainly refers to the chemical corrosion and toxicity of liquid medium, which is an important basis for selecting the pump material and choosing the type of axial seal.
5. There are many operating conditions of the pump, such as the operation of liquid, T saturation steam power P, suction side pressure PS (absolute), discharge side pressure PZ, altitude, the ambient temperature operation is the gap or continuous, the pump position is fixed or movable.
The selection of sump pump
1. The tight-type sump pump
The tight – type pump is usually used for low – pressure straight pipe, and the sealing performance depends entirely on the fit between the plug. The compaction of its sealing surface is achieved by tightening the nut on the lower part. Generally, PN is less than 0.6 mpa.
2. Packing type sump pump
The sealing between the plug and the stopper is achieved by compacting the packing. The sealing property is good because of the packing. Normally, the pump has a packing gland. The stopper does not need to reach out of the valve body, thus reducing the leakage path of a working medium. The submerge pump for the large number of PN is less than 1 Mpa of pressure.
3. The Self-sealing sump pump
The self-sealing of the sump pump realizes the sealing between the stopper and the plug body through the pressure of the medium itself. The small head of the plug protrudes upwards, and the medium through the hole in the inlet enters the plug. The plug is pressed up, and the structure is generally used in the air medium.
4. Oil sealed liquid pump
In recent years, the application scope of the pump has been expanding, and the oil – sealing pump with forced lubrication has been developed. A layer of oil film is formed between the sealing surface of the plug and the stopper due to the forced lubrication. The sealing performance is better, with the ability to open and close, and prevent the sealing surface from being damaged.
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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
- Check the order information, confirm the capacity, head, efficiency, and power of the pump be tested, and confirm the diameter of the pump flanges;
- according to the diameter of the pump flange, tested pump power, select the appropriate test pipeline and test motor;
- connect the test pipeline, test motor, power supply and instrumentation sensors;
- measuring the ambient atmospheric pressure, water temperature, inlet surface distance;
- Input the capacity, head, efficiency requirements, gauge distance, atmospheric pressure and water temperature of the tested pump into the test software;
- Vacuum is drawn to fill the pump chamber and the suction line with water;
- Jog the water pump to confirm the correct rotation direction ;
- start the pump;
- Excluding the gas in the pressure sensor pipeline;
- 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)
- Form a pump performance test report and print the test report;
- Determine the test results according to the order requirements;
- If the judgment is passed, go to the next process;
- If the judgment is unqualified, return it to production for improvement, and repeat the above steps after improvement.
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Pump Burning Sliding Bearing’ Reason
April 17,2019
What can cause of the water pump burning Sliding bearing of pump manufacturers in china?
What can cause of the water pump to burn the Sliding bearing of pump suppliers in china?
1 lubricating oil pressure is too low, the oil supply is insufficient;
2 The lubricating oil circuit is blocked, resulting in dry grinding of the bearing bush;
7 motor vibration, excessive gap;
4 lubricating oil is not good quality, water or impurities are too much, the lubrication effect is not good
Treatment method: stop the pump, contact the mechanical repair factory for repair
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 JDB Seria Water Lubrication Bearing Size
JDB Water Lubrication Bearing d D IDF7 ODm6 L-0.10
-0.308 10 12 15 16 20 25 30 35 40 50 60 70 80 8 12 8 +0.028
+0.01312 +0.018
+0.007081208 081210 081212 081215 10 14 10 14 101408 101410 101412 101415 101420 12 18 12 +0.034
+0.00818 121810 121812 121815 121816 121820 121825 121830 13 19 13 19 +0.021
+0.008131910 131915 131916 14 20 14 20 142010 142012 142015 142020 142025 142030 15 21 15 21 152110 152112 152115 152116 152120 152125 152130 16 22 16 22 162210 162212 162215 162216 162220 162225 162230 162235 162240 18 24 18 24 182412 182415 182416 182420 182425 182430 182435 182440 20 28 20 +0.041
+0.02028 202810 202812 202815 202816 202820 202825 202830 202835 202840 202850 22 32 22 32 +0.025
+0.009223212 223215 223220 223225 25 33 25 33 253312 253315 253316 253320 253325 253330 253335 253340 253350 253360 30 38 30 38 303812 303815 303820 303825 303830 303835 303840 303850 303860 35 45 35 +0.050
+0.02545 354520 354525 354530 354535 354540 354550 354560 40 50 40 50 405020 405025 405030 405035 405040 405050 405060 405070 405080 45 55 45 55 +0.030
+0.011455530 455535 455540 455550 455560 50 60 50 60 506030 506035 506040 506050 506060 506070 506080 d D IDF7 ODm6 L-0.10
-0.3030 35 40 50 60 70 80 100 120 130 140 150 50 62 50 +0.050
+0.02562 +0.030
+0.011506230 506235 506240 506250 506260 506270 50 65 50 65 206530 506540 506550 506560 506570 506580 5065100 55 70 55 +0.060
+0.03070 557040 557050 557060 557070 60 74 60 74 607430 607435 607440 607450 607460 607470 607480 60 75 60 75 607530 607535 607540 607550 607560 607570 607580 6075100 63 75 63 75 637560 637570 637580 65 80 65 80 658050 658060 658070 658080 70 85 70 85 +0.035
+0.013708535 708540 708550 708560 708570 708580 7085100 70 90 70 90 709050 709060 709070 709080 75 90 75 90 759060 759070 759080 7590100 75 95 75 95 759560 759570 759580 7595100 80 96 80 96 809640 809650 809660 809670 809680 8096100 8096120 80 100 80 +0.071
+0.036100 8010040 8010050 8010060 8010070 8010080 80100100 80100120 80100140 90 110 90 110 9011050 9011060 9011070 9011080 90110100 90110120 ,, 100 120 100 120 10012060 10012070 10012080 100120100 100120120 100120140 110 130 110 130 +0.040
+0.01511013080 110130100 110130120 120 140 120 140 12014080 120140100 120140120 120140140 125 145 125 +0.083
+0.043145 125145100 125145120 130 150 130 150 130150100 130150130 140 160 140 160 140160100 140160140 150 170 150 170 150170100 150160140 160 180 160 180 160180100 160180150 - More
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 unit L/s L/min m3/h m3/min m3/s gal(UK)/min gal(US)/min ft3/h ft3/min ft3/s 1L/s 1 60 3.6 0.06 0.001 13.1982 15.8502 127.134 2.1189 0.03531 1L/min 0.01667 1 0.06 0.001 16.6667×10-6 0.21997 0.26417 2.11888 0.03531 0.00059 1m3/h 0.27778 16.66667 1 0.01667 0.27778×10-3 3.66615 4.40287 35.31467 0.58858 0.00981 1m3/min 16.66667 1000 60 1 0.01667 219.969 264.172 2118.88 35.31467 0.58858 1m3/s 1000 60×103 3600 60 1 13198.14 15850.32 127132.8 2118.88 35.31467 1gal(UK)/min 0.07577 4.5461 0.27277 4.5461×10-3 75.7683×10-6 1 1.20095 9.6324 0.16054 2.67567×10-3 1gal(US)/min 0.06309 3.7854 0.22712 3.7854×10-3 63.09×10-6 0.83267 1 8.0208 0.13368 2.228×10-3 1ft3/h 0.00787 0.472 0.02832 0.00047 7.83×10-6 0.1038 0.12467 1 0.01667 0.27783×10-3 1ft3/min 0.47195 28.3168 1.69901 0.02832 0.47195×10-3 6.22883 7.48052 60 1 0.01667 1ft3/s 28.317 1699.02 101.9412 1.69902 28.317×10-3 373.698 448.8312 3600 60 1 remark L/s L/min M3/h M3/M M3/S UK GPM US GPM CFH CFM CFS 2．Pressure unit conversion table
Pressure Unit Mpa bar kgf/cm2 atm mmH2O mmHg lbf/in2(psi) 1 kgf/cm2 =1kP/cm2
=1at
1 mmHg
=1Torr
1Pa=1N/m2
1Mpa 1 10 10.1972 9.8692 101.91×103 7.5006×103 145.04 1bar 0.1 1 1.01972 0.98692 10.197×103 750.06 14.504 1kgf/cm2 0.098067 0.98067 1 0.96784 10×103 735.56 14.223 1atm 0.10133 1.0133 1.0332 1 10332 760 14.696 1mmHxO 9.8067×10-6 98.067×10-6 0.1×10-3 96.784×10-6 1 73.556×10-3 1.4223×10-3 1mmHg 0.13332×10-3 1.3332×10-3 1.3595×10-3 1/760 13.595 1 19.337×10-3 1lbf/in2(psi) 6.8948×10-3 68.948×10-3 70.307×10-3 68.046×10-3 703.07 51.715 1 remark Mpa Bar Kg force /cm2 Standard atmospheric pressure Millimeter water column Millimetre mercury Pound force /inch2 3．Power unit conversion table
Power unit kW kgf·m/s PS HP 1W=1J/s=1N·m/s 1kcal/h=1.163W 1kW=859.845kcal/h 1 kW 1 101.972 1.35962 1.34102 1Btu/h=0.29307W 1W=3.412 Btu/h 1HP=550ft·lbf/s 1 kgf·m/s 9.8067×10-3 1 1/75=0.01333 0.01315 1W=1J/S=1N·m/S 1K cal/h=1.163瓦 1 PS 0.7355 75 1 0.98632 1Kw=859.845K cal/h 1 Btu/h=0.29307瓦 1 HP 0.7457 76.040 1.0139 1 1W=3.412 Btu/h 1 hp=550ft.lbf·/s Remark Kw Kg force·.m/S Metric HP Imperial HP 1 RT=3024 K cal/h=3.5169 Kw 4．Force Unit conversion table
Force Un N kgf lbf kN tf 1kgf=1kp(kilopond) 1N=105Dyn(dyn)
=105 Dyne
1N 1 0.1019716 0.224809 1×10-3 0.102×10-3 1kgf 9.80665 1 2.20462 0.0098 1×10-3 1lbf 4.44822 0.453592 1 0.00445 0.454×10-3 1kN 1000 101.9716 224.809 1 0.10197 1tf 9806.65 1000 2204.62 9.80665 1 Remark N Kg Force Pound Force KN Ton Force 5．Torque Unit conversion table
Torque N·m kgf·m 1 N·m 1 0.101972 1 kgf·m 9.80665 1 Remark N·m Kg force·m 6．Temperature Unit conversion table
Temperature unit t(℉)=[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 unit m/s m/min ft/min ft/s 1 m/s 1 60 196.85 3.281 1 m/min 0.0167 1 3.281 0.0547 1 ft/min 0.0051 0.3048 1 0.0167 1 ft/s 0.3048 18.288 60 1 remark m/s m/Min foot/Min inch/S 8．Volume unit conversion table
Volume unit m3 cm3 dm3=L in3 ft3 yd3 fl.oz.(UK) fl.oz.(US) gal(UK) gal(US) 1 m3 1 1×106 1×103 61023.7 35.31467 1.30795 35.195×103 33.184×103 219.969 264.172 1 cm3 1×10-6 1 0.001 0.06102 35.31×10-6 1.31×10-6 0.0352 0.03381 0.00022 0.00026 1 dm3 1×10-3 1000 1 61.0237 0.03531 0.00131 35.1952 33.8138 0.21997 0.26417 1 in3 16.3871×10-6 16.3871 0.01639 1 0.00058 21.43×10-6 0.57675 0.55411 0.0038 0.00433 1 ft3 28.3168×10-3 28316.8 28.3168 1728 1 0.03704 996.614 957.499 6.22883 7.48052 1 yd3 0.76455 764555 764.555 46656 27 1 26908.5 25852.4 168.178 201.972 1 fl.oz.(UK) 28.413×10-6 28.413 0.0284 1.73388 0.001 0.0004 1 0.96075 0.00625 0.00751 1 fl.oz.(US) 29.5735×10-6 29.5735 0.0296 1.8047 0.00104 0.00004 1.04085 1 0.00651 0.00781 1 gal(UK) 4.5461×10-3 4546.09 4.54609 277.42 0.16054 0.00595 160 153.721 1 1.20095 1 gal(US) 3.7854×10-3 3785.41 3.78531 231 0.13368 0.00495 133.233 128 0.83267 1 remark m3 cm3 Decimeter 3=Litre inch3 foot3 yd3 UK ounce (liquid) US ounce (liquid) Uk Gallon US Gallon 9．Area unit conversion table
Area unit cm2 m2 km2 in2 ft2 yd2 1 cm2 1 0.0001 0.1×10-9 0.155 0.00108 0.00012 1 m2 10000 1 1×10-6 1550 10.7639 1.19599 1 km2 10×109 1×106 1 1.55×109 10.7639×106 1.196×106 1 in2 6.4516 0.645×10-3 0.645×10-9 1 0.00694 0.00077 1 ft2 929.03 0.0929 92.9×10-9 144 1 0.11111 1 yd2 8361.27 0.83613 0.836×10-6 1296 9 1 remark cm2 m2 km2 inch2 foot2 yd2 10．Mass unit conversion table
Mass unit g kg t oz lb US ton UK ton 1g 1 0.001 1×10-6 0.03527 0.0022 1.102×10-6 0.984×10-6 1kg 1000 1 0.001 35.274 2.20462 0.0011 0.00098 1t 1×106 1000 1 35274 2204.62 1.10231 0.9842 1oz 28.3495 0.02835 28.35×10-6 1 0.0625 31.25×10-6 0.00003 1lb 453.592 0.45359 0.00045 16 1 0.0005 0.00045 1 US ton 907185 907.185 0.90719 32000 2000 1 0.89286 1 UK ton 1.016×106 1016.05 1.01605 35840 2240 1.12 1 remark g Kg Ton ounce (uk ounce) pound Metric T(short T) Uk T(
Long ton)11．Length unit conversion table
Length Unit mm cm m Km in ft yd 1mm 1 0.1 0.001 1×10-6 0.03937 0.00328 0.00109 1cm 10 1 0.01 10×10-6 0.3937 0.03281 0.01094 1m 1000 100 1 0.001 39.37 3.28084 1.09361 1km 1×106 100×103 1000 1 39370 3280.84 1093.61 1in 25.4 2.54 0.0254 25.4×10-6 1 0.08333 0.0277778 1ft 304.8 30.48 0.3048 304.8×10-6 12 1 0.33333 1yd 914.4 91.44 0.9144 914.4×10-6 36 3 1 Remark Millimeter cm m KM inch foot yd - More
Pneumatic Submersible Pump
April 5,2019
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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
型号
Capacity unloading(r/mi n) Consumption(l/s)
Air Pipe Dia(m m) Thread (i n) Heigh(mm)
Weight(kg) Head(m) Capacity (l/ min)
EBB3-36A >=20 >=335 6000 50 13 G11/2 500 17 EBB3-36D >=20 >=335 6000 45 13 G11/2 380 12 
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Centrifugal pump use Visual automatic oiler
March 28,2019
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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.
Description
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
- Add grease to the following
Safe use specifications a. Side view if the plunger line to the lid angle is found.
- 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.
- 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.
- Remove the spring from the cup.
- Install the new spring into the cup
Note: Make sure the spring is installed in place on the cup and plunger
- Press and install the lid onto the oil cup and turn it clockwise until the pressure is right.
maintenance
Cleaning:
1 Remove the oiler from the bearing housing
- Open the lid as above
- Remove the spring from the cup
- Insert the stick into the center hexagon and push the plunger out of the cup.
- Gently clean the parts with a clean, soft cloth.
- When reinstalling, apply a layer of film on the oil cup and plunger with grease to lubricate.
- 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 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
- 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
- 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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