Two extreme ends of sewage pump performance parameters

Sewage pump is named after its function. In fact, rubber lining slurry pump can be used pretty well as a horizontal sewage pump. In dealing with industrial sewage, rubber lining slurry pump is widely used as this sewage has acid or alkali materials. Rubber lining pump has rubber sheath and metal impellers. It not only achieves high pressure and high efficiency as metal pump does, but also resist corrosion very well with the help of its rubber, which is proved in the practical experience of Weihu Pump’s cases. When dealing with city sewage, a filter screen is generally added in front of the sewage treatment pool to hold back the fibers or other winding materials ahead of pump inlet, prevent it from entering pump chamber, so that the pump can work better for a longer time.

Two extreme ends of sewage pump:

1. Flow quantity range: generally Q=0.2~10000m3/h. But now it is on a trend to go to two extremes. The max flow of submersible sewage pump produced by ABS Pump Company in Switzerland is 25000m3/h, while the minimum flow of submersible sewage pump produced by Spain pomper, Elie Company is 0.02m3/h.

2. Head: generally h=10~100m, but it obviously tends to develop toward two extreme ends. The max head of submersible sewage pump from American paco is 150m, while American disc company h=400m. But the minimum head of submersible sewage pump from Japanese EIM electric machinery company is 1m.

3. Motor power: motor power of submersible sewage pump is generally 1~600kw. The minimum power of some pumps from Spain Company is 0.08KW, while Switzerland ABS Company has pumps whose motor power can be as large as 900KW. 

4. Max size of solid materials that can pass through: generally, the max diameter of solid object that is allowed to pass through a submersible sewage pump is 50~150mm. Germany water Pump Company has produced submersible sewage pump that allows solid objects as large as 35mm in diameter to pass through. American Disc Company’s submersible pump allows solid objects as large as 460mm in diameter to pass through. 

Shanghai Weihu sewage pump manufacturers has 30 years of experience in producing water pumps. We adopts imported hydraulic mode, high grade precise digital control production equipment, which highly improves the reliability of our pumps.

How to save electricity in using submersible pump?

Tips for saving electricity in using submersible pump:

1.       Make the pipe line as short as possible. Longer pipe line generates larger resistance force, and consumes more electricity.

2.       Do not put the outlet of the pipe too high, ejecting water like shooting out bullets, which will add to consumption. Meanwhile, let the outlet of the water pump face the water pool directly.

3.       Make the diameter of the outlet pipe as large as possible to reduce resistance in the pipe.

4.       Clean up the clogging materials inside the pipe in time. If any foreign stuff is left in water inlet pipe, impellers, the flow channel of flow guide case, the water amount yielded by the pump will be reduced.

5.       Use coupling device for transmission directly as long as possible, because it is more efficient than belt transmission.

6.       Filter screen can be taken off provided the water entering the pump is clean.

7.       Carefully check each sealing on the submersible water pump to prevent air from coming into the pump. Otherwise, the discharge quantity will be reduced sharply.

8.       If the submersible pump is drove by electric motor, you should not use a diesel motor or gasoline motor instead. If three-phase asynchronous motor is available, single-phase asynchronous motor shall be replaced.

Shanghai Weihu Submersible pump manufacturers has been dedicated to the production and export of submersible water pumps for over 3 years. Our pumps can be made from stainless steel or carbon steel, as the client wishes. We provide QJ series deep well submersible pump, QS small submersible motor-pump, as well as much knowledge about water pump maintenance, principle, operation methods, development history, etc. If you have any question about water pump, please feel free to contact us. We are willing to be helpful.

Fountain pump features and application range

Fountain pump features and application range. Introduction to stainless steel fountain pump performance characteristics and application scope Weather gradually cool, fountain should have gradually fade out the line of sight, but in the hot summer, fountain but people love summer artifact, as everybody knows, fountain is formed by fountain equipment such as pump, today Weihu Submersible pump manufacturers will talk about stainless steel fountain pump performance characteristics and application scope, let you fully understand.

1. The parameters:

Stainless steel fountain pump flow rate (Q) : biggest 750 mh

Head (H) : biggest 510 m

Power (P) : the biggest 400 kw

2. The performance characteristics:

(1) low noise, no pollution, high efficiency;

(2) small size, space saving, support level installation;

(3) material optional range is extensive;

(4) concentration 350 grams per cubic meters or less

3. The scope of application: Stainless steel fountain pump main applications include landscape fountain, water fountain, high sediment concentration water fountains, spray, waterscape garden water features, playground.

4. The choice of high pressure and low pressure High pressure fountain pump cost is relatively low, need not form a complete set of power transformer. Safety is cheaper but not as good as low voltage fountain pump. High-pressure fountain pump, now in general use in our market by low fountain pump part in high-grade occasions.

Fountain pump principle and scope of application

Fountain pump as one of important equipment in the fountain system, its working principle received the concern of the industry, Weihu Submersible pump manufacturers today to tell you a fountain pump principle and the applicable scope of the equipment.

Fountain pump principle:

1. Open the pump before, must be filled with liquid in the suction pipe and pump. After

2. Open the pump, high-speed rotating impeller, the liquid with the blades rotate together, in under the action of centrifugal force, fly away from the impeller to injection, injection of the liquid in the pump shell gradually spread of indoor speed slow, pressure increase gradually, and then from the pump discharge, the discharge pipe flow.

3. Place in the center of the blade due to liquid was dumped into the surrounding formation is no air and no liquid vacuum low pressure area, fluid in the pool liquid under the action of atmospheric pressure on surface of the pool, the suction pipe into the pump, the liquid is continuously from the liquid pool was sucking up and continuously from the discharge pipe flow.

Scope of application:

1. The fountain water, aquaculture;

2. Low head city, farmland irrigation and drainage, irrigation;

3. Industrial and civil supply and drainage system;

4. The hills, mountains of water diversion and hollows out of water.

About debugging work on fountain pump equipment when it has been installed

About debugging work on fountain pump equipment when it has been installed

Fountain with the development of the society, has become an indispensable part in the construction of the city, when the fountain pump equipment installation is completed, should be how to carry out the equipment debugging work?

1. Before electricity inspection work Should check whether the installation environment is close operator prior to power requirements, fountain pump equipment is damaged, wiring have become loose, fall off. Check switch, line diameter, connection, configuration is safe, the layout is reasonable.

2. The debugging Debugging work, pay attention to the fountain pump not access three-phase leakage switch by the frequency converter bottom and start directly with three-phase alternating current (ac).If there is an internal problem such as leakage, short circuit, timely treatment, troubleshooting.

3. Will the fountain pump connected to the inverter, the inverter's control panel, function code set use frequency 50 hz, then adjust the frequency of small increases gradually, observation frequency converter and fountain pump any anomaly. Fountain

4. If the water is not high, the need to adjust the head and flow rate of water nozzle jet, only on the device to reset the target frequency.

In addition to the fountain pump inspection, also need to pay attention to the underwater lamp debugging. Pay attention to whether the lamps and lanterns into the water, put every street lamp received lower leakage switch, all the way all the way down underwater lamp, lamp bad timely replacement, and then access the light controller, fine-tuning the control effect of lamplight. The operation of the debugging is correct, you can rest assured!

If you are interested in our products, please feel free to contact us at any time. Shanghai Weihu Pump Industry Limited Company has been producing and exporting water pumps for over 30 years. Except for fountain pumps, we also produce and export sewage pump, pipeline pumps, submersible pump, and solar-power pumps and so on. Please leave a message to us, or contact us online directly. It has always been our honor to serve our customers. Our product has the best quality and price.

Amazing control technology makes scraped fountain pumps cables working again

Amazing control technology makes scraped fountain pumps cables working again

Abandoned fountain pump after technology of finishing can come back to life, whether very cow! Weihu Submersible pump manufacturers will come to see how to do with you. Hohhot railway bureau of ji-tong railway large plate hydropower plant management system technology research team, will replace down wear overrun and damaged fountain pump combination model for collapse, by adjusting the sprinkler pump impeller clearance and axial clearance, will wear the fountain pump impeller, pump shell, way back to the working state. For the motor shaft spline all bald, the motor shaft and the pump shaft grinding of concentric to deviate from the fountain pump, technical research staff wear pin rivet connection method, the motor shaft and fountain pump shaft concentric fixed in place, make the scrap fountain pump "coming back to life". By means of this repair can save a lot of money! 

Fountain pump cable fountain do not play The fountain is we see everyday by the fountain pump and nozzle jet, and fountain pump there is a cable, although there is a leakage prevention measures, but Weihu Pump still want to remind everybody, it is best not to paddle, it is good to just watch. Citizens also have worry, put the feet into all looks dangerous, leakage, by one thousand. Fountain driven by fountain pump power, buried beneath the fountain has the electric equipment such as electric wire, such as wire equipment aging, daily maintenance and can't completely prevent leakage of safe hidden trouble. Once the fountain pump operation, such as into the fountain pool, there is a risk of electric shock may occur. Weihu pump personal safety awareness of, do not dabble.

Music fountain pump makes your summer cool down, but baby gets allergic

Music fountain pump makes your summer cool down, but baby gets allergic

Fountain pump and music partner Deduce the perfect fountain of beauty Recent urumqi is the red light blue mountain lake "dream red mountain", and music fountain pump partner builds a fountain. Weihu Submersible pump manufacturers learned that during the June solstice 11 September 10, citizens can be in the red mountain to enjoy the water curtain movie, laser music fountain show, taking xinjiang natural scenery as the content, the water curtain movie fountain pump gushing fountains with the folk music fusion of xinjiang, the sound and light in harmony with the natural scenery, folk music, and create the beauty of artistic conception. Fountain pump fountain to cool the hot summer Harbin days high temperature, high degree of surface continue to stay in the heat wave, Harbin we river park in small fountain pool all open, looking at the fountain pump jet spray, suddenly feel filar silk cool idea.

Fountain pump jet fountain baby skin allergy to buzz Since entering the summer, fountain pump jet fountain into hot spots, because of summer heat, fountain pump jet cool fountain, yinde countless children are playing in the fountain, but later the body skin allergy symptoms, widely spread in the circle of friends don't let the children touch the information of the fountain. According to Weihu Pump know, during the Dragon Boat Festival, Ms. Xia take their children to the central plaza, walk, children playing by the fountain, a suit of water splashing."Didn't come home after they found the child's arms and chest back all the little red a knot in one's, a scratch is a."Ms. Xia take their children to the hospital, the doctor said that may be a skin allergy caused by bacteria. Fountain pump every once in a while will be overflowing fountain, there are several fountain mouth throwing plastic bags and water bottles and other debris, although workers often sweep, but square personnel flow is big, hard to avoid can have health corner."Feeling here the water is not clean, summer often have children in the play."Exercise regularly to the square of an old man said. Although the water in the fountain pump is the water circulation, timing quantitative add some disinfectant at ordinary times. But the doctor said, circulating water use for a long time can cause bacteria and harmful substances, for children and people with sensitive skin can cause skin disease, suggest citizens had better not contact the water in the fountain.

What should I do if my water pump does not forward water?

An e-pal asked what he should do if his submersible water pump does not forward water. It is a problem that often happens. Sometimes, you may find your water pump does not forward water, or just forward water intermittently, or forward too little water. We appreciate the question of our e-pal. Now, we are going to make a detailed analysis about this problem, and present some possible causes and troubleshooting methods.

Possible causes: 1) the motor is not started because of low voltage, cable too thin and too long, too much voltage drop, or water pump impellers got stuck, for instance. 2) The pipe line or the filter screen is clogged. 3) The pipeline is cracked. 4) The suction inlet reaches above water. 5) The submersible pump rotates reversely. 6) The wear-ring of impellers and the sealing ring are worn out. 7) The impellers are loose or clogged. 8) The rotor shaft becomes loose or the rotor bar is broken.

Troubleshooting: 1) check the electric circuit to find out the cause for motor failure and remedy it. 2) Clean off the clogging material. 3) Repair the cracking part. 4) Move down the submersible pump. If it still doesn’t forward water, may be what you need is beyond its lift range. We suggest you to change for another pump. 5) Exchange any two of the cable connections. 6) Replace new impellers and sealing rings. 7) Reinstall the impellers, clean off the clogging material. 8) Repair or replace the rotor.

If you have any other question about you water pump, either sewage pump, submersible pump, pipeline pump, or centrifugal pump, please feel free to contact us. We are willing to be helpful. As one of the largest water pump manufacturers in China, it is our responsibility to share knowledge about water pumps and to solve small problems of water pumps for users.

Bearing and shaft problems of pump motors

Water pump operators may find the read on current meter is beyond rated value, or the pointer of the meter swings back and forth, or the motor cannot be started but keeps booming, which indicates there is some problem with the bearing or shaft of the pump. This problem may be caused by different specific reasons. Each reason has its correspondent solution.

Problem: electric current too large or the pointer of electric current meter swinging back and forth.

Causes: 1) Excessive flow quantity and low pump head, both beyond the application range, leading to overload of motor. 2) The graphite pump bearing of the motor is worn, or the rubber bear of the pump or shaft sheath become worn out. 3) Thrust bearing worn out, impellers move downward. 4) Pump shaft bends, making the bearings not concentric.

Solution: 1) Reduce the flow quantity. Move the valve to return the flow quantity to rated value. 2) Change for a new bearing or shaft sheath. Check if the water in well contains too much sands. 3) Replace thrust bearing and thrust plate. 4) Send the bent shaft back to factory for maintenance, or replace a new bearing.

Problem: The pump motor cannot be started but keeps booming.

Causes: 1) guide line open-phase or switch open-phase (run with single phase). 2) Motor guide bearing journal sticking. 3) There is foreign object in the impellers or the pump body is stuck. 4) Voltage too low.

Solution: 1) Repair the break line, make up the fuse wire. 2) Remedy or replace the bearing. 3) Clean off the foreign body. 4) Adjust the voltage.

If the above suggestions still cannot solve the problem of your pump, please feel free to contact us. Our engineer will offer even better solutions. As one of the largest water pump manufacturers in China, it is our responsibility to share knowledge about water pumps and to solve small problems of water pumps for users.

How to select a correct model of small fountain pump?

First, select standardization fountain pumps

Standardization of the fountain pump is the country according to the requirements of ISO formulation, implementation of the latest model of the pump. Its main characteristic is small volume, light weight, excellent performance, easy operation, long life, low energy consumption. Should be according to the local power supply situation to determine single-phase or three-phase pump. 

Second, the choice that could satisfy the requirement of lift pump Head refers to the head, and not carry water height, clear that to choose the pump is particularly important. Pump head is about 1.15 ~ 1.20 times the height of water. Such as a water to water the vertical height of 20 meters, the head needed for about 23 ~ 24 meters. Choosing fountain pump should make water fountain pump nameplate on the head with the best head needed close to such a case, the pump efficiency is highest, and use will be more economic. But not necessarily demands absolute equal, as long as no more than 20 general deviation, the pump can be in the energy conservation work.

Third, choose appropriate flow pump The flow of water pump, the water yield, generally unfavorable choose too large, otherwise, would increase the cost of buying pumps. Should be specific analysis, such as user your draft with self-priming pump, flow should try to choose smaller; Irrigation with submersible pump, such as the user can select appropriate flow a few bigger. In addition, the fountain pump when the choose and buy need to see the model accords with the design value; usually buy the theoretical value larger pumps. At the fountain pump size selection should also be specific analysis.

If you are interested in our fountain pumps, please feel free to contact us. We are Shanghai Weihu Submersible pump manufacturers Co., Ltd. We always welcome client questions. You can leave a message to us, or contact us online directly.

What's the difference between a fountain pump and spray pump？

Some e-pals consulting fountain pump and spray pump have what different? Literally just there, of course, but in fact both differ greatly. Weihu Submersible pump manufacturers today is to tell everyone about what fountain pump and spray pump. Distinguish from the purpose: Fountain pump is mainly used for water fountain, aquaculture and so on. Widely used in low head city, farmland irrigation and drainage, irrigation, industrial and civilian supply and drainage system, hills, mountains of water diversion and hollows out of water. Spray pump is usually of roof water tank filled with water, when fire sprinkler after the temperature reaches a certain temperature (68 ° C) normally automatic blowout, pipe under the action of water on the roof water tank automatically, wet alarm valve will automatically open at this moment, the pressure inside the valve switch is automatically opened, and the pressure switch has a root signal lines and chain XBD fire fighting pump, spray pump is automatically started. Then spray fire pump pools of water through the pipe to the hydrant, the roof water tank and nozzle, the fire protection system began to work. Is simply for the use of landscape, is a fire. Purpose is different, is not the same as the professional. Of course, look from the exterior is also different.

Some e-pals said fountain pump outlet is cast iron, if want to gate valve connection to want how to connect? Is the need to hose even or welding? Weihu pump industry today is to explain it with all of you. If you can would use hose, hose connection. Cast iron pipe welding for welding when demand is higher, need to master some professional welding operation, and choose special special cast iron welding rod, cast iron welding rod fakes and more. From the welding control three problems: the control of carbon, elimination of stress, the adjustment of structure. Suggestions can choose better welding materials, crack resistance are good. Sewing process, in addition, the structure can be taken to increase the stability of welding effect.

The bright prospect and problems of stainless steel fountain pump

The bright prospect and problems of stainless steel fountain pump

Stainless steel fountain pump industry prospects Weihu pump industry belt you know its advantage

Fountain is very common in our daily life, then the fountain besides the function of the beautiful, still can purify air, beautify the environment, for entertainment, promote people's physical and mental health. Now fountain industry has developed rapidly, and at the same time for the design of the fountain continuously put forward higher requirements. Traditional fountain pump more cumbersome, inefficient, need to build complex pump chamber, high maintenance cost, large energy consumption, noise is big. Weihu Submersible pump manufacturers stainless steel fountain pump were recommended for everybody. The fountain pump small size, large head, easy installation, low noise, energy conservation, environmental protection, the application in the fountain industry has broad prospects. Fountain pump must meet the high power stop quickly and accurately, and the output power must be able to accurate control, so what kind of motor with what kind of control mode can realize the requirement? A enthusiastic netizens replied, need dry fully enclosed diving three-phase asynchronous motor, frequency conversion technology.

Five reasons that fountain pump is not out of the water 

The fountain pump without water what reason be? Generally there are five reasons. Reason 1: impeller badly worn Impeller blade wear after the long-term use, can affect the fountain pump performance. Reason two: bottom valve to open it Usually because fountain pump hold time is too long, bottom valve gasket was stick to death, without bottom valve of the gasket may be rust. Reason 3: bottom valve blocked filter net Bottom valve caused in the sludge layer potential water filter clogging. Reason four: the export pipeline leakage Export pipeline leak will affect the amount of water. Finally, gate can check fountain can result from a failure or jam can't reduce even water pump flow.

On fountain pump maintenance and overhauling

On fountain pump maintenance and overhauling
Do we need to disassemble the fountain pump and add lubricate oil annually for maintenance?

Weihu Pump see a net friend for help, fountain pump apart preview for a year to maintain? So how should maintain? First of all, need a year apart preview fountain pump maintenance depends on what brand of fountain pump, pump imported basic are maintenance-free. Domestic pump no annual maintenance, 3 years maintenance time. Of the ways to maintain good fountain pump is one of the bearing body join bearing lubrication oil, should observe the oil level in oil mark the centerline, lubricating oil should be timely replacement or supplement. Stainless steel fountain pump work in the first month, the oil change 100 hours, after every 500 hours, the oil change at a time. On the issue of the fountain pump maintenance, Shanghai Weihu pump industry will share more practical skills in the future.

Crescent lake May 1 fountain water dance drama Workers complete overhaul fountain pump

According to Weihu Submersible pump manufacturers understanding, fushun crescent lake stage fountain water dance before May 1, 22, the workers comprehensive maintenance and debugging a fountain of underground music fountain pump equipment, as well as to the gallery of individual cable is updated. Site maintenance supervision please says, they start on April 18, enter the site, to music fountain, fountain pump unit conducted a comprehensive inspection, including submersible pump degusting processing, circuit layout, replace the solenoid valve and some wearing parts, such as map lights, and all the operation of the mechanical equipment maintenance, repair work will be completed within a week, and then spray and music selection, commissioning perfect unified "51" holiday "dancing water show" again.

Is the water ejected from fountain pumps really harmful?

Is the water ejected from fountain pumps really harmful?

A doctor has made a professional answer.

After Weihu yesterday reported "fountain pump outflow fountain can let the children play?", the following Weihu continues to bring you to understand fountain pump gushing fountains at ordinary times is how to clean and maintain, and whether it really be a health risk. According to the person is in contact with water fountain, which has two kinds of ornamental fountains and paddle fountain. In view of the two different kinds of fountain, the requirements of national standards for water quality is different. Fountain for cleaning and maintenance is very strict, general fountain open during the summer before, first by the epidemic prevention station staff to cleaning and disinfection of the fountain pool the whole time, and then open water, after open will not regularly disinfected to water bodies, and circulating water is adopted to ensure the water quality good. Happened accidents due to the fountain, improved the fountain of state safety standards of the state, to paddle the fountain of the water quality put forward higher requirements, and the fountain of the fountain pump cannot directly on the underwater, want to have separate fountain pump room, to prevent leakage. About the cockroaches in the fountain mice, Weihu Submersible pump manufacturers in the article talked about yesterday, is generally not. General neighborhood a month will put clean water fountain, clean thoroughly, the month and would be a pill, is a swimming pool with the kind of disinfection. Because it is open to the water body, a long time will be a little green, staff every morning and afternoon will be open for an hour and a half each time cycle. The fountain mouth is very small, only about 3 cm in diameter. Fountain in the ditch was killed by a stainless steel mesh cover, mesh only 0.5 cm, sports a pebble, how could the mouse by? About said yesterday that the eggs into the water, will contact with the skin disease, dermatologists said, basically be alarmist, put some occasional event exaggerated. Any animal's survival needs certain conditions, the priority is plenty of food, fountain pump gushing fountain does not comply with this condition. And the channel of the fountain is not suitable for these animals to survive. As for the pink eye, trachoma and other disease belong to microbial infection, infection was a virus or chlamydia, usually transmitted by the human body skin contact, so easily outbreak in kindergartens, schools. Swims for the inner loop of the fountain, unless you skin or eye disease in children, is likely to spread these diseases. Even so, the children are playing in the fountain and be careful not to drink the water fountains, because the fountain pump equipment generally old and may be bacteria. Drink two, is likely to be infected with the intestinal diseases. The children to stay away from the fountain outlet, do not despise the fountain pump injection power. In addition to fight the leakage risk. Children to play with water fountains don't rub the eyes, but also must take a shower after go home.

Safe Operation of Deep Well Submersible Pump

Deep well submersible pump unit with oil and water immersion in two ways, and in order to ensure the deep well submersible pumps to normal and effective operation, you should pay attention to the following precautions:
1, start to check whether the cable is normal, there is no fracture, cracking, abrasion and other phenomena, if there are several phenomena that should be immediately replaced, to prevent leakage phenomenon;
2, check the water pump pipe has cracked, the connection is solid;
3, deep well submersible pump into the water or hanging out of the water, you can not pull the cable to avoid cable breakage;
4, the pump into the water before the pump should be filled with water, in the venting, but also to check the pump start and idling is not normal. Its steering to the appropriate inspection to see whether the correct turn;
5, oil immersed motor immersed in water, it should first replace the sealing element into the water after; flooding motor should be filled with water after the bolt fastened and then into the water;
6, should check whether the motor insulation resistance is normal, the normal value should not be less than 5 megohm;
7, deep well submerged pump unit into the water should be placed vertically, but not tilted or tilted put;
8, the pump unit start-up voltage must be normal, the power of the film should be rated about 5% of the voltage;
9, deep well submersible pump delivery medium should not contain a lot of sediment or mud, sediment content can not be too high, and the pump running for some time, should be on the pump and motor cavity should be cleaned;
10, the pump used in the lift should be within the rated head, so that can improve the efficiency of the pump, energy saving, can effectively avoid the pump motor overload operation, which makes the motor damage;
11, the pump if not for a long time, it should be cleaned and painted with rust-proof paint, placed in a dry environment, and the pump motor should be its cavity water dry and dry.

Stainless steel submersible pump single – ended mechanical seal

Stainless steel submersible pumps are designed with single-ended mechanical seals. It should be noted that there are many parts of mechanical seals, high precision, high installation and removal requirements, the corresponding cost is also higher shortcomings. However, from the actual needs and production point of view, the use of mechanical seal advantages and disadvantages, mechanical seal is the future development trend.
1) The main sealing the original: by the moving ring, static ring, composed. Dynamic ring and static ring are generally made of different materials, a lower hardness, a higher hardness. But two rings may be made of the same material depending on the circumstances.
2) auxiliary seal original: by the dynamic ring seals, static ring seals and other appropriate gasket composition. According to different requirements, auxiliary seal original O-ring, V-ring or other shape of the seal ring. So as to absorb the vibration of the sealing surface has an adverse impact on the auxiliary seal ring of the original commonly used rubber or plastic and other materials.
3) Compression of the original and other auxiliary components: such as springs, push rings, drive blocks, anti-pin, etc., and to ensure that the dynamic ring and static ring work of other parts necessary for this type of original. As the working conditions of mechanical seals are complicated, the frictional heat is generated continuously between the moving ring and the stationary ring sealing surface during operation, which results in vaporization of the liquid film between the moving ring and the stationary ring, aging, coking and deformation of some parts. . Therefore, in the choice of mechanical seal, it must also pay attention to the mechanical seal cooling.

Submersible pump motor maintenance

Daily maintenance of submersible pumps. Check the power cord every day without damage, the absolute prohibition of leakage of submersible pump water operations. Check the pump body every day for damage, to ensure that the motor at work without leakage. After the operation, should be promptly clean up the debris attached to the pump, the pump rinse. In order to ensure the normal operation of submersible pumps, must be in accordance with the following requirements. Stainless steel submersible pump before use, shall use the megger to check the motor insulation resistance, the minimum value can not be less than 50MΩ.
Flooding motor should be open irrigation plug, filled with clean water and then tighten the screw plug, screw plug irrigation can not be screwed directly into the well. Check the cable for breakage before use. If damage should be replaced in time to prevent leakage. Submersible pump in the water before the pump should be injected into the water, and then idle for 1-2 minutes, and start twice to check whether the normal start and idle, turn to meet the requirements. If the steering is reversed, replace any two-phase wiring. Check the water pipe is cracked, the connection is firm. Submersible pump down and lifting, never allowed to pull the cable to avoid damage to the cable or disconnect the joints, resulting in undue accidents. Wire or card board should go down and lifting.
The supply voltage should be controlled within ± 5% of the rated voltage so that the motor can operate normally. If the voltage is too low or too high, the motor can not continue to use, so as to avoid long-term motor over-voltage or undervoltage damage. Submersible pump submerged into the water should be vertical hanging, not diagonal. Into the water depth of 5 meters under the moving water level is appropriate. Submersible pump shall not transport high water content of sand or mud. Submersible pump the actual head should be 0.8-1.1 times the rated head in use, in order to improve unit efficiency, energy conservation, while avoiding motor overload.
Submersible pump motor wiring must be real, in order to avoid the motor phase running motor burned. Cable must always check for cracks, abrasions, etc., there is a timely replacement or repair. Oil immersed motor if the phenomenon of oil spills should be promptly to the factory or repair point of repair, replace the sealing element. Flooding motor should always clean the sand inside the motor cavity, replace the motor cavity water. Submersible pump running six months after the maintenance inspection should be to replace the damaged parts. Submersible pump, the flooding motor should be placed within the net motor water, the pump clean, coated with oil rust, and stored in a dry place.
Submersible pump does not start after the water, less water or intermittent water
The reasons for the failure are: over-current parts such as filters, impeller, diversion shell, Yang pipes and other components are blocked, or Yang pipe fracture, which often occurs when the ammeter readings increase and the pointer violent swing, unit, pipe vibration Unit, but the water is less, because some of the over-current part of the blockage, supporting unreasonable, or need to lift more than the pump rated head too much, in which case, the pump should be replaced, The need for a higher head of the pump, the impeller is also possible to reverse the direction, just the introduction of any two-phase connection can be, in the case of excessive wear ring seal or impeller, should replace the seal ring, repair or replacement of new Impeller; unit rotation is normal, but not water, mainly due to the moving water level in the pumping process down too much, can be closed on the small water valve, reducing the water, or pump down, if the depth of the pump reaches or exceeds the pump requirements The use of the range is still not ideal, then the pump used properly, should be for a smaller flow pump.

Submersible pump manufacturers to talk about the pump lift and what is relevant

Many users to buy pumps, we may know that the pump is the head of what is the decision, and today we are talking about the Shanghai Submersible Pump manufacturers, I hope the person is not very understanding of the pump help.

     First of all, we talk about what is the pump head, the pump is the lift pump can lift the height. Then talk about the pump head and what a relationship.

     The first is the relationship with the blade exit angle, when the other for the fixed value, the larger the blade exit angle, with the flow of the theoretical lift also increased accordingly.

     Second, with the number of leaves, as the corresponding, the other for the fixed time, regardless of the case of flow loss, the more the number of leaves, the greater the theoretical lift.

     Third, there is a relationship with the speed, here involves an equation, the Euler equation can be drawn, the higher the speed, the greater the lift.

Submersible pump should be how to selection

When we choose the submersible pump, we should first consider whether the normal submersible pump manufacturers, and then confirm the parameters, understand the market conditions, to confirm the price of submersible pumps, the following we say for the submersible pump selection method.
1, the submersible pump flow is selected one of the important performance data of submersible pumps, it is directly related to the entire production capacity and transmission capacity. Such as the Design Institute process design can calculate the pump normal, minimum, maximum three kinds of traffic. Select the submersible pump, based on the maximum flow, taking into account the normal flow, in the absence of maximum flow, it is usually desirable to 1.1 times the normal flow as the maximum flow.
2, the installation system is required to lift the pump is another important performance data, the general use of amplification 5% -10% margin to head selection.
3, the liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, the physical properties of the temperature c density d, viscosity u, solid particles in the media diameter and gas content, which involves the system head, Erosion margin calculation and the appropriate type of pump: chemical properties, mainly refers to the liquid medium of chemical corrosion and toxicity, is the choice of pump material and the choice of an important basis for the type of shaft seal.
4, the device system piping layout conditions refer to the high degree of liquid to send liquid to send liquid from the direction of the suction side of the minimum liquid level, the discharge side of the maximum liquid level and some data and pipe size and length, material, pipe specifications, the number And so on, in order to carry out the comb head calculation and the NPSH check.
5, the operating conditions are many, such as liquid operation T saturated steam power P, suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature operation is the gap or continuous, the location of the submersible pump Fixed or movable. Submersible pump with high speed, small size, light weight, high efficiency, large flow, simple structure, no pulsation of the infusion, stable performance, easy operation and easy maintenance and so on. So that the selected submersible pump type and performance in line with the device flow, head, pressure, temperature, cavitation flow and other process parameters. Mechanical reliability, low noise, vibration. The economy to take into account the equipment costs, operating costs, maintenance and management costs the lowest total cost.
 
Therefore, in addition to the following circumstances, should be used as far as possible submersible pumps:
1, metering requirements, the choice of metering pumps
2, the head request is very high, the flow is very small and not suitable for small flow high-lift submersible pump can be used, the choice of reciprocating pump, such as cavitation requirements are not high can also use the vortex pump.
3, head is very low, large flow, the choice of axial flow pump and mixed flow pump.
4, medium viscosity (greater than 650 ~ 1000mm2 / s), consider the choice of rotor pump or reciprocating pump (gear pump, single screw pump)
5, the medium containing 75% of the gas flow rate is small and the viscosity is less than 37.4mm2 / s, the choice of vortex pump.
6, the start of frequent or inconvenience irrigation pump occasions, should be used with self-priming performance of the pump, such as self-priming pump, self-priming vortex pump, pneumatic diaphragm pump.

Submersible pump unit installation steps

When we use the submersible pump, the use of the submersible pump the entire unit, submersible pump unit installation is how to install it? The following by the Shanghai Submersible Pump manufacturers and we say, we want to help:
First, the pump outlet to install a pump tube, and clamped with a clamp, hanging down into the well, so that the splint is located in the well stage.
Second, a pair of plywood and then clamped another section of water pipes. Then lift, lower and then connected to the flange of the flange connected with the pad, the screw must be diagonal at the same time. Raise the lifting chain to remove the first clamping plate, so that the pump down the splint and fell on the well stage. Repeat installation, go down, until all Zhuangwan, put the covers, the last pair of splints will not be demolished on the covers.
Third, the installation of elbow, gate valve, outlet, etc., and add the appropriate pad seal.
Fourth, the cable to be fixed in the groove on the water pipe flange, no section with a rope fixed, down the process to be careful not to bruise the cable.
Fifth, the process of the next pump, if the card is not the main phenomenon, then we must find ways to overcome the card point, can not force the next pump, in order to prevent being stuck.
Sixth, the installation is strictly prohibited personnel down the job.
Seventh, the protective switch and starting equipment should be installed in the user’s distribution board, the distribution board has a voltmeter, ammeter, light, and placed in the well room in place.
Eighth, the use of “wire from the motor base to the pump tube bundled,” the force of protection measures, in order to prevent accidents from happening.

what are the reasons of Stainless steel submersible pump motor overload

Stainless steel submersible pump material can be divided into 304,316 and 316L and so on, whether it is stainless steel or cast iron, the motor overload and the material does not matter, then lead to submersible pump motor overload what are the reasons? Here are the manufacturers of Shanghai submersible pump and we say.

First, the supply voltage is too low
Submersible pumps in rural areas under the conditions of more than rated voltage operation, the stator windings in the current increase more, resulting in stator winding temperature rise more and more overheating burned.

Second, pump selection improper
The actual use of the load conditions and the selected submersible pump does not match the form; selected submersible pump head is too high or too low.

Third, mechanical failure
Stainless steel submersible pump bearings are seriously damaged, stator and rotor friction “swept chamber” or pump impeller and other debris by water and other debris and other mechanical failure will result in submersible sewage pump stator winding burned.

Fourth, the quality factor in the manufacturer or repair
Stainless steel submersible pump manufacturers and repair quality causes submersible pump overload.

Causes of Common Problems in Deep Well Submersible Pumps

When we use the submersible pump, it may encounter some problems, so how should we operate? What are the causes of the problem? The following by our Shanghai Submersible Pump factory and we say, to give you a reference.

The first may encounter problems with nerve submersible pumps starting or running with large currents and sometimes even tripping

The reasons for this are:
1, power failure, power shortage.
2, the power cord is too long too small, the pressure drop is too large or the supply voltage is too low.
3, contactor damage or thermal relay trip. (Fault red light)
4, the power cord into the motor line, automatic box within a break or loose into the line phase.
5, the motor has been damaged.
6, the pump has a foreign body card machine.

Let me talk about the exclusion method:
1, check the power supply, excluding phase.
2, increase the cable, improve the supply voltage.
3, check or replace the contactor, thermal relay to be manually reset after cooling.
4, check the line is good.
5, check the motor or replacement.
6, clean up foreign body.

The second problem is the deep well submersible pump pumping is not the water or the water current is too large or too small

cause:
1, pump reversal.
2, the pump head is too high, the actual head low.
3, pumped into the water is blocked.
4, the motor windings on the thermal insulation resistance of less than 0.5 megohm.
5, the aging of electromagnetic wire insulation or damage.
6, rubber cable damage.
7, sealing joint failure.

Solution:
1, open the winding, with self-adhesive tape bandage or re-wound around the new coil.
2, to find the damaged place, with self-adhesive tape re-bandaged.
3, split, good, re-bandaged.

The third problem is the deep well submersible pump no water or intermittent effluent or water less failure

cause:
1, the motor does not start (such as voltage, wire too small too long, the cable pressure drop too large or stuck pump start is not up)
2, pipe plugging or drainage network blocked.
3, pipe rupture or gasket damage.
4, suction surface exposed.
5, submersible pump steering the opposite.
6, Impeller ring and seal ring wear.

Let me talk about the exclusion method:
1, remove the circuit fault, find out the cause of stuck and ruled out.
2, clear the blockage.
3, repair rupture Department.
4, decentralization submersible pump, if still no water, may be more than submersible pump lift range, the proposed change pump.
5, the exchange of any two cable connector.
6, replace the new impeller, seal ring.

How to improve the life of the stainless steel pump

How to extend the service life of stainless steel submersible pump it?

First, confirm the correct direction of motor rotation

Should find out the direction of rotation of the motor, there are many types of submersible pumps are forward and reverse when the water can be, but the reversal of the small amount of water, current, if the reversal of a long time will damage the motor winding.

Second, prohibit the power supply voltage abnormal boot

As the low-voltage power supply line is relatively long, the end of the line voltage is too low is common. When the phase voltage is below 198 volts, the line voltage is lower than 342 volts, submersible pump motor speed down, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in long start-up winding power and even burn Windings and capacitors. Conversely, a high voltage causes the motor to overheat and burn out the winding. Therefore, the submersible pump in operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage, higher than 10% of rated voltage above, the motor should stop running, find out the cause and troubleshooting.

Third, the cable installation and submersible pump insulation resistance requirements

Install the submersible pump, the cable to overhead, the power cord should not be too long. Submersible pump into the water or put forward not to force the cable to avoid breaking the power cord. Do not sink submerged pump in the mud, otherwise it will lead to bad motor cooling and burn motor winding. Installation, the motor insulation resistance should not be less than 0.5 megohm.

Fourth, the installation of leakage protection

Leakage protection device, also known as protectors, its role from the “security device” the three words can be understood. Because the submersible pump in the water, easy to leakage caused by power loss or even lead to electric shock accident. If the leakage protector is installed, the leakage protector will cut off the power of the submersible pump to ensure the safety and avoid the leakage and waste of the electric energy as long as the leakage value of the submersible pump exceeds the operating current value of the leakage protector (generally not more than 30mA).

5, to avoid frequent switching

Do not frequently switch the submersible pump, this is because the pump will stop when the return flow, if immediately start, the motor load will start, resulting in too large starting current and burn the winding. Due to the large current at start-up, the frequent start-up also burns the submersible pump motor windings.

6, let the submersible pump long-term overload

In order to avoid long-term overload of submersible pump work, do not smoke a large amount of water and observe the current value is on the nameplate value, if the current is too large, should stop checking. In addition, the dehydration pump running time should not be too long, so as not to make the motor overheating and burned.

7, pay attention to routine maintenance

Usually should always check the motor, if found under the cover of a crack, rubber seal ring damage or failure, should be replaced or repaired in time to avoid water infiltration submersible pump.

Submersible pump should be how specific maintenance

Submersible pump is a major water pumping device, then how should the repair and maintenance of it? The following by the Shanghai Submersible Pump manufacturers and we talk about, but also to provide a reference.

Before using the maintenance

1, submersible pump if not used for a long time and on the water when used before the pump from the machine downhole or other waters put up to check the parts, rust paint, to prevent corrosion of parts.

2, running 2-3 years of submersible pumps, pumps and motors should be removed, cleaning all the parts, but also remove the screws, cleaning the impeller in the chamber of sediment and debris.

3, check the pump and motor bearings, impeller ring, thrust bearings, thrust plate and other vulnerable parts, wear serious to be replaced.

4, check the pump on the fasteners, rust slowly unscrew, ritual a little oil , damaged to be replaced.

5, check the sealing parts of the pump, and some because of friction and washer rot, water into the sealed cavity, so that the rotating parts rust and not flexible or simply turn fixed. For the corrosion of the moving parts and damaged seals, to re-replace the new pieces.

6, to check the cleaning and repair parts, re-assembly together. Assembly, the bonding surface and the fastening body should be coated with butter, to prevent rust, affecting the next demolition.

If after a few steps above the maintenance, submersible pumps can basically be used normally.

If there is need to store, then the storage should be how to maintain it? Here we continue to say.

1, when not in use, the pump should be stored in the ventilation drying room, so as not to damp motor.

2, wet submersible pump storage in winter before storage, you must let go of the internal lubrication of the motor cooling water, so as not to freeze frozen bad motor.