Design performance standard of fountain pumps

In the installation of fountain pump, is generally divided into vertical, inclined, horizontal three kinds, widely used in the production of life are generally large flow high head fountain pump, high flow low head fountain pump and so on.

Different applications for fountain pump requirements are different, but the general sense, stainless steel fountain pump in performance is a common standard. Stainless steel fountain pump for long periods of continuous operation, which requires the pump to ensure that the design parameters, good design suitable flow and head, and to ensure that the pump impeller in various operating environments do not produce gas cloud phenomenon, to ensure the pump in any operating condition under abnormal vibration. General pump must work continuously, so the pressure pipeline oh great, deformed sometimes occur, which requires suppliers to provide the Pipeline and moments acting on the thrust of the pump interface allows the tolerance range.

With the development of industrial production, more and more modern urban construction of these material requirements are higher than before, the choice of fountain pumps must pay attention to the stainless steel fountain pump performance requirements, fully understand in order to achieve high efficiency utilization, increase production speed and quality of life.

what material choosed by fountain pump

Fountain Pumps Product Features

DR470 cold-rolled steel material used, the impeller to increase anti-loosening means, bearings and other special bearings.

 

Fountain Pumps Scope

 

1. pump should be completely immersed in running water, diving depth of not less than 0.5 meters, no more than 5 meters.

2. Ambient water temperature should be no higher than 40 ℃.

3. Working medium is non-corrosive water, sediment concentration is not more than 0.1%, PH value of 6.5 to 8.5.

4. Power should be a three-phase 50 Hz, rated voltage of 380 V, the supply voltage must ensure that within the range of 342 to 420 volts.

5. Pump should be used within the scope of the rated lift nearby.

6. Configure the pump should start protection, reliable ground.

Fountain pump motor features introduction

1. a wide range of automatic water pump motor control cabinet use.

For a variety of occasions, such as living water supply, fire sprinkler pressurized, air-conditioning cooling cycle pump, industrial control pumps, sewage pumps and other sewage has a corresponding model specifications. Control motor power range: 0.18 ~ 280KW.

2. high quality fountain pump motor.

A selection of international and domestic brand electrical components and high-quality standard cabinet, well-designed, precision production.

3. the pump motor is fully functional.

Control from a one to one control four main and backup pump arbitrarily selected combination of a variety of start-up mode, various types of control, fault usurped advised to switch, can also provide you designed.

4. the fountain pump motor service satisfaction.

We stand ready to provide timely pre-sales consulting and after-sales service, so you never worry about.

Conclusion continue to practice and exploration, improve the quality of the installation before the wellhead fountain pump to ensure normative and durable installation. In addition, the installed submersible pumps continuous downtime must not exceed 14d, otherwise, the impurities in the water, precipitation in the bearings and impeller clearance, or even block the pump shaft. If the work environment requires downtime than 14d, 14d start at intervals of at least one operation 5min, in order to ensure the unit at any time boot use.

The basic way to prolong the service life of fountain pump

1, fountain pumps should be preceded by opening the inlet valve and valve sealing liquid pump, check whether the pump body has been filled with liquid;

Lockout procedures: slowly off the pump outlet valve; motor pressing the button stops the motor; pump inlet valve to close and seal valve.

Fountain pump periodic inspection. Centrifugal pump cycle can be divided into the following three general inspection and increased shaft deflection, and even the shaft fatigue fracture. If you can not increase the traffic on the production, you can consider increasing the reflux from the process piping, in order to achieve the purpose of regulating traffic.

Fountain pump monthly checks. Without disassembling the outer parts of the equipment for cleaning and minor repairs, including temperature checks on aspects of bearing, shaft seal leakage causes and motor insulation and the like.

2. Slowly open the outlet valve of the pump flow and pressure indication by the need to adjust the outlet valve opening. Is normal, the various parts of the unit to check for leaks; check the degree of packing compression, usually padding should be a small amount of leakage (no more than 10 drops per minute to 20 drops); mechanical seal leakage should not be greater than 10ml / h (per minute about 3 drops); rolling bearing temperature should not exceed 75 ℃; sliding bearing temperature should not exceed 70 ℃; any abnormal sound, abnormal vibration, reducing the amount of water situation.

Accurate selection of fountain pump flow, head, ensures fountain pump in the course in the best performance state. If the fountain pump operation at low flow conditions in the fountain pump can cause circulation whirlpool, and a radial force, the impeller in an unbalanced state, to increase the load bearing, causing damage to seals and bearings, low-flow but also serious the fluid temperature, turbine and centrifugal pump casing damage routine inspection.

Use of checks, including: check a variety of instrumentation is working properly, stable, the current should not exceed the rated value. Pressure gauge pointer should be in the range of design; check the pump out the water and the correct use of the periodic examination is the fundamental way to extend the life of the fountain, check the sliding parts wear, corrosion damage inspection of the components contact with the liquid and the like.

Fountain Pump regular maintenance. Including the replacement of the shaft seal lubricant, check the pump and motor on the situation, check the bushings wear, check the coupling rubber ring damage, cleaning mechanical seals, coolant filter and.

3, confirming the pump body has been filled with liquid and sealed fluid flow is normal, start fountain pump;

Proper startup and shutdown procedures, the operating procedures.

How to solve problems caused by operating errors of fountain pump

Improper fountain pump selection and operating errors are likely to cause vibration or spray from the water column is not enough, these potential causes fountain pump vibration is how to handle it? Wel Pump fountain pump will use problem solutions are as follows: 

First step: should be to ensure that the same two pumps in parallel pump performance. Pump performance curve should be gradual decline as well, can not have a hump.

Step two: the elimination of the factors leading to the fountain pump overload, such as flow channel blockage; appropriate to extend the start time of the pump and reduce disturbance to the drive shaft, reducing the rotating parts and the stationary parts and the friction between the collision and the resulting thermal deformation; for water lubricated plain bearings, the boot process should be added to the pre-lubricated enough water to avoid dry start, then stop the water until the water pump.

Third step: the right amount regularly to the bearing needs oiling oiling, the long axis of the liquid under centrifugal pumps, because there is shafting torsional vibration, the use of thrust tile is damaged main thrust tile, then it can appropriately increase lubricant viscosity, prevent damage hydrodynamic lubricating film.

Step four: fountain pump is recommended in order to prevent the amplitude is too large, you can also use vibration measurement and analysis to determine the optimum operating condition parameters of the pump. Fountain Pump reasonable structure, beautiful appearance, very reliable, frequent starting to adapt to operational requirements and frequency and easy installation on water pollution in line with environmental protection requirements, a majority of users love the product, is an indispensable tool for the pump fountain dedicated.

Fountain pumps use in a hydrophobic environment engineering

Fountain Pump structure is mainly composed of QJ submersible pump and QS submersible pump. QJ fountain submersible pumpmotor is located in the upper end of the pump, centrifugal impeller, bearing water lubricated rubber bearings, pump and motor shaft coupling with rigid connection. In the upper end of the pump has a check valve to prevent the pump when the outage, caused by backflow of water submersible pump reversal. QS foutian submersible pump motor stator windings polyethylene insulated nylon jacket magnet wire. Motor cavity filled with clean water, to cool and lubricate the motor vehicles bearing the motor inside the rubber film can tune the body to adjust the motor temperature rises due to water expansion and contraction caused by pressure, the upper shaft of the motor is mounted by the rejection sand ring and two reverse-mounted sand trap to prevent water and sediment into the body interior.

Preparation before installation because the pump bearings water lubricated material, and therefore must not dehydrating operation. Even in the short time the starter motor should absolutely avoid running dry, so as not to damage the pump bearings. Check the motor part: to go down before the motor, check its assembly quality is good, the fastener without loosening the cable without damage, and electrical power supply device is reliable. Power supply voltage, frequency and whether the nameplate match; check the rotation of the motor shaft is flexible. And transit without injury, shaft rotation is flexible, the amount of narrow axial whether the requirements of the check valve operates. Before pump into wells, water must be clean (free of sand) filled motor.

Technology of cable connector by the process method (refer to the manual), the motor cable outlet and supporting the external rubber cables connected. Check the winding (including cable outlet) on the base insulation resistance of not less than 200M8. Rotated from the pump well water section of the check is flexible, if stuck phenomenon, should identify the reasons be excluded. The pump and motor are coupled together with screws and good. Installation of equipment and tools required to (1) reliable lifting equipment (such as a small crane) (2) applies wrenches, hand hammers, screwdrivers, electrical tools and megger, clamp meter and so on. (3) cable lashing line.

Installation Pump

(1) of the check valve in the pump connected to a short pipes, pipe clamp in place to install plywood. The pump lifted slowly into the well, until well into the plywood reliable platform, release the hook, the second section of the tube securely connected to the first section of the pipe, fastening screws, and then remove the first pay plywood, as described above, the pump continues to fall, all installed piping (ascending pipe). Finally, the splint in place of the tube, is firmly fixed in the well platform, connected to water elbow (head).

(2) to sneak into the pump should move below the water level, from the bottom of the bottom is not less than 3m, but sneaked into the depth of not more than 70m. Motor section can not be installed to the contact sediment site. Otherwise, the motor because heat is not good, it will overheating.

(3) cable during installation to go down, and should not distort unduly tensioned wire cable applications with each section pipes (ascending pipe) the upper and lower ends of banding together.

Characteristics of small fountain pump

Small fountain pump has the following main features:

1, life expectancy up to 10 years without maintenance, small size, high efficiency, low power consumption

2, the stator part of the motor and the circuit board using epoxy potting and completely isolated with the rotor, to solve the leakage problem DC motor pumps produced by long-term diving, underwater installation and can be completely waterproof

3, the same voltage can make a variety of parameters, such as 24V pump head can be made of 2 meters, it can also be made head 7 meters. The pump can run wide voltage, such as 24V pump can run at voltages 24V or less.

4, the fountain pump axis high-performance ceramic shaft, high precision, good shock resistance, since the use of pumps with precision ceramic sleeve and ceramic shaft, the noise less than 35 decibels, even a little power can reach 30 decibels, almost to mute the effect.

5, the three-phase pumps Hall program-driven pumps can achieve DC PWM speed control, analog signal input speed control, manual speed potentiometer, so that you can adjust the flow and head, stuck with a three-phase DC pump protection, reverse access protection.

6, charge pump configured 4 or 6 threaded screw charge according to customer demand, to meet specific customer needs.

7, can be customized according to user requirements and in accordance with the requirements of customers to design fountain pumps.

Using conditions introduction of fountain pump

1. fountain pump should be completely immersed in running water, diving depth of not less than 0.5 meters, no more than 5 meters.

2. Environmental water temperature should be no higher than 40 ℃.

3. The working medium is non-corrosive water, sediment concentration is not more than 0.1%, PH value of 6.5 to 8.5.

4. Power should be a three-phase 50 Hz, rated voltage of 380 V, the supply voltage must ensure that within the range of 342 to 420 volts.

5. The fountain pump should be used within the scope of the rated lift nearby.

6. fountain pump should configure the appropriate start protection, reliable ground.

Fountain pump applications:

QSP fountain pump is mainly used for aquaculture and other places. Widely used low lift cities, farmland row irrigation, sprinkler irrigation, industrial and civil supply, drainage system, hills, mountains water, drain the water and the low-lying land.

22kw welpump fountain pump testing video

304 Stainless Steel Submersible Pump using condition

304 Stainless Steel Submersible Pump using condition:

1. 380V voltage deviation is no more than ±5%,frequency is 50HZ, three -phase power deviation is no more than ±1%.
2. Motor cavity must be filled with water.
3. The first stage impeller of the pump should be more than 2mm below the moving water surface, pump unit should be less than 70m below the static water level.
4. The distance from the motor bottom to well bottom must be more than 3m.
5. Water temperature should be no more than 20°C.
6. Sand content of the water ( by mass) should be no more than 0.01%.
7. PH value of water 6.5-8.5.
8. Hydrogen sulfide content of the water should be no more than 1.5mg/L.
9. Chloride ion content of the water should be no more than 400mg/L.
10. Water yield of water source should ensure the requirements of pump continuous working.

304 Stainless Steel Submersible Pump Application

304 Stainless Steel Submersible Pump Application:

Irrigation, drip irrigation, lift irrigation
Industry: cooling tower, high pressure
Domestic: high rise building, long distance puming,fountain, water parks, washer etc.

304 STAINLESS STEEL SUBMERSIBLE PUMP INTRODUCTION

304 Stainless Steel Submersible Pump

Flow: 10-500m3/h

Lift： 20-300m

Caliber： φ175~φ400mm

Power： 0.4-160KW

Temperate： <=20℃

Quality certificate：One year warranty and lifelong maintenance

Skype: welpump

Email：info@welpump.com

Service hotline: +86-021-57852396

If you don't understand 304 Stainless Steel Submersible Pump, and need guidance about model selection or want our technicist to select a suitable model for you, please email us.

How to take care of your submersible sewage pump?

Sewage pump is one of the centrifugal impurity pumps. It is mainly used to transport waste water in city, excrement, and fluids containing solid particles like fibers or paper scraps, etc. Generally, the fluids it pumps shall not be above 80℃. As the fibers in the fluids are easy to wind themselves together, the flow channel of this kind of pump is easy to be blocked. Once clogged, the sewage pump will not work normally and its motor may even be burned, leading to difficulty in sewage draining. Then, do you know how to take care of submersible sewage pump?

The following are a few common maintenance methods. You can save many troubles, avoid many problems when operating thesubmersible sewage pump if you follow the following guides.

1. Make sure the motor is rotating in a right direction

Be clear about the direction of rotation of the motor. Nowadays, many types of sewage pumps can pump water whether its motor is rotating forward or backward. But when it is rotating backward, it pumps out less water but costs stronger current. If it rotates backward for a long time, the motor winding may be damaged.

2. It is prohibited to start the machine when the power supply is abnormal.

The low voltage power supply circuit is very long. The voltage at the end of the circuit may often be very low. When the phase voltage is below than 198V and the line voltage below 342V, the motor of sewage pump will fall off in speed. If it rotates at less than 70% of the rated speed, the start-up centrifugal switch will be closed and the starter winding will become hot or even be born out together with the capacitor when they are charged with electricity for too long. On the contrary, if the voltage is too high, the motor will become overheat and the winding will also be born out. Therefore, when the sewage pump is working, the operator must always pay attention to the power supply. If the power supply is 10% below the rated voltage or 10% above the rated voltage, the operator should stop the motor and troubleshoot the problems.

3. Cable installation and insulation resistance requirement of submersible pumps

When installing sewage pumps, you have to build a aerial cable way. Do not make the power line too long. When the sewage pump goes down into water or gets out of water, never let the cable bear any force or it may break. Do not let the sewage pump sink into mud when it is working for fear of causing bad heat to the motor and burning the winding. During installation, the insulation resistance of the motor shall not be lower than 0.5 M Ω.

4. Electrical leakage protector installation

Electrical leakage protector is also called a life protector. You can see how important it is by its neck name. The sewage pump works under water. The electricity in it is easy to leak, causing electric energy loss or even accidents. If you install a leakage protector, it can cut off power supply for the sewage pump to ensure safety, prevent electricity leakage and electric energy wasting once the leakage value is above the action current value of the protector(normally less than 30mA).

5. Do not start up and power off too frequently

Do not start up the sewage pump or power it off too frequently. When the pump stops, the liquids will flow back a little. If you start it immediately after stopping, it will start with a load and the starting current will be so strong that the motor winding may be burned out. Besides, the starting current itself is also strong. If you start it too frequently, the motor winding will also be burned.

6. Do not let the sewage pump work overload for a long time

In order to prevent the sewage pump from working overload for a long time, do not use it to pump water containing much sands and always pay attention to the current value, check if it is same as the value regulated on the nameplate. If the current is too strong, please stop the pump for troubleshooting. Besides, the pump shall not work without water for too long. Otherwise, the motor will overheat and get burned.

7. Pay attention to daily maintenance

Take regular inspection on the motor. If you find cracks on its bottom cover, or the rubber seal ring is damaged or become ineffective, etc, please replace or repair it timely to prevent water from permeating into the sewage pump. Remember to use belay device of the submersible sewage pump and always pay attention to daily maintenance. In this way, the service life of submersible sewage pump will be well prolonged.

Article source: Shanghai Weihu(WEL) Pump Industry Co., Ltd.

Basic Knowledge about Sewage Pump

 

1. Sewage pump overview

With the progress of society, people’s living quality is becoming better and better. They also become more concerned about environmental protection and more acquainted with sewage pumps, which is being applied to more widely fields.

Sewage pump is a kind of non-clogging pump. It has many types, such as submersible type and dry type. The most common type of submersible pump at present is WQ model submersible sewage pump. The most common type of dry sewage pump is horizontal sewage pump and vertical sewage pump. Sewage pump is mainly used to deliver urban waster water, excrement, and fluids containing solid particles like fibers or paper scraps, etc. Generally, the fluids it pumps shall not be above 80℃. As the fibers in the fluids are easy to wind themselves together, the flow channel of this kind of pump is easy to be blocked. Once clogged, the sewage pump will not work normally and its motor may even be burned, leading to poor sewage, which has bad influence on city life and environment protection. Therefore, anti-blocking and reliability are two decisive factors for the quality of sewage pump.

2. Sewage pump structure

Same as other pumps, sewage pump is also composed of two main parts: impellers and pump chamber. The performance of there two parts decides the performance of the pump. The sewage pump’s anti-blocking ability, efficiency, aero corrosive resistance and anti-resistance ability are mainly decided by the impellers and the pump chamber. Below are details:

Impeller structure

There are four kinds of impeller structure: blade impeller(open, closed), spiral-flow type, channel impeller(include single channel or double channel) and screw-centrifugal impeller.

Pump chamber structure

Sewage pump generally uses volute chamber. Built-in submersible pump often use radial guide blade or channel guide blade. Volute falls into three types, spiral type, ring type and medium type. Spiral volute is almost not used in sewage pumps. With simple structure, ring chamber is easy to produce. It is mainly used in small sewage pump. With medium type(semi-spiral type) of volute turning up, the application range of ring chamber becomes narrow. Because medium type of chamber is as efficient as spiral chamber, and as permeable as ring chamber, it has attracted increasing attention from manufacturers.

3. Conclusion

In conclusion, all series of sewage pumps are combination of different types of impellers and different types of pump chambers according to the fluids to be pumped and installation requirement, etc. You can ensure pump performance with optimal configuration of impeller and chamber. Of course, the design and manufacture of other components cannot be neglected.

Shanghai Weihu Pump Industry Limited Company offers parameters for all models of submersible pumps, installation and operation knowledge.

IS/ISR/IY series single stage single suction centrifugal pump

Flow: 10-600m3/h

Lift： 5-150m

Caliber：

Power：

Temperate：

Quality certificate：One year warranty and lifelong maintenance

Skype: welpump

Email：info@welpump.com

Service hotline: +86-021-57852396

Product overview

IS, ISR, IY series single stage single suction cantilever type centrifugal pump is used to deliver clean water and liquids with similar chemical and physical properties as water but containing no solid particles. This series of pump is the first batch of pumps in China pump industry NEWLY designed according to international standard ISO2858. It has such features as wide range of parameters, high efficiency, good reliability, simple structure, easy to use and maintain, etc. It is chosen and promoted by Chinese government as energy saving product.

Product usage

IS type single stage single suction clean water centrifugal pump can deliver liquids with highest temperature at 80℃. The allowable pressure at inlet is 0.6MPa. It is suitable for water supply and water drainage in factories, mines, urban areas and farm irrigation, etc.
ISR single stage single suction hot water circulation pump can be used for pressurized water circulation supply in energy industry, metallurgical industry, chemical industry, bath room, boiler, city heating system. It can pump liquids with temperature as high as 130℃.
IY single stage single suction light oil pump is used to deliver gasoline, kerosene, diesel and other petroleum products.

Product features

(1)This series of pumps are installed horizontally, suspension type. The liquids is drawn in along horizontal shaft, drained out radially. Its body and cover are divided at its back. You don’t have to disassemble the pipeline as inlet and outlet when taking maintenance. You only need to take down the shaft coupling, withdraw the rotor components before maintenance.
(2) Two kinds of shaft sealing, soft packing seal and mechanical sealing.
(3) Seen from the end of motor, the pump rotates clockwise.

IS type centrifugal pump structure

This series of pumps are installed horizontally, suspension type. The liquids is drawn in along horizontal shaft, drained out radially. You don’t have to disassemble the pipeline as inlet and outlet when taking maintenance. You only need to withdraw the rotor components for maintenance. The pump is connected with the motor by common elastic coupling or lengthened elastic coupling. The shaft of the pump is sealed with soft packing sealing. The bearings are single row radial ball bearing, lubricated by lubricating oil.

IS type centrifugal pump’s direction of rotation

Seen from the end of motor, the pump rotates clockwise.

IS type centrifugal pump’s parts main material

Liquids passing parts are generally made of common gay cast iron.

IS type centrifugal pump’s scope of delivery

We supply pump, motor, common base plate, coupling, etc., as a complete site. Besides, we also supply bottom valve, check valve and brake valve.

4SP Stainless steel well submersible multistage electric pump

Product Oview

4SP type stainless steel multistage deep well submersible pump is a new high-grade machine for getting underground water. It is widely used for water supply and discharge in industrial and mining enterprises, for farm land irrigation, for getting underground water for private use. The main parts of the pump are all made of stainless steel and copper alloy, so has such features as anti-corrosion, wear resistance, energy-saving, high efficiency and fully reliable. Besides, as it has compact structure, small and light, it is easy to maintain, transport, install and use. When used in combination with automatic energy-saving high efficiency control box, it can be protected against over temperature, short circuit, over load and under voltage, safe and reliable to use.

Application range

Water supply system
Boost
Agricultural irrigation
All kinds of industrial purposes

Working Condition

1.Solid matter in water shall not be over 0.01% (weight ratio);
2.Chemical substances content in water shall not be over 1.5mg/L;
3.Ion content in water shall not be above 400mg/L;
4.Water PH value: 6.5~8.5;
Voltage: three-phase 380V±10%, single-phase 220V±10%;
Motor power: single phase 0.37KW—2.2KW, three-phase 0.55KW—7.5KW.

Product features

1. Full lift structure
2. All stainless steel anti-corrosive structure
3. High lift, large flow, energy-saving
4. New “float type”, no axial pressure force
5. Excellent performance in pumping water with sands; impeller and discharge bowl are made of wear resistant material.
6. The pump and the motor matches well with corresponding sizes. You can assemble or change them freely.
7. Pressure balance film, can reach as deep as 120m under water.

Paramter

Motor：
Max flux: 20m3/h
Accord with NEMA standard
Insulation grade: B
Protective grade: IP68
Max external diameter: Ф95mm
Max liquid temperature: 35℃