Industrial Submersible Pump

YYWQ series industrial submersible pump is primarily used for discharging domestic water, sewage, rain and waste water accompanied with solid particles and various long fiber in such areas as industrial sewage disposal, mining, hotels, hospitals, municipal engineering, building construction, civil air defense projects and so on.

By adoption of unique mechanical seal way and bearing arrangement, this industrial submersible pump features excellent reliability. Thanks to the CFD technical design, it can be more efficient. Moreover, our product is remarkably characterized by low noise, environmental protection, small size, tight structure, light weight as well as convenient installation and maintenance. The flow of our device ranges from 10 to 6000 m3/hr, and its head ranges from 3m to 62m.

(See the attachment for the model and relevant parameter)
Industrial Submersible Pump

Structure Explanation
By adoption of imported NSK bearing of reasonable configuration, we can extend the service life of the pump.

Whether the motor is on or under the liquid surface, the cooling system built inside can make the pump normally work. Besides, part of the liquid is extracted to bring out the beat produced by the motor from the pump circulation to the cooling barrel and to the pump casing. When external cooling is required, the cooling sleeve may be separated from the pump casing and individually connected to the cooling system.

The motor is of F class insulation with its maximum working temperature of 155 degrees C. With the help of the effective seal, the motor protective grade reaches IPX8.

Mechanical seal
We use Bogman mechanical seal of Germany. Two ways of the seal are in series with each other and individually work to separate the motor from the pump seal in order to provide the motor with a dual protection.

Oil chamber
By preventing liquid from penetrating into the motor, oil can lubricate and cool the mechanical seal and realize the attached function of safety. The air of a certain amount left inside the chamber can lower accumulative raise of the pressure.

Through the optimized design, the impeller will not be blocked up when it transports liquid with its optimum flow and rate and the maximum efficiency. There are suitable impellers at choice for every point of working condition. Furthermore, single channel, dual channel and three blade impellers are available for your choice.

Pump casing
We utilize the technology of CAD and CAM to make the pump casing possess maximum efficiency and minimum abrasion.

The pump is coaxial with the motor. The sealing device on the end of the shaft can prevent against contacting with the medium to protect it from corrosion. The stretched rotating shaft is short enough so that its deflection and vibration can be reduced. Also, we can extend the duration of both mechanical seal and bearing and lower the noise at running.

Monitoring system
Inside the stator there are three inlaid series heat control switches, which are in the state of normal close at the normal temperature and opened when the temperature on the stator gets to 125 ℃.
A water leakage probe is mounted inside the oil chamber to check water leakage and it will give a warning signal, when the mechanical seal on the pump side leaks and the oil water ratio in the oil chamber reaches a certain concentration. Thus, the power can be automatically cut off to stop the work of the pump.
Serviceman should replace the oil timely and check the mechanical seal on the pump side and replace it if necessary.
All the wiring box of the motor with a power not less than 30kW is mounted with a leakage probe to check if a leak with the cable seal.

Float switch
The float switch will give a warning signal, when leakage occurs on the mechanical seal on the motor side. At the same time, the liquid goes into the switch room and reaches a certain height so as to stop the pump. Serviceman should check the mechanical seal and replace it if necessary.

Conditions of Use
Medium temperature ≤40℃
Medium density ≤1200kg/m3
Minimum liquid level for operation You had better consult the related description about motor cooling system in installation diagram.
Rated voltage 380V
Rated frequency 50Hz
Deviation of both rated voltage and rated frequency for normal operation ≤±5%
Maximum diameter of solid particles It must be no more than 50 percent of the pump outlet diameter.

Use, Check and Maintenance
1. Cautions

It is not reasonable to use the pump in a medium environment easy to explode and burn and to extract any combustible liquid. Besides, you are strictly prohibited to impact or press the cable and use it as a lifting rope. When the pump is running, you are not allowed to pull it at will to avoid damage, which may result in an electric shock, or lowering the cable leak tightness, or the insulation performance of the wiring box of the motor.

When using the way of fixed automatic coupling installation, you had better lift or lower down the pump with the lifting chains locking the handle and take care to handle it.

The pump has to be vertically lifted when it is placed in water with no allowance for horizontally landed. Furthermore, our product can not be sunk into sludge. A flow regulating valve must be equipped with the spitting pipeline to avoid overload of the motor due to a too heavy flow.

2. Inspection before use
Carefully check is necessary if there is any deformation or damage with the pump and any looseness or falling off with the fasteners during transport, storage and installation.
You should check the cable in case of any damage or fracture, or the incomplete seal on its inlet intact. If any possible leakage or bad seal is found, a proper treatment in time is a must.

Then, you might as well measure the dielectric resistance between the phases and between the phase and ground with a 500V meg ohm meter, the value of which has not to be lower than 2 meg ohm, otherwise a drying treatment must be taken for the stator winding of the motor with a temperature not over 120. Also, you can notify the manufacturer for help.

You should check if there is oil in the oil chamber and do not stop filling it until it overflows on the filler. Moreover, the screw cork and sealing pad on the oil chamber must be full and the screw cork must press the sealing pad tightly. The impeller should rotate flexibly.

After that, you had better check if the power device is safe, reliable or normal and if the grounding wire inside the cable reliably grounded.

Before placing the pump in the pool, you should ensure that it is in a correct by way of dot moving. If the direction of rotation is wrong, you should cut off the power at once and change the U,V, W three wires with any two of which in the electric control cabinet.

3. Starting
You might as well close the flow regulating valve on the spitting pipeline at starting and gradually open it when the pump gets in the full speed running. You should note that the pump can not run for a long time with the valve closed.

4. Stopping
When you intend not to use the pump for up to half a month, you should lift the pump, clean it and place it in a dry place. When the temperature is very low, you can lift it out of the water and let the liquid inside it drain out to prevent it from being frozen.

5. Regular inspection
You should periodically check the dielectric resistance between phases and between phase and ground, the value of which should not be lower than 2 meg ohms, otherwise it has to be removed to overhaul. Meanwhile, you might as well check if the grounding is secured and reliable. The seal ring must be replaced with a new one when the maximum interval of it, mounted on the impeller neck and pump casing, is over 2mm.

After half a year running of the pump under the provided working medium condition, you should check the state of the oil chamber and replace it with N10 mechanical oil if it shows emulsified state. If the leakage probe gives a warning with the pump running for a short time, it is possible that the mechanical seal of pump side has been damaged and replacement at once is a must. When it is used under a very adverse working condition, it is more necessary for you to often check the pump.

After one year work of the pump under the normal working condition, a big overhaul must be taken for replacing the worn out parts. Also, you should check the fasteners and supply or replace the grease on the bearing so as to provide a good lubrication of the pump during its running.

If our product is required to be disassembled, knocking at it at will is not allowed in prevention of the damage to the seal. In addition, unskilled persons are prohibited to dissemble our product to avoid pump leakage or the damage to the motor.

Model Meaning

Direction of Rotation
By observing the pump suction inlet, we can find that the impeller rotational direction is counterclockwise.

Structure Explanation of Industrial Submersible Pump
1. Bearing is of imported NSK type. Reasonable bearing configuration can play an important role in extending the pump lifespan.
2. Cooling system installed inside the industrial submersible pump can make pump work normally, no matter if the motor is on or under the liquid level. By circulating, part of the liquid can take away the heat generated from the motor. If you want to cool the external pump, the cooling sleeve can be separated from the pump casing and then individually linked to the cooling system.
3. Motor is of F grade insulator with the maximum operating temperature of 155℃. Effective seal can make the degree of protection of the motor reach IPX8.
4. Mechanical seal is of German Burgmann band. Two mechanical seals connected in series can work independently, which can separate the motor from the pump seal and offer double protection to the motor. In addition, mechanical seal of our industrial submersible pump side is composed of tungsten carbide and the material of motor side is graphite and silicon.
5. Oil chamber serves to lubricate and cool the mechanical seal. Also, it can provide additional security function of preventing liquid from spilling over into the motor. Besides, a reasonable amount of air left inside the oil chamber can offer a positive effect to lower the accumulative rise of pressure.
6. Impeller of our industrial submersible pump has been optimized to transport the liquid without blockage with its best flow and speed and the highest working efficiency. Each operating point has its available impeller for option. In accordance to different media, distinct types of impeller can be available for option, including single channel type, double channel type and three blade type.
7. Pump casing is produced by adoption of CAD and CAM technology, which possesses the highest efficiency and the minimum abrasion.
8. Shaft can be shared by both pump and motor. On the end of the shaft, there is seal device, so the shaft can guard against corrosion in no contact with the media. Furthermore, the shaft must be short enough to reduce its deflection, vibration and noise and also prolong the service life of both mechanical seal and bearing.
9. Monitoring system of this industrial submersible pump involves three heat control switches embedded in the stator. When the stator temperature reaches 125℃, these switches can be opened.
Besides, the water leakage probe is installed in the oil chamber for leakage inspection. Once the mechanical seal of pump side appears leakage and the oil water ratio in the oil chamber reaches a certain concentration, the oil water probe will send out alarm signal and the power supply will be automatically cut down to stop the pump from working.
The maintenance personnel should timely replace the oil and check if the mechanical seal of pump side needs to be changed. It is also necessary to detect whether there is leakage in the cable seal. The motor power must be no less than 30kW and the leakage probe should be mounted in all wiring box.
10. Float switch can deliver the alarm signal and stop the industrial submersible pump when leakage of the mechanical seal of motor side makes the liquid entering into the switch room reach a certain height. At this time, maintenance personnel should examine and replace the mechanical seal of motor side. Moreover, the electric control cabinet can provide the function of detecting whether the motor lacks phase in prevention of burning the motor.

WQ Type Structure Drawing
1. Main cable platen
2. Connecting terminal
3. Bearing
4. Shaft
5. Motor
6. High quality angular contact ball bearing
7. Mechanical seal of motor side
8. Oil chamber
9. Impeller
10. Pump
11. Seal ring
12. Control cable platen
13. Grease probe
14. Case cooling drum can be set if the power is over 11kW.
15. Mechanical seal of pump side
16. Float switch

Spectrogram of WQ Type Pump
Spectrogram of WQ Type Pump

B-TOHIN is an experienced municipal submersible pump manufacturer in China. Apart from water pump, we also offer roots blower, water treatment equipment, low noise rotary blower, centrifugal fan, and much more.

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