How to solve the self-priming sewage pump failure

In the daily use of high intensity among the ordinary self-priming sewage pump will inevitably fail, then the common self-priming sewage pump failure which? In the event of failure, how should we exclude it? Down the company's water pump experts to tell you how to solve the self-absorption sewage pump failure.

First, self-priming sewage pump motor does not rotate

(A). Reason:

1 .motor is damaged;

2. power is blocked;

(B). Exclusion method:

1. Repair or replace the motor;

2. Check that the power is on.

Second, the pump is not a liquid

(A) reasons:

1. insufficient drainage;

2. Suction end of a flange, a large number of valves or piping leakage;

3. Drainage port or discharge port fight cap is not tight, or no fight washer inside the gasket;

4. There is no liquid in the container or liquid pool.

(B) the exclusion method:

Check one by one, for exclusion.

Third, self-absorption sewage pump process, head (pressure) is not up to standard

(A) reasons:

1. Voltage is too low, the rated speed of less than;

2. Motor reversal;

3. Bottom filter plug, over-current shortage;

4. Suction end of a flange, valve or somewhere pipeline chronic air leakage, affecting the pump vacuum;

5. Containers or liquid tank too little liquid, and sometimes inhale the air.

(B) the exclusion method:

Check one by one, for exclusion.

Fourth, self-priming sewage pump motor and pump connection parts leakage

(A) reasons:

1. Start instantaneous leakage, the phenomenon disappeared after normal operation;

2. Operation has been leakage (may be sealed device is damaged, or the actual head, pressure and pump parameters of the difference).

(B) the exclusion method

1. Drainage fluid perfusion over, not a fault;

2. If the sealing device is damaged, please consider repair or replacement: If the pressure parameter difference is too large, please consider the re-selection or adjustment of the pump pressure is too high, Actual working pressure.

Article source: http://www.welpumps.com/pump-knowledge/228.html

WQ-JY F type automatic blending sewage pump models and parameters

Weihu WQ-JY F type automatic blending sewage pump is a result of new high technology in Shanghai city, as well as a water pump product promoted by national standard atlas. To meet the demand of different clients from different areas, Weihu pump developed automatic blending sewage pumps of more models and with different parameters successively. Weihu WQ-JY F type automatic blending sewage pumps are precisely made from high quality materials. The flanges at the two ends outside of its stainless steel case are welded with argon arc, not easy to leak water or electricity. It adopts double mechanical sealing technology, has a long service life and low operation cost. It is packed according to export standard, effectively prevents damage from clicks in transportation. Compared with products of the same material from other factories, it has better cost-performance, and you can benefit much more from it. Besides, WQ-JY F type automatic blending sewage pump series also have the following characteristics:

1. Automatic blending. Weihu WQ-JY F type automatic blending sewage pumps have automatic blending blades inside. When the pump works, the blades will stir the sediments at the bottom of the pool; thoroughly prevent depositing of dirt, needing no artificial clearage.

2. Cutting sundries into pieces. The specially designed impellers of the automatic blending sewage pumps can cut fibers and sundries into pieces or tear them apart.

3. Longer service life. Automatic blending sewage pump adopts external circulation cooling system to make the pump work in lower water level, so that the motor doesn’t have to be started frequently, thus prolonging the service life of motor.

Weihu WQ-JY F type automatic blending sewage pump uses the best material, stable and reliable motor, 100% cooper core cable, human-friendly imported shaft, highly precise bearing from precision work. We use best material to make best products. If you are interested in our WQ-JY F type automatic blending sewage pumps series, please refer to the models and parameters in the following table and contact us.

Model	Flow quantity（m3/h）	Lift（m）	Power（kw）	Rotation speed（r/min）
WQ7-15-1.1-JY	7	15	1.1	2900
WQ15-7-1.1-JY	15	7	1.1	2900
WQ10-15-1.5-JY	10	15	1.5	2900
WQ25-7-1.5-JY	15	9	1.1	2900
WQ10-22-2.2-JY	10	22	2.2	2900
WQ35-7-2.2-JY	35	7	2.2	2900
WQ50-6-2.2-JY	50	6	2.2	2900
WQX15-25-3-JY	15	25	3	2900
WQ25-30-3-JY	25	30	3	2900
WQ50-10-3-JY	50	10	3	2900
WQ15-32-4-JY	15	32	4	2900
WQ25-25-4-JY	25	25	4	2900
WQ50-13-4-JY	50	13	4	2900
WQ60-10-4-JY	60	10	4	2900
WQ18-40-5.5-JY	18	40	5.5	2900
WQ30-30-5.5-JY	30	30	5.5	2900
WQ40-22-5.5-JY	40	22	5.5	2900
WQ65-15-5.5-JY	65	15	5.5	2900
WQ45-22-7.5-JY	45	22	7.5	2900
WQ100-10-7.5-JY	100	10	7.5	2900
WQ140-7-7.5-JY	140	7	7.5	2900

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.