WL Series Vertical Sewage Pump(7.5KW Less Than)
WL series small vertical sewage pump is the second generation new product developed based on the original vertical sewage pump. It adopts a non-blocking pump body and impeller, and is equipped with a vertical motor. The pump and motor are directly connected. It is suitable for installation in dry pump rooms. It has the advantages of simple structure, easy maintenance, high efficiency, safety, reliability, and long life. It is suitable for discharge It has unique advantages in sewage containing solids and long fibers.
It is recommended that users configure the electric control cabinet and liquid level float switch professionally developed by our company, which can not only realize automatic control, but also ensure the safe and reliable operation of the motor.
WL Series Vertical Sewage Pump
Dry pump room installation, easy maintenance
Installed in a dry pump room, vertical structure, small footprint, simple structure, easy to maintain, efficient, safe, reliable and long life
Reasonable structural design and strong pump reliability
The pump is directly connected to the motor, the bearing configuration is reasonable, the impeller cantilever is short, the pump runs smoothly, and the vibration and noise are small.
Unique dual-channel impeller with strong passing capacity
Non-clogging pump body and impeller, most suitable for discharging sewage and waste
Can be equipped with electric control cabinet and liquid level float switch
Ensure the safe operation of the motor and automatically control the start and stop of the pump without the need for special supervision
- Features and usage advantages
- Model description
- Structure diagram
- Materials of main parts of pump
- Installation legends and instructions
- Technical description
- The uniquely designed double-channel impeller and spacious pump body make it easy for solid objects to pass through and the fibers are not easy to get entangled. It is most suitable for discharging sewage and waste.
- The sealing chamber adopts a spiral structure design, which can prevent impurities in the sewage from entering the machine seal to a certain extent; the sealing chamber is also equipped with an exhaust valve device. After the pump is started, the air in the sealing chamber can be eliminated to protect the machine. The purpose of sealing is to extend the service life of the mechanical seal.
- The pump has a vertical structure and occupies a small area; the impeller is directly mounted on the motor shaft without a coupling. The overall size of the pump is short, the structure is simple, and it is easy to maintain; reasonable bearing configuration, short impeller cantilever, and superior shaft The force-balanced structure makes the bearings and mechanical seals more reliable and have a longer life, and the pump runs smoothly with little vibration and noise.
- The pump is installed in a dry pump room for easy maintenance.
- According to user needs, it can be equipped with an electric control cabinet and a liquid level float switch. It can not only automatically control the start and stop of the pump according to changes in liquid level, without the need for special supervision, but also ensure the safe and reliable operation of the motor, making it extremely convenient to use.
| Parts | Pump body, impeller | Base Motor base | Shaft | Machinery Seal | |||
| Friction pair | Spring | Rubber parts | |||||
| Material | Generally it is HT200 (GB9439-88). If the user requires, ductile iron (GB1348-88) can be used. | HT200 (GB9439-88) |
2Cr 13 3Cr 13 (GB1220-84) |
Graphite/Silicon Carbide | Silicon carbide/silicon carbide or silicon carbide/tungsten carbide | Stainless steel | Nitrile rubber |
- The installation method of the vertical sewage pump produced by our company is generally the lateral suction method.
- ▼ indicates the lowest liquid level. This liquid level ensures that the air in the pump can be drained before starting; the second is to ensure that no air is sucked in during operation; and the third is to ensure that cavitation does not occur when pumping higher temperature sewage.
- Before installing the pump, the cement base should be prefabricated, and there should be a groove in the middle of the base to accommodate the suction elbow.
- The suction elbow and its fasteners with the pump are provided by our company as a necessary complete set of supply parts. Anchor bolts must be prepared by the user or ordered separately from our company. When users need to install elbow pipes at the pump outlet, they can order separately from our company. When users need gate valves, they can also order additional ones from our company. It is recommended to purchase our company’s electric control cabinet and liquid level float switch.
- The flange dimensions in the installation diagram represent the discharge flange of the pump and the suction end flange of the suction elbow.
The setting of the float switch in drainage situations is as shown in the figure below:
Rated voltage, rated frequency:
The rated voltage of the WL type vertical sewage pump motor is 380V and the rated frequency is 50Hz.
turn around:
Viewed from the pump suction port, the impeller rotates counterclockwise.
Description of performance curves and main parameters:
Example 1(WL2130-242)
| Pump model | Flow channel size (mm) | Motor ratedPower (kW) | Rotating speed(r/min) | The unit is heavy (kg) |
| WL2130-242 | Oval 31×39 | 1.5 | 2840 | 76 |
The solid line part of the performance curve of Example 1 indicates the recommended use range of the pump. When the range is exceeded, the efficiency of the pump is very low or the motor is in danger of being overloaded. If the flow rate of the pump exceeds the limit on the right, the shaft power may exceed the rated power of the motor. When the medium temperature is high or the motor is not sufficiently cooled, the motor cannot work for a long time.
For all vertical sewage pumps, when the flow rate is less than the left limit, the shaft power of the pump is far lower than the rated power of the motor, and the unit efficiency is very low. In this case, it is very uneconomical to use a pump.
The diameter of the solids in the medium should not be larger than the minimum size of the flow channel, and it is recommended to be less than 80% of the minimum size of the flow channel. As shown in the figure, for the WL2210-476 pump, the diameter of the solids should not be larger than 55mm. The weight of the unit includes the weight of the base and the suction elbow.
WL series small vertical sewage pumps are mainly used in municipal engineering, building construction, industrial sewage and sewage treatment. They can be used to discharge sewage, wastewater, rainwater and urban sewage containing solid particles and various long fibers.
- The medium temperature does not exceed 80°C, the ambient temperature does not exceed 40°C, the medium density is ≤1050 kg/m3, and the PH value is within the range of 5 to 9.
- Minimum operating liquid level: See ▼ in the installation dimension diagram.
- The main parts of the pump are made of cast iron or ductile iron, so it cannot be used to pump highly corrosive liquids or media containing highly abrasive solid particles.
- The diameter of solid matter in the medium should not be greater than 80% of the minimum size of the flow channel. For the flow channel size, please refer to the “Main Parameters” column of each pump specification.
In order to make the pump you choose more suitable, users are warmly welcome to consult the company’s technical department for technical issues.
When ordering, please indicate: serial number, impeller number, flow parts material, and discharge diameter.
Vertical sewage pumps are generally installed with side suction. It is not recommended to use the vertical suction installation method (that is, the pool is below the pump), because when using the vertical suction installation method, it is not suitable to install a bottom valve as a sewage pump. If a bottom valve is not installed, a vacuum pump must be used to divert water, which is inconvenient for users. . Optional parts and spare parts must be ordered separately by the user.
Optional parts and spare parts list
| Optional parts | Electric control cabinet, liquid level float switch, elbow, anchor bolt, gate valve, sling |
| Spare parts | Impeller, sealing ring, bearing, mechanical seal |
Elbow pipe is used to connect the discharge end of the pump and the bend of the water outlet pipe.
Elbow size chart
| Caliberφc | φ b | φ a | nφd | L | b |
| 50 | 110 | 140 | 4-13.5 | 105 | 16 |
| 65 | 130 | 160 | 413.5 | 130 | 16 |
| 80 | 150 | 190 | 4-17.5 | 155 | 18 |
| 100 | 170 | 210 | 417.5 | 160 | 18 |
| 150 | 225 | 265 | 8-17.5 | 220 | 20 |
| 200 | 280 | 320 | 8-17.5 | 270 | 22 |
Anchor bolts for fastening the base
| Pump model | Anchor bolts(GB788-88) | |||
| Serial Number | Impeller number | Specification | QTY | Reserved hole reference size |
| Length×width×height | ||||
| 2120 | 240、249 | M16×220 | 4 | 80×80×270 |
| 2130 | 241、242、243、244、247 | |||
| 2155 | 251、261、470、477 | |||
| 2175 | 248、260、472 | |||
| 2210 | 245、250、246、252、473、478、 475、476 |
|||
Gate
| Nominal pressure | Nominal diameter | Size | |||
| D | D1 | D2 | n-φd | ||
| 1.0MPa | 50 | 165 | 125 | 102 | 4φ17.5 |
| 65 | 185 | 145 | 122 | 4φ17.5 | |
| 80 | 200 | 160 | 133 | 8-φ17.5 | |
| 100 | 220 | 180 | 158 | 8-φ17.5 | |
| 125 | 250 | 210 | 184 | 8-φ17.5 | |
| 150 | 285 | 240 | 212 | 8-φ22 | |
| 200 | 340 | 295 | 268 | 8-φ22 | |
Install
- Before installation, check whether the pump and motor are damaged, and check the tightening of fasteners.
- The weight of the pipeline should not be added to the water pump to avoid deformation of the pump.
- The anchor bolts must be tightened during installation.
- After installation, turn the motor fan blades. There should be no friction sound or stuck phenomenon in the impeller.
Start up
- The liquid level shall not be lower than the minimum liquid level when starting. The minimum liquid level is shown as ▼ in the installation diagram.
- Jog the motor and check the steering. Viewed from the top of the motor, it should rotate clockwise.
- Close the valve and pressure gauge on the outlet pipeline.
- Open the exhaust valve, start the motor, and turn on the pressure gauge. After the speed is normal, slowly open the outlet pipe valve to the required flow rate. Note: Do not turn the valve with the valve closed for a long time. After the air at the exhaust valve is exhausted or water overflows, close the exhaust valve.
Parking
- Slowly close the outlet gate valve, close the pressure gauge, and stop the motor.
- When parking for a long time, the pump should be removed, cleaned and reinstalled, and properly kept.
Maintain
- The use and maintenance of the motor should be carried out according to the instruction manual of the motor.
- Check the motor current value regularly. When the ambient temperature is the rated temperature of the motor, the current must not exceed
The rated current of the motor. When the ambient temperature is lower than the rated temperature of the motor, the current can be increased appropriately. Please refer to relevant information for the specific increased value. When the current is abnormal, the cause should be identified.
- After the pump has been running for a long time, if the noise and vibration of the unit increase due to mechanical wear, it should be stopped for inspection.
Check and replace wearing parts or bearings and mechanical seals if necessary. The overhaul period of the unit is generally one year. Under normal use conditions, the cumulative life of the mechanical seal is more than 8,000 hours.
| Fault | Reason | Method of exclusion |
| The pump does not discharge water or the flow rate is insufficient | 1. Motor reverse rotation 2. The impeller flow passage is blocked 3. The device head is too high 4. Pipeline resistance is too large |
1. Exchange the phase sequence of the two-phase power supply 2. Eliminate clutter 3. Switch to a high-lift pump or reduce the device lift. 4. Reduce pipeline bends and increase the pipe diameter for long pipelines. |
| Lift is not enough | 1. There is gas mixed in the medium 2. The impeller is severely worn |
1. Eliminate gas 2. Replace |
| The discharge pressure fluctuates greatly | 1. The liquid level in the suction pool is too low 2. The suction elbow is not tightly sealed, causing the pump to suck in air 3.High medium temperature |
1. Control the minimum liquid level of the suction pool 2. Check the gasket to eliminate air leakage problems 3. Reduce the medium temperature; if the medium temperature cannot be reduced, increase the minimum liquid level of the suction pool. |
| Too much power | 1. The flow rate is too large and exceeds the usage range. 2. The medium density is too high 3. Produce mechanical friction |
1. Turn off the valve 2. Dilute the medium; if the medium cannot be diluted, the valve should be closed 3. Carry out maintenance and adjustments to eliminate friction. |
| Bearing heat | 1. Bearing wear 2. Too little or too much bearing grease 3. Bearing oil or grease deteriorates |
1. Replace bearings 2. The filling amount of grease should be 1/3 to 1/2 of the clearance in the bearing cavity; fill more for low speed and less for high speed. 3. Change oil or grease |
| The pump is making noise or vibrating | 1. There is gas in the medium 2. Impeller wear makes the rotor unbalanced 3. Bearing damage 4. The pump outlet suddenly shrinks 5. The suction elbow is not tightly sealed, causing the pump to suck in air 6. The liquid level in the suction pool is too low 7. Medium temperature is high |
1. Eliminate gas 2. Replace the impeller 3. Replacement 4. Use delivery pipes of the same diameter as much as possible, otherwise the reduced pipe should be far away from the outlet of the pump 5. Check the gasket to eliminate air leakage problems 6. Control the minimum liquid level of the suction pool 7. Reduce the medium temperature; if the medium temperature cannot be reduced, increase the minimum liquid level of the suction pool. |