WLD series 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.

1. The medium temperature does not exceed 80℃, the ambient temperature does not exceed 40℃, the medium density is ≤1050kg/m³, and the PH value is within the range of 5~9.
2. Minimum operating liquid level: See √ in the installation dimension diagram.
3. 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.
4. The diameter of the 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.

1. Uniquely designed wide outlet, high-efficiency non-overload impeller, non-overload hydraulic design and the best balance of high throughput capacity. The flow channel is wide, solid objects can easily pass through, and fibers are not easy to get entangled. It is most suitable for discharging sewage and waste.
2. 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 and short impeller cantilever,

The superior axial force balance structure makes the bearings and mechanical seals more reliable and have longer service life. The pump also runs smoothly with little vibration and noise.

3. The pump is installed in a dry pump room for easy maintenance.
4. 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.

1. The installation method of the vertical sewage pump produced by our company is generally the lateral suction method.
2. “” indicates the minimum liquid level. This liquid level is first to ensure that the air in the pump can be drained before starting; secondly, to ensure that no air is sucked in during operation; thirdly, to ensure that cavitation does not occur when pumping higher temperature sewage.
3. 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.
4. 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 waste racks and gate valves, they can also order separately from our company. It is recommended to purchase our company’s electric control cabinet and liquid level float switch.
5. The flange dimensions in the installation diagram represent the discharge flange of the pump and the suction end flange of the suction elbow. All flanges with a diameter <400 shall comply with the GB/T17241.6 PN6 standard, and all flanges with a diameter ≥400 shall comply with the GB/T17241.6 PN10 standard.

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 WLD vertical sewage pump motor is 380V and the rated frequency is 50Hz. Direction of rotation: Looking down from the motor, the pump rotates clockwise.

The main parameters

Discharge diameter 100mm

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 WL2260D-2122 pump, the diameter of the solid object should not be larger than 41.6mm.

The weight of the unit includes the weight of the base and the suction elbow.

The main parameters

Discharge diameter 250mm

The thick line in the performance curve of Example 2 represents the prototype pump, and the thin line represents the pump with a small impeller. For example: WL2400D-4168 is a prototype pump, and WL2327D-4109 is a pump with a small impeller outer diameter. After the car has a smaller impeller, it is more adaptable to certain requirements and can also reduce or eliminate the risk of motor overload.

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. The vertical suction installation method (that is, the pool is below the pump) is not recommended because when the vertical suction installation method is used, 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. . Except for special requirements, the suction elbow and its accessories are standard accessories. Optional parts and spare parts must be ordered separately by the user.

Optional parts and spare parts list.

Bend pipe

Used to connect the discharge end of the pump and the turning point of the water outlet pipe

Elbow size chart

Anchor bolts

for fastening the base

sewage rack

Depending on the size of the pumping station, there are various series of automatic decontamination and mechanical decontamination (removing impurities on the sewage rack) for users to choose from, and the size needs to be determined on site. The picture below shows the grille decontamination machine.

1. Hydraulic system 2. Gantry frame 3. Garbage truck 4. Traveling device 5. Grab door
2. Grid 7. Safety device 8. Lifting device 9. Electrical control partMain specifications and technical parameters
   

   model		Grille specifications (mm)	derrick(m)	Gate spacing(mm)	installation angle	Motor Power
   GS	-1000	1000	2-12	20-1000	60°-70°,special   Used in situations90°。	Lifting motor 1.1-1.5kW, control motor 0.75kW, traveling motor 0.8/0.4kW (double speed).
   GSE
   GS	-1250	1250
   GSE
   GS	-1500	1500
   GSE
   GS	-1750	1750
   GSE
   GS	-2000	2000
   GSE

   gate valve

   

3. Nominal pressure	Nominal diameter	size
   		D	D1	D2	n-φd
   1.0MPa	50	165	125	102	4-φ17.5
   	65	185	145	122	4-φ17.5
   	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-中22
   	200	340	295	268	8-φ22
   	250	395	350	320	12-φ22
   	300	445	400	370	12-φ22
   	350	505	460	430	16-φ22
   	400	565	515	482	16-φ26
   	450	615	565	532	20-φ26
   	500	670	620	585	20-φ26
   	600	780	725	685	20-φ30

    

Install

1. Before installation, check whether the pump and motor are damaged, and check the tightening of fasteners.
2. The weight of the pipeline should not be added to the water pump to avoid deformation of the pump.
3. The anchor bolts must be tightened during installation.
4. After installation, turn the motor fan blades. There should be no friction sound or stuck phenomenon in the impeller.

start up

1. 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.
2. Jog the motor and check the steering. Viewed from the top of the motor, it should rotate clockwise.
3. Close the valve and pressure gauge on the outlet pipeline.
4. Start the motor and open the pressure gauge. After the rotation speed is normal, slowly open the outlet pipe valve to the required flow rate. Note: Do not operate with the valve closed for a long time.

parking

1. Slowly close the outlet gate valve, close the pressure gauge, and stop the motor.
2. When parking for a long time, the pump should be removed, cleaned and reinstalled, and properly kept.

maintain

1. The use and maintenance of the motor should be carried out according to the instruction manual of the motor.
2. 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.
3. After the pump has been running for a long time, when the noise and vibration of the unit increase due to mechanical wear, the pump should be stopped for inspection and vulnerable parts or bearings and mechanical seals can be replaced 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.