PWDDFL vertical submersible sump pump

Overview of PWDDFL series multi suction submersible sewage pump products

1. Can be used for coal washing pits in thermal power plants, and for discharging high concentration coal slag containing wastewater.

2. It can be used in industries such as municipal, chemical, printing and dyeing, medicine, shipbuilding, casting, and food to extract thick liquids, polluted liquids, paste like bodies, flowing sand, and flowing sludge from urban rivers. It can also be used in coal mines to remove fluids containing mud blocks and small gravel.

3. If combined with high-pressure water pumps and water guns to form a hydraulic mechanized earthwork unit, it can be used for excavation and transportation of small water conservancy projects such as land leveling, dredging and excavation of rivers and ponds, as well as urban air defense and underground engineering.

4. Used for wastewater containing high concentration of iron oxide scale in the iron oxide pit of smelting plants.

Product structure of PWDDFL series multi suction head submersible sewage pump

This pump is a single-stage single suction vertical centrifugal pump. The fluid flows out along the axis of the pump shaft at a 70 ° angle. The main components include the volute shell, impeller, pump seat, pump casing, support cylinder, motor seat, and electric motor. The snail shell, pump seat, motor seat, and impeller nut are cast from pig iron, with good corrosion resistance and easy processing technology.

The impeller is a three piece single chord curved blade, using a semi enclosed impeller and malleable cast iron, so it has high strength, corrosion resistance, easy processing, good passability, and high efficiency. The three single circular impeller can effectively serve the mixing function, replacing the traditional mixing head structure, reducing the shaft power of the water pump, and saving the cost of motor matching and electricity.

The design of removing the suction head support has strengthened the passability of plastic bags and other fiber strips.

In order to reduce weight and cutting volume, the pump shaft is made of high-quality carbon steel cold drawn round steel.

The pump seat is equipped with four skeleton oil seals and shaft sleeves to prevent shaft wear and extend the service life of the shaft.

This pump can be used vertically or obliquely, with a small footprint. The volute shell needs to be buried in the working medium for easy start-up and does not require water intake. The rotation direction should be clockwise when viewed from the rear of the motor. There are various specifications for the length of the switchboard, so that users can choose according to their specific needs.

Instructions for using PWDDFL series multi suction submersible sewage pump

1. The power supply used for this pump must be three-phase four wire system. If there is no grounding wire, it must be installed to prevent leakage. When working, it is necessary to install circuit fuses and switches that match the motor nearby to prevent the motor from being burned out when debris gets stuck in the impeller.

2. This pump can operate without installing any basic equipment when in use, as long as it is firmly inclined and tied with ropes if necessary to prevent accidents. After starting, the motor rotation direction must be checked and must not reverse for more than - minutes.

3. When the liquid being sucked contains a lot of weeds, iron wires, wooden strips, bricks and other debris, it must be removed as much as possible in advance, and methods such as adding wire baskets can be used to prevent debris from being sucked into the pump, causing accidents such as impeller damage, jamming and pipeline blockage.

4. The pump body should be given short-term water suction after absorbing concentrated slurry and other pollutants, in order to flush the pump body and pipeline interior.

5. When working outdoors, the motor should be equipped with a protective cover to prevent rainwater and other substances from entering the motor.

6. At the bottom of the river, the bottom of the pond should be suspended on a tripod and can be moved on a float or boat for operation. During earthwork operations, the diameter of the soil blocks crushed by the high-pressure water gun should not exceed one-third of the suction port.

7. The specified speed of this pump is the maximum speed of the pump and cannot be arbitrarily increased; The use of reducing the speed is not limited, but the effectiveness is significantly reduced.

8. When this pump is used to suction thick mud, thick liquids, or high head coal slurry for long-distance transportation, the load decreases, but the load cannot be increased by changing the structure.

9. Normally, after running for about 1250 hours, regular maintenance of the pump should be carried out. The pump seat should be disassembled to check the bearings and the sealing condition of the pump. The grease should be cleaned and replaced, and if necessary, the oil seal, shaft sleeve, and other parts should be replaced. Please refer to the installation for maintenance and replacement of parts precautions. (Use mechanical seals to run the pump for about 3500 hours for regular maintenance).

10. When the use is stopped for a long time, the snail shell should be disassembled, the parts should be wiped dry, and a thin layer of oil should be applied to the relative motion joint surface. It should be stored in a dry place for future use.

Disassembly and installation of PWDDFL series multi suction head submersible sewage pump

（1） Dismantling

1. Disassemble the motor or fixing plate, and remove the water outlet pipe.

2. Disassemble the snail shell and impeller nut, gently pry the back of the impeller, and remove the key impeller.

3. Dismantle the driven half coupling, then remove the key, and finally detach the motor base from the support cylinder.

4. Remove the pump seat and support cylinder bolts to separate them.

5. Remove the shaft sleeve and bearing from the shaft.

（2） Installation

1. Inspect all parts for defects, apply a thin layer of grease on both sides of all paper pads, and add two-thirds of the grease inside the bearings.

2. The skeleton oil seal must be filled with butter and placed in the pump seat before installing the bearings.

3. Install an O-ring seal inside the shaft sleeve and apply butter.

4. Install the bearing on the motor base, place a paper pad and oil stopper ring, install the shaft and support cylinder, and fix them with screws.

5. Put on the paper pad, install the bearing, shaft sleeve, key, pump seat, and impeller, tighten the impeller nut, and rotate the impeller by hand until it rotates flexibly.

6. Place a paper pad onto the pump casing, secure it with screws, and install the filter screen. Then pull the impeller by hand and rotate it flexibly.

7. Install the key and the driven coupling on the pump shaft, and install the key and the active coupling on the motor shaft. Then fix the motor to the motor seat bolt. After installation, it is required that the axial clearance between the active coupling and the passive coupling should be 1-1.5 millimeters.