The NL sewage cement slurry pump is a single-stage single suction vertical centrifugal pump, consisting of main components such as volute, 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 convenient processing technology. The impeller consists of three single chord curved blades, which are semi enclosed and made of malleable cast iron, resulting in high strength and corrosion resistance; Easy processing, good passability, and high efficiency. In order to reduce weight and cutting volume, the pump shaft is made of high-quality carbon steel cold drawn round steel. The sewage mud 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 small mud pump can be used vertically or obliquely, with a small footprint. The volute needs to be buried in the working medium for easy start-up, without the need for water intake. The rotation direction should be clockwise when viewed from the tail of the motor. There are various specifications for the length of the switchboard, so that users can choose according to their specific needs.

1. NL type mud pump is used in mining, papermaking, printing and dyeing, environmental protection, graphite, mica, gold, ceramics, oil refining, petroleum, chemical industry, farms, salt fields, iodine fields, dyeing, brewing, food, fertilizer, coking plants, construction, marble plants, gold mines, mud, quicksand, mud ponds, sewage ponds, polluted liquids for conveying and absorbing thick slurry, loading and suspended solids in sewage operations. It can also be used for coal mine drainage and fluids containing mud blocks.

2. If a vertical mud pump is combined with a high-pressure water pump and a water gun 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 chiseling of rivers and ponds, as well as urban air defense projects.

3. Fish farming is used for carrying water to clear ponds, increasing oxygen in fish ponds, etc.

（1） Dismantling

1. Dismantle the electric tilt or surface fixing plate, and the water outlet pipe.

2. Disassemble the snail shell and impeller butterfly, gently expand the back of the impeller, and remove the key impeller.

3. Remove the driven half coupling, then remove the key, and finally disassemble the motor base to separate it 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 layer of thin butter on both sides of all paper pads, and add two-thirds of the butter 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 a 0-type sealing ring 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.

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 that match the motor nearby? Turn off 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 rotation direction of the motor must be checked and must not be reversed for more than one minute.

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 suction after absorbing mud and other pollutants, in order to flush the pump body and the interior of the pipeline.

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 suction mud at the bottom of the pool should be hung 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 high-pressure water should not exceed one-third of the suction inlet.

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

8. This pump reduces the load when pumping thick mud, thick liquids, or high lift, long-distance mud, but cannot increase the load 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.

1. Please provide the diameter, head (m), flow rate (m ³/h), motor power (KW), speed (r/min), voltage [V], and material of the sewage slurry pump. Please let us know if the sewage slurry pump comes with accessories so that we can make the correct selection for you.

2. If the design unit has already selected our company's sewage slurry pump product model, please order directly from Longyang Pump Valve Sales Department according to the sewage cement slurry pump model.

3. When the usage situation is very important or the environment is complex, please provide design drawings and detailed parameters as much as possible, and our Longyang pump valve technical experts will review and control them for you.