NL type long axis submerged vertical sewage mud pump

1、 Product Overview:

NL type long axis submerged vertical sewage mud pumpIt is a single-stage single suction vertical centrifugal pump, with fluid flowing out in a 70 ° direction along the axis of the pump shaft. 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 wear resistance and corrosion resistance, and convenient processing technology. The impeller is made of three single chord curved blades, semi enclosed impeller, and malleable cast iron, so it has 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 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

2、 Application scope:
1. In rural areas, it is mainly used for the suction, transportation, and sprinkling of river mud, feces, river water, and slurry feed, replacing the shoulder and carrying people, and for drainage and drought resistance. It can also be used for the production of accumulated fertilizers such as riverbeds and river mud. It can also be used as a simple mobile fire pump in rural areas.
2. It can be used in industries such as municipal, chemical, printing and dyeing, pharmaceuticals, shipbuilding, casting, and food to extract thick liquids, corrosive 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 hydraulic projects such as land leveling, dredging and chiseling of rivers and ponds, as well as urban air defense and underground engineering.
4. Fish farming is used for carrying water to clear ponds, increasing oxygen in fish ponds, etc.

3、 Product features:
1. The wear-resistant parts of the overcurrent section are made of wear-resistant cast iron, which has a long service life.
2. The pump has the characteristics of compact structure, small volume, easy movement, and easy installation.
3. The pump is a vertical structure, and the pump body is immersed in liquid during operation, making it easy to start. There is no problem of exhaust and evacuation, and it also has the characteristics of no leakage. The depth of the liquid can be customized according to customer needs.
4. The coupling structure is advanced and reliable, and the pump and motor are connected by a coupling. The pump shaft size is precise, ensuring smooth operation of the pump with sufficient safety factor.

4、 Model meaning:
For example: NL150A-12
N-mud pump
L-Vertical
150 outlet diameter (mm)
A-Improved type (mechanical seal)
12 Head (m)

5、 Main performance parameters:

Model number	traffic	head	efficiency	power	speed
	m3/h	m	%	KW	r/min
NL50-8	20-30	8-9	42	1.5	1450
NL50A-8	20-30	8-9	42	1.5	1450
NL50-12	25-38	12-14	41	3	1450
NL50A-12	25-38	12-14	41	3	1450
NL65-16	50-60	15-18	42	5.5	1450
NL65A-16	50-60	15-18	42	5.5	1450
NL76-9	50-70	9-10	42	3	1450
NL76A-9	50-70	9-10	42	3	1450
NL80-12	80-120	11-13	56	7.5	1450
NL80A-12	80-120	11-13	56	7.5	1450
NL100-16	80-100	15-17	61	15	1450
NL100A-16	80-100	15-17	61	15	1450
NL150-12	100-150	11-13	66	18.5	1450
NL150A-12	100-150	11-13	66	18.5	1450
NL150-16	120-180	15-20	68	22	1450
NL150A-16	120-180	15-20	68	22	1450

6、 Precautions for use:

1NL type long axis submerged vertical sewage mud pumpThe power supply 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 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 blue 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 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. 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 running for about 1250 hours, regular maintenance of the pump should be carried out by disassembling the pump seat to check the sealing condition of the bearings and pump, cleaning and replacing the grease, and replacing the oil seal, shaft sleeve, and other parts if necessary. 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.