Nanfeng PMP100-7.5-4P Horizontal Centrifugal Pump Rural Domestic Sewage Treatment Equipment

main features

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1. Smooth operation: The absolute concentricity of the pump shaft and excellent dynamic and static balance of the impeller ensure smooth operation without vibration.

2. No leakage: Hard alloy seals made of different materials ensure no leakage when transporting different media.

3. Low noise: The water pump supported by two low noise bearings runs smoothly, with almost no noise except for the faint sound of the motor.

4. Low failure rate: The structure is simple and reasonable, and the key parts are equipped with world-class quality, greatly improving the fault free working time of the entire machine.

5. Convenient maintenance: Replacement of seals, bearings, simple and convenient.

6. More economical land occupation: The outlet can be arranged and installed in three directions: left, right, and up, which facilitates pipeline layout and saves space.

Water pump and classification

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Used for transporting clean water and other liquids with physical and chemical properties similar to clean water, suitable for industrial and urban water supply and drainage, pressurized water supply in high-rise buildings, garden sprinkler irrigation, fire pressurization, long-distance transportation, HVAC refrigeration cycle, bathroom and other cold and warm water circulation pressurization and equipment matching, with a usage temperature of t ≤ 80 ℃.

Widely applicable to: metallurgy, chemical industry, textile, papermaking, hotels and other boiler hot water pressurized circulation transportation and urban heating systems, ISWR type with a temperature t ≤ 120 ℃.

It is used to transport liquids without solid particles, which are corrosive and have viscosity similar to water. It is suitable for petroleum, chemical industry, metallurgy, power, paper making, food and pharmaceutical, Synthetic fiber and other departments. The operating temperature is -20 ℃~+120 ℃.

Transporting gasoline, kerosene, diesel and other oil products or flammable and explosive liquids, with a medium temperature of -20~+120 ℃. [1]

Product Usage

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1. Pipeline centrifugal pump is used for conveying clean water and other liquids with physical and chemical properties similar to clean water. It is suitable for industrial and urban water supply and drainage, pressurized water supply in high-rise buildings, garden irrigation, fire pressurization, and equipment matching. The operating temperature T is not less than 80 degrees Celsius.

2. Hot water circulation pumps are widely used in energy, metallurgy, chemical, textile, papermaking, hotels, and other boilers for high-temperature hot water pressurized circulation and transportation, as well as in urban heating systems. The ISWR operating temperature T is less than or equal to 120 degrees Celsius, and the WRG operating temperature T is less than or equal to 240 degrees Celsius.

3. Horizontal chemical pump is used to transport corrosive liquids without solid particles, with viscosity similar to water. It is suitable for petroleum, chemical industry, metallurgy, power, paper making, food, pharmacy, Synthetic fiber and other departments. The operating temperature is T: minus 20 ℃ to 120 ℃.

4. Horizontal oil pump, used to transport petroleum products such as gasoline, diesel, kerosene, etc., with a temperature range of T: 20 ° C to 120 ° C.

Structural diagram of horizontal centrifugal pump

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Advantages and disadvantages

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Main advantages: simple structure, convenient maintenance, fixed installation without vibration, good sealing, low noise, convenient maintenance, and low price;

Main drawbacks: Due to the horizontal position of the main shaft of a horizontal centrifugal pump, it occupies more space than a vertical centrifugal pump during installation. Moreover, due to the limitation of suction height, the installation position of the water pump is very low, which is prone to moisture and flooding, affecting safe operation.

Development prospects

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With the continuous development of the economy, centrifugal pumps are increasingly widely used in production engineering due to their advantages such as strong sewage discharge capacity, high efficiency and energy conservation, and good self suction performance. According to professionals in pneumatic double diaphragm pumps, the current market for self priming magnetic pumps is optimistic.

Not only can it be applied to urban environmental protection, construction, fire protection, chemical industry, pharmaceuticals, dye printing and dyeing, brewing, electricity, electroplating, papermaking, petroleum, mining, equipment cooling, oil tanker unloading, etc. It is also suitable for chemical media liquids with a viscosity of less than or equal to 100 millisieverts and a solid content of up to 30% in clear water, seawater, and media with acidity and alkalinity, as well as slurries with general paste.

Currently, centrifugal pumps in China are mainly produced and manufactured by domestic manufacturers, with a small portion imported from abroad. According to professionals in self priming magnetic pumps, self priming centrifugal pumps are widely used for sewage discharge in municipal engineering, factories, commerce, hotels, residential areas, and other areas due to their simple installation, small footprint, convenient maintenance, and no noise.

The market prospects for centrifugal pumps are very broad. However, due to the need for further strengthening of the reliability of sewage pumps, improving the technical content of centrifugal pump products is the main direction for manufacturers' future development.

Key selection points

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Reasonable pump selection requires comprehensive consideration of comprehensive technical and economic indicators such as pump unit, pump station investment and operating costs to make them conform to the principles of economy, safety and applicability. Specifically, it includes the following aspects:

1) High efficiency, low noise, and energy-saving water pumps should be selected, and it is strictly prohibited to choose obsolete products.

2) The pump should be selected based on the design flow rate and required head, and considering the decrease in pump output caused by wear and tear, the pump can be selected by multiplying the calculated head H by a coefficient of 1.05-1.10; A water pump with a characteristic curve that gradually decreases in head as the flow rate increases should be selected, so that the pump operates stably and reliably in parallel; And the operating point of the water pump should be maintained in an efficient range, which not only saves energy but also is not easy to damage the components.

3) When there are no regulating facilities in the water supply network, it is advisable to use a variable speed pump group or a rated speed pump group to operate the water supply. The maximum water output of the pump unit should not be less than the design flow rate of the community's water supply, and should be checked based on fire protection conditions.

4) When selecting lifting pumps for water tanks and towers, the number of pumps should be minimized as much as possible, with one for use and one for backup; When a single pump can meet the requirements, it is not advisable to use multiple parallel connections; If it is necessary to use multiple parallel operation or a combination of large and small pumps, the model and number of pumps should not be too many, and generally should not exceed two types. The head range of the water pump should be similar; When running in parallel, each pump should still operate within the high-efficiency zone.

5) The design water supply flow rate of the variable frequency speed control pump (group) should ensure that it meets the requirements of the maximum design second flow rate in the domestic water supply system. The power supply must be reliable (dual power supply or dual circuit power supply); The working point of the water pump should be selected within the efficient working area of the water pump characteristic curve (Q-H curve), and should not be selected on the extension line of the Q-H curve. The design's most unfavorable working point should be at the right endpoint of the efficient section of the water pump characteristic curve, that is, the point where the water pump has the highest water output but the lower head can meet the requirements, that is, the intersection point between the low point of the efficient section of the water pump characteristic curve and the pipeline characteristic curve. The working range of water pump speed regulation should be within the high-efficiency range of the water pump as much as possible; The speed control range should be set between 25% and 100% of the water supply volume of the water pump; The equipment should have automatic water level control function.

6) The water pump unit of the domestic pressurized water supply system should be equipped with a backup pump, and the water supply capacity of the backup pump should be greater than the water supply capacity of the maximum operating water pump. The water pump should automatically switch and operate alternately.

7) The voltage of the motor equipped with the water pump should be the same, and the power supply system should be the same as the power supply system of the State Grid.