How to choose a horizontal pipeline centrifugal pump?

Split box pump (split circulation) is also known as single-stage double-suction centrifugal pump, and its main feature is the large flow rate of the conveying medium. The working principle of the operation of the split case pump: The impeller is installed in the pump casing and fastened to the pump shaft, which is directly driven by the motor.

The pump casing** has a liquid suction connected to the suction pipe. The liquid enters the pump through the foot valve and suction pipe. The liquid discharge port on the pump casing is connected to the discharge pipe.

When the speed of the pump is constant, its pressure head and flow rate are related to the diameter of the impeller. It is widely used in petroleum, chemical industry, electric power metallurgy, mining, ship selection, light industry, agriculture, civil and national defense departments, and occupies an important position in the national economy. Changsha Zhonglian Pump Industry has more than 30 years of experience in the production of Zhongkai pumps, and we have 10,000+ cooperation units, and the selection of **...

Horizontal pipeline centrifugal pump is 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, high-rise building pressurized water supply, garden sprinkler irrigation, fire pressurization, long-distance transportation, HVAC and refrigeration cycle, bathroom and other cold and warm water circulation pressurization and equipment matching, the basic structure of the pipeline centrifugal pump is composed of six parts, namely impeller, pump body, pump shaft, bearing, sealing ring. There are senior engineers on the official website to help you answer. It has international advanced standards.

Horizontal pipeline centrifugal pump is a commonly used centrifugal pump with a wide range of application value. It sucks in the liquid from the conveying section to the end by rotating the impeller, and throws the liquid out through the rotating motion of the impeller, so as to achieve the purpose of conveying the liquid by holding the imitation. The horizontal pipeline centrifugal pump has the following functions:

It is used for transporting clean water and other liquids with physical and chemical properties similar to clean water, and is suitable for industrial and Darang urban water supply and drainage, pressurized water delivery for high-rise buildings, garden sprinkler irrigation, fire pressurization, long-distance transportation, HVAC and refrigeration cycle, bathroom and other cold and warm water circulation pressurization and equipment supporting, with a temperature of <80

It is mainly used for conveying liquids with a temperature not higher than 80, viscosity not more than 100 centipoise, and no corrosive, toxic and flammable, and the maximum temperature of the conveyed liquid does not exceed 80.

The above is the role of horizontal pipeline centrifugal pump, I hope it will help you.

The purpose of the two pumps is not the same.

The horizontal pump body works outside the water surface. If the outlet is closed first and then the power is turned off, water will remain in the pump body. The next time you activate it, you won't need to irrigate it.

The pump body and blades of the vertical pump are buried below the water surface to work. So turn off the power first and then turn off the outlet.

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

No leakage: cemented carbide seals of different materials ensure that there is no leakage in the transportation of different media. Low noise:

The water pump supported by two low-noise bearings runs smoothly and is basically noiseless except for the weak sound of the motor. Low failure rate: the structure is simple and reasonable, the key parts are equipped with world-class quality, and the trouble-free working time of the whole machine is greatly improved.

Easy maintenance: Replace seals and bearings, easy and convenient. More land saving:

The outlet can be left, right and up, so that the pipeline can be arranged and installed to save space.

Advantages of Vertical Pumps: It is used for conveying abrasive, coarse granular, high-concentration slurry, does not require any shaft seal and shaft seal water, and can work normally under the working condition of insufficient suction volume.

Slurry is actually an object that is formed by mixing water or other types of liquids with some solid matter that does not dissolve in liquids. The type, size, shape and content of solids in the slurry comprehensively determine the physical properties and flow characteristics of the slurry. An accurate description of a type of slurry in engineering requires the following main characteristic parameters.

Secondly, it is necessary to grasp the characteristics and classification of slurry. In industrial applications, slurries are divided into different types according to their characteristics.

First, the structure is different:

Vertical centrifugal pumpWe can literally know that this is a centrifugal pump with a vertical structure. The horizontal centrifugal pump is the same, which is literally a centrifugal pump with a horizontal structure.

Second, the use is different:

Vertical centrifugal pump: 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 for high-rise buildings, garden sprinkler irrigation, fire pressurization, long-distance transportation, HVAC and refrigeration cycle, bathroom and other cold and warm water circulation pressurization and equipment supporting, the use temperature t<80.

Horizontal centrifugal pump: for conveying liquid that does not contain solid particles, is corrosive, and has a viscosity similar to water, and is suitable for petroleum, chemical, metallurgy, electric power, papermaking, food, pharmaceutical, and synthetic fiber and other sectors, and the operating temperature t: -20 to 120.

3. Different forms of connection:

The vertical pump is a bottom-up superimposed connection, and the horizontal pump is arranged longitudinally on the left and right sides and on the base.

Fourth, the space occupied is different:

Since the vertical centrifugal pump is a vertical structure, the vertical pump does not need much space in terms of floor space. The horizontal centrifugal pump is much larger than the vertical pump in terms of floor space due to its horizontal structure.

Fifth, the installation form is different:

The two different constructions, vertical and horizontal, will also make their installation methods different. For example, a vertical pump is integrally connected and is easy to install. The horizontal pump also needs to be adjusted for accuracy after installation.

Sixth, the difficulty of maintenance is different

It is difficult to overhaul the vertical pump, such as the maintenance of the impeller can only be carried out after the upper part needs to be removed; Horizontal pumps, on the other hand, are relatively easy, such as IS pumps, which can be overhauled by removing the inlet pipe.

There are several aspects to consider when choosing a pipeline centrifugal pump:

Flow requirements: Select the appropriate pipeline centrifugal pump according to the flow rate of the liquid to be delivered. In general, the higher the flow rate, the corresponding increase in the head and power of the selected pump.

Head requirements: select the appropriate pipeline centrifugal pump according to the head required to transport the liquid. Head refers to the total pressure that a liquid needs to overcome from inlet to outlet, and is generally used in meters or pascals. The head of the selected pump should be at or equal to the head required to convey the liquid.

Temperature requirements: Choose the appropriate pipeline centrifugal pump according to the temperature requirements of the liquid being transported. In general, centrifugal pumps are suitable for conveying liquids up to a temperature of 80 °C. If the temperature of the liquid is more than 80 °C, a high-temperature centrifugal pump needs to be selected.

Fluid properties: Choose the right pipeline centrifugal pump according to the nature of the liquid being transported. Different liquid properties will have an impact on the choice of pump, such as viscosity, corrosiveness, etc. It is necessary to select the appropriate pump material and sealing form according to the nature of the liquid.

Pump reliability and efficiency: When choosing a pipeline centrifugal pump, in addition to meeting the basic requirements such as flow, head, temperature, fluid properties, etc., the reliability and efficiency of the pump also need to be considered. In general, the more reliable and efficient the pump, the longer the service life and the lower the energy consumption.

Maintenance and service requirements: When choosing a pipeline centrifugal pump, you also need to consider the maintenance and maintenance requirements of the pump. In general, the simpler and more convenient the pump with maintenance and maintenance requirements, the lower the cost of use.

Based on the above aspects, the selection of a suitable pipeline centrifugal retainer pump requires sufficient technical comparison and evaluation. It is recommended to consult with a professional pump manufacturer or technician before choosing to ensure that the selected pipeline centrifugal pump can meet the actual needs.

Select the basic data of the pipeline centrifugal pump listed:

1. Characteristics of the medium: medium name, specific gravity, viscosity, corrosiveness, toxicity, etc.

2. The diameter and content of the solid particles contained in the medium.

3. Medium temperature: (

4. The required flow rate The leakage in the pipeline system can be ignored in the process of general industrial pumps, but the impact on the flow rate must be considered when the process changes. If the agricultural pump is used to transport water in the open file such as a local canal, the leakage and evaporation must also be considered.

5. Pressure: suction pool pressure, drainage pool pressure, pressure drop (head loss) in the pipeline system.

6. Pipeline system data (pipe diameter, length, type and number of pipeline accessories, geometric elevation from suction tank to pressurized water tank, etc.).

If necessary, a characteristic curve of the device should also be made. When designing the pipeline centrifugal pump to arrange the pipeline, the following matters should be noted:

1. Reasonable selection of pipe diameter, large pipe diameter, under the same flow rate, small liquid flow velocity, small resistance to rubber denier force loss, but high quality, small pipe diameter, will lead to a sharp increase in resistance loss, so that the head of the selected pump increases, the power of the belt increases, and the cost and operation concession costs are increased. Therefore, it should be considered from a comprehensive technical and economic point of view.

2. The discharge pipe and its pipe joint should consider the maximum pressure that can be withstanded.

3. The pipeline layout should be arranged as a straight pipe as much as possible, try to reduce the accessories in the pipeline and minimize the length of the pipeline, when it must be turned, the bending radius of the elbow should be 3 5 times the diameter of the pipe, and the angle should be greater than 90 as much as possible.

4. The discharge side of the pump must be equipped with valves (ball valves or globe valves, etc.) and check valves. The valve is used to adjust the operating point of the pump, and the check valve prevents the pump from reversing when the liquid is flowing backwards and protects the pump from water hammer. (When the liquid flows backwards, a huge reverse pressure is generated, which damages the pump).

Select the pipeline centrifugal pump to determine the flow head, the determination of the flow rate:

1. If the minimum, normal and maximum flow rate has been given in the production process, it should be considered according to the maximum flow rate.

2. If only the normal flow rate is given in the production process, a certain margin should be considered. For NS>100 high-flow low-head pumps, the flow margin is 5%, for NS<50 small-flow high-head pumps, the flow margin is 10%, for 50 NS100 pumps, the flow margin is also 5%, and for the pumps with poor quality and poor operating conditions, the flow margin should be 10%.

3. If the basic data is only given by weight, it should be converted into volumetric flow.

Pipeline centrifugal pumps

1.Piping arrangement.

The pipeline layout conditions of the device system refer to the conveying height, conveying distance and conveying direction of the liquid; The minimum liquid level on the suction side and the maximum liquid on the discharge side are the specifications, lengths, materials and quantities of these pipes, which are conducive to the calculation of the system head and the calibration of the NPSH.

2.The amount of liquid to be transferred.

One of the most important performance data for choosing a chemical pipeline pump is the liquid transfer capacity of the pump, which is directly related to the production capacity and conveying capacity of the entire equipment. When selecting a pump, the maximum flow rate is used as the basis, and the normal flow rate is considered, when there is no maximum flow rate, the slag book can generally be taken as a multiple of the normal flow rate.

3.Liquid properties.

Liquid properties refer to the name, physical properties, chemical properties, and other properties of the liquid medium. The physical properties mainly refer to the diameter of solid particles in the medium and the content of gas, which are related to the calculation of the head and effective NPSH of the system. Chemical properties mainly refer to the chemical corrosivity and toxicity of liquid media, which is an important basis for the selection of pump materials and the type of shaft seal for free dust.

4.Operating conditions.

When choosing a pump, consider whether the operation is interstitial or continuous, and whether the position of the pump is fixed or removable.

5.Device head.

The head required for the equipment system is another important performance data when selecting a pump. Usually, the head is selected after expanding the margin of 5 -10 .

1. The requirement of the impulse of the flow lead celery is to see how much water the user needs to extract, and the single suction pump, double suction pump, or small flow centrifugal pump can be selected in the requirements for the flow rate.

2. The head refers to the height of the pump that can lift water, which is an important working performance parameter of the pump. Users can choose single-stage pumps, multi-stage pumps, or high-speed centrifugal pumps for the height of the head.

3. In terms of the use environment, you can choose according to the site you need to use, including centrifugal pumps for chemical industry, high-temperature centrifugal pumps in high-temperature environments, and so on.

4. In terms of medium selection, users can choose according to the characteristics of the medium to be pumped according to their needs, such as the first plexus to choose the clean water centrifugal pump for pumping clean water, the hot water centrifugal pump for pumping hot water, and the centrifugal oil pump for pumping gasoline.

Hello, functionally, hydraulics are basically the same, both are in the field of centrifugal pumps. So it's hard to distinguish from the function. In terms of structural features, the two types of pumps can be seen from the appearance, which are different.

In terms of selection, most people will prefer to use horizontal single-stage centrifugal pumps, mainly because horizontal pumps are simple, easy to repair and protect. The vertical long-shaft pump is troublesome to repair, and it needs to be lifted every time it is repaired. And the long-shaft pump needs to replace the sliding bearing under the liquid for a long time, if it is not replaced, then the result may be that the centrifugal force of the shaft is getting larger and larger, resulting in the shaft runout value becoming larger, if not replaced in time, it will form a mechanical incident.

And when installing, it is necessary to ensure that the device is definitely level.

Thirdly, if the general horizontal pump (not a self-priming pump) has poor self-priming ability, the bottom cannot pump the medium from the tank below. Therefore, horizontal pumps and long-shaft pumps are not comparable. However, there is a comparison between horizontal self-priming pumps and vertical long-shaft pumps.

Compared with the reciprocating pump of the same index, the ISG pipeline centrifugal pump has a simple and compact structure, small size, light weight, few parts, convenient manufacturing, low cost, and small floor space, so its equipment and repair costs are low.

Relatively good.