What is the difference between a centrifugal water pump and a self priming water pump

Centrifugal water pumps and self-priming water pumps are two different types of water pumps, and their working principles and characteristics are different:

Working principle: Centrifugal water pump: A centrifugal water pump is a pump that pumps liquid from the inlet through centrifugal force and increases the pressure of the liquid through the kinetic energy of the rotating impeller. The liquid is sucked at the inlet, then sent to the centrifugal impeller and pushed to the outlet by centrifugal force.

Self-priming water pump: A self-priming water pump is a specially designed pump that has a self-priming capacity and can suck the liquid into the pump on its own when it starts, without the need for external water intake.

Suction Lift Capacity: Centrifugal Water Pumps: Centrifugal water pumps typically require a liquid static head to provide inlet pressure, so in the case of higher suction lifts, auxiliary equipment or design may be required to achieve water suction.

Self-priming water pump: The self-priming water pump can suck in the liquid on its own at a lower suction stroke, so the self-priming water pump is more suitable when the inlet level of the pump is low.

Application scenario: Centrifugal water pump: Centrifugal water pump is widely used in industry, construction, agriculture, urban water supply, drainage and other fields, especially suitable for transporting large flow of liquid.

Self-priming water pump: The self-priming water pump is suitable for drainage, water**, agricultural irrigation and other scenarios that require self-priming capacity, especially when the inlet level of the pump is low or static water head cannot be provided.

In general, centrifugal water pump is a commonly used type of pump, which is suitable for occasions with large flow and large head, but it needs to provide sufficient water head when starting; The self-priming water pump, on the other hand, has a self-priming capability and is suitable for scenarios where the inlet level of the pump is low or a static head cannot be provided. The choice of pump depends on the specific requirements and scenarios of use.

Centrifugal pump is a simple chemical pump, the structure is characterized by its higher efficiency conversion rate, so under the same energy consumption, the chemical pump has a larger flow rate than the self-priming pump. It is also because of the simple structure that the chemical pump is not self-priming, but this is a small problem, because in the case of installing a foot valve or a check valve in the inlet pipeline, the chemical pump also has self-priming ability.

The difference between centrifugal and self-priming pumps.

1. They are all centrifugal pumps.

2. The chemical pump does not have self-priming ability, and the self-priming pump has a certain self-priming ability.

The specific difference is that 1, the self-priming pump has more self-priming barrel and check valve devices than the chemical pump, 2. The height of the structure of the pump chamber of the self-priming pump is above the impeller shaft 2 3 At the beginning, the inlet of the chemical pump is at the axis of the impeller.

3. In the case of installing a foot valve, both will have self-priming ability.

4. In the case of the same power, the efficiency conversion rate of chemical pump is higher than that of self-priming pump. Because the structure of self-priming pumps is more complex than that of chemical pumps, there are more losses.

To put it simply, the self-priming pump is a kind of centrifugal pump, and its biggest difference is that compared with the general centrifugal water pump, the self-priming pump does not need to fill the pump.

Summary. Hello, it must be the centrifugal pump flow rate <>

To give you a science popularization centrifugal pump needs to be filled with water every time it is started, and the self-priming pump does not need to be irrigated again because it can store a part of water. Centrifugal pumps are available in various forms, such as vertical, horizontal, single-stage, multi-stage, single-suction, double-suction, and self-priming. The centrifugal pump drives the water to rotate through the high-speed rotating impeller blades and throws the water out, so as to achieve the purpose of pumping water.

Relying on the high-speed rotation of the impeller, the liquid in the center of the impeller is forced to be thrown away at a high speed, resulting in a low pressure in the center of the impeller, so that the liquid in the low groove is continuously sucked up. If the centrifugal pump is filled with gas in the casing before starting, the central gas of the impeller after starting can not form a large enough vacuum in that place when it is thrown, so that the liquid in the tank can not be sucked up, so the space in the pump casing should be filled with external liquid before the centrifugal pump starts, and in order to prevent the liquid poured into the pump casing from flowing into the low-level groove due to gravity, a check valve (bottom valve) is installed at the inlet of the pump suction pipeline; If the pump is positioned below the tank level, there is no need to refill the pump at start-up.

The self-priming pump is a self-priming centrifugal pump, which is a kind of centrifugal pump.

Which has the highest flow rate, centrifugal pump or self-priming pump.

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Hello, it must be the centrifugal pump flow rate <>

To give you a science popularization centrifugal pump needs to be filled with water every time it is started, and the self-priming pump does not need to be irrigated again because it can store a part of water. Centrifugal pumps are available in various forms, such as vertical, horizontal, single-stage, multi-stage, single-suction, double-suction, and self-priming. The centrifugal pump drives the water to rotate through the high-speed rotating impeller blades and throws the water out, so as to achieve the purpose of pumping water.

Relying on the high-speed rotation of the impeller, the liquid in the center of the impeller is forced to be thrown away at a high speed, resulting in a low pressure in the center of the impeller, so that the liquid in the low groove is continuously sucked up. If the centrifugal pump is filled with gas in the casing before starting, the central gas of the impeller after starting can not form a large enough vacuum in that place when it is thrown, so that the liquid in the tank can not be sucked up, so the space in the pump casing should be filled with external liquid before the centrifugal pump starts, and in order to prevent the liquid poured into the pump casing from flowing into the low-level groove due to gravity, a check valve (bottom valve) is installed at the inlet of the pump suction pipeline; If the pump is positioned below the tank level, there is no need to refill the pump at start-up. The self-priming pump is a self-priming centrifugal pump, which is a kind of centrifugal pump.

Centrifugal self-priming pump is a kind of centrifugal pump, but it has one more self-priming function <>

Centrifugal self-priming pump is a kind of centrifugal pump, but it has one more self-priming function <>

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Centrifugal pump is the classification of water pump according to the working principle, and submersible pump is the classification of the use environment, the principle of ordinary centrifugal pump is through the principle of centrifugal force, the pump and the water inlet pipe are filled with water before starting, or the vacuum pump is used to pump air after starting, the working principle of the ordinary centrifugal pump automatic water supply device is to use the artificial well to directly discharge the air in the pump and the pump suction pipe, and through the check valve, gate valve and other facilities to make the water bridge Changsan pump and the pump suction pipe always full of water, can be started at any time.

The submersible pump is a special centrifugal pump, which immerses the water pump and the motor package into the medium Min's, and uses the water cooling method as the heat dissipation of the motor.

Centrifugal pump: Huiwangfu is designed according to the principle of centrifugal force, and the high-speed rotating impeller blades drive the liquid to rotate and throw the liquid out, so as to achieve the purpose of transportation. There are many media that can be transported, such as oil, water, chemical raw materials, etc.

Submersible pump: a special structure of centrifugal pump, the pump shaft and the motor shaft are the same shaft, and the pump and motor are immersed in water as a whole. The conveying medium is the front carrying water.

Hope it helps.

All good. 1) Self-priming pumpEliminates the hassle of exhausting air, but with the same power, there is no centrifugal pump to produce a large amount of water.

2) Centrifugal pumpThe water output is larger than that of a self-priming pump, but you need to configure a device to exhaust air.

The main differences between centrifugal pumps and self-priming pumps are as follows:

The working principle is different: centrifugal pumps suck liquid from the inlet into the pump body by centrifugal force, then accelerate to high-speed rotation, and finally discharge the liquid from the outlet; Self-priming pumps draw liquid from the inlet into the pump through the vacuum effect inside the pump body, and then discharge the liquid from the outlet.

The suction lift height of the centrifugal pump is relatively low, generally less than 10 meters, while the suction lift height of the self-priming pump is higher, generally more than 6 meters.

The way of sucking in the liquid is different: a centrifugal pump needs to fill the liquid before starting or to introduce the liquid through a vacuum pipe into the pump body, while a self-priming pump can be started without liquid and can automatically suck up the liquid.

Centrifugal pumps are suitable for conveying low-viscosity liquids such as water and oil, while self-priming pumps are suitable for conveying low-viscosity liquids and some gas-liquid mixtures, such as sewage, gas-containing liquids and chemicals.

Different shape and structure: Centrifugal pumps and self-priming pumps also have certain differences in shape and structure, for example, the outlet of a centrifugal pump is usually on one side of the pump body, while the outlet of a self-priming pump is usually on the top of the pump body.

To sum up, although centrifugal pumps and self-priming pumps are both common types of water pumps, there are certain differences in terms of working principle, suction lift, liquid inhalation mode, applicable occasions, shape and structure. The selection of a specific pump type should be considered according to the actual needs and conditions of use.

1. The working principle is different.

The working principle of a self-priming pump is that the casing is filled with water (or the casing itself contains water) before the pump is started. After starting, the high-speed rotation of the impeller makes the water in the impeller channel flow to the vortex shell, and then the inlet forms a vacuum, so that the water inlet backstop door is opened, and the air in the suction pipe enters the pump, and reaches the outer edge through the impeller channel.

The self-priming pump is a self-priming centrifugal pump, which has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency, long life, and strong self-priming ability. There is no need to install a foot valve in the pipeline, and it is only necessary to keep the pump body stocked with quantitative fluid extraction before work. Self-priming pumps of different materials can be used for different liquids.

The working principle of centrifugal pump is: the water is used to rotate and make the water centrifugal move to work. Before the pump starts, the pump casing and suction pipe must be filled with water, and then the motor is started to make the pump shaft drive the impeller and water to do high-speed rotation movement, and the water undergoes centrifugal movement, which is thrown to the outer edge of the impeller and flows into the pressurized water pipeline of the pump through the flow channel of the snail pump casing.

2. Differences in composition and structure.

The centrifugal pump is composed of six parts, namely the impeller, the pump body, the pump shaft, the bearing, the sealing ring, and the stuffing box.

The self-priming pump is composed of a suction chamber, a liquid storage chamber, a scroll chamber, a liquid return hole, and a gas-liquid separation chamber.

3. The difference in the startup method.

When the centrifugal pump is started, the inlet pipe and the pump body need to be filled with water at the same time, or the inlet pipe should be pumped with an auxiliary device.

When the self-priming pump is started, a certain amount of starting circulating water should be injected into the pump body.

4. The difference between different devices.

Centrifugal pumps must be equipped with a bottom valve at the lower end of the inlet pipe or an air extraction device at the outlet. The self-priming pump is only equipped with a filter screen at the lower end of the inlet pipe and has no bottom valve.

5. Differences in use.

Centrifugal pumps are used in liquid transfer, cooling systems, industrial cleaning systems, aquaculture farms, fertilization systems, metering systems, and industrial equipment. It can also be widely used in electric power, metallurgy, coal, building materials and other industries to transport slurry containing solid particles.

The self-priming pump can disperse the water into fine raindrops for spraying, which is a good machine for farms, nurseries, orchards, and vegetable gardens. It is suitable for clear water, seawater and chemical medium liquids with acid and alkalinity and slurry with general paste. It can be used with any model and specification of filter press, and is an ideal pump for filter press when the slurry is sent to the filter press.

Self-priming pumps and centrifugal pumps are both common fluid transfer devices, and there are some differences between them. Here are the main differences between them:

Starting method: The self-priming pump needs to be filled with liquid to remove the air in the pump before starting, so as to form a local vacuum and realize automatic water absorption. Pump operation is required after the first use or after a long shutdown.

Once there is a certain amount of liquid in the pump, the self-priming pump can automatically suck in the liquid when it is subsequently started. Centrifugal pumps typically need to be installed below the surface of the liquid and rely on hydrostatic pressure to enter the pump. If it is located above the liquid level, the centrifugal pump needs to be evacuated by means of a vacuum pump or other means to absorb water.

Self-priming capacity: The self-priming pump has a self-priming capacity and can automatically suck in liquids after start-up. This makes self-priming pumps suitable for use in applications where the transfer height of the liquid varies greatly or the liquid is not easily extracted.

Centrifugal pumps are often not self-priming and rely on external conditions or auxiliary equipment to deliver liquids.

Structural differences: Self-priming pumps usually have a special structure that can form a local vacuum to achieve automatic water suction. Usually self-priming pumps include an air separation chamber that collects and discharges the air inside the pump, thus achieving the self-priming function.

The structure of a centrifugal pump is relatively simple, mainly composed of components such as pump casing, impeller, shaft seal and bearing. Centrifugal pumps rely on the centrifugal force of the impeller to throw the liquid out of the pump to achieve liquid delivery.

Application scenario: Self-priming pumps are suitable for occasions that require self-priming capabilities, such as discharging sewage, conveying liquids with gas, irrigation, etc. The self-priming energy pin content of the self-priming pump allows it to be used in situations where the conveying height of the liquid varies greatly or the liquid is not easy to extract.

Centrifugal pumps are widely used in various occasions, such as water supply and drainage, fire fighting, air conditioning, refrigeration, industrial processes, etc. The centrifugal pump has high head and efficiency, and is suitable for occasions with large flow rate and high head.

In short, there are certain differences between self-priming pumps and centrifugal pumps in terms of structure, working principle and application scenarios. According to the actual needs and operating conditions, the suitable pump type can be selected.