Which is better, screw pump or self priming pump, which is better, which is quieter, which is more d

Progressive cavity pumps and self-priming pumps differ in usage scenarios and performance, so there is no direct comparison between which one is better. Here are the characteristics and application scenarios of each of them:

The progressive cavity pump is a positive displacement pump, which is mainly composed of twin screw and pump body. It is characterized by simple structure, low speed, stable flow, small pulsation, low noise, high pressure, and is suitable for conveying high viscosity, easy crystallization, easy precipitation, and volatile media, such as petroleum, chemical, food, pharmaceutical and other industries.

A self-priming pump is a centrifugal pump that can suck in the medium on its own when it cannot be fed properly. It is characterized by simple structure, easy installation and maintenance, good self-priming performance, and is suitable for transporting liquid media such as clean water and sewage. Self-priming pumps are suitable for media that need to be sucked in nature below the inlet of the water pump.

Therefore, progressive cavity pumps and self-priming pumps are different in application scenarios, and it is necessary to select the appropriate pump type according to the specific use requirements and media characteristics.

Both progressive cavity pumps and self-priming pumps have their advantages and application scenarios, and there is no absolute superiority or disadvantage, depending on the specific use needs. Here are some comparisons of the two:

1.The working principle is different: the progressive cavity pump uses the spiral blades to rotate in the pump chamber to produce volume changes to transport the medium, while the self-priming pump uses the gas-liquid mixture to form a vacuum to absorb the liquid.

2.Different speeds: progressive cavity pumps have a lower speed and are suitable for conveying high-viscosity liquids, while self-priming pumps have a higher speed and are suitable for conveying low-viscosity liquids.

3.Anti-clogging ability: Progressive cavity pumps are prone to clogging when conveying media containing solid particles or high viscosity, and the self-priming performance of self-priming pumps can bring particulate matter to the pump chamber, thereby reducing the possibility of clogging.

4.Conveying distance: The conveying distance of progressive cavity pump is generally far and is suitable for long-distance conveying, while the conveying distance of self-priming pump is relatively short and suitable for short-distance conveying.

5.Maintenance cost: The maintenance cost of the progressive cavity pump is relatively high, and the screw, cavity and other components need to be replaced frequently, while the maintenance cost of the self-priming pump is relatively low and the maintenance is simple.

In short, progressive cavity pumps and self-priming pumps have their own characteristics and application scenarios, and the choice of which one needs to be based on the specific situation.

Of course, the screw pump is better, more stable, and self-priming pump.

If it leaks, you can't self-suck.

We have been doing progressive cavity pumps for a long time, and compared with self-priming pumps, screw pumps have a wider range of applications.

It depends on what you do.

The functions of progressive cavity pumps and self-priming pumps are different.

The self-priming pump is a kind of pump with self-priming function, and the Loong River self-priming pump adopts a three-chamber structure with a side channel principle. The extremely small gap between the pump casing and the impeller also guarantees excellent suction capacity, and its suction line not only exhausts gas, but also conveys the product with gas. Its suction tube not only vents but also conveys products with gas.

The progressive cavity pump is the use of a screw **) and the screw cavity (stator) meshing each other to change the space volume to transport liquid, suitable for conveying medium and high viscosity materials.

Before choosing a pump, you need to measure the concentration, viscosity and impurities of the medium, and then choose the pump according to your needs.

Several water pumps commonly used in supporting environmental protection equipment.

QBY air-operated diaphragm pump.

QBY pneumatic diaphragm pump does not need to be filled with water, the flow is wide, and it allows it to pump both flowing liquid and some media that are not easy to flow, and has a self-priming pump.

Submersible pumps, canned pumps.

Mud pumps and impurity pumps and many other advantages. It can be immersed in the medium to work, the pump does not need to be lubricated with oil, even if it idle, there is no effect on the pump. The head and flow rate can be infinitely adjusted through the opening of the valve.

The standard suction lift is up to 7m, the head is up to 50m, and the outlet pressure is 6kgf c.

Shangcheng sludge screw pump.

The sludge progressive cavity pump is a single progressive cavity pump, and its main working parts are the screw (i.e., rotor) of the eccentric spiral body and the screw bushing (i.e., stator) with a double-line spiral surface on the inner surface The sludge screw pump is a single-screw conveying pump, and its main working parts are the screw (called the rotor) of the eccentric spiral body and the screw bushing (called the stator) with a double-line spiral surface on the inner surface. Its working principle is that when the motor drives the pump shaft to rotate, the screw rotates around its own axis on the one hand, and on the other hand, it rolls along the inner surface of the bushing, thus forming the sealed chamber of the pump. With each revolution of the screw, the liquid in the sealing chamber is advanced by one pitch.

With the continuous rotation of the screw, the liquid is pressed in a spiral pattern from one sealing chamber to another, and finally the pump body is extruded. Screw pump is a new type of machinery for transporting liquids, which has the advantages of simple structure, safe and reliable work, convenient use and maintenance, continuous and uniform liquid discharge, and stable pressure.

ZW self-priming sewage pump.

ZW self-priming sewage pump is the company's designers according to the structure and performance of ZX self-priming centrifugal pump and QW sewage pump, learn from the advantages of similar products at home and abroad, and absorb the use requirements and opinions of the majority of users in many aspects, developed a set of self-priming and sewage discharge, not only like the general clean water self-priming pump without the need for a bottom valve, without irrigation and water diversion, but also can suction containing large particles of solid diameter of 60% of the outlet diameter and fiber length of the impeller diameter of dirt, sediment, waste mineral impurities, Manure treatment and all engineering sewage and colloidal liquids completely reduce the labor intensity of workers, and are easy to use, move and install, with little maintenance and stable performance.

WQP stainless steel submersible sewage pump is designed with large flow channel anti-clogging hydraulic parts, which greatly improves the ability of dirt to pass through, and can effectively pass through 5 times the fiber matter of the pump diameter and about 50% of the pump diameter of solid particles. The design is reasonable, the supporting motor is reasonable, the efficiency is high, and the energy saving effect is remarkable. Mechanical seals.

It adopts double-channel series seal, and the material is hard wear-resistant tungsten carbide.

It has the characteristics of durability and wear-resistant, which can make the pump run safely and continuously for more than 8000 hours.

First of all, the performance of the two pumps is different, so there is no way to compare. It's up to you for what you do it for.

Of course, the first choice to buy vacuum pumps is Busch, the products are purely imported, the process is rigorous, the quality is supreme, stable and reliable, sturdy and durable, it is a leader in the industry, and is widely praised and favored by users. The Busch Cobra dry screw vacuum pump is used efficiently in a wide range of industrial sectors, and the variable pitch and free venting greatly increase the pump's ability to handle liquids and dusts. Its unique temperature distribution provides corrosion resistance.

The optimized efficiency reduces the heat load and thus extends the life of the pump. If you feel that the above is not detailed enough, you can consult Busch Vacuum Equipment International (Shanghai)****. Vacuum Solutions International (Shanghai) and Vacuum Vacuum Technologies (Shanghai) are wholly-owned subsidiaries of Vacuum Solutions in China

The advantages of the impeller of the household self-priming pump are as follows:

1. The impeller is suitable for conveying liquids containing suspended solids such as solid particles and fibers.

2. The impeller is less difficult to manufacture, the cost is low, and the adaptability is strong, and in recent years, it has been gradually applied in centrifugal pumps for oil refining and chemical industry, and is used to transport clean water and liquids similar to clean water.

Impeller, generally two kinds of structure, one of which is the front semi-open type, composed of the rear cover plate and the blade, the efficiency of the impeller of this structure is low, in order to improve the efficiency, the sealing ring with adjustable clearance needs to be used, and the other is the rear semi-open type, which is composed of the front cover plate and the blade, because the same sealing ring can be applied with the closed water pump impeller, the efficiency is basically the same as the closed impeller, and the blade also has the sealing effect (back blade or auxiliary impeller) in addition to transporting liquid.

Screw pump, and the screw pump can allow the suction material to have a certain amount of impurities compared to the impeller pump. If there are many impurities or sundries in the material, a filter should be added before the impeller pump sucks into the mouth. Otherwise, it is very easy to wear and break.

Is it better to use an impeller or a screw at home? I think it's better to use a screw, this one is quieter, almost silent.

Of course, this is a screw, if it will be a better screw, that is, its quality will be better to use, and it will be a little longer after a time.

If it is to draw water, the impeller is good.

Not necessarily, depending on what you're using it for.

Summary. The advantages of the submersible pump: the submersible pump equipment area is small, the impeller is located underwater, and the function of sucking people is better, so a higher speed can be selected, and it does not need to be filled with water to start, which is convenient for automation. The submersible pump with small size and light weight can also be easily used and carried.

Defects of submersible pumps: the primary part is located below the water surface, which is inconvenient for maintenance, the lifting height of the crane is high, the height of the pump room is high, the mechanical load is gathered, the load per unit area is large, and the maintenance of water-lubricated bearings is troublesome. The cable of the submersible pump that often moves is simply damaged, and the cable needs to be specially protected during the mobile application process.

Is it better to have a self-priming pump or a submersible pump?

Hello, I'm here for your question, I'm sorting out the answer, please wait.

Dear, both self-priming pumps and submersible pumps have their own advantages, and you need to choose a water pump according to your local conditions. If you are pumping water on land, you can generally choose a self-priming pump; If you are pumping water in a well, you can choose a submersible pump, because you don't have to worry about the suction lift when you are in the well.

According to the different principles of use, there is a distinction between self-priming pumps and submersible pumps. The submersible pump is the pump body that is put into the water to work, while the self-priming pump is the pump body that is installed on the ground to suck the water from the low place into the pump body, and then the pump body is thrown out of the pump body by the impeller and transported to a higher and farther place.

Advantages of self-priming pumps: The main part is located above the water surface, which is easy to maintain. The load distribution is relatively uniform, and the mechanical load per unit area is small.

The lifting height is small, the height of the pump room is low, and there is no need to move the power machine when dismantling. Water-lubricated bearings are less and can be dispensed with. The total cost of self-priming pumps, transmission equipment and power engines is relatively cheap.

Defects of self-priming pumps: due to the need to pump water from a low place into the pump chamber and then pressurize and transport it to a farther place, the higher the suction lift of the self-priming pump, the higher the head loss.

The advantages of the submersible pump: the submersible pump equipment area is small, the impeller is located underwater, and the function of sucking people is better, so a higher speed can be selected, and it does not need to be filled with water to start, which is convenient for automation. The submersible pump with small size and light weight can also be easily used and carried.

Defects of submersible pumps: the primary part is located below the water surface, which is inconvenient for maintenance, the lifting height of the crane is high, the height of the pump room is high, the mechanical load is gathered, the load per unit area is large, and the maintenance of water-lubricated bearings is troublesome. The cable of the submersible pump that often moves is simply damaged, and the cable needs to be specially protected during the mobile application process.

Self-priming pumps and submersible pumps are often interchangeable, and you can choose according to your use and advantages and disadvantages.

Dear, do you still have any questions, you are welcome to contact me at any time.

That's my answer, I hope it helps you, and I wish you a happy life.

Self-priming jet pumps and progressive cavity pumps have their own advantages and disadvantages, and should be selected according to the specific use environment and needs.

Self-priming jet pump:

Advantages: can inhale liquids on their own, no need for additional water intake; Suitable for low-viscosity, low-concentration liquids; Easy to install and maintain.

Disadvantages: The flow rate of the pump head is limited, and it is not suitable for large flow rates; noisy; High energy consumption; It requires air or water flow for inhalation, which is more polluting to the environment.

Screw pump: Advantages: Able to convey high viscosity and high concentration liquids; Stable delivery, non-nuclear pulsation; Able to withstand high pressures; Reversible, the pump head is not easy to wear; High efficiency and low energy consumption.

Disadvantages: Requires additional water diversion; Inability to inhale; It is more complex and requires professional maintenance personnel to carry out maintenance; The cost is higher.

Therefore, the choice of pump depends on the specific environment and needs of the application. If you need to convey a liquid with high viscosity and high concentration, and high pressures are required, progressive cavity pumps are more suitable; If there are requirements for noise, energy consumption and usage costs, etc., a self-priming jet pump can be selected.

Advantages of screw self-priming pumps: low speed, low mechanical wear, no cavitation. The flow channel is wide, and it can convey water containing solids.

The structure of the pump body is half-open, and the operation of the pump can be observed. The suction side flow state has little impact on the hydraulic performance, there is no special requirement for the suction pool, the foundation excavation depth is small, the construction of hydraulic buildings is simple, and the civil engineering cost is small. Cons:

The size is large, and the footprint is also large. Restricted by the shortage of work conditions of Qi Pao machinery and orange, the pump shaft can not be too long, so the head is low, not more than 10m. The height of the suction surface and the outlet surface should not change too much, otherwise it will affect the work efficiency and increase the energy consumption.

The advantages of the impeller of the household self-priming pump are as follows: 1. The impeller is suitable for transporting liquids containing solid particles, fibers and other suspended solids. 2. The impeller is less difficult to manufacture, the cost is low, and the adaptability of selling travel limbs is strong, and in recent years, it has been gradually increased in centrifugal pumps for oil refining and chemical industry, and is used to transport clean water and liquids similar to clean water.

First, the characteristics are different

1. Self-priming pump: It 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 only need to ensure that the pump body is stored with quantitative fluid extraction before working.

Self-priming pumps of different materials can be used for different liquids.

2. Self-priming screw pump: simple structure, easy to manufacture, large flow rate, small head loss, high efficiency, easy to repair and maintain, but low lift, low speed, need to set up a variable speed device.

Second, the structural principle is different

1. Self-priming pump:

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.

2. Self-priming screw pump:

A pump that uses the rotation of spiral blades to make the water body rise in an axial spiral shape. It is composed of shaft, spiral blades, and housing. When pumping water, the pump is placed obliquely in the water, so that the inclination angle of the main shaft of the pump is less than that of the spiral blades, and the lower end of the spiral blades is in contact with the water.

When the prime mover rotates the shaft of the screw pump through the speed shifter, the water enters the vanes and rises along the spiral flow channel until it is outflow.

Common types. ZW self-priming pump is an energy-saving pump product developed after absorption, digestion and improvement according to relevant technical data at home and abroad. The pump is a self-priming centrifugal pump, which has the advantages of compact structure, convenient operation, stable operation, convenient maintenance, high efficiency, long life, and strong self-priming ability.

There is no need to install a foot valve in the pipeline, and only the pump body needs to be kept for quantitative drainage before work, so the piping system is simplified to improve labor conditions.

Main uses: 1. Equipped with a rocker arm nozzle, it can be washed into the air and dispersed into fine raindrops for spraying, which is a good tool for farms, nurseries, orchards and tea gardens.

2. It is suitable for clean water, seawater and chemical medium liquids with acid and alkalinity and slurry with general paste (medium viscosity is 100 centipore, and the solid content can reach less than 30%).

3. It can be used with any type and specification of filter press, and the slurry is the most ideal supporting pump for filter pressing.

ZW self-priming non-clogging sewage pump is a new type of pump integrating self-priming and sewage discharge according to the structure and performance of ZX self-priming centrifugal pump and QW submersible sewage pump, and drawing on the advantages of similar foreign products.

It can not only be like the general clean water self-priming pump without installing the bottom valve, without irrigation and water diversion, but also can suck up the dirt, sediment, waste mineral impurities, fecal treatment and all engineering sewage and colloidal liquids containing large particles with a solid diameter of 60% of the outlet diameter and fiber length of the impeller diameter, completely reducing the labor intensity of manpower, and easy to install and use, with little maintenance, the performance has reached the international advanced level, and has a broad application market and development prospects.

The above content refers to: Encyclopedia - Progressive cavity pump.

The above content reference: Encyclopedia - Self-priming pumps.