China high quality Vacuum Water Pump for Paper Mill vacuum pump ac system

Product Description

Product Description

The water ring vacuum pump is equipped with an eccentric rotor with fixed blades. It is a rotary variable volume vacuum pump that throws water (liquid) to the stator wall, forms a liquid ring concentric with the stator, and the liquid ring forms a variable volume together with the rotor blades.
The water ring vacuum pump is a kind of coarse vacuum pump. The limit vacuum it can obtain is 2000 ~ 4000 Pa, and the vacuum degree of the unit composed of the vacuum pump can reach 1 ~ 600 Pa. Water ring pump can also be used as compressor, called water ring compressor. It is a low-pressure compressor with a pressure range of 1 ~ 2 × 105 Pa gauge pressure.


Water ring pumps can be divided into the following types according to different structures.

Single stage single acting water ring pump Single stage means that there is only 1 impeller, and single action means that the suction and exhaust are carried out once every rotation of the impeller. The extreme vacuum of this pump is high, but the pumping speed and efficiency are low.
Single stage double acting water ring pump Single stage means that there is only 1 impeller, and double action means that the suction and exhaust are carried out twice for each rotation of the impeller. Under the same pumping speed, the size and weight of double acting water ring pump are greatly reduced than that of single acting water ring pump. Since the working chamber is symmetrically distributed on both sides of the pump hub, the load acting on the rotor is improved. This kind of pump has high pumping speed and efficiency, but the limit vacuum is low.
Two stage water ring pump Two stage water ring pumps are mostly single acting pumps in series. In essence, the impellers of 2 single-stage single acting water ring pumps are connected by sharing a mandrel. Its main feature is that it still has large pumping speed under high vacuum and its working condition is stable
Atmospheric water ring pump
Atmospheric water ring pump is actually a unit of atmospheric ejector series water ring pump. The atmospheric pump in series in front of the water ring pump is to improve the limit vacuum and expand the application range of the pump

Working principle

The working principle of the water ring vacuum pump is that the impeller is eccentrically arranged with the pump body. When the impeller rotates, the water forms an almost equal thickness rotating water ring along the inner wall of the pump under the action of centrifugal force. The inner surface of the water ring and the outer surface of the impeller hub form a crescent working cavity, which is divided into cavities of different sizes by the impeller blades. The volume of the first half rotating cavity gradually expands, the gas is inhaled from the outside, the volume of the second half rotating cavity gradually decreases, and the gas is compressed and discharged. Thus, 3 working stages of suction, compression and exhaust are completed.


1. Soil purification, disinfection, dehydration, Filtration, extrusion / vacuum forming, dipping, extraction,

pressure swing adsorption decarbonization, hydrogen extracting, oxygen producing, purification and etc.

2. Desulfurization device in fly ash treatment;

3. Acetylene and other flammable and explosive special gas compression, CHINAMFG compression

4. Pulp and paper industry;

5. Gas recovery field;

6.Condenser vacuum suction usage;

Cause and removal of scaling

With the development from acid papermaking to neutral papermaking, the scaling of papermaking water ring vacuum pump is a problem often encountered by every papermaking enterprise, whether in the South or the north. Scaling is a process, which is not generated at once. With the generation of scaling substances, its impact on the paper machine is gradually emerging. Therefore, we should not take it lightly. We should persevere and prevent scaling from the beginning, which will produce long-term benefits.
1. Scaling causes:
(1) High pH value and high hardness.
(2) The sealing degree of papermaking white water increases, the content of insoluble matter is high, and the scaling ion accumulates.
(3) Extensive use of fillers.
(4) Temperature. The water temperature rises and the cooling system does not work well.
2. Adverse effects on papermaking:
(1) Seriously reduce the vacuum degree and air extraction.
(2) The motor current increases, resulting in increased power consumption.

(3) It often causes the problems that the vacuum pump is stuck, it is difficult to start, the paper machine stops and the vacuum pump dare not stop.
(4) Frequent pickling or manual disassembly will not only damage the equipment, but also damage the equipment accuracy, resulting in the failure of vacuum formation or the reduction of vacuum degree.
(1)The hardness of water must be reduced as much as possible and the working temperature of circulating water must be controlled. During the operation of circulating cooling water, the return water temperature and return water volume of each pump shall be tested to ensure that the normal water supply and return water temperature of each pump do not exceed 40 ºC
(2) The pump body drainage valve of the water ring vacuum pump is not only used to normally discharge the accumulated water in the pump, but also can regularly flush the dirt and water in the pump by using the water pressure of the pump body during operation. On the 1 hand, it can prevent the accumulation of dirt and on the other hand, it can also prevent the conversion of water slag into scale.

Company Profile

Established in 2571, CHINAMFG Group is a comprehensive company integrating plHangZhou, design, technical support, production, testing and training. We have a professional technical team to provide you with professional design and technical support as well as the best source of goods. After more than 10 years of efforts, our products have been exported to 96 countries, and have more than 300 paper plants customers.
If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking CHINAMFG to forming successful business relationships with new clients around the world in the future.


After-sales Service: Warranty
Warranty: 1 Year
Certification: ISO 9001:2000, ISO 9001:2008
Surface Treatment: Polishing
Manufacturing Process: Casting
Material: Stainless Steel


vacuum pump

How Are Vacuum Pumps Employed in the Production of Electronic Components?

Vacuum pumps play a crucial role in the production of electronic components. Here’s a detailed explanation:

The production of electronic components often requires controlled environments with low or no atmospheric pressure. Vacuum pumps are employed in various stages of the production process to create and maintain these vacuum conditions. Here are some key ways in which vacuum pumps are used in the production of electronic components:

1. Deposition Processes: Vacuum pumps are extensively used in deposition processes, such as physical vapor deposition (PVD) and chemical vapor deposition (CVD), which are commonly employed for thin film deposition on electronic components. These processes involve the deposition of materials onto substrates in a vacuum chamber. Vacuum pumps help create and maintain the necessary vacuum conditions required for precise and controlled deposition of the thin films.

2. Etching and Cleaning: Etching and cleaning processes are essential in the fabrication of electronic components. Vacuum pumps are used to create a vacuum environment in etching and cleaning chambers, where reactive gases or plasmas are employed to remove unwanted materials or residues from the surfaces of the components. The vacuum pumps help evacuate the chamber and ensure the efficient removal of byproducts and waste gases.

3. Drying and Bake-out: Vacuum pumps are utilized in the drying and bake-out processes of electronic components. After wet processes, such as cleaning or wet etching, components need to be dried thoroughly. Vacuum pumps help create a vacuum environment that facilitates the removal of moisture or solvents from the components, ensuring their dryness before subsequent processing steps. Additionally, vacuum bake-out is employed to remove moisture or other contaminants trapped within the components’ materials or structures, enhancing their reliability and performance.

4. Encapsulation and Packaging: Vacuum pumps are involved in the encapsulation and packaging stages of electronic component production. These processes often require the use of vacuum-sealed packaging to protect the components from environmental factors such as moisture, dust, or oxidation. Vacuum pumps assist in evacuating the packaging materials, creating a vacuum-sealed environment that helps maintain the integrity and longevity of the electronic components.

5. Testing and Quality Control: Vacuum pumps are utilized in testing and quality control processes for electronic components. Some types of testing, such as hermeticity testing, require the creation of a vacuum environment for evaluating the sealing integrity of electronic packages. Vacuum pumps help evacuate the testing chambers, ensuring accurate and reliable test results.

6. Soldering and Brazing: Vacuum pumps play a role in soldering and brazing processes for joining electronic components and assemblies. Vacuum soldering is a technique used to achieve high-quality solder joints by removing air and reducing the risk of voids, flux residuals, or oxidation. Vacuum pumps assist in evacuating the soldering chambers, creating the required vacuum conditions for precise and reliable soldering or brazing.

7. Surface Treatment: Vacuum pumps are employed in surface treatment processes for electronic components. These processes include plasma cleaning, surface activation, or surface modification techniques. Vacuum pumps help create the necessary vacuum environment where plasma or reactive gases are used to treat the component surfaces, improving adhesion, promoting bonding, or altering surface properties.

It’s important to note that different types of vacuum pumps may be used in electronic component production, depending on the specific process requirements. Commonly used vacuum pump technologies include rotary vane pumps, turbo pumps, cryogenic pumps, and dry pumps.

In summary, vacuum pumps are essential in the production of electronic components, facilitating deposition processes, etching and cleaning operations, drying and bake-out stages, encapsulation and packaging, testing and quality control, soldering and brazing, as well as surface treatment. They enable the creation and maintenance of controlled vacuum environments, ensuring precise and reliable manufacturing processes for electronic components.

vacuum pump

How Do Vacuum Pumps Impact the Quality of 3D Printing?

Vacuum pumps play a significant role in improving the quality and performance of 3D printing processes. Here’s a detailed explanation:

3D printing, also known as additive manufacturing, is a process of creating three-dimensional objects by depositing successive layers of material. Vacuum pumps are utilized in various aspects of 3D printing to enhance the overall quality, accuracy, and reliability of printed parts. Here are some key ways in which vacuum pumps impact 3D printing:

1. Material Handling and Filtration: Vacuum pumps are used in 3D printing systems to handle and control the flow of materials. They create the necessary suction force to transport powdered materials, such as polymers or metal powders, from storage containers to the printing chamber. Vacuum systems also assist in filtering and removing unwanted particles or impurities from the material, ensuring the purity and consistency of the feedstock. This helps to prevent clogging or contamination issues during the printing process.

2. Build Plate Adhesion: Proper adhesion of the printed object to the build plate is crucial for achieving dimensional accuracy and preventing warping or detachment during the printing process. Vacuum pumps are employed to create a vacuum environment or suction force that securely holds the build plate and ensures firm adhesion between the first layer of the printed object and the build surface. This promotes stability and minimizes the risk of layer shifting or deformation during the printing process.

3. Material Drying: Many 3D printing materials, such as filament or powdered polymers, can absorb moisture from the surrounding environment. Moisture-contaminated materials can lead to poor print quality, reduced mechanical properties, or defects in the printed parts. Vacuum pumps with integrated drying capabilities can be employed to create a low-pressure environment, effectively removing moisture from the materials before they are used in the printing process. This ensures the dryness and quality of the materials, resulting in improved print outcomes.

4. Resin Handling in Stereolithography (SLA): In SLA 3D printing, a liquid resin is selectively cured using light sources to create the desired object. Vacuum pumps are utilized to facilitate the resin handling process. They can be employed to degas or remove air bubbles from the liquid resin, ensuring a smooth and bubble-free flow during material dispensing. This helps to prevent defects and imperfections caused by trapped air or bubbles in the final printed part.

5. Enclosure Pressure Control: Some 3D printing processes, such as selective laser sintering (SLS) or binder jetting, require the printing chamber to be maintained at a specific pressure or controlled atmosphere. Vacuum pumps are used to create a controlled low-pressure or vacuum environment within the printing chamber, enabling precise pressure regulation and maintaining the desired conditions for optimal printing results. This control over the printing environment helps to prevent oxidation, improve material flow, and enhance the quality and consistency of printed parts.

6. Post-Processing and Cleaning: Vacuum pumps can also aid in post-processing steps and cleaning of 3D printed parts. For instance, in processes like support material removal or surface finishing, vacuum systems can assist in the removal of residual support structures or excess powder from printed objects. They can also be employed in vacuum-based cleaning methods, such as vapor smoothing, to achieve smoother surface finishes and enhance the aesthetics of the printed parts.

7. System Maintenance and Filtration: Vacuum pumps used in 3D printing systems require regular maintenance and proper filtration to ensure their efficient and reliable operation. Effective filtration systems within the vacuum pumps help to remove any contaminants or particles generated during printing, preventing their circulation and potential deposition on the printed parts. This helps to maintain the cleanliness of the printing environment and minimize the risk of defects or impurities in the final printed objects.

In summary, vacuum pumps have a significant impact on the quality of 3D printing. They contribute to material handling and filtration, build plate adhesion, material drying, resin handling in SLA, enclosure pressure control, post-processing and cleaning, as well as system maintenance and filtration. By utilizing vacuum pumps in these critical areas, 3D printing processes can achieve improved accuracy, dimensional stability, material quality, and overall print quality.

vacuum pump

How Are Vacuum Pumps Different from Air Compressors?

Vacuum pumps and air compressors are both mechanical devices used to manipulate air and gas, but they serve opposite purposes. Here’s a detailed explanation of their differences:

1. Function:

– Vacuum Pumps: Vacuum pumps are designed to remove or reduce the pressure within a closed system, creating a vacuum or low-pressure environment. They extract air or gas from a chamber, creating suction or negative pressure.

– Air Compressors: Air compressors, on the other hand, are used to increase the pressure of air or gas. They take in ambient air or gas and compress it, resulting in higher pressure and a compacted volume of air or gas.

2. Pressure Range:

– Vacuum Pumps: Vacuum pumps are capable of generating pressures below atmospheric pressure or absolute zero pressure. The pressure range typically extends into the negative range, expressed in units such as torr or pascal.

– Air Compressors: Air compressors, on the contrary, operate in the positive pressure range. They increase the pressure above atmospheric pressure, typically measured in units like pounds per square inch (psi) or bar.

3. Applications:

– Vacuum Pumps: Vacuum pumps have various applications where the creation of a vacuum or low-pressure environment is required. They are used in processes such as vacuum distillation, vacuum drying, vacuum packaging, and vacuum filtration. They are also essential in scientific research, semiconductor manufacturing, medical suction devices, and many other industries.

– Air Compressors: Air compressors find applications where compressed air or gas at high pressure is needed. They are used in pneumatic tools, manufacturing processes, air conditioning systems, power generation, and inflating tires. Compressed air is versatile and can be employed in numerous industrial and commercial applications.

4. Design and Mechanism:

– Vacuum Pumps: Vacuum pumps are designed to create a vacuum by removing air or gas from a closed system. They may use mechanisms such as positive displacement, entrapment, or momentum transfer to achieve the desired vacuum level. Examples of vacuum pump types include rotary vane pumps, diaphragm pumps, and diffusion pumps.

– Air Compressors: Air compressors are engineered to compress air or gas, increasing its pressure and decreasing its volume. They use mechanisms like reciprocating pistons, rotary screws, or centrifugal force to compress the air or gas. Common types of air compressors include reciprocating compressors, rotary screw compressors, and centrifugal compressors.

5. Direction of Air/Gas Flow:

– Vacuum Pumps: Vacuum pumps draw air or gas into the pump and then expel it from the system, creating a vacuum within the chamber or system being evacuated.

– Air Compressors: Air compressors take in ambient air or gas and compress it, increasing its pressure and storing it in a tank or delivering it directly to the desired application.

While vacuum pumps and air compressors have different functions and operate under distinct pressure ranges, they are both vital in various industries and applications. Vacuum pumps create and maintain a vacuum or low-pressure environment, while air compressors compress air or gas to higher pressures for different uses and processes.

China high quality Vacuum Water Pump for Paper Mill   vacuum pump ac system	China high quality Vacuum Water Pump for Paper Mill   vacuum pump ac system
editor by CX 2023-11-22

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