Descrição do produto
Working principle
The vacuum in dry screw pumps is created through 2 parallel-arranged screw rotors that rotate in opposite directions. These rotors trap the gas coming in through the inlet and deliver it to the gas discharge or pressure side. As the gas is getting compressed, there is no contact between the rotors. This does away with any need for the compression chamber to have any operating fluids or lubrication.
The lubricant used to lubricate the gears and shaft seal is sealed in the gearbox by the shaft seal. The pump can be cooled either directly by circulating cooling water or by a cooling unit with fan and radiator.
The dry screw vacuum pump adopts a special rotor pitch design, compared with the ordinary rotor pitch design, reduce the energy consumption by about 30%, the temperature rise of the exhaust end is reduced by about 100 ºC, the reliability and stability of the operation of the product is greatly improved, can be suitable for any working conditions of vacuum.
The dry screw pumps can be widely used in solvent recovery, vacuum drying, concentration, crystallization, distillation and other processes in the chemical and pharmaceutical industries, vacuum extrusion and molding in the plastic and rubber industries, vacuum degassing in the metallurgical industry; vacuum degassing and drying in the solar energy, microelectronics, lithium battery and other industries.
Pump body and end caps: high-strength cast iron.
Pump body and end caps: high strength cast iron.
Screw rotor: ductile cast iron.
Anti-corrosion coating: corrosion-resistant Hastelloy.
Synchronous gears: alloy steel.
Radial lip seal: imported PTFE mixture or
high-temperature resistant fluorine rubber;
Seal bushings: stainless steel surface covered with ceramic.
Flow chart
Main features
1. The screw rotor is designed with variable pitch structure, the ultimate vacuum can reach below 1Pa, which can meet all kinds of vacuum processing from atmosphere to high vacuum.
2. Oil free – Adapt to various special working conditions for reliable use.
3. It can operate reliably in the pressure range from atmosphere to several Pa.
4. No friction between moving parts, simple structure, lower operation and maintenance cost.
5. Nitrogen seal and composite seal design is optional, which has the benefit of good reliability, low cost of use, simple maintenance.
6. The rotor is dynamically balanced at high speed and the motor is connected by flange, with high concentricity, low vibration and low noise.
7. Hastelloy anti-corrosion coating is optional for rotor surface, condensable material is not easy to condense in the pump cavity, better corrosion resistance.
8. Compared with oil seal pump, liquid ring pump, there is no waste gas, no waste liquid, no waste oil emission, energy saving and environmental friendly.
It can be used alone or with Roots vacuum pump, air-cooled Roots vacuum pump, molecular vacuum pump, etc. to obtain an oil-free high vacuum system.
The benefit of dry screw vacuum pump compared to liquid ring vacuum pump:
-Shorten the process cycle and improve production efficiency
-Reduce water consumption
-Save energy
-Improve product quality
-Can recover solvent by reducing the drying time of products
-Reduce the cost of wastewater and waste gas treatment
A CASE in a pharmaceutical factory
Process introduction:The penicillin sodium salt solution is fed into the crystallization tank through vacuum. By steam heating, agitator stirring, and adding butanol, the water and butanol in the penicillin solution are pumped into the condenser and condensed into the liquid collecting tank, which can be reused.
Process requirements:
1. The volume of crystallization tank is 7.5m3, and about 4.5m3 penicillin solution is added in the process.
2. Before entering the crystallization tank, the water content of penicillin solution is about 20%, and after crystallization, the water content is required to be about 1%.
3. Vacuum feeding for 2h, then adding butanol for 30min, and then starting to crystallize. The process requires low temperature and fast speed, and the lower the temperature, the better the quality of penicillin. The shorter the reaction time, the better.
4. Vacuum degree requirements: the vacuum degree shall be kept above -0.097MPa. High vacuum degree can reduce the reaction temperature and shorten the reaction time.
The previous vacuum system was 2BE1252+air ejector, which is now transformed into a dry screw vacuum pump. The comparison table of test data is as follows:
| vacuum system | 2BE1252+ejector | DVP 1600 screw pump |
| Feeding time (h) | 2 | 1.5 |
| Liquid temperature at the beginning of crystallization (ºC) | 31.5 | 16.6 |
| Crystallization time (h) | 6 | 4.5 |
| Time from crystallization to liquid coming out (min) | 30 | 15 |
| Crystal quality | average | good |
| Power consumption (KW) | 45 | 37 |
| Water consumption (m3) | 26.4 | 0.72 |
Economic benefit analysis:
| Cost saving(USD) | Remark | |
| Water consumption and treatment | 130 | Water cost: $0.65/m3, water treatment: 30/m3 |
| Power | 15 | $0.15/Kwh |
| Labor, production efficiency | 43 | Reduced from 6 hour to 4.5 hour |
| Sum up | 188 |
Please contact us for a detailed report of economic benefit analysis for your applications!
Configuration
Standard configuration:
Machine base, pump head, coupling, motor, driving screen, air inlet connector, check valve, vacuum gauge, manual filling valve exhaust port muffler.
Optional accessories:
Inlet filter, inlet condenser, solvent flushing device, nitrogen purging device, nitrogen sealing device, exhaust port condenser, solenoid filling valve, cooling water flow switch, temperature sensor, pressure transmitter.
Applications
| Leak Detection | Metallurgy | Industrial furnace | Lithium Battery |
| Chemical, pharmaceutical | Wind tunnel test | Power Industry | Vacuum coating |
| Microelectronics industry | Drying Process | Packaging and Printing | Solar Energy |
| Exhaust gas recovery |
Product Parameters
Technical data of Variable pitch Dry screw vacuum pump
| Spec. Modelo |
Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Noise level Lp | Maximum cooling water required |
Suction Connection size | Discharge Connection size | Weight (Without Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DVP-180 | 181 | 2 | 4 | 2900 | 82 | 8 | 50 | 40 | 280 |
| DVP-360 | 354 | 2 | 7.5 | 2900 | 83 | 10 | 50 | 40 | 400 |
| DVP-540 | 535 | 2 | 11 | 2900 | 83 | 10 | 50 | 40 | 500 |
| DVP-650 | 645 | 1 | 15 | 2900 | 84 | 20 | 65 | 50 | 600 |
| DVP-800 | 780 | 1 | 22 | 2900 | 86 | 30 | 100 | 80 | 800 |
| DVP-1600 | 1450 | 1 | 37 | 2900 | 86 | 40 | 125 | 100 | 1200 |
Technical data of Constant pitch Dry screw vacuum pump
| Spec. Modelo |
Nominal pumping speed(50Hz) | Ultimate pressure | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Noise level Lp | Maximum cooling water required |
Suction Connection size | Discharge Connection size | Weight (Without Motor) |
| m³/h | Pa | kw | rpm | dB(A) | L/min | mm | mm | Kg | |
| DSP-140 | 143 | 5 | 4 | 2900 | 82 | 10 | 50 | 40 | 240 |
| DSP-280 | 278 | 5 | 7.5 | 2900 | 83 | 20 | 50 | 40 | 350 |
| DSP-540 | 521 | 5 | 15 | 2900 | 83 | 30 | 65 | 50 | 550 |
| DSP-650 | 617 | 5 | 18.5 | 2900 | 84 | 45 | 65 | 50 | 630 |
| DSP-720 | 763 | 5 | 22 | 2900 | 85 | 55 | 80 | 80 | 780 |
| DSP-1000 | 912 | 5 | 30 | 2900 | 86 | 70 | 100 | 80 | 880 |
Note: The cooling water volume of the dry screw vacuum pump provided in the table is the amount under 20ºC room temperature water. When the dry screw vacuum pump uses cooling device, the cooling water will be increased, the difference of inlet and outlet water temperature is generally controlled below 7ºC is appropriate.
Dimensão
PERGUNTAS FREQUENTES
Q: What information should I offer for an inquiry?
A: You can inquire based on the model directly, but it is always recommended that you contact us so that we can help you to check if the pump is the most appropriate for your application.
Q: Can you make a customized vacuum pump?
A: Yes, we can do some special designs to meet customer applications. Such as customized sealing systems, speical surface treatment can be applied for roots vacuum pump and screw vacuum pump. Please contact us if you have special requirements.
Q: I have problems with our vacuum pumps or vacuum systems, can you offer some help?
A: We have application and design engineers with more than 30 years of experience in vacuum applications in different industries and help a lot of customers resolve their problems, such as leakage issues, energy-saving solutions, more environment-friendly vacuum systems, etc. Please contact us and we’ll be very happy if we can offer any help to your vacuum system.
Q: Can you design and make customized vacuum systems?
A: Yes, we are good for this.
Q: What is your MOQ?
A: 1 piece or 1 set.
Q: How about your delivery time?
A: 5-10 working days for the standard vacuum pump if the quantity is below 20 pieces, 20-30 working days for the conventional vacuum system with less than 5 sets. For more quantity or special requirements, please contact us to check the lead time.
Q: What are your payment terms?
A: By T/T, 50% advance payment/deposit and 50% paid before shipment.
Q: How about the warranty?
A: We offer 1-year warranty (except for the wearing parts).
Q: How about the service?
A: We offer remote video technical support. We can send the service engineer to the site for some special requirements.
| Serviço pós-venda: | Online Video Instruction |
|---|---|
| Garantia: | 1 ano |
| Nominal Pumping Speed(50Hz): | 354 M3/H |
| Ultimate Pressure: | 5 PA |
| Nominal Motor Rating(50Hz): | 7.5 Kw |
| Nominal Motor Speed(50Hz): | 2900 Rpm |
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.
As bombas a vácuo podem ser usadas para a remediação do solo e da água subterrânea?
As bombas de vácuo são, de fato, amplamente utilizadas para a remediação de solos e águas subterrâneas. Aqui está uma explicação detalhada:
A remediação do solo e da água subterrânea refere-se ao processo de remoção de contaminantes do solo e da água subterrânea para restaurar a qualidade ambiental e proteger a saúde humana. As bombas de vácuo desempenham um papel crucial em várias técnicas de remediação, facilitando a extração e o tratamento de meios contaminados. Algumas das aplicações comuns das bombas de vácuo na remediação do solo e da água subterrânea incluem:
1. Extração de vapor do solo (SVE): A extração de vapor do solo é uma técnica de remediação amplamente utilizada para contaminantes voláteis presentes na subsuperfície. Ela envolve a extração de vapores do solo aplicando um vácuo na subsuperfície por meio de poços ou trincheiras. As bombas de vácuo criam um gradiente de pressão que induz o movimento dos vapores em direção aos pontos de extração. Os vapores extraídos são então tratados para remover ou destruir os contaminantes. As bombas de vácuo desempenham um papel fundamental na SVE, mantendo a pressão negativa necessária para aumentar a volatilização e a extração de contaminantes do solo.
2. Extração de fase dupla (DPE): A extração de fase dupla é um método de remediação usado para a extração simultânea de líquidos (como água subterrânea) e vapores (como compostos orgânicos voláteis) da subsuperfície. Bombas de vácuo são utilizadas para criar vácuo em poços ou pontos de extração, extraindo as fases líquida e de vapor. A água subterrânea e os vapores extraídos são então separados e tratados adequadamente. As bombas de vácuo são essenciais nos sistemas DPE para a extração eficiente e controlada de contaminantes nas fases líquida e de vapor.
3. Bombeamento e tratamento de águas subterrâneas: As bombas a vácuo também são empregadas na remediação de águas subterrâneas por meio do processo de bombeamento e tratamento. Elas são usadas para extrair águas subterrâneas contaminadas de poços ou trincheiras de recuperação. Ao criar um vácuo ou pressão negativa, as bombas de vácuo facilitam o fluxo da água subterrânea em direção aos pontos de extração. A água subterrânea extraída é então tratada para remover ou neutralizar os contaminantes antes de ser descarregada ou reinjetada no solo. As bombas de vácuo desempenham um papel fundamental na manutenção das taxas de fluxo e dos gradientes hidráulicos necessários para a extração e o tratamento eficazes das águas subterrâneas.
4. Pulverização de ar: A aspersão de ar é uma técnica de remediação usada para tratar águas subterrâneas e solos contaminados com compostos orgânicos voláteis (VOCs). Ela envolve a injeção de ar ou oxigênio na subsuperfície para aumentar a volatilização dos contaminantes. Bombas de vácuo são utilizadas em sistemas de aspersão de ar para criar uma zona de vácuo ou pressão negativa em poços ou pontos ao redor da área contaminada. Isso induz o movimento do ar e do oxigênio pelo solo, facilitando a liberação e a volatilização dos VOCs. As bombas de vácuo são essenciais na aspersão de ar, pois mantêm o gradiente de pressão negativa necessário para a remoção eficaz de contaminantes.
5. Recuperação aprimorada a vácuo: A recuperação aprimorada a vácuo, também conhecida como extração aprimorada a vácuo, é uma técnica de remediação usada para recuperar líquidos em fase não aquosa (NAPLs) ou líquidos densos em fase não aquosa (DNAPLs) da subsuperfície. Bombas de vácuo são empregadas para criar um vácuo ou gradiente de pressão negativa em poços ou trincheiras de recuperação. Isso estimula o movimento e a extração de NAPLs ou DNAPLs em direção aos pontos de recuperação. As bombas de vácuo facilitam a recuperação eficiente desses contaminantes densos, que podem não ser facilmente recuperáveis usando métodos de bombeamento tradicionais.
É importante observar que diferentes tipos de bombas de vácuo, como bombas de palhetas rotativas, bombas de anel líquido ou bombas resfriadas a ar, podem ser usadas na remediação de solos e águas subterrâneas, dependendo dos requisitos específicos da técnica de remediação e da natureza dos contaminantes.
In summary, vacuum pumps play a vital role in various soil and groundwater remediation techniques, including soil vapor extraction, dual-phase extraction, groundwater pumping and treatment, air sparging, and vacuum-enhanced recovery. By creating and maintaining the necessary pressure differentials, vacuum pumps enable the efficient extraction, treatment, and removal of contaminants, contributing to the restoration of soil and groundwater quality.
Can Vacuum Pumps Be Used in Laboratories?
Yes, vacuum pumps are extensively used in laboratories for a wide range of applications. Here’s a detailed explanation:
Vacuum pumps are essential tools in laboratory settings as they enable scientists and researchers to create and control vacuum or low-pressure environments. These controlled conditions are crucial for various scientific processes and experiments. Here are some key reasons why vacuum pumps are used in laboratories:
1. Evaporation and Distillation: Vacuum pumps are frequently used in laboratory evaporation and distillation processes. By creating a vacuum, they lower the boiling point of liquids, allowing for gentler and more controlled evaporation. This is particularly useful for heat-sensitive substances or when precise control over the evaporation process is required.
2. Filtration: Vacuum filtration is a common technique in laboratories for separating solids from liquids or gases. Vacuum pumps create suction, which helps draw the liquid or gas through the filter, leaving the solid particles behind. This method is widely used in processes such as sample preparation, microbiology, and analytical chemistry.
3. Freeze Drying: Vacuum pumps play a crucial role in freeze drying or lyophilization processes. Freeze drying involves removing moisture from a substance while it is in a frozen state, preserving its structure and properties. Vacuum pumps facilitate the sublimation of frozen water directly into vapor, resulting in the removal of moisture under low-pressure conditions.
4. Vacuum Ovens and Chambers: Vacuum pumps are used in conjunction with vacuum ovens and chambers to create controlled low-pressure environments for various applications. Vacuum ovens are used for drying heat-sensitive materials, removing solvents, or conducting reactions under reduced pressure. Vacuum chambers are utilized for testing components under simulated space or high-altitude conditions, degassing materials, or studying vacuum-related phenomena.
5. Analytical Instruments: Many laboratory analytical instruments rely on vacuum pumps to function properly. For example, mass spectrometers, electron microscopes, surface analysis equipment, and other analytical instruments often require vacuum conditions to maintain sample integrity and achieve accurate results.
6. Chemistry and Material Science: Vacuum pumps are employed in numerous chemical and material science experiments. They are used for degassing samples, creating controlled atmospheres, conducting reactions under reduced pressure, or studying gas-phase reactions. Vacuum pumps are also used in thin film deposition techniques like physical vapor deposition (PVD) and chemical vapor deposition (CVD).
7. Vacuum Systems for Experiments: In scientific research, vacuum systems are often designed and constructed for specific experiments or applications. These systems can include multiple vacuum pumps, valves, and chambers to create specialized vacuum environments tailored to the requirements of the experiment.
Overall, vacuum pumps are versatile tools that find extensive use in laboratories across various scientific disciplines. They enable researchers to control and manipulate vacuum or low-pressure conditions, facilitating a wide range of processes, experiments, and analyses. The choice of vacuum pump depends on factors such as required vacuum level, flow rate, chemical compatibility, and specific application needs.
editor by CX 2023-11-21
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