Product Description
Working principle
Roots vacuum pump is a kind of rotary positive-displacement type of pump. The 2 three-lobe rotors keep a certain gap with the housing, and the 2 rotors mesh with each other and keep a certain gap when they rotate in the housing through a pair of synchronous reverse rotation high-precision gears. The diagram on the right shows the structure principle of the pump, from diagram I to IV, the rotor rotates in the house and completes 1 suction and discharge process.
The Roots vacuum pump with three-lobe rotors has technical advantages over the traditional two-lobe rotors in terms of pumping efficiency, maximum allowable differential pressure, temperature, vibration, noise and other major performances.
Main features
Compared with the traditional two-lobe Roots vacuum pump, there are below advantages:
1. Much higher efficiency, lower temperature, vibration and noise.
2. More stable and reliable, more convenient to use and maintain.
Other features:
1. Lower failure due to the rotors are fixed and no axial run-out.
2. High-precision transmission gear and precision rolling bearing are used, resulting in low noise and smooth operation.
3. The main shaft use special mechanical seal to ensure oil-free pump chamber.
7. Mechanical seal, oil seal, piston ring labyrinth seal and other types of seal can be used for end cover.
8. It is used in pump combinations together with rotary vane vacuum pump, reciprocating pump, liquid ring pump, dry screw pump and other types of backing pumps to meet various process requirements.
Applications
The advantage of Roots vacuum pump is that it has large pumping efficiency even at low inlet pressure, but ordinary Roots vacuum pump can’t be used alone, it must be used in pump combinations together with the backing pumps. The Roots vacuum pump can be started only after the pressure in the system is pumped to the allowable starting pressure of the Roots vacuum pump by the backing pump.
According to different working pressure and process conditions, the backing pump of Roots vacuum pump can be rotary vane vacuum pump, liquid ring vacuum pump, dry screw vacuum pump and so on. The performance of Roots vacuum pumps are different when combination with different backing pumps.
Roots vacuum pumps are mainly used in any vacuum system requiring large pumping speed and rough and medium vacuum (103-10-2Pa), such as: vacuum coating, vacuum welding furnace, vacuum heat treatment furnace, large space simulation test, microelectronics and integrated circuits, lamp and bulb manufacturing, laser manufacturing, vacuum packaging, centralized pumping system, various chemical processing, vacuum degassing vacuum deaeration, vacuum dehydration, vacuum CHINAMFG drying, vacuum distillation.
Product Parameters
| Model | Nominal pumping speed(50Hz) | Ultimate pressure | Maximum allowable pressure difference | Nominal motor rating (50Hz) | Nominal motor speed (50Hz) | Suction Connection size | Discharge Connection size | Weight | Backing pump recommended |
| L/s | Pa | Pa | Kw | rpm | mm | mm | Kg | ||
| ZJT-70 | 70 | ≤0.5 | ≥1.2*104 | 1.5 | 1450 | 100 | 80 | 165 | DVP180 or DSP140 |
| ZJT-150 | 150 | ≤0.5 | ≥1*104 | 3 | 2900 | 100 | 80 | 165 | DVP360 or DSP280 |
| ZJT-300 | 300 | ≤0.5 | ≥8*103 | 4 | 2900 | 160 | 100 | 275 | DVP540 or DSP540 |
| ZJT-600 | 600 | ≤0.5 | ≥6*103 | 5.5 | 2900 | 200 | 160 | 420 | DVP540 or DSP540 |
| ZJT-1200 | 1200 | ≤0.05 | ≥5*103 | 11 | 2900 | 250 | 200 | 980 | ZJTQ-300+DVP540 |
| ZJT-2500 | 2500 | ≤0.05 | ≥4*103 | 18.5 | 2900 | 320 | 250 | 1800 | ZJTQ-600+DVP540 |
| ZJT-5000 | 5000 | ≤0.05 | ≥3*103 | 37 | 1450 | 300 | 300 | 3580 | ZJTQ-1200+DVP800 |
Note:
1. The pumping speed refers to the maximum pumping speed measured at the inlet pressure of the Roots vacuum pump in the range of 67 pa to 2.67 pa under the conditions of the recommended backing pump. (see p Pumping speed diagram)
2. The ultimate pressure is the lowest value of the stable air partial pressure measured at the pump inlet with a compression vacuum gauge after full pumping without any additional container and no air inlet under the condition of the recommended backing pump.
3. The data of the above table is obtained under the condition of using the recommended backing pump, users can choose different backing vacuum pumps according to different situations, but the main performance index will be changed.
Pressure diagram
Dimension
| Model | L | L1 | L2 | L3 | H | H1 | H2 | H3 | A | A1 | A2 | D | D1 | D2 | N-M | d | d1 | d2 | n-m |
| ZJT-70 | 730 | 191 | 330 | 360 | 270 | 252 | 40 | 256 | 214 | Ф80 | Ф125 | Ф145 | 8-M8 | Ф50 | Ф90 | Ф110 | 4-M8 | ||
| ZJT-150 | 938 . | 273 | 132 | 184 | 350 | 330 | 116.5 | 30 | 392 | 358 | 300 | Ф100 | Ф145 | Ф165 | 8-M8 | Ф80 | Ф125 | Ф145 | 8-M8 |
| ZJT-300 | 1032 | 323 | 185 | 259 | 405 | 385 | 135 | 40 | 455 | 420 | 350 | Ф150 | Ф200 | Ф225 | 8-M10 | Ф100 | Ф145 | Ф165 | 8-M8 |
| ZJT-600 | 1282 | 405 | 220 | 304 | 520 | 495 | 165 | 35 | 587 | 548 | 450 | Ф200 | Ф260 | Ф285 | 12-M10 | Ф150 | Ф200 | Ф225 | 8-M10 |
| ZJT-1200 | 1573 | 473 | 296 | 392 | 650 | 625 | 218.5 | 58 | 722 | 678 | 560 | Ф250 | Ф310 | Ф335 | 12-M10 | Ф200 | Ф260 | Ф285 | 12-M10 |
| ZJT-2500 | 1890 | 594 | 440 | 552 | 730 | 700 | 220 | 55 | 858 | 810 | 660 | Ф320 | Ф395 | Ф425 | 12-M12 | Ф250 | Ф310 | Ф335 | 12-M10 |
FAQ
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.
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| After-sales Service: | Online Video Instruction |
|---|---|
| Warranty: | 1 Year |
| Oil or Not: | Oil Free |
| Structure: | Rotary Vacuum Pump |
| Nominal Pumping Speed(50Hz): | 300 L/S |
| Ultimate Pressure: | 0.5 PA |
What Are the Advantages of Using Oil-Sealed Vacuum Pumps?
Oil-sealed vacuum pumps offer several advantages in various applications. Here’s a detailed explanation:
1. High Vacuum Performance: Oil-sealed vacuum pumps are known for their ability to achieve high levels of vacuum. They can create and maintain deep vacuum levels, making them suitable for applications that require a low-pressure environment. The use of oil as a sealing and lubricating medium helps in achieving efficient vacuum performance.
2. Wide Operating Range: Oil-sealed vacuum pumps have a wide operating range, allowing them to handle a broad spectrum of vacuum levels. They can operate effectively in both low-pressure and high-vacuum conditions, making them versatile for different applications across various industries.
3. Efficient and Reliable Operation: These pumps are known for their reliability and consistent performance. The oil-sealed design provides effective sealing, preventing air leakage and maintaining a stable vacuum level. They are designed to operate continuously for extended periods without significant performance degradation, making them suitable for continuous industrial processes.
4. Contamination Handling: Oil-sealed vacuum pumps are effective in handling certain types of contaminants that may be present in the process gases or air being evacuated. The oil acts as a barrier, trapping and absorbing certain particulates, moisture, and chemical vapors, preventing them from reaching the pump mechanism. This helps protect the pump internals from potential damage and contributes to the longevity of the pump.
5. Thermal Stability: The presence of oil in these pumps helps in dissipating heat generated during operation, contributing to their thermal stability. The oil absorbs and carries away heat, preventing excessive temperature rise within the pump. This thermal stability allows for consistent performance even during prolonged operation and helps protect the pump from overheating.
6. Noise Reduction: Oil-sealed vacuum pumps generally operate at lower noise levels compared to other types of vacuum pumps. The oil acts as a noise-damping medium, reducing the noise generated by the moving parts and the interaction of gases within the pump. This makes them suitable for applications where noise reduction is desired, such as laboratory environments or noise-sensitive industrial settings.
7. Versatility: Oil-sealed vacuum pumps are versatile and can handle a wide range of gases and vapors. They can effectively handle both condensable and non-condensable gases, making them suitable for diverse applications in industries such as chemical processing, pharmaceuticals, food processing, and research laboratories.
8. Cost-Effective: Oil-sealed vacuum pumps are often considered cost-effective options for many applications. They generally have a lower initial cost compared to some other types of high-vacuum pumps. Additionally, the maintenance and operating costs are relatively lower, making them an economical choice for industries that require reliable vacuum performance.
9. Simplicity and Ease of Maintenance: Oil-sealed vacuum pumps are relatively simple in design and easy to maintain. Routine maintenance typically involves monitoring oil levels, changing the oil periodically, and inspecting and replacing worn-out parts as necessary. The simplicity of maintenance procedures contributes to the overall cost-effectiveness and ease of operation.
10. Compatibility with Other Equipment: Oil-sealed vacuum pumps are compatible with various process equipment and systems. They can be easily integrated into existing setups or used in conjunction with other vacuum-related equipment, such as vacuum chambers, distillation systems, or industrial process equipment.
These advantages make oil-sealed vacuum pumps a popular choice in many industries where reliable, high-performance vacuum systems are required. However, it’s important to consider specific application requirements and consult with experts to determine the most suitable type of vacuum pump for a particular use case.
Considerations for Selecting a Vacuum Pump for Cleanroom Applications
When it comes to selecting a vacuum pump for cleanroom applications, several considerations should be taken into account. Here’s a detailed explanation:
Cleanrooms are controlled environments used in industries such as semiconductor manufacturing, pharmaceuticals, biotechnology, and microelectronics. These environments require strict adherence to cleanliness and particle control standards to prevent contamination of sensitive processes or products. Selecting the right vacuum pump for cleanroom applications is crucial to maintain the required level of cleanliness and minimize the introduction of contaminants. Here are some key considerations:
1. Cleanliness: The cleanliness of the vacuum pump is of utmost importance in cleanroom applications. The pump should be designed and constructed to minimize the generation and release of particles, oil vapors, or other contaminants into the cleanroom environment. Oil-free or dry vacuum pumps are commonly preferred in cleanroom applications as they eliminate the risk of oil contamination. Additionally, pumps with smooth surfaces and minimal crevices are easier to clean and maintain, reducing the potential for particle buildup.
2. Outgassing: Outgassing refers to the release of gases or vapors from the surfaces of materials, including the vacuum pump itself. In cleanroom applications, it is crucial to select a vacuum pump with low outgassing characteristics to prevent the introduction of contaminants into the environment. Vacuum pumps specifically designed for cleanroom use often undergo special treatments or use materials with low outgassing properties to minimize this effect.
3. Particle Generation: Vacuum pumps can generate particles due to the friction and wear of moving parts, such as rotors or vanes. These particles can become a source of contamination in cleanrooms. When selecting a vacuum pump for cleanroom applications, it is essential to consider the pump’s particle generation level and choose pumps that have been designed and tested to minimize particle emissions. Pumps with features like self-lubricating materials or advanced sealing mechanisms can help reduce particle generation.
4. Filtration and Exhaust Systems: The filtration and exhaust systems associated with the vacuum pump are critical for maintaining cleanroom standards. The vacuum pump should be equipped with efficient filters that can capture and remove any particles or contaminants generated during operation. High-quality filters, such as HEPA (High-Efficiency Particulate Air) filters, can effectively trap even the smallest particles. The exhaust system should be properly designed to ensure that filtered air is released outside the cleanroom or passes through additional filtration before being reintroduced into the environment.
5. Noise and Vibrations: Noise and vibrations generated by vacuum pumps can have an impact on cleanroom operations. Excessive noise can affect the working environment and compromise communication, while vibrations can potentially disrupt sensitive processes or equipment. It is advisable to choose vacuum pumps specifically designed for quiet operation and that incorporate measures to minimize vibrations. Pumps with noise-dampening features and vibration isolation systems can help maintain a quiet and stable cleanroom environment.
6. Compliance with Standards: Cleanroom applications often have specific industry standards or regulations that must be followed. When selecting a vacuum pump, it is important to ensure that it complies with relevant cleanroom standards and requirements. Considerations may include ISO cleanliness standards, cleanroom classification levels, and industry-specific guidelines for particle count, outgassing levels, or allowable noise levels. Manufacturers that provide documentation and certifications related to cleanroom suitability can help demonstrate compliance.
7. Maintenance and Serviceability: Proper maintenance and regular servicing of vacuum pumps are essential for their reliable and efficient operation. When choosing a vacuum pump for cleanroom applications, consider factors such as ease of maintenance, availability of spare parts, and access to service and support from the manufacturer. Pumps with user-friendly maintenance features, clear service instructions, and a responsive customer support network can help minimize downtime and ensure continued cleanroom performance.
In summary, selecting a vacuum pump for cleanroom applications requires careful consideration of factors such as cleanliness, outgassing characteristics, particle generation, filtration and exhaust systems, noise and vibrations, compliance with standards, and maintenance requirements. By choosing vacuum pumps designed specifically for cleanroom use and considering these key factors, cleanroom operators can maintain the required level of cleanliness and minimize the risk of contamination in their critical processes and products.
What Industries Commonly Rely on Vacuum Pump Technology?
Vacuum pump technology finds applications in various industries where creating and controlling vacuum or low-pressure environments is crucial. Here’s a detailed explanation:
1. Manufacturing and Production: Vacuum pumps are extensively used in manufacturing and production processes across multiple industries. They are employed for tasks such as vacuum molding, vacuum packaging, vacuum degassing, vacuum drying, and vacuum distillation. Industries like automotive, aerospace, electronics, pharmaceuticals, and food processing rely on vacuum pump technology to achieve precise and controlled manufacturing conditions.
2. Chemical and Pharmaceutical: The chemical and pharmaceutical industries heavily rely on vacuum pumps for numerous applications. These include solvent recovery, vacuum filtration, vacuum drying, distillation, crystallization, and evaporation. Vacuum pumps enable these industries to carry out critical processes under reduced pressure, ensuring efficient separation, purification, and synthesis of various chemical compounds and pharmaceutical products.
3. Semiconductor and Electronics: The semiconductor and electronics industries extensively use vacuum pumps for manufacturing microchips, electronic components, and electronic devices. Vacuum pumps are crucial in processes such as physical vapor deposition (PVD), chemical vapor deposition (CVD), etching, ion implantation, and sputtering. These processes require controlled vacuum conditions to ensure precise deposition, surface modification, and contamination-free manufacturing.
4. Research and Development: Vacuum pump technology is integral to research and development activities across scientific disciplines. It supports experiments and investigations in fields such as physics, chemistry, materials science, biology, and environmental science. Vacuum pumps facilitate processes like freeze drying, vacuum distillation, vacuum evaporation, vacuum spectroscopy, and creating controlled atmospheric conditions for studying various phenomena.
5. Food and Beverage: The food and beverage industry relies on vacuum pumps for packaging and preservation purposes. Vacuum sealing is used to extend the shelf life of food products by removing air and creating a vacuum-sealed environment that inhibits spoilage and maintains freshness. Vacuum pumps are also used in processes like freeze drying, vacuum concentration, and vacuum cooling.
6. Oil and Gas: In the oil and gas industry, vacuum pumps play a role in various applications. They are used for crude oil vacuum distillation, vacuum drying, vapor recovery, gas compression, and gas stripping processes. Vacuum pumps help maintain optimal conditions during oil refining, gas processing, and petrochemical manufacturing.
7. Environmental and Waste Management: Vacuum pumps are employed in environmental and waste management applications. They are used for tasks such as soil vapor extraction, groundwater remediation, landfill gas recovery, and wastewater treatment. Vacuum pumps facilitate the removal and containment of gases, vapors, and pollutants, contributing to environmental protection and sustainable waste management.
8. Medical and Healthcare: The medical and healthcare sectors utilize vacuum pumps for various purposes. They are used in medical equipment such as vacuum-assisted wound therapy devices, vacuum-based laboratory analyzers, and vacuum suction systems in hospitals and clinics. Vacuum pumps are also used in medical research, pharmaceutical production, and medical device manufacturing.
9. Power Generation: Vacuum pumps play a role in power generation industries, including nuclear power plants and thermal power plants. They are used for steam condensation, turbine blade cooling, vacuum drying during transformer manufacturing, and vacuum systems for testing and maintenance of power plant equipment.
10. HVAC and Refrigeration: The HVAC (Heating, Ventilation, and Air Conditioning) and refrigeration industries rely on vacuum pumps for system installation, maintenance, and repair. Vacuum pumps are used to evacuate air and moisture from refrigerant lines and HVAC systems, ensuring optimal system performance and efficiency.
These are just a few examples of industries that commonly rely on vacuum pump technology. The versatility and wide-ranging applications of vacuum pumps make them indispensable tools across numerous sectors, enabling precise control over vacuum conditions, efficient manufacturing processes, and scientific investigations.
editor by CX 2024-04-13