The working principle of the two-stage rotary vane vacuum pump is based on the dynamic characteristics of gas molecules. It forms a periodically changing volume in the pump cavity through a high-speed rotating disc, so as to realize the suction, compression and discharge of gas. In the two-stage rotary vane vacuum pump, the gas is first sucked into the front pump chamber, after initial compression, and then sent into the rear pump chamber for deep compression, and finally reach the required vacuum degree.
Product characteristics:
Excellent performance
Monolithic cylinder structure for higher accuracy,
Proven spinning technology for more stable performance,
Ensure higher system reliability
Good heat dissipation
Air-cooled structure, no external water cooler, reduce system installation and maintenance costs
Forced lubrication
Built-in gear pump and constant pressure oil supply mechanism forced oil supply
Stable and reliable operation under high suction pressure
Multi-stage gas ballast design
To meet the requirements of different customers vacuum degree and water vapor processing capacity
Fluororubber seals
Improve corrosion resistance and solve oil leakage problems
Double anti-return oil structure
Automatic oil return valve to more reliably protect your vacuum system from oil contamination after shutdown
High quality oil mist filter (optional)
Effectively filter oil mist, protect the environment clean
Purchase information
If you are interested in our two-stage rotary vane vacuum pumps, please contact us for more information and a quote.
l Contact number: +8615617875939
l E-mail: gordon@zztainuo.com
l Contact: Gordon Zhang
l Wechat: 15617875939
l WhatsApp: +8613592553141
Technical parameters:
Items |
| VRD-4 | VRD-8 | VRD-16 | VRD-24 |
Pumping speed | 50Hz | m³/h | 4(1.1) | 8(2.2) | 16(4.4) | 24(6.6) |
60Hz | (L/s) | 4.8(1.3) | 9.6(2.6) | 19.2(5.2) | 28.8(7.9) |
Limit partial pressure - closed gas ballast | Pa | 5×10² | 5×10 | 4×10² | 4×10² |
Ultimate full pressure - closed gas ballast | Pa | 5×10 | 5×10 | 4×10¹ | 4×10 |
Ultimate full pressure - open gas ballast | Pa | 10 | 10 | 8×10 | 8×10¹ |
Power source |
| Single/three phase | Single/three phase | Single/three phase | Single/three phase |
Power | kW | 0.4/0.37 | 0.4/0.37 | 0.75/0.55 | 1.1/0.75 |
Class of protection |
| IP44 | IP44 | IP44 | IP44 |
Intake and exhaust port |
| KF16/25 | KF16/25 | KF25 | KF25/40 |
Quantity of oil | L | 0.6~1.0 | 0.6~1.0 | 0.9~1.5 | 1.3~2.0 |
Motor speed (50/60Hz) | rpm | 1440/1720 | 1440/1720 | 1440/1720 | 1440/1720 |
Operating ambient temperature | ℃ | 10-40 | 10-40 | 10-40 | 10-40 |
Noise (50hz) | dB | ≤52 | ≤52 | ≤58 | ≤58 |
Weight | kg | 19 | 21 | 30 | 35 |
Size(L*W*H) | mm | 440x144x217 | 440x144x217 | 530x188x272 | 567x188x272 |
Items |
| VRD-3VRD-0 | VRD-48 | VRD-65 | VRD-90 |
Pumping speed | 50Hz | m³/h (L/s) | 30(8.3) | 48(13.3) | 65(18) | 85(23.6) |
| 60Hz | 36(9.9) | 57.6(16) | 78(21.6) | 102(28.3) |
Limit partial pressure - closed gas ballast | Pa | 4×10² | 4×10 | 4×10² | 4×10² |
Ultimate full pressure - closed gas ballast | Pa | 4×10 | 4×10- | 4×10 | 4×10 |
Ultimate full pressure - open gas ballast | Pa | 8×10 | 1.5 | 1.5 | 1.5 |
Power source |
| Single/three phase | Three phase | Three phase | Three phase |
Power | kW | 1.1 | 1.5 | 2.2 | 3 |
Class of protection |
| IP44 | IP44 | IP44 | IP44 |
Intake and exhaust port |
| KF25/40 | KF40 | KF40 | KF40 |
Quantity of oil | L | 1.3~2.0 | 3.3~4.5 | 3.3~4.5 | 3.3~4.5 |
Motor speed (50/60Hz) | rpm | 1440/1720 | 1440/1720 | 1440/1720 | 1440/1720 |
Operating ambient temperature | ℃ | 10-40 | 10-40 | 10-40 | 10-40 |
Noise (50hz) | dB | ≤58 | ≤62 | ≤62 | ≤65 |
Weight | kg | 43 | 62 | 65 | 65 |
Size(L*W*H) | mm | 567x188x272 | 730x234x358 | 730x234x358 | 730x234x358 |
Main parts：
Component Name | Component Description |
Equipment host | Vacuum pump |
Random accessories | 1 set |
User manual | 1 copy |
Application field:
The application field of two-stage rotary vane vacuum pump is very wide, mainly covering the following aspects:
1. Industrial production
In industrial production, two-stage rotary vane vacuum pumps are widely used in various vacuum treatment processes. These processes include, but are not limited to:
Vacuum drying: In pharmaceutical, chemical, food and other industries, vacuum drying technology is used to remove water or solvents in materials to improve product quality and stability. The two-stage rotary vane vacuum pump ensures a smooth drying process by providing a stable vacuum environment.
Vacuum distillation: In the chemical and pharmaceutical fields, vacuum distillation is a commonly used separation technology. The two-stage rotary vane vacuum pump can create a low pressure environment and reduce the boiling point of the liquid, resulting in an efficient and energy-saving distillation process.
Vacuum concentration: In the food, pharmaceutical and other industries, vacuum concentration technology is used to remove part of the solvent in the solution and improve the concentration of the product. The two-stage rotary vane vacuum pump plays a key role in this process, providing the required vacuum conditions.
2. Scientific research experiments
In the field of scientific research, two-stage rotary vane vacuum pump also has a wide range of applications. They provide the necessary vacuum environment for various scientific research experiments and promote the in-depth development of scientific research. These applications include:
Material preparation: In the field of materials science, two-stage rotary vane vacuum pumps are used to prepare high-quality films, coatings and other materials. By controlling the vacuum degree, the growth rate and structure of the material can be precisely controlled, thus obtaining materials with excellent properties.
Surface analysis: In surface science research, two-stage rotary vane vacuum pumps provide the necessary vacuum conditions for various surface analysis techniques (such as X-ray photoelectron spectroscopy, Auger electron spectroscopy, etc.). These techniques can reveal the chemical composition, electronic structure and other information on the surface of materials, which is of great significance for understanding the properties and applications of materials.
Vacuum coating: During the vacuum coating process, a two-stage rotary vane vacuum pump is used to create a low pressure environment that promotes evaporation and deposition of the coated material. This is essential for the preparation of thin film materials with specific functions and properties.
3. Medical equipment
In the medical field, two-stage rotary vane vacuum pumps also play an important role. They are used in a variety of medical devices to provide strong support for patient treatment. These applications include:
Hemodialysis machine: In the process of hemodialysis, the two-stage rotary vane vacuum pump is used to control the pressure difference between the blood and the dialysate to ensure the smooth progress of the dialysis process.
Ventilator: In a ventilator, a two-stage rotary vane vacuum pump is used to create a stable negative pressure environment to help the patient breathe. This is important for the treatment of respiratory diseases.
To sum up, the two-stage rotary vane vacuum pump has been widely used in many fields such as industrial production, scientific research experiment and medical equipment for its high efficiency and reliable performance. With the continuous progress of science and technology and the rapid development of industry, the application field of two-stage rotary vane vacuum pump will continue to expand and deepen.
Application Case "Introduction to the process of vacuuming the chamber of plasma cleaner using bipolar rotary vane vacuum pump"
Preparation stage: Put the workpiece to be cleaned into the reaction bin of the plasma cleaning machine, and ensure that the workpiece is fixed and stable.
Close the reaction chamber door to ensure a good seal to prevent gas leakage during the vacuum process.
Parameter setting: Set the required working parameters on the control panel of the plasma cleaner, including but not limited to the target pressure of vacuuming, the type and flow of process gas, and the power and time of glow discharge.
Vacuum pumping process: Start the bipolar rotary vane vacuum pump and start vacuum pumping. Bipolar rotary vane vacuum pump through its internal rotor, rotary vane and end cap and other components work together, the gas in the reaction chamber will be extracted to form a vacuum environment.
In the vacuum process, the vacuum pump will continue to extract the gas in the reaction chamber, so that the pressure in the reaction chamber continues to decrease until the set base pressure is reached. The basic pressure is generally set between 300 and 1000Pa, depending on the material and cleaning requirements of the cleaning workpiece.
The bipolar rotary vane vacuum pump has an efficient pumping capacity and the ultimate vacuum degree (generally up to 1.3Pa), which can ensure that the required vacuum degree is reached in the reaction chamber.
Filling process gas: When the pressure in the reaction chamber reaches the base pressure, the process gas begins to be filled. The choice of process gas depends on the material and cleaning requirements of the cleaning workpiece, common process gases include oxygen, argon, nitrogen and so on.
The filling of process gas will temporarily increase the pressure in the reaction chamber, but as the vacuum pump continues to work, the pressure in the reaction chamber will drop again, reaching a temporary dynamic equilibrium state.
Plasma cleaning: After a temporary dynamic equilibrium state is reached, a high frequency voltage is applied, causing the process gas to be broken down and plasma to be generated by glow discharge. The flow of high-energy particles in the plasma will impact the surface of the cleaning workpiece to achieve physical or chemical cleaning.
According to different cleaning workpiece and cleaning requirements, different glow discharge power and glow time can be selected. Under normal circumstances, the cleaning process can last from tens of seconds to tens of minutes.
End stage: After cleaning, cut off the power supply and stop the work of the vacuum pump. Open the reaction chamber door and take out the cleaned workpiece.
Clean the dirt and impurities that may remain inside the reaction chamber and vacuum pump, and prepare for the next cleaning work.
In general, the process of vacuuming the plasma cleaner by the bipolar rotary vane vacuum pump is a complex and fine process, which requires precise control of various parameters and steps to ensure the cleaning effect and the normal operation of the equipment.
