China manufacturer Double Stage Sliding Vane Rotary Vacuum Pump for Vacuum Coating vacuum pump brakes

Product Description

Product Description

2X Rotary Vane Vacuum Pump

Working Principle 
The functional diagram of rotating vane pumps is shown in the figure. The rotating vane pump mainly consists of the stator, rotor, rotary vane, fixed cover, spring and components.
The structure is formed by rotor which eccentrically installed in the chamber of the stator (the outer circle of the stator is tangental to the inner surface of rotor, and the gap between the 2 is very small) and the 2 rotary vanes which adhere to the inner wall of the stator with the assistance of spring tension and centrifugal force and slide in the rotor slot, and when the rotor rotating, the 2 rotary vanes are always sliding along the inner wall of the stator.
The 2 rotary vanes divide the crescent-shape space formed by surrounding by the rotor, chamber of stator and fixed cover into 3 parts A, B and C. When the rotor rotating by the direction shown in the figure, the capacity of space A, which is connected to the air entry, continuously increases, and the pressure in space A continuously gets down.
When the pressure in space A is lower than that in the container in which the gas is pumped, according to the principle of gas pressure balance, the pumped gas is continuously drawn into the suction chamber A, that is the pump is in the process of suction.
At this time, the capacity of the space of chamber B is gradually reduced, the pressure continuously increases, that is the pump is in the process of compression. With the capacity of space C which is connected with the air outlet is further reduces, the pressure in space C further increases.
When the gas pressure is higher than the exhaust pressure, the compressed gas opens the exhaust valve, and the pumped gas continuously pass through the oil layer of the oil tank to the atmosphere. In the continuous running of the pump, it continuously repeats the process of suction, compression, and exhaust, so as to achieve continuous pumping.
The exhaust valve is immersed in the oil to prevent air flowing into the pump. The oil gets into the pump chamber through the gap on the pump body, oil hole and the exhaust valve, to cover the moving surfaces in the chamber and form the seal of the suction chamber and exhaust chamber; in addition, the oil also full up all the harmful space to remove their impact on the ultimate vacuum.

Two-stage sliding vane rotary vacuum pump consists of 2 working chambers which are connected in series and rotating at the same speed by the same direction. Chamberis at a low vacuum level, while chamber is at a high vacuum level. The pumped gas enters chamber through the air inlet. When the intake gas pressure is higher, the gas will be compressed in chamber , so that the pressure rapid increases, and the compressed gas will be not only exhausted from the senior exhaust valve, but also pass through the passage of the intermediate wall and enter chamber , then be compressed in chamber and exhausted from the low-level exhaust valve; when the pressure of the gas entering chamber is low, despite the gas is compressed in chamber, it still can not open the senior exhaust alue to get out. All the gas enters chamber through the passage of the intermediate wall, and by compressed in chamber, it is exhausted from the low-level exhaust valve. Therefore, the ultimate vacuum of the two-stage sliding vane rotary vacuum pump is higher than that of the single-stage sliding vane rotary vacuum pump.

2X Sliding Vane Rotary Vacuum Pump is 1 of the basic equipment for obtaining vacuum for airtight containers by exhausting gas. It can be used alone, or used as the fore pump in front of the booster pump, diffusion pump, molecular pump, etc. This pump is applicable to the vacuum metallurgy, vacuum welding, vacuum impregnation, coating, vacuum drying, as well as the vacuum treatments in chemical and pharmaceutical industry, electric vacuum devices and other industries.

1. The pump can work within the ambient temperature range of 5~40 and under the inlet pressure less than 1330PA. It is also allowable for long-term continuous work.
2. The pump is neither applicable to pump the gases which have excessive oxygen content, poisonous and explosive feature, corrosive effects to etals and chemical reactions with oil of pumps, and dust particles, nor act as a transfer pump to transfer gas form 1 container to another.
3. The continuous working hours of the pump under the inlet air pressure of 6000PA shall not exceed 3min to avoid damages caused by oil injection or bad lubrication.


Model 2X-4A 2X-8A 2X-8 2X-15 2X-30A 2X-70A
Pumping Speed
4 8 8 15 30 70
(≤ Pa)
Ultimate Pressure
≤ 6× 10 -2
Motor Power
0.55 1.1 1.1 2.2 3 5.5
(Degrees C)
Temperature Rise
≤ 4 Degrees C
LW Noise
≤ 75 ≤ 78 ≤ 78 ≤ 80 ≤ 82 ≤ 86
Inlet Diameter
Φ 25 Φ 25 Φ 40 Φ 40 Φ 65 Φ 80
Rotational Speed
450 550 320 320 450 420
Injection Amount of Oil
0.7 0.9 2 2.8 2 4.2
55× 34× 41 55× 43× 44 79× 43× 54 79× 53× 54 78× 50× 56 91× 65× 70
54 70 135 196 240 428

Detailed Photos


Company Profile

ZheZheJiang oto Pump Industrial Co., Ltd. is a professional pump manufacturer integrating R&D, manufacturing, sales and service as a whole, which has been certified by ISO9001 international quality management system. 

Located in Xihu (West Lake) Dis.a Industrial Park, ZheJiang , CHINAMFG Pump Industrial possesses 2 manufacturing bases in ZheJiang and ZHangZhoug. Since our inception, CHINAMFG Pump Industrial has been committed to the innovation and development of various pumps. Our leading products include self-priming trash pump, centrifugal pump, submersible pump, diaphragm pump, vacuum pump, diesel pump, fire pump, etc.




Q: Can I chat with you online? What is your company official website?

Q: What type of company CHINAMFG is? 
A: CHINAMFG is a manufacture and trading company, has factories in ZheJiang and ZHangZhoug, with export and import license.

Q: What kinds of pumps do you supply?
A: Our products including self-priming trash pump, centrifugal pump, diaphragm pump, submersible pump, chemical pump, oil pump, diesel pump, fire fighting pump, etc.

Q: What is your payment terms?
A: Alibaba Trade Assurance, Western Union, Paypal, T/T, L/C, etc.

Q: Can you provide OEM, ODM service?
A: Yes. We have factories in ZheJiang and ZHangZhoug, we can make products according to your requirements.

Q: Why should we buy from you?
A: We are committed to provide best quality products at minimum delivery time and competitive price. We believe this is what customer wants. We are satified until customers are.

Q: What is your warranty period?
A: We provide 1 year of unconditional warranty on our products for the manufacturing defects.

Q: What about delivery time?
A: Normally our production time is within 2 weeks. Please confirm before order.

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After-sales Service: 1 Year
Warranty: 1 Year
Acting Form: Single-Acting
Type: Centrifugal Pump
Displacement: Variable Pump
Performance: No Leak
US$ 150/Piece
1 Piece(Min.Order)




rotary vane pump

What Industries Commonly Rely on Rotary Vane Pumps?

Rotary vane pumps find application in various industries where their characteristics and capabilities are well-suited to meet specific requirements. Here’s a detailed explanation of the industries that commonly rely on rotary vane pumps:

– HVAC and Refrigeration: Rotary vane pumps are widely used in the heating, ventilation, air conditioning, and refrigeration industry. They are utilized for tasks such as evacuating and charging refrigerant systems, recovering refrigerants, and creating the necessary vacuum conditions for efficient operation. Rotary vane pumps provide reliable and efficient performance in HVAC and refrigeration applications.

– Automotive and Manufacturing: The automotive industry and manufacturing sector often rely on rotary vane pumps for various applications. These pumps are used for vacuum-assisted brake systems, fuel vapor recovery, vacuum molding, pick and place operations, and other tasks that require vacuum or pressure generation. Rotary vane pumps’ compact size, versatility, and ability to handle both gas and liquid applications make them suitable for diverse automotive and manufacturing processes.

– Printing and Paper: Rotary vane pumps are utilized in the printing and paper industry for tasks such as paper handling, ink transfer, and vacuum-assisted processes. These pumps provide the necessary vacuum conditions to hold paper in place during printing, enable ink circulation and transfer, and assist in paper transport. Rotary vane pumps’ reliability, efficiency, and ability to handle both dry and wet processes make them valuable in the printing and paper industry.

– Laboratory and Scientific Research: Rotary vane pumps are commonly found in laboratory and scientific research environments. They are used for applications such as vacuum filtration, degassing, rotary evaporation, and other processes requiring precise vacuum control. Rotary vane pumps’ compact design, low noise levels, and compatibility with a wide range of chemicals and solvents make them suitable for laboratory and research applications.

– Food and Beverage: In the food and beverage industry, rotary vane pumps are utilized for tasks such as vacuum packaging, liquid transfer, and product handling. These pumps provide the necessary vacuum conditions for sealing packages, transferring liquids, and maintaining product integrity. Rotary vane pumps’ ability to handle both liquid and gas applications, as well as their hygienic design options, make them suitable for food and beverage processing.

– Environmental and Analytical Instruments: Rotary vane pumps are utilized in environmental monitoring and analytical instruments. They are used for tasks such as sample collection, gas analysis, and air monitoring. These pumps provide the required vacuum conditions for sample collection and analysis, ensuring accurate and reliable results. Rotary vane pumps’ compatibility with a wide range of gases and their ability to handle varying flow rates make them valuable in environmental and analytical applications.

– Medical and Healthcare: The medical and healthcare industry relies on rotary vane pumps for various applications, including vacuum-assisted wound therapy, suction devices, and medical gas systems. These pumps provide the necessary vacuum or pressure conditions required for medical procedures and equipment. Rotary vane pumps’ reliability, compact size, and compatibility with medical gases make them essential in the medical and healthcare sector.

It’s important to note that while rotary vane pumps are commonly used in these industries, specific applications and requirements may vary. Different pump models and configurations may be chosen based on factors such as flow rate, vacuum level, chemical compatibility, and operating conditions.

In summary, rotary vane pumps are relied upon by industries such as HVAC and refrigeration, automotive and manufacturing, printing and paper, laboratory and scientific research, food and beverage, environmental and analytical instruments, and medical and healthcare. Their versatility, efficiency, and ability to handle a wide range of applications make them valuable in these sectors.

rotary vane pump

What Are the Advantages of Using Rotary Vane Pumps?

Rotary vane pumps offer several advantages that make them suitable for various applications. Here’s a detailed explanation of the advantages of using rotary vane pumps:

– Efficient Operation: Rotary vane pumps are known for their efficient operation. They provide a continuous and steady flow of gas or fluid, making them ideal for applications that require a consistent pumping action. The positive displacement mechanism ensures reliable performance, even at varying pressures and viscosities.

– Compact Design: Rotary vane pumps have a compact design, which makes them space-efficient and allows for easy installation in various systems and equipment. Their small footprint is particularly advantageous in applications where space is limited.

– Self-Priming Capability: Rotary vane pumps are typically self-priming, meaning they can evacuate air from the system and create a vacuum without the need for external priming. This feature simplifies the setup process and reduces the time and effort required to start the pump.

– Versatility: Rotary vane pumps are versatile and can handle a wide range of gases and fluids, including air, water, oil, solvents, and chemicals. This versatility makes them suitable for a diverse range of applications across industries such as manufacturing, automotive, pharmaceutical, and HVAC.

– Wide Pressure Range: Rotary vane pumps can operate effectively across a wide pressure range, from low vacuum to moderate positive pressures. They can generate both vacuum and positive pressure, making them adaptable to different process requirements.

– High Vacuum Capability: Rotary vane pumps are capable of achieving high vacuum levels, making them valuable in applications that require precise control of pressure or the creation of a vacuum environment. They can produce vacuum levels up to several millibars or even lower, depending on the specific pump design.

– Reliability and Durability: Rotary vane pumps are known for their reliability and long service life. The robust construction, coupled with proper maintenance and lubrication, ensures durability and extends the operational lifespan of the pump. They can withstand demanding operating conditions and offer consistent performance over time.

– Low Noise and Vibration: Compared to some other types of pumps, rotary vane pumps tend to operate with low noise levels and minimal vibration. This characteristic is advantageous in applications where noise reduction and smooth operation are essential, such as laboratories or residential environments.

– Easy Maintenance: Rotary vane pumps are generally easy to maintain. Routine maintenance tasks typically involve checking and replacing the vanes, inspecting and cleaning the pump chamber, and ensuring proper lubrication. Regular maintenance helps optimize pump performance and prolong its lifespan.

– Cost-Effective: Rotary vane pumps often offer a cost-effective solution for many pumping applications. They are generally more affordable compared to some other types of pumps, making them an attractive choice for budget-conscious users. Additionally, their energy efficiency contributes to cost savings in the long run.

In summary, the advantages of using rotary vane pumps include efficient operation, compact design, self-priming capability, versatility, wide pressure range, high vacuum capability, reliability and durability, low noise and vibration, easy maintenance, and cost-effectiveness. These advantages make rotary vane pumps a popular choice in various industries and applications where reliable and efficient pumping is required.

China manufacturer Double Stage Sliding Vane Rotary Vacuum Pump for Vacuum Coating   vacuum pump brakesChina manufacturer Double Stage Sliding Vane Rotary Vacuum Pump for Vacuum Coating   vacuum pump brakes
editor by CX 2024-03-02


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