China OEM No Oil Dry Screw Vacuum Pump in Solvent Recovery Field wholesaler

Product Description


Product Description

Dry screw vacuum pump, is the use of a pair of screw, made in the pump shell synchronous high-speed reverse rotation of the effects of the suction and exhaust and suction device, 2 screw fine dynamic balancing correction, and is supported by bearings, is installed in the pump shell, between screw and screw has a certain gap, so the pump work, no friction between each other, smooth running, low noise, Working chamber without lubricating oil, therefore, dry screw pump can remove a lot of steam and a small amount of dust gas occasions, higher limit vacuum, lower power consumption, energy saving, maintenance-free and other advantages.

Our Advantages

There is no medium in the working chamber, which can obtain a clean vacuum.
. No clearance between rotating parts, high speed operation, small overall volume.

There is no compression in the gas, suitable for extraction of coagulable gas.

Can remove a lot of steam and a small amount of dust gas occasions.
. High vacuum, the ultimate vacuum up to 1 Pa.

Screw material is high strength special material, material density, wear resistance, stable performance.

No friction rotating parts, low noise.
. Simple structure, convenient maintenance.
Wider range of use: corrosive environment can be used.

No oil consumption, no water.

Pump gas directly discharged from the pump body, no pollution of water, no environmental pressure, more convenient gas recovery.

It can be composed of oil-free unit with Roots pump and molecular pump.


Typical Use

——Oil and gas recovery.    ——Biological medicine ——Food Processing —— Single crystal furnace
——Vacuum forming ——Vacuum flame refining ——Electronic photovoltaic. ——Semiconductor synthesis

Product Parameters

(Air cooled series)
                                                                            Basic parameters 
Pumping speed
Presure limit(Pa)  Power (kW)  revolution (rpm) Inlet caliber
outlet caliber (mm) Pump head weight
noise dB(A) Overall dimension
LG-10 10 ≤5 0.75 2730 KF16 KF16 30 ≤ 72 655x260x285
LG-20 20 ≤5 1.1 2840 KF25 KF25 55 ≤72 720x305x370
LG-50 50 ≤10 2.2 2850 KF40 KF40 90 ≤75 920x350x420
LG-70 70 ≤30 3 2850 KF40 KF40 110 ≤75 910x390x460
LG-90 90 ≤30 4 2870 KF50 KF50 125 ≤80 1000x410x495

Characteristic Curve


Detailed Photos

General Manager Speech

Deeply cultivate the vacuum technology, and research,develop and manufacture the vacuum equipment to provide the best solution in the vacuum field and make the vacuum application easier.

Company Profile

ZheJiang Kaien Vacuum Technology Co., Ltd. is a high-tech enterprise integrating R & D, production and operation of vacuum equipment. The company has strong technical force, excellent equipment and considerate after-sales service. The product manufacturing process is managed in strict accordance with IS09001 quality system. It mainly produces and sells screw vacuum pump, roots pump, claw vacuum pump, runoff vacuum pump, scroll pump, water ring vacuum pump, vacuum unit and other vacuum systems.

New plant plHangZhou

The company’s products have been for a number of food, medicine, refrigeration, drying plants and a number of transformer related equipment manufacturers for vacuum equipment. The products are widely used in vacuum drying and dehydration, kerosene vapor phase drying, vacuum impregnation, vacuum metallurgy, vacuum coating, vacuum evaporation, vacuum concentration, oil and gas recovery, etc.

High precision machining equipment

The company cooperates with many scientific research institutions and universities, such as ZheJiang University, China University of petroleum, ZheJiang Institute of mechanical design, etc.with colleges and universities to research and develop core technologies, and owns dozens of independent intellectual property patents.Our technology is leading, the product quality is stable, the product has a good reputation in China’s domestic market, is sold all over the country, and is exported to Europe, America, Africa, the Middle East and Southeast Asia,We adhering to the basic tenet of quality, reputation and service, the company takes leading-edge technology of vacuum pump as its own responsibility, and wholeheartedly serves customers of vacuum equipment application in various industries with rigorous working attitude and professional working style.

Product quality wins consumer cooperationIn shipmentISO 9001


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After-sales Service: Lifetime Paid Service
Warranty: One Year
Oil or Not: Oil Free
Structure: Screw
Exhauster Method: Entrapment Vacuum Pump
Vacuum Degree: High Vacuum


screw vane pump

What is the typical lifespan of a screw vacuum pump?

The typical lifespan of a screw vacuum pump can vary depending on various factors, including the quality of the pump, maintenance practices, operating conditions, and usage patterns. Here’s a detailed explanation of the factors that can influence the lifespan of a screw vacuum pump:

1. Quality and Design:

The quality and design of the screw vacuum pump play a significant role in its lifespan. High-quality pumps manufactured by reputable companies tend to have longer lifespans compared to lower-quality or poorly designed pumps. Pumps with robust construction, durable materials, and reliable components are more likely to withstand the rigors of operation and have an extended service life.

2. Maintenance Practices:

Proper maintenance is crucial for maximizing the lifespan of a screw vacuum pump. Regular maintenance activities, such as lubrication, inspection, and cleaning, help ensure the pump operates optimally and minimizes wear and tear. Following the manufacturer’s recommended maintenance schedule, using the correct lubricants, and addressing any issues promptly can significantly extend the pump’s lifespan.

3. Operating Conditions:

The operating conditions in which the screw vacuum pump is used can impact its lifespan. Factors such as temperature, pressure, humidity, and the presence of corrosive or abrasive substances can affect the pump’s performance and longevity. Pumps designed for specific operating conditions or equipped with protective measures, such as coatings or corrosion-resistant materials, may have an extended lifespan in challenging environments.

4. Usage Patterns:

The usage patterns of the screw vacuum pump also influence its lifespan. Factors such as duty cycle, operating hours, and load variations can impact the wear and tear on the pump’s components. Pumps subjected to continuous or heavy-duty usage may experience more significant wear and have a shorter lifespan compared to pumps used intermittently or under lighter loads.

5. Maintenance and Repair History:

The maintenance and repair history of the screw vacuum pump can provide insights into its lifespan. Pumps that have been well-maintained, with regular servicing, timely repairs, and component replacements as needed, are more likely to have longer lifespans. Conversely, pumps that have a history of neglected maintenance or frequent breakdowns may have reduced lifespans.

6. Technological Advancements:

The ongoing advancements in screw vacuum pump technology can also impact the lifespan of pumps. Newer generations of pumps may incorporate improved designs, materials, and components that enhance reliability and durability. Pumps featuring advanced monitoring and diagnostic capabilities can help detect and address potential issues before they escalate, thus prolonging the pump’s lifespan.

It is important to note that the typical lifespan of a screw vacuum pump can range from several years to several decades, depending on the aforementioned factors. While some pumps may require replacement after a decade or so of service, well-maintained pumps operating in favorable conditions can exceed 20 years of reliable operation.

Ultimately, to determine the specific lifespan of a screw vacuum pump, it is advisable to consult the manufacturer’s guidelines, consider the operating conditions, and implement a proactive maintenance program to ensure optimal performance and longevity.

screw vane pump

Can screw vacuum pumps be used in pharmaceutical and chemical industries?

Yes, screw vacuum pumps can be used in both the pharmaceutical and chemical industries. Here’s a detailed explanation of their applications and benefits in these industries:

Pharmaceutical Industry:

In the pharmaceutical industry, screw vacuum pumps play a crucial role in various processes, including:

1. Drying and Dehydration: Screw vacuum pumps are used for drying pharmaceutical products, such as tablets, powders, and granules. They create a vacuum environment that facilitates the removal of moisture, ensuring product stability and extending shelf life.

2. Distillation and Evaporation: Screw vacuum pumps are employed in distillation and evaporation processes to remove solvents, concentrate solutions, or separate components. They enable precise control over temperature and pressure conditions, ensuring efficient and high-quality separation of pharmaceutical compounds.

3. Filtration and Sterilization: Screw vacuum pumps are utilized in filtration systems to create suction for the filtration of pharmaceutical liquids and solutions. They are also employed in sterilization processes, such as autoclaves, where they help create the necessary vacuum conditions for steam sterilization.

4. Freeze Drying: Screw vacuum pumps are commonly used in freeze drying, also known as lyophilization, which is a widely used method for preserving sensitive pharmaceutical products. They facilitate the removal of water from frozen products under vacuum, preserving their structure, stability, and efficacy.

Chemical Industry:

In the chemical industry, screw vacuum pumps find applications in various processes, including:

1. Vacuum Distillation: Screw vacuum pumps are employed in vacuum distillation processes to separate and purify chemical compounds based on their boiling points. They create a vacuum environment that lowers the boiling points of the substances, enabling more efficient separation and reducing the energy required for the process.

2. Solvent Recovery: Screw vacuum pumps are used for solvent recovery in chemical production. They help remove solvents from mixtures, allowing for their reuse and reducing waste and environmental impact.

3. Vacuum Filtration: Screw vacuum pumps are utilized in vacuum filtration systems to facilitate the separation of solids from liquids or gases. They create suction that aids in the filtration process, improving efficiency and throughput.

4. Reactor Applications: Screw vacuum pumps are employed in various reactor applications, including creating vacuum conditions for chemical reactions that require low pressure or removing byproducts or unreacted gases from the reaction vessel.


There are several benefits of using screw vacuum pumps in the pharmaceutical and chemical industries:

1. Efficiency: Screw vacuum pumps offer high pumping speeds, allowing for rapid evacuation and faster processing times in pharmaceutical and chemical processes.

2. Control: Screw vacuum pumps can be easily integrated into automated systems, allowing for precise control and adjustment of vacuum levels, temperature, and other process parameters.

3. Versatility: Screw vacuum pumps can handle a wide range of chemical compounds and pharmaceutical products, making them suitable for diverse applications in these industries.

4. Reliability: Screw vacuum pumps are known for their robust construction and reliable performance, ensuring continuous operation and minimizing downtime.

5. Oil-Free Operation: Many screw vacuum pumps are designed for oil-free operation, which is essential in pharmaceutical and chemical applications where contamination from lubricating oil must be avoided.

6. Compliance: Screw vacuum pumps can meet the stringent requirements and standards of the pharmaceutical and chemical industries, including Good Manufacturing Practice (GMP) guidelines and safety regulations.

In summary, screw vacuum pumps are well-suited for applications in the pharmaceutical and chemical industries. Their efficiency, control capabilities, versatility, reliability, oil-free operation, and compliance with industry standards make them valuable assets in various processes, ranging from drying and distillation to filtration and sterilization.

screw vane pump

What is a screw vacuum pump, and how does it operate?

A screw vacuum pump is a type of positive displacement vacuum pump that utilizes two or more intermeshing screws to create a vacuum by trapping and transporting gas or vapor from the inlet to the outlet of the pump. It operates based on the principle of volumetric compression.

The basic components of a screw vacuum pump include rotors (screws), a housing, and inlet and outlet ports. The rotors are typically helical in shape and have precise screw profiles. They are mounted on parallel shafts within the pump housing. As the rotors rotate, the intermeshing screws create sealed cavities or “pockets” between the rotor lobes and the housing.

The operation of a screw vacuum pump typically involves the following steps:

  1. Inlet Stage: At the beginning of the pump cycle, the rotors start rotating. As the cavity between the rotor lobes and the housing passes the inlet port, gas or vapor is drawn into the cavity. The volume of the cavity expands, creating a low-pressure zone at the inlet.
  2. Compression Stage: As the rotors continue to rotate, the cavity moves towards the outlet port, gradually reducing its volume. This reduction in volume compresses the gas or vapor trapped within the cavity, causing its pressure to increase.
  3. Outlet Stage: Finally, when the cavity reaches the outlet port, the compressed gas or vapor is discharged from the pump, and the cycle repeats.

It is important to note that screw vacuum pumps can operate with either dry or liquid seals. Dry screw vacuum pumps rely on tight clearances between the rotors and the housing to create an effective seal, while liquid-sealed screw vacuum pumps use a liquid sealant to prevent gas leakage and provide lubrication between the rotor surfaces.

Screw vacuum pumps offer several advantages in various applications:

  • High Efficiency: Screw vacuum pumps can achieve high volumetric efficiency due to their positive displacement design, enabling them to handle large volumes of gas or vapor efficiently.
  • Continuous Operation: These pumps are capable of continuous operation, making them suitable for demanding industrial processes requiring sustained vacuum levels.
  • Reliability: Screw vacuum pumps are known for their reliability and robust construction, making them suitable for harsh operating conditions.
  • Low Noise Levels: Compared to other types of vacuum pumps, screw vacuum pumps often produce lower noise levels during operation.
  • Wide Range of Applications: Screw vacuum pumps find applications in various industries, including chemical processing, pharmaceuticals, food and beverage, wastewater treatment, and more.

In summary, a screw vacuum pump is a positive displacement pump that utilizes intermeshing screws to create a vacuum by trapping and compressing gas or vapor. Its operation involves drawing gas into the cavity, compressing it, and then discharging it. Screw vacuum pumps offer high efficiency, reliability, and suitability for a wide range of applications, making them a popular choice in many industries.

China OEM No Oil Dry Screw Vacuum Pump in Solvent Recovery Field   wholesaler China OEM No Oil Dry Screw Vacuum Pump in Solvent Recovery Field   wholesaler
editor by Dream 2024-05-17