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China Best Sales Liquid Ring Vacuum Pump for Plastic Extrusion Lines vacuum pump ac system

Product Description

Product Description

SK-A series vacuum pumps are based on SK vacuum pump ,which designed according to plastic machine industry special needs.This kind of pump have solved the problems that when absorbing lots of water,can not work continuously;when scaling seriously for hard water,can not start beause of stopping working for a long time.And widely used on tubing machine and molding machine.Items:SK-0.15A SK-0.3A,SK-0.5A SK-0.8A,SK-1.2A ,SK-2A ,SK-3A.Motor power from 0.55~5.5KW ;Capacity:0.15~3M3/min,Ultimate vacuum:-0.095MPa.

Pump specifications








 Limit vacuum











(-Mpa)  Torr
SK-0.15A     0.55       0.15 0.095  47   G3/4″ 2825     23.5 381x170x217
SK-0.3A     1.1       0.3 0.095  47  G1″  2840      33 460x180x235
SK-0.5A     1.5       0.5 0.095  47  G1″  2840      34 485x180x235
SK-0.8A     2.2       0.8 0.095  47  G1″  2840


SK-1.2A     3.0       1.2 0.095  47    G1 1/2″    2860     51.5 528x218x260
SK-2A     4.0       2.0 0.095  47   G1 1/2″  2880      63 560x220x286
SK-2C     4.0       2.0 0.098  25   G1 1/2″  2850      63 560x220x286
SK-2D     5.5       2.0 0.095  47   50mm 1440     113 668x340x359
SK-3A     5.5       3.0 0.095  47  G2″ 1440     105 645x310x338
SK-3C     5.5       3.5 0.098  25   G2″ 1440     107 665x310x338
SK-3D     5.5       3.0 0.095  47  50mm 1440     118 688x340x371
SK-3E     5.5       3.5 0.098  25  50mm 1440     120 706x340x371
SK-4.5D     7.5       4.5 0.095  47  66mm 1440     150 800x380x388
SK-4.5E     7.5       4.5 0.098  25  66mm 1440     150 800x380x388
SK-6D     11       6.0 0.095  47  66mm 1460     198 854x380x425
SK-6E     11       6.5 0.098  25  66mm 1460     198 854x380x425

Product’s Application
It is widely used in all kinds of plastic extrusion line;medical and pharmaceutical industry(autoclave,sterilizer,capsule filling machine);EPS foam machine;food-related industry;chemical industry;vacuum filtration;vacuum water diversion;vacuum feeding;vacuum evaporation;vacuum concentration;vacuum reflow;vacuum degassing,etc 

 Packaging & Shipping:


  1. Standard export polywooden cases.

  2. Customized packaging can be available.


Shipping method Note
Express Door to door, very convenient, don’t need customs clearance or pick-up.
By air Airport to airport, you need to do the customs clearance and pick up the goods at your local airport.
By sea Port to port and you need to do the customs clearance and pick-up the goods at your local port.


Company Overview
Established in 1986, our company has been focusing on the development and manufacture of vacuum pumps and water pumps.We are a comprehensive pump company integrating production, sales and after-sales maintenance services.

The main products include liquid ring vacuum pumps;rotary vane vacuum pumps;roots vacuum pump;centrifugal water pump and customized vacuum pump system,which are widely used in all kinds of plastic extrusion line;medical and pharmaceutical industry(autoclave sterilizer/capsule filling and sealing machine);food-related industry(beverage machine/milking machine/sugar plant);chemical industry;power plant;coal mine etc.

Our Advantages

1,Direct connected ,simple structure,small volume

2,Impeller material:alloy  copper whole casting (made by ourselves)

3,Pump chamer coating treatment,anti-scalling 

4,Adopt custom anti-corrosion mechanical seal 

5,All motors are certified by CE and manufactured  by self to ensure their quality 

6,We have a complete set of microcomputer controlled testing system (All products are subject to inspection.)

Our Services

Pre-Sales Service

  1. Provide 24-hour reply.

  2. Provide suitable models according to clients’ requirements.

  3. Provide detailed product specifications and reasonal prices. 

In-Sales Service

  1. Supervise whole production time. 

  2. Provide product’s testing performance curve to customers.

  3. Provide inspection pictures to customers after we finish production.

After-Sales Service

  1. Provide installation manual.

  2. Under correct installation, normal maintenance and using,we guarantee one-year warranty.

  3. If product has malfunction,we’ll reply you within 24 hour and provide solution or even send technical staff to spot after receiving maintenance notification.


1.  Q: Are you a manufacturer or trading company?

    A: We are manufacturer of vacuum pumps and water pumps in China since 1986.

2.  Q: What’s your MOQ?

    A: One set is ok.

3.  Q: What’s your payments terms?

    A: T/T, Western Union……

4.  Q: What certificates do you have?

    A: CE, ISO 9001 ….

5.  Q: How about the warranty?

    A: 12 months warranty since delivery.

6.  Q: What’s the delivery time?

    A: For different models,different motor specs and different material,delivery time is different,please double confirm with our sales team.

7.  Q: Can you do OEM brand?

    A: Yes, welcome.

8.  Q: Quality reliable?

    A: We have whole testing system controlled by micro-machine,testing performance curve can be sent to clients before arrange delivery.


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Oil or Not: Oil Free
Structure: Reciprocating Vacuum Pump
Exhauster Method: Positive Displacement Pump
Vacuum Degree: Low Vacuum
Work Function: Mainsuction Pump
Working Conditions: Wet


vacuum pump

Can Vacuum Pumps Be Used for Vacuum Furnaces?

Yes, vacuum pumps can be used for vacuum furnaces. Here’s a detailed explanation:

Vacuum furnaces are specialized heating systems used in various industries for heat treatment processes that require controlled environments with low or no atmospheric pressure. Vacuum pumps play a crucial role in creating and maintaining the vacuum conditions necessary for the operation of vacuum furnaces.

Here are some key points regarding the use of vacuum pumps in vacuum furnaces:

1. Vacuum Creation: Vacuum pumps are used to evacuate the furnace chamber, creating a low-pressure or near-vacuum environment. This is essential for the heat treatment processes carried out in the furnace, as it helps eliminate oxygen and other reactive gases, preventing oxidation or unwanted chemical reactions with the heated materials.

2. Pressure Control: Vacuum pumps provide the means to control and maintain the desired pressure levels within the furnace chamber during the heat treatment process. Precise pressure control is necessary to achieve the desired metallurgical and material property changes during processes such as annealing, brazing, sintering, and hardening.

3. Contamination Prevention: By removing gases and impurities from the furnace chamber, vacuum pumps help prevent contamination of the heated materials. This is particularly important in applications where cleanliness and purity of the processed materials are critical, such as in the aerospace, automotive, and medical industries.

4. Rapid Cooling: Some vacuum furnace systems incorporate rapid cooling capabilities, known as quenching. Vacuum pumps assist in facilitating the rapid cooling process by removing the heat generated during quenching, ensuring efficient cooling and minimizing distortion or other unwanted effects on the treated materials.

5. Process Flexibility: Vacuum pumps provide flexibility in the type of heat treatment processes that can be performed in vacuum furnaces. Different heat treatment techniques, such as vacuum annealing, vacuum brazing, or vacuum carburizing, require specific pressure levels and atmospheric conditions that can be achieved and maintained with the use of vacuum pumps.

6. Vacuum Pump Types: Different types of vacuum pumps can be used in vacuum furnaces, depending on the specific requirements of the heat treatment process. Commonly used vacuum pump technologies include oil-sealed rotary vane pumps, dry screw pumps, diffusion pumps, and cryogenic pumps. The choice of vacuum pump depends on factors such as required vacuum level, pumping speed, reliability, and compatibility with the process gases.

7. Maintenance and Monitoring: Proper maintenance and monitoring of vacuum pumps are essential to ensure their optimal performance and reliability. Regular inspections, lubrication, and replacement of consumables (such as oil or filters) are necessary to maintain the efficiency and longevity of the vacuum pump system.

8. Safety Considerations: Operating vacuum furnaces with vacuum pumps requires adherence to safety protocols. This includes proper handling of potentially hazardous gases or chemicals used in the heat treatment processes, as well as following safety guidelines for operating and maintaining the vacuum pump system.

Overall, vacuum pumps are integral components of vacuum furnaces, enabling the creation and maintenance of the required vacuum conditions for precise and controlled heat treatment processes. They contribute to the quality, consistency, and efficiency of the heat treatment operations performed in vacuum furnaces across a wide range of industries.

vacuum pump

How Do Vacuum Pumps Assist in Freeze-Drying Processes?

Freeze-drying, also known as lyophilization, is a dehydration technique used in various industries, including pharmaceutical manufacturing. Vacuum pumps play a crucial role in facilitating freeze-drying processes. Here’s a detailed explanation:

During freeze-drying, vacuum pumps assist in the removal of water or solvents from pharmaceutical products while preserving their structure and integrity. The freeze-drying process involves three main stages: freezing, primary drying (sublimation), and secondary drying (desorption).

1. Freezing: In the first stage, the pharmaceutical product is frozen to a solid state. Freezing is typically achieved by lowering the temperature of the product below its freezing point. The frozen product is then placed in a vacuum chamber.

2. Primary Drying (Sublimation): Once the product is frozen, the vacuum pump creates a low-pressure environment within the chamber. By reducing the pressure, the boiling point of water or solvents present in the frozen product is lowered, allowing them to transition directly from the solid phase to the vapor phase through a process called sublimation. Sublimation bypasses the liquid phase, preventing potential damage to the product’s structure.

The vacuum pump maintains a low-pressure environment by continuously removing the water vapor or solvent vapor generated during sublimation. The vapor is drawn out of the chamber, leaving behind the freeze-dried product. This process preserves the product’s original form, texture, and biological activity.

3. Secondary Drying (Desorption): After the majority of the water or solvents have been removed through sublimation, the freeze-dried product may still contain residual moisture or solvents. In the secondary drying stage, the vacuum pump continues to apply vacuum to the chamber, but at a higher temperature. The purpose of this stage is to remove the remaining moisture or solvents through evaporation.

The vacuum pump maintains the low-pressure environment, allowing the residual moisture or solvents to evaporate at a lower temperature than under atmospheric pressure. This prevents potential thermal degradation of the product. Secondary drying further enhances the stability and shelf life of the freeze-dried pharmaceutical product.

By creating and maintaining a low-pressure environment, vacuum pumps enable efficient and controlled sublimation and desorption during the freeze-drying process. They facilitate the removal of water or solvents while minimizing the potential damage to the product’s structure and preserving its quality. Vacuum pumps also contribute to the overall speed and efficiency of the freeze-drying process by continuously removing the vapor generated during sublimation and evaporation. The precise control provided by vacuum pumps ensures the production of stable and high-quality freeze-dried pharmaceutical products.

vacuum pump

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.

China Best Sales Liquid Ring Vacuum Pump for Plastic Extrusion Lines   vacuum pump ac system	China Best Sales Liquid Ring Vacuum Pump for Plastic Extrusion Lines   vacuum pump ac system
editor by CX 2023-12-26


Professional production Roots Vacuum Pumps, rotary vane pump, rotary piston pump, liquid ring vacuum pump, Oil-free Air Compressor, Screw Compressor, Scroll Compressor Manufacturer and Supplier.