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2BV Series Water Ring Vacuum Pump
2BV Series Water Ring Vacuum Pump
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2BE Series Water Ring Vacuum Pump
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High-Speed roots Vacuum Pump Operation
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FORYOU Air-Cooled roots Vacuum Pump
Industrial Screw Vacuum Pump Unit
Industrial Screw Vacuum Pump Unit
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Dry Screw Vacuum Pump 
Dry Screw Vacuum Pump 
Industrial Vacuum Pumping Solutions & Systems
Industrial Vacuum Pumping Solutions & Systems
Screw Vacuum Pump Unit (2).jpg
Screw Vacuum Pump Unit (1).JPG

China Industrial Screw Vacuum Pump Unit - Leading Suppliers & Factory for Enhanced Vacuum Solutions

Introducing our advanced Screw Vacuum Pump Unit, engineered in China to deliver unmatched performance. This unit features a high-efficiency Rotating Vane Pump as the main pump, complemented by an LGB Oil-Free Vane Pump serving as the pre-stage pump. The primary function of the vane pump is to create the essential pre-vacuum required for optimal operation of the Rotating Vane Pump. Serving as a robust booster pump, the Rotating Vane Pump significantly enhances vacuum capacity; every additional stage in series multiplies the ultimate vacuum capability by an order of magnitude. As a leading factory and supplier in the industry, we are committed to providing reliable vacuum solutions tailored to meet your specific needs
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    Product Characteristics

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    Product Parameters

    Product Details

    Standard Series Specifications
    Limiting Pressure: ≤1Pa & ≤0.1Pa
    Extraction Rate: 70 – 2500 L/S
    Total Power: 7 – 48 KW
    Unit Model Limiting Pressure (Pa) Vacuum Extraction Rate (L/S) Main Pump Middle Pump Pre-stage Pump Total Motor Power (KW)

    JZJLG70-1

    ≤1Pa

    70

    ZJP70

    - -

    LGB50

    7

    JZJLG150-2

    150

    ZJP150

    - -

    LGB80

    10.5

    JZJLG150-1

    150

    ZJP150

    - -

    LGB120

    14

    JZJLG300-1

    300

    ZJP300

    - -

    LGB200

    22.5

    JZJLG300-2A

    300

    ZJP300

    - -

    LGB150

    19

    JZJLG300-2B

    300

    ZJP300

    - -

    LGB120

    15

    JZJLG600-2

    600

    ZJP600

    - -

    LGB200

    26

    JZJLG150-2.1

    ≤0.1Pa

    150

    ZJP150

    ZJP70

    LGB50

    10

    JZJLG300-2.1

    300

    ZJP300

    ZJP150

    LGB120

    18

    JZJLG600-2.2

    600

    ZJP600

    ZJP300

    LGB150

    26.5

    JZJLG1200-2.2

    1200

    ZJ1200

    ZJP600

    LGB200

    37

    JZJLG2500-4.2

    2500

    ZJ2500

    ZJP600

    LGB200

    48

    Explanation: The table represents the recommended standard series. Due to the varying working conditions in actual production applications, the intake gas and pressure will undergo many changes. Therefore, during the selection process, calculations should be conducted based on the actual vacuuming process, gas release process, condensation of non-condensable gases, changes in intake pressure over time, etc., or the selection should be made by referring to the usage conditions of existing equipment.

    Frequently Asked Questions
    Q What does the limiting pressure specification (≤1Pa or ≤0.1Pa) mean for these vacuum unit models?
    The limiting pressure indicates the lowest achievable pressure level of the vacuum unit under ideal conditions. Models rated at ≤1Pa are suitable for general high-vacuum applications, while models rated at ≤0.1Pa — which typically include a middle pump stage — are designed for processes requiring deeper vacuum levels, such as precision coating or advanced material processing.
    Q How do I select the right JZJLG vacuum unit model for my application?
    Selection should be based on your actual process requirements, including the required vacuum extraction rate (L/S), target pressure level, gas load characteristics, and how intake pressure changes over time. It is recommended to perform detailed process calculations or consult with an engineer. You may also reference the operating conditions of similar existing equipment as a guide.
    Q Why do some models include a middle pump while others do not?
    Models with a middle pump (e.g., JZJLG150-2.1 and above in the ≤0.1Pa group) are configured as three-stage pumping systems to achieve deeper vacuum levels. The middle pump acts as an intermediate booster between the main pump and the pre-stage pump, enabling the system to reach pressures as low as ≤0.1Pa. Models without a middle pump (shown as "- -") are two-stage systems suitable for ≤1Pa applications.
    Q What is the role of the pre-stage pump (LGB series) in the vacuum unit system?
    The pre-stage pump (LGB series liquid ring or rotary vane pump) serves as the backing pump for the entire system. It maintains the outlet pressure of the main or middle pump within the required operating range, ensuring stable and continuous vacuum performance. The pre-stage pump must be properly matched to the upstream pump stages to avoid pressure imbalance.
    Q Can the standard series models be customized for special working conditions?
    Yes. The table represents recommended standard configurations. Since actual production conditions vary — including differences in gas composition, condensable vapors, and dynamic pressure changes — custom configurations can be designed to match specific process requirements. Users are encouraged to provide detailed process data so that the most suitable pump combination and power rating can be determined.
    Q What is the significance of the total motor power (KW) when choosing a vacuum unit?
    The total motor power reflects the combined electrical power consumption of all pumps in the unit (main, middle, and pre-stage). It is an important factor for facility planning, electrical infrastructure sizing, and operating cost estimation. Higher extraction rate models naturally require more power — ranging from 7 KW for the JZJLG70-1 up to 48 KW for the JZJLG2500-4.2. Balancing performance requirements against energy costs is key to an optimal selection.

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