Request a Quote
English
English Chinese Simplified French German Portuguese Spanish Russian Japanese Korean Arabic Turkish Italian Indonesian Polish Hindi Dutch Malay Persian Thai Vietnamese
Leave Your Message
Products Categories
Featured Products
2BV Series Water Ring Vacuum Pump
2BV Series Water Ring Vacuum Pump
2BE Series Water Ring Vacuum Pump
2BE Series Water Ring Vacuum Pump
2BW Water Ring Vacuum Pump Closed-Loop Unit
2BW Water Ring Vacuum Pump Closed-Loop Unit
FORYOU Air-Cooled Self-Circulating Water-Ring Vacuum Pump Unit
FORYOU Air-Cooled Self-Circulating Water-Ring Vacuum Pump Unit
High-Speed roots Vacuum Pump Operation
High-Speed roots Vacuum Pump Operation
FORYOU Air-Cooled roots Vacuum Pump
FORYOU Air-Cooled roots Vacuum Pump
Industrial Screw Vacuum Pump Unit
Industrial Screw Vacuum Pump Unit
Roots water ring vacuum unit
Roots water ring vacuum unit
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 and Factory for High-Performance Pump Solutions

The Screw vacuum pump unit is engineered to deliver superior vacuum performance, featuring a Rotating vane pump as the primary pump and an LGB oil-free vane pump serving as the pre-stage pump. This innovative design ensures that the vane pump supplies the essential pre-vacuum required for the Rotating vane pump, which acts as a booster pump. By adding additional stages of the Rotating vane pump in series, the ultimate vacuum capacity of this unit can be increased by an order of magnitude. As a leading factory and supplier in China, we are committed to providing high-quality vacuum solutions tailored to meet diverse industrial needs
    Get Quote

    Product Characteristics

    01

    This is a paragraph

    This is a paragraph

    02

    This is a paragraph

    This is a paragraph

    03

    This is a paragraph

    This is a paragraph

    04

    This is a paragraph

    This is a paragraph

    05

    This is a paragraph

    This is a paragraph

    06

    This is a paragraph

    This is a paragraph

    07

    This is a paragraph

    This is a paragraph

    08

    This is a paragraph

    This is a paragraph

    09

    This is a paragraph

    This is a paragraph

    10

    This is a paragraph

    This is a paragraph

    11

    This is a paragraph

    This is a paragraph

    12

    This is a paragraph

    This is a paragraph

    13

    This is a paragraph

    This is a paragraph

    14

    This is a paragraph

    This is a paragraph

    Product Parameters

    Product Details

    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 of ≤1Pa and ≤0.1Pa mean in the JZJLG series vacuum unit table?
    A
    The limiting pressure indicates the lowest pressure (ultimate vacuum) the unit can achieve under ideal conditions. Models listed at ≤1Pa are suitable for general high-vacuum applications, while those rated at ≤0.1Pa are designed for processes requiring deeper vacuum levels, typically utilizing a three-stage pump configuration with an additional middle pump.
    Q
    How do I select the correct JZJLG vacuum unit model for my application?
    A
    Selection should be based on your actual working conditions, including the required vacuum extraction rate (L/S), the target limiting pressure, the nature of the intake gas, and how intake pressure changes over time during the process. It is recommended to perform detailed calculations based on your vacuuming and gas release processes, or consult with our engineers by referencing the usage conditions of similar existing equipment.
    Q
    What is the role of the main pump, middle pump, and pre-stage pump in the vacuum unit system?
    A
    The main pump (e.g., ZJP or ZJ series Roots pump) provides the primary high-speed gas displacement. The middle pump serves as an intermediate booster stage to bridge the pressure range between the main and pre-stage pumps, and is only used in deeper vacuum configurations (≤0.1Pa). The pre-stage pump (LGB series liquid ring or rotary vane pump) backs the system by maintaining a sufficiently low discharge pressure for the upstream pumps to operate efficiently.
    Q
    Why do some models with the same vacuum extraction rate have different total motor power values?
    A
    The total motor power depends on the combination of pumps used in the unit. Even when the main pump and extraction rate are identical, a different pre-stage pump model (e.g., LGB120 vs. LGB150 vs. LGB200) will result in different power consumption. Larger pre-stage pumps handle higher gas loads but require more power. For example, JZJLG300-2A uses LGB150 at 19 KW, while JZJLG300-1 uses LGB200 at 22.5 KW.
    Q
    Can the standard series models in the table be customized for special working conditions?
    A
    Yes. The table represents the recommended standard series configurations. Since actual production environments vary significantly in terms of gas composition, condensable vapor content, and pressure fluctuation profiles, custom configurations can be engineered. Customers are encouraged to provide detailed process parameters so that an optimized pump combination can be designed to match specific operational requirements.
    Q
    What factors should be considered regarding condensation of non-condensable gases during vacuum unit selection?
    A
    During the vacuuming process, gases such as water vapor or organic solvents may condense within the pump system if not properly managed. This can affect pump performance, cause corrosion, or contaminate the pump oil. When selecting a unit, it is important to account for the condensation characteristics of all gases present, consider adding gas ballast, condensers, or cold traps where necessary, and ensure the pre-stage pump is compatible with the condensable gas load expected in your process.

    Leave Your Message