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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
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Screw Water Ring Vacuum Pump Unit (1).JPG
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China Suppliers Factory Screw Water Ring Vacuum Pump Unit for Enhanced Vacuum Performance

The Screw Water Ring Vacuum Pump Unit is an advanced vacuum solution that combines a high-performance Screw pump as the primary pump with 2BV or 2BE water ring pumps as pre-stage pumps. This innovative design allows the water ring pump to effectively create the necessary pre-vacuum for the Screw pump, enhancing overall efficiency. The Screw pump serves as a booster, significantly increasing the ultimate vacuum degree of the entire unit. For every additional stage of Screw pumps connected, the vacuum unit can achieve one order of magnitude of improved vacuum levels. As a leading manufacturer in China, our factory is committed to providing high-quality vacuum pump solutions to satisfy the diverse needs of our customers. Connect with the trusted suppliers in the industry for reliable and efficient vacuum technology
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    Product Characteristics

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    Product Parameters

    Product Details

    Unit model

    Pump model

    Draw rate

    L/S

    Absolute vacuum

    Pa

    Total power

    KW

    Main pump

    Pre-stage pump

    JZJ2B30-1

    ZJP30

    2BV5110

    30

    267

    5.5

    JZJ2B70-1

    ZJP70

    2BV5111

    70

    7

    JZJ2B150-1

    ZJP150

    2BV5131

    150

    14

    JZJ2B300-2

    ZJP300

    2BV5161

    300

    19

    JZJ2B300-1

    ZJP300

    2BE1 202

    300

    26

    JZJ2B600-2

    ZJP600

    2BE1 203

    600

    44.5

    JZJ2B600-1

    ZJP600

    2BE1 252

    600

    52.5

    JZJ2B70-2.1

    ZJP70

    ZJP30/2BV5110

    70

    25

    7

    JZJ2B150-2.1

    ZJP150

    ZJP70/2BV5111

    150

    10

    JZJ2B300-2.1

    ZJP300

    ZJP150/2BV5131

    300

    18

    JZJ2B600-2.2

    ZJP600

    ZPJ300/2BV5161

    600

    26.5

    JZJ2B1200-2.2

    ZJ1200

    ZJP600/2BE1203

    1200

    55.5

    JZJ2B1200-2.1

    ZJ1200

    ZJP600/2BE1252

    1200

    63.5

    JZJ2B2500-2.1

    ZJ2500

    ZJ1200/2BE1303

    2500

    133

    JZJ2B5000-4.1

    ZJ5000

    ZJ1200/2BE1303

    5000

    176

    JZJ2B70-2.1.1

    ZJP70

    ZJP30/ZJP30/2BV5110

    70

    0.5

    8.5

    JZJ2B150-2.2.1

    ZJP150

    ZJP70/ZJP30/2BV5110

    150

    10

    JZJ2B300-2.2.1

    ZJP300

    ZJP150/ZJP70/2BV5111

    300

    14

    JZJ2B600-2.2.1

    ZJP600

    ZJP300/ZJP150/2BV5131

    600

    23.5

    JZJ2B1200-2.2.2

    ZJ1200

    ZJP600/ZJP300/2BV5161

    1200

    37.5

    JZJ2B1200-2.2.1

    ZJ1200

    ZJP600/ZJP300/2BE1202

    1200

    51.5

    JZJ2B2500-2.2.1

    ZJ2500

    ZJ1200/ZJP600/2BE1252

    2500

    85.5

    JZJ2B2500-4.2.1

    ZJ2500

    ZJP600/ZJP300/2BE1202

    2500

    55.5

    JZJ2B5000-4.2.1

    ZJ5000

    ZJ1200/ZJP600/2BE1252

    5000

    118.5
    ⓘ Important Notes
    • 1 The series in the table represents the recommended standards. Due to the varying working conditions in actual production applications, the gas intake and pressure will undergo many changes. Therefore, during the selection process, calculations or reference to the usage of existing equipment should be conducted based on the actual vacuum extraction process, gas release process, condensation of non-volatile gases, time variations of the intake pressure, etc.
    • 2 The technical indicators of the single pump are detailed in the respective pump parameter tables.
    • 3 The maximum intake pressure refers to the highest pressure that the main pump can start at. If it operates for a long time at a pressure higher than this, it will cause the main pump to overload.
    • 4 If the vacuum pump motor, electrical contact vacuum gauge/pressure transmitter, and electrical control cabinet need to be explosion-proof, please specify during the order. The 2BV5 water ring vacuum pump in the table should be correspondingly changed to the 2BV6 series.
    ❓ Frequently Asked Questions
    Q What does the unit model designation (e.g., JZJ2B300-2) indicate in the JZJ2B series vacuum pump units?
    A The unit model designation encodes key configuration information. "JZJ2B" identifies the product series (Roots + water ring vacuum unit), the number following indicates the draw rate (e.g., 300 L/S), and the suffix (e.g., -2 or -2.1) denotes the pump combination stage configuration, including how many pre-stage pumps are used and their arrangement.
    Q How should I select the correct JZJ2B vacuum unit model for my application?
    A Selection should be based on your actual process requirements, including the required vacuum extraction rate (L/S), the absolute vacuum level needed (Pa), gas release characteristics, condensation behavior of non-volatile gases, and time variations in intake pressure. It is recommended to perform detailed calculations or reference existing equipment with similar working conditions rather than relying solely on the table's standard configurations.
    Q What is the risk of operating the main pump above its maximum intake pressure for extended periods?
    A Operating the main pump continuously at pressures exceeding its maximum intake pressure will cause the pump motor to overload. This can lead to overheating, accelerated wear, potential motor burnout, and reduced service life of the unit. Always ensure the system operates within the specified pressure range during sustained operation.
    Q When is an explosion-proof configuration required, and what changes does it involve?
    A An explosion-proof configuration is required when the vacuum pump unit will be operated in environments with flammable gases, vapors, or dust — such as chemical plants, refineries, or solvent processing facilities. In this case, the vacuum pump motor, electrical contact vacuum gauge or pressure transmitter, and electrical control cabinet must all meet explosion-proof standards. Additionally, the 2BV5 series water ring vacuum pump listed in the table must be replaced with the corresponding 2BV6 explosion-proof series. This must be specified at the time of ordering.
    Q What is the difference between single-stage and multi-stage pre-pump configurations in this series?
    A Single-stage pre-pump configurations (e.g., -1 suffix) use one pre-stage pump directly backing the main Roots pump, achieving absolute vacuums around 267 Pa. Multi-stage configurations (e.g., -2.1, -2.2.1) use two or three cascaded pre-stage pumps, allowing the system to reach significantly deeper vacuum levels — down to 25 Pa or even 0.5 Pa — making them suitable for processes requiring ultra-high vacuum performance.
    Q Where can I find detailed technical parameters for individual pumps (ZJP, ZJ, 2BV, 2BE series) used in these units?
    A Detailed technical specifications — including individual pump performance curves, motor ratings, dimensional drawings, and operating limits — for each pump model (such as ZJP30, ZJP150, 2BV5110, 2BE1 202, etc.) are provided in their respective pump parameter tables. Please refer to the individual product datasheets or contact the manufacturer for complete technical documentation.

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