China Industrial Screw Vacuum Pump Unit - Leading Suppliers and Manufacturer Factory Solutions
01
High vacuum
Ultimate vacuum ≤ 1Pa
02
High pumping speed
Pumping capacity 70L/S - 20000L/S
03
Independently manufactured
Independently manufactured, with over 40 vacuum-related patents, rated as a national high-tech enterprise and a science and technology enterprise
04
Oil-free and water-free dry operation
Oil-free and water-free dry operation, environmentally friendly and emission reduction, 100% solvent recovery
Product Parameters
📈 Product Specifications
| 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 |
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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.
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Frequently Asked Questions (FAQ)
Q
What does the "Limiting Pressure" indicate in the JZJLG vacuum unit specifications?
A
The limiting pressure refers to the lowest achievable pressure (in Pascals) that the vacuum unit can reach under ideal operating conditions. Models in this series achieve either ≤1Pa or ≤0.1Pa, with the lower value indicating a higher degree of vacuum suitable for more demanding industrial applications.
Q
What is the difference between the ≤1Pa and ≤0.1Pa series models?
A
The ≤1Pa series models (e.g., JZJLG70-1 to JZJLG600-2) use only a main pump and a pre-stage pump, with no middle pump. The ≤0.1Pa series (e.g., JZJLG150-2.1 to JZJLG2500-4.2) incorporate an additional middle pump (such as ZJP70, ZJP150, ZJP300, or ZJP600) to achieve a deeper vacuum level, making them suitable for more precision-demanding processes.
Q
How should I select the right JZJLG vacuum unit model for my application?
A
Model selection should be based on your actual vacuuming process requirements, including the required vacuum level (limiting pressure), the volume of gas to be evacuated (extraction rate in L/S), gas release characteristics, condensation behavior of non-condensable gases, and how intake pressure changes over time. Referencing existing equipment with similar working conditions is also a reliable approach.
Q
What do the ZJP and LGB designations represent in the pump columns?
A
ZJP designates Roots vacuum pumps used as the main pump or middle pump in the unit system, with the number indicating the pumping speed (e.g., ZJP150 = 150 L/S). LGB designates liquid ring vacuum pumps or rotary vane pumps used as the pre-stage (backing) pump, with the number indicating the model capacity. Together, these form a multi-stage pumping system optimized for specific vacuum levels.
Q
Why do some models with the same vacuum extraction rate have different total motor power ratings?
A
The total motor power varies because different pre-stage pump models (e.g., LGB150 vs. LGB200) are paired with the same main pump. A larger pre-stage pump provides a higher backing pressure capacity, which results in higher power consumption. The choice depends on the specific process conditions, especially the amount of gas load and the required pumping efficiency at startup or under varying pressure conditions.
Q
Are custom configurations available beyond the standard series listed in the table?
A
Yes. The table represents the recommended standard series configurations. For applications with special working conditions — such as unusual gas compositions, extreme pressure requirements, or unique throughput demands — custom unit configurations can be designed. It is recommended to consult with the manufacturer and perform detailed process calculations to determine the optimal pump combination for non-standard scenarios.