China Industrial Screw Vacuum Pump Unit - High-Performance Solutions from Trusted Suppliers and Factory
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Product Parameters
| Unit Model | Limiting Pressure (Pa) | Vacuum Extraction Rate (L/S) | Main Pump | Middle Pump | Pre-stage Pump | Total Motor Power (KW) |
|---|---|---|---|---|---|---|
| JZJLG70-1 | ≤ 1 PaStandard Series | 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 | ≤ 0.1 PaHigh Vacuum | 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
QWhat does the "limiting pressure" mean in the JZJLG vacuum unit specifications?
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 ≤1 Pa or ≤0.1 Pa, with the ≤0.1 Pa group suitable for high-vacuum applications.
QWhat is the difference between the ≤1 Pa and ≤0.1 Pa model groups?
The ≤1 Pa group uses a two-stage configuration (main pump + pre-stage pump, no middle pump), while the ≤0.1 Pa group employs a three-stage configuration including a middle pump between the main and pre-stage pumps. This additional stage enables significantly deeper vacuum levels for more demanding industrial processes.
QHow should I select the right JZJLG unit model for my application?
Selection should be based on your actual vacuuming process requirements, including the required vacuum level, gas volume to be evacuated, gas release characteristics, condensation of non-condensable gases, and how intake pressure changes over time. It is recommended to perform detailed calculations or consult the specifications of existing equipment used under similar conditions.
QWhat is the vacuum extraction rate, and why does it matter?
The vacuum extraction rate (measured in L/S — liters per second) indicates the volume of gas the unit can remove per second. A higher extraction rate means faster evacuation of the chamber. Available rates in this series range from 70 L/S up to 2500 L/S, allowing selection based on the size of the system and required evacuation speed.
QWhat types of pumps are used in these vacuum units?
The units use ZJP or ZJ series Roots pumps as main and middle pumps, and LGB series liquid ring pumps (or rotary vane pumps) as pre-stage pumps. The combination of Roots pumps and pre-stage pumps ensures efficient performance across a wide pressure range, from atmospheric pressure down to the specified limiting pressure.
QWhat is the total motor power range of the JZJLG series, and how does it affect operating costs?
Total motor power in this series ranges from 7 KW (JZJLG70-1) to 48 KW (JZJLG2500-4.2). Higher-capacity models with greater extraction rates naturally require more power. Selecting a correctly sized unit — not oversized — is key to minimizing energy consumption and reducing long-term operating costs.