China Oil-Free Screw Vacuum Pump Technology | Reliable Suppliers & Factory Quality
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Composed of counter-rotating screws, pump body, end cover, sealing components, etc., the structure is very simple
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Independently produced and manufactured, with over 40 patent technologies, rated as a high-tech enterprise and a science and technology enterprise, and has passed ISO9001 quality management system certification
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Dry operation, no need for any working medium, thus no oil pollution, no wastewater discharge, and significant energy-saving effect
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Core components are processed by imported processing equipment from Japan, with precision up to 0.001mm
Product Parameters
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| Model Number | Vacuum Extraction Rate (L/S) | Power (KW) | Limiting Pressure (Pa) | Speed (rpm) | Cooling Water (L/min) |
|---|---|---|---|---|---|
| LGB-10 | 10 | 1.1 | 5 | 2900 | 0 |
| LGB-15 | 15 | 1.5 | 5 | 2900 | 0 |
| LGB-20 | 20 | 2.2 | 5 | 2900 | 0 |
| LGB-50 | 50 | 5.5 | 5 | 2900 | 8 |
| LGB-80 | 80 | 7.5 | 5 | 2900 | 10 |
| LGB-120 | 120 | 11 | 5 | 2900 | 12 |
| LGB-150 | 150 | 15 | 5 | 2900 | 14 |
| LGB-200 | 200 | 18.5 | 5 | 2900 | 18 |
| LGB-220 | 220 | 22 | 5 | 2900 | 20 |
| LGB-300 | 300 | 30 | 5 | 2900 | 25 |
| LGB-400 | 400 | 37 | 5 | 2900 | 30 |
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Frequently Asked Questions
Q
What does the vacuum extraction rate (L/S) indicate in the LGB series pump specifications?
The vacuum extraction rate, measured in liters per second (L/S), indicates how much gas volume the pump can remove from a system per second. A higher value means the pump can evacuate a chamber more quickly. The LGB series ranges from 10 L/S (LGB-10) up to 400 L/S (LGB-400), covering a wide range of industrial applications.
Q
Why do some LGB models require cooling water while others do not?
Smaller models such as LGB-10, LGB-15, and LGB-20 operate at lower power levels (1.1–2.2 KW) and generate less heat, so no cooling water is required. Larger models starting from LGB-50 (5.5 KW and above) produce significantly more heat during operation and therefore require cooling water to maintain safe operating temperatures and ensure long-term reliability.
Q
What is the limiting pressure for all LGB series models, and what does it mean?
All models in the LGB series share a uniform limiting pressure of 5 Pa. The limiting pressure (also called ultimate pressure) is the lowest pressure the pump can achieve under ideal conditions. A value of 5 Pa indicates that these pumps are capable of producing a medium-to-high vacuum, making them suitable for demanding industrial processes.
Q
Do all LGB series pumps operate at the same speed?
Yes, all models in the LGB series operate at a consistent speed of 2900 rpm. This standardized operating speed ensures stable vacuum performance across the entire product range, simplifies maintenance planning, and allows for predictable integration into various industrial systems.
Q
How do I choose the right LGB model for my application?
Selecting the right model depends primarily on your required vacuum extraction rate and available power supply. For smaller chambers or lighter-duty tasks, models like LGB-10 to LGB-20 are energy-efficient choices. For large-scale industrial processes requiring rapid evacuation, models such as LGB-300 or LGB-400 are recommended. Also consider whether your facility can supply adequate cooling water for models LGB-50 and above.
Q
What industries commonly use LGB series vacuum pumps?
LGB series vacuum pumps are widely used across industries including semiconductor manufacturing, chemical processing, pharmaceutical production, food packaging, metallurgy, and scientific research. Their broad range of extraction rates (10–400 L/S) and consistent limiting pressure of 5 Pa make them versatile solutions for both light and heavy-duty vacuum requirements.