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This is a highly specialized industrial air compressor engineered to deliver low-pressure air (e.g., 2-5 bar) with maximum efficiency. It integrates a Two-Stage compression process within a design optimized for low-pressure output, powered by a high-efficiency Permanent Magnet (PM) Variable Frequency Drive (VFD) motor. The "Single-Stage Low-Pressure" in the name often refers to its final output class, despite using a two-stage mechanism to achieve it efficiently.
Product Parameters
| Low-pressure PM VSD Screw air compressor | |||||||
| Model | Air Delivery (m3/min) | Working pressure (bar) | Power (kW/hp) | Noise dB(A) | Outlet diameter | Dimensions (mm) | Weight (kg) |
| L * W * H | |||||||
| RL125APM | 34.0 | 2 | 90/125 | 76 | DN125 | 3000*1900*1950 | 3500 |
| 28.0 | 3 | 90/125 | 76 | DN100 | 2500*1650*1900 | 3100 | |
| 24.0 | 4 | 90/125 | 76 | DN100 | 2500*1650*1900 | 3000 | |
| 20.0 | 5 | 90/125 | 76 | DN80 | 2500*1650*1900 | 2950 | |
| RL150APM | 43.0 | 2 | 110/150 | 76 | DN200 | 3600*2200*2200 | 5300 |
| 34.0 | 3 | 110/150 | 76 | DN125 | 3000*1900*1950 | 4000 | |
| 29.6 | 4 | 110/150 | 76 | DN100 | 3000*1900*1950 | 3500 | |
| 24.0 | 5 | 110/150 | 76 | DN80 | 3000*1900*1950 | 3200 | |
| RL175APM | 52.0 | 2 | 132/175 | 76 | DN200 | 3600*2200*2200 | 5800 |
| 42.0 | 3 | 132/175 | 76 | DN125 | 3000*1900*1950 | 4300 | |
| 36.5 | 4 | 132/175 | 76 | DN100 | 3000*1900*1950 | 4100 | |
| 30.5 | 5 | 132/175 | 76 | DN80 | 3000*1900*1950 | 3700 | |
Low pressure PM VSD air compressor features
• Ultimate Energy Savings
The core benefit. The combination of a PM VFD motor and a two-stage, low-pressure optimized air end achieves unparalleled efficiency, often saving 30-50% in energy costs compared to standard compressors operating with pressure-reducing valves.
• Exceptional Stability
Provides extremely stable air pressure, which is critical for sensitive manufacturing equipment and consistent product quality.
• Quiet & Reliable
Designed to run cooler and quieter under low-pressure conditions, reducing wear and extending the machine's operational life.
• Intelligent Control
The VFD technology allows the compressor to perfectly match its output to the air demand in real-time, eliminating energy waste during low-load periods.
Main Applications
It is the ideal solution for industries that are highly energy-intensive and require large volumes of stable, low-pressure air:
• Textile Manufacturing: Powering air-jet looms.
• Lith-ion Battery Production: Electrode drying and coating processes.
• Chemical & Pharmaceutical: Pneumatic conveying of powders and fermentation.
• Food & Beverage: Bottling, fermentation, and pneumatic packaging.
• Plastics: Blow molding operations.
Frequently Asked Questions (FAQ)
Q: The name has "Two-Stage" and "Single-Stage Low-Pressure." Which is it?
A: This can be confusing. It typically means the compressor uses a two-stage compression mechanism (for high efficiency) but is specifically designed and sold as a unit for single, low-pressure output applications. The "two-stage" describes the internal process, while "single-stage low-pressure" describes its application output.
Q: Why is it so much more efficient for low-pressure needs?
A: Standard compressors are inefficient for low-pressure use because they produce high-pressure air (e.g., 8-10 bar) and then waste energy by throttling it down. This machine is engineered from the ground up to produce only the low pressure you need, eliminating that waste.
Q: Is the high initial cost justified?
A: Absolutely. For facilities with high air consumption at low pressure, the massive energy savings typically lead to a Return on Investment (ROI) in 1-3 years. The compressor pays for itself through lower electricity bills.
Q: How do I select the right model?
A: You need two key pieces of information:
(1) Your exact required working pressure (in bar)and
(2) Your facility's maximum air consumption (in m³/min or cfm).
A compressed air audit is often recommended to determine this accurately.
