Deman ORV Screw Blower: Redefining Efficiency in Low-Pressure Applications
For decades, Roots blowers have been the conventional choice for low-pressure applications. However, with rising energy costs and increasing demands for operational efficiency, it’s time to reconsider. The Deman ORV Screw Blower represents a paradigm shift, offering superior efficiency and deformation resistance compared to traditional alternatives.
Technology Comparison: Screw vs Roots
Traditional Roots Blowers
Roots blowers operate on the principle of isochoric compression (constant volume). As rotors turn, air is trapped in compression chambers, but compression occurs externally due to back pressure from the discharge pipe. This external compression results in:
- Significant energy losses
- High noise levels
- Pulsating airflow
- Limited efficiency improvements
Deman ORV Screw Blower
The ORV series utilizes isentropic compression (internal compression) through precision-engineered male and female rotors. As rotors counter-rotate, the volume between them decreases progressively, compressing air internally before discharge. This fundamental design difference delivers:
- Internal compression ratio matched to application requirements
- Smooth, pulsation-free airflow
- Optimized aerodynamic performance
- Minimal energy converted to heat
Key Advantages
- Revolutionary Energy Savings
The ORV series delivers exceptional Rotor Efficiency through its optimized screw profile and internal compression design.
|
Deman ORV Screw Blower |
Traditional Roots Blower |
|
|
Pressure |
0.6 bar |
0.6 bar |
|
Motor power(kW) |
4 |
7.5 |
|
Rated air volume(m3/min) |
3.05 |
3.3 |
|
Running time (h) |
8,000 |
8,000 |
|
Power consumption (kWh ) |
32,000 |
60,000 |
Starting from a pressure of 0.5 bar, Deman ORV screw blower can save 25% to 50% of energy compared to the Roots blower. On average, the purchase cost can be recovered within one year. The energy-saving efficiency becomes increasingly prominent.
- High-Efficiency Permanent Magnet Synchronous Motor
At the heart of the ORV series lies our advanced High-Efficiency Permanent Magnet Synchronous Motor (HE-PMSM). Its power density is extremely high, and the rotor efficiency is approximately 80%-90%. What’s more, high-efficiency motor’s efficiency drops by about 5% under low load conditions.
- Intelligent Control System
Unlike Roots blowers with fixed-speed operation, the ORV series offers precise matching to actual demand and VSD (Variable Speed Drive) integration for optimal part-load efficiency . “Deman Cloud” Intelligent Remote Control System provides round-the-clock real-time monitoring
|
Deman ORV Screw Blower |
Traditional Roots Blower |
||
|
Whole Machine |
Purchase cost |
Slightly higher unit price, smaller purchase quantity |
Lower unit price, more purchase quantity |
|
Energy consumption cost |
Starting from a pressure of 0.5 bar, it can save 25% to 50% of energy compared to the Roots blower |
High |
|
|
Maintenance frequency |
Low; 2-year warranty |
Frequent; regular warranty for 1 year |
|
|
Running time |
Equipped with heat dissipation fins; low operating temperature Operate continuously for 24 hours without interruption |
High pulse; high temperature; use conservatively Switch to the backup machine approximately every 8 hours |
|
|
Vibration |
Low |
Strong |
|
|
Installation |
No specialized skills are required |
Requires specialized equipment foundation and hoisting equipment to be in place |
|
|
Noise |
Low |
High |
|
|
Control |
“Deman Cloud” Intelligent Remote Control System provides round-the-clock real-time monitoring |
No |
|
|
Main Unit |
Efficiency |
80%-90% |
50%-65% |
|
Motor |
Type |
High-Efficiency PMSM |
AC Asynchronous Motor |
|
Speed control |
High adjustment accuracy; the rotational speed can also be adjusted simply by a knob |
Narrow adjustment range; low control accuracy |
|
Conclusion: The Intelligent Choice
When comparing Motor Type options, the choice is clear. Traditional Roots blowers, while familiar, simply cannot match the efficiency, reliability, and total cost advantages of modern screw technology.
The Deman ORV screw blower represents the culmination of advanced screw design, permanent magnet motor efficiency, and intelligent control systems. For operations seeking to reduce energy costs, improve reliability, and achieve sustainability goals, the ORV series is not just an alternative—it’s the optimal solution.
Contact Deman today to discover how the ORV Screw Blower can transform your low-pressure air system.