China Standard Roots Blower Gas Compressor for Air Delivery Gas Combustion with Great quality

Product Description

Sewage Treatment Roots Blower for Wastewater Treatment Plant

Roots Blowers Operational Principle
Roots blower is a dual-rotor compression machine, the axial directions of the 2 rotors are parallel to each other. The rotor is composed of an impeller and a shaft. There are small gaps between the impeller and the impeller, the impeller and the casing and the wallboard to avoid mutual contact and friction. The 2 pairs of rotors are driven by the prime mover through a pair of synchronous gears, and rotate in opposite directions at a constant speed.

With the mutual meshing of the 2 gears, the inlet and outlet of the blower are not directly communicated. The impeller, the casing and the wall panel form a closed elementary volume to achieve the effect of conveying gas.

Introduction of Roots Blower
Roots blowers were only used for positive pressure blowing at first, and later developed into the vacuum field, evolving roots vacuum pumps. When the air inlet is at normal local atmospheric pressure, its exhaust gauge pressure range is generally 9.8~200kpa. When used as a vacuum pump, the vacuum degree of direct exhaust air can reach -9.8~-80kpa.

Although roots blowers and roots vacuum pumps are nominally divided into blowers and vacuum pumps, they all work near atmospheric pressure and there is not much difference in pressure characteristics.

Rotary speed (r/min) Pressure rise (kPa) Capacity (m3/min) Shaft power (kW) Motor Type Motor Power (kW)
1400 9.8 22.00 10.20 Y160L-4 15
14.7 21.85 12.12 Y160L-4 15
19.6 21.72 14.03 Y180M-4 18.5
24.5 21.53 15.93 Y180M-4 18.5
29.4 21.42 17.92 Y180L-4 22
34.3 21.32 19.92 Y200L-4 30
39.2 21.23 21.92 Y200L-4 30
44.1 21.17 23.83 Y200L-4 30
49 21.07 25.83 Y200L-4 30
53.9 20.95 27.93 Y225S-4 37
58.8 20.85 29.72 Y225S-4 37
63.7 20.76 33.34 Y225S-4 37
68.6 20.63 35.85 Y225M-4 45
73.5 20.45 37.97 Y225M-4 45
78.4 20.33 40.13 Y225M-4 45
83.3 20.18 43.00 Y250M-4 55
88.2 20.03 46.10 Y250M-4 55
93.1 19.88 49.80 Y250M-4 55
98.0 19.72 52.00 Y280S-4 75

Notes: For more Roots blower models, please contact us for details!

Features of Roots blower
Compared with other types of gas compressors, Roots blowers have the following characteristics:
1. Because it is a positive displacement blower, it has the characteristics of forced rise. Under the condition of a certain speed, the flow is also certain. In the small flow area in time, there will be no surging phenomenon like a centrifugal blower, and it has relatively stable working characteristics.
2. As a rotary machine, there is no reciprocating motion mechanism and air valve, and there are few wearing parts, so it has a long service life and good power balance. It can run at a higher speed without building a heavy foundation.
3. There is a small gap between the impeller, between the impeller and the wallboard and the casing. It does not require oil lubrication like screw and sliding vane compressors during operation. Therefore, it can ensure that the conveyed gas does not contain oil and does not need to use gas. Auxiliary equipment such as oil separator.
4. Except for synchronous gears and bearings, there is no other mechanical friction, so the mechanical efficiency is high.
5. In addition, the Roots blower also has the advantages of simple structure, convenient operation, cheap maintenance, and long maintenance period.

As a typical gas pressurizing and conveying machine, Roots blower has a wide range of characteristics in its specific pressure area. The flow rate is usually 0.5~800m3/min, and the maximum can reach about 1400m3/min. The single-stage working pressure is -53.3~98kPa. When double-clicking in series, it can achieve -80~200kpa.

In terms of application, Roots blowers are mostly used as air blowers. It is used in many fields such as building materials, electric power, smelting, chemical and petrochemical, mining, ports, textiles, medicine, papermaking, and aquatic products. In addition, it can also be used to transport gases other than air, such as biogas, hydrogen, industrial oxygen, carbon monoxide, carbon dioxide, and methane. Acetylene, gas, etc.

Notes: For more Roots blower models, please contact us for details!

Material: Iron
Usage: Gas Pressure Rise
Flow Direction: Axial Flow
Pressure: Low Pressure
Certification: ISO
Application: Air, Biogas, Hydrogen, Industrial Oxygen


air compressor

How does variable speed drive technology improve air compressor efficiency?

Variable Speed Drive (VSD) technology improves air compressor efficiency by allowing the compressor to adjust its motor speed to match the compressed air demand. This technology offers several benefits that contribute to energy savings and enhanced overall system efficiency. Here’s how VSD technology improves air compressor efficiency:

1. Matching Air Demand:

Air compressors equipped with VSD technology can vary the motor speed to precisely match the required compressed air output. Traditional fixed-speed compressors operate at a constant speed regardless of the actual demand, leading to energy wastage during periods of lower air demand. VSD compressors, on the other hand, ramp up or down the motor speed to deliver the necessary amount of compressed air, ensuring optimal energy utilization.

2. Reduced Unloaded Running Time:

Fixed-speed compressors often run unloaded during periods of low demand, where they continue to consume energy without producing compressed air. VSD technology eliminates or significantly reduces this unloaded running time by adjusting the motor speed to closely follow the air demand. As a result, VSD compressors minimize energy wastage during idle periods, leading to improved efficiency.

3. Soft Starting:

Traditional fixed-speed compressors experience high inrush currents during startup, which can strain the electrical system and cause voltage dips. VSD compressors utilize soft starting capabilities, gradually ramping up the motor speed instead of instantly reaching full speed. This soft starting feature reduces mechanical and electrical stress, ensuring a smooth and controlled startup, and minimizing energy spikes.

4. Energy Savings at Partial Load:

In many applications, compressed air demand varies throughout the day or during different production cycles. VSD compressors excel in such scenarios by operating at lower speeds during periods of lower demand. Since power consumption is proportional to motor speed, running the compressor at reduced speeds significantly reduces energy consumption compared to fixed-speed compressors that operate at a constant speed regardless of the demand.

5. Elimination of On/Off Cycling:

Fixed-speed compressors often use on/off cycling to adjust the compressed air output. This cycling can result in frequent starts and stops, which consume more energy and cause mechanical wear. VSD compressors eliminate the need for on/off cycling by continuously adjusting the motor speed to meet the demand. By operating at a consistent speed within the required range, VSD compressors minimize energy losses associated with frequent cycling.

6. Enhanced System Control:

VSD compressors offer advanced control capabilities, allowing for precise monitoring and adjustment of the compressed air system. These systems can integrate with sensors and control algorithms to maintain optimal system pressure, minimize pressure fluctuations, and prevent excessive energy consumption. The ability to fine-tune the compressor’s output based on real-time demand contributes to improved overall system efficiency.

By utilizing variable speed drive technology, air compressors can achieve significant energy savings, reduce operational costs, and enhance their environmental sustainability by minimizing energy wastage and optimizing efficiency.

air compressor

What are the environmental considerations when using air compressors?

When using air compressors, there are several environmental considerations to keep in mind. Here’s an in-depth look at some of the key factors:

Energy Efficiency:

Energy efficiency is a crucial environmental consideration when using air compressors. Compressing air requires a significant amount of energy, and inefficient compressors can consume excessive power, leading to higher energy consumption and increased greenhouse gas emissions. It is important to choose energy-efficient air compressors that incorporate features such as Variable Speed Drive (VSD) technology and efficient motor design, as they can help minimize energy waste and reduce the carbon footprint.

Air Leakage:

Air leakage is a common issue in compressed air systems and can contribute to energy waste and environmental impact. Leaks in the system result in the continuous release of compressed air, requiring the compressor to work harder and consume more energy to maintain the desired pressure. Regular inspection and maintenance of the compressed air system to detect and repair leaks can help reduce air loss and improve overall energy efficiency.

Noise Pollution:

Air compressors can generate significant noise levels during operation, which can contribute to noise pollution. Prolonged exposure to high noise levels can have detrimental effects on human health and well-being and can also impact the surrounding environment and wildlife. It is important to consider noise reduction measures such as sound insulation, proper equipment placement, and using quieter compressor models to mitigate the impact of noise pollution.


While air compressors do not directly emit pollutants, the electricity or fuel used to power them can have an environmental impact. If the electricity is generated from fossil fuels, the associated emissions from power plants contribute to air pollution and greenhouse gas emissions. Choosing energy sources with lower emissions, such as renewable energy, can help reduce the environmental impact of operating air compressors.

Proper Waste Management:

Proper waste management is essential when using air compressors. This includes the appropriate disposal of compressor lubricants, filters, and other maintenance-related materials. It is important to follow local regulations and guidelines for waste disposal to prevent contamination of soil, water, or air and minimize the environmental impact.

Sustainable Practices:

Adopting sustainable practices can further reduce the environmental impact of using air compressors. This can include implementing preventive maintenance programs to optimize performance, reducing idle time, and promoting responsible use of compressed air by avoiding overpressurization and optimizing system design.

By considering these environmental factors and taking appropriate measures, it is possible to minimize the environmental impact associated with the use of air compressors. Choosing energy-efficient models, addressing air leaks, managing waste properly, and adopting sustainable practices can contribute to a more environmentally friendly operation.

air compressor

How is air pressure measured in air compressors?

Air pressure in air compressors is typically measured using one of two common units: pounds per square inch (PSI) or bar. Here’s a brief explanation of how air pressure is measured in air compressors:

1. Pounds per Square Inch (PSI): PSI is the most widely used unit of pressure measurement in air compressors, especially in North America. It represents the force exerted by one pound of force over an area of one square inch. Air pressure gauges on air compressors often display pressure readings in PSI, allowing users to monitor and adjust the pressure accordingly.

2. Bar: Bar is another unit of pressure commonly used in air compressors, particularly in Europe and many other parts of the world. It is a metric unit of pressure equal to 100,000 pascals (Pa). Air compressors may have pressure gauges that display readings in bar, providing an alternative measurement option for users in those regions.

To measure air pressure in an air compressor, a pressure gauge is typically installed on the compressor’s outlet or receiver tank. The gauge is designed to measure the force exerted by the compressed air and display the reading in the specified unit, such as PSI or bar.

It’s important to note that the air pressure indicated on the gauge represents the pressure at a specific point in the air compressor system, typically at the outlet or tank. The actual pressure experienced at the point of use may vary due to factors such as pressure drop in the air lines or restrictions caused by fittings and tools.

When using an air compressor, it is essential to set the pressure to the appropriate level required for the specific application. Different tools and equipment have different pressure requirements, and exceeding the recommended pressure can lead to damage or unsafe operation. Most air compressors allow users to adjust the pressure output using a pressure regulator or similar control mechanism.

Regular monitoring of the air pressure in an air compressor is crucial to ensure optimal performance, efficiency, and safe operation. By understanding the units of measurement and using pressure gauges appropriately, users can maintain the desired air pressure levels in their air compressor systems.

China Standard Roots Blower Gas Compressor for Air Delivery Gas Combustion   with Great qualityChina Standard Roots Blower Gas Compressor for Air Delivery Gas Combustion   with Great quality
editor by CX 2023-10-03