The following is a comparison table of power, air volume, and pressure for Roots blowers, covering the air volume range of common models (0.75kW~160kW) at different pressures. It is suitable for quick selection reference in sewage treatment, pneumatic conveying, chemical and other scenarios.
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**1、 Comparison Table of Roots Fan Power Air Volume Pressure (Three Leaf Type)**
|* * Power (kW) * * | * * Pressure (kPa) * * | * * Airflow Range (m3/min) * * | * * Typical Application Scenarios * * | * * Representative Models * *|
|---------------|----------------|------------------------|---------------------------|-------------------------|
|0.75 * * | 9.8 | 0.3~0.8 | Laboratory aeration, small fish pond | GMRS-50A|
|* * 1.5 * * | 19.6 | 0.5~1.5 | Micro pneumatic conveying, water treatment | -50|
|* * * * | 29.4 | 1.2~3.5 | Small scale sewage treatment, food packaging | HC-80|
|5.5 * * | 39.2 | 2.5~6 | Aquaculture oxygenation, light industry transportation | GMRS-80|
|7.5 * * | 49 | 4~9 | Medium sized aeration tank, cement conveying | -100|
|* * 11 * * | 58.8 | 6~12 | Chemical reaction kettle, powder conveying | HC-151|
|* * 15 * * | 58.8 | 10~18 | Industrial dust removal and desulfurization system | GMRS-125|
|* * 22 * * | 49 | 20~30 | Sewage treatment (AAO process) | -200|
|* * 30 * * | 58.8 | 25~40 | Pneumatic conveying (sand, gravel, grain) | HC-251|
|37 * * | 78.4 | 20~35 | Blast furnace blowing and high-pressure conveying | GMRS-200|
|* * 45 * * | 98 | 18~30 | Steel plants, large pneumatic pumps | -250|
|* * 55 * * | 58.8 | 40~65 | Municipal sewage treatment (100000 tons/day) | HC-351|
|* * 75 * * | 78.4 | 50~80 | Mining and power plant desulfurization | GMRS-250|
|* * 90 * * | 98 | 45~70 | Petrochemical and high-pressure reactions | GM 12L|
|* * 110 * * | 58.8 | 90~120 | Large scale aeration system (200000 tons/day) | -350|
|* * 160 * * | 78.4 | 120~180 | Ultra large pneumatic conveying and metallurgy | Hibon RBS-300|
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**2、 Key factors for selection**
1. The inverse relationship between pressure and air volume**
-At the same power, when the pressure increases, the air volume decreases
-Example: A 22kW fan has an air volume of 25m3/min at 49kPa. If the pressure rises to 78.4kPa, the air volume decreases to about 15m3/min.
2. * * Efficiency difference**
-Imported brands (such as Hibon) have air volume 5-10 higher than domestic models of the same power (with better rotor sealing).
3. * * Variable frequency regulation**
-The variable frequency fan can be adjusted within the range of * * 30~* * rated air volume (such as a 22kW variable frequency fan with an adjustable air volume of 7.5~25m3/min).
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**3、 Selection Calculation Example**
**Scenario requirement * *: Sewage treatment aeration requires an air volume of 30m3/min and a pressure of 49kPa.
1. * * Check the table * *: Preliminary matching of 22kW models (air volume of 20~30m3/min at 49kPa).
2. * * Reserve allowance * *: Choose * * 30kW * * (air volume 25~40m3/min) to avoid long-term full load operation.
3. * * Verification * *: Check the manufacturer's performance curve to ensure that the operating point is located in the zone (usually 60-80 load).
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**4、 Precautions**
1. * * Elevation correction**
-For every 1000 meters increase in altitude, the air volume decreases by about 10 (high-power compensation is required).
2. Temperature impact**
-When the medium temperature is greater than 40 ℃, the air volume needs to be reduced by * * 1/℃ * * (such as in a 50 ℃ environment, the air volume is multiplied by 0.9).
3. Pipeline loss**
-For every 10 meters of horizontal pipeline, the resistance increases by about 0.1 kPa, and the equivalent length of the elbow increases by 1-3 meters.
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**5、 Recommended Brands and Features**
|* * Brand * * | * * Advantages * * | * * Applicable Scenarios * *|
|---------------|---------------------------|---------------------------|
|* * * * | High cost-effectiveness and easy maintenance | Small and medium-sized sewage treatment and aquaculture|
|* * * * | Dust resistant design, long lifespan | Mining and cement industries|
|* * * * | Technology, Low Noise | Precision Chemicals, Food and Medicine|
|* * Hibon * * | Energy saving, good adaptability to frequency conversion | Large municipal engineering and power plants|
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For precise selection, please provide * * specific pressure and medium characteristics (such as humidity and corrosiveness) * *, which can be further optimized and recommended!
