The following is a typical sample parameter table of Roots blower for selection reference. The model names and parameters of different manufacturers (such as,,, etc.) may vary slightly, but the core parameters are similar.
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**Sample parameter table of Roots blower (example)**
|Model * * | Airflow (m3/min) * * | Pressure (kPa) * * | Power (kW) * * | Speed (rpm) * * | Inlet and outlet diameter (mm) * * | Noise (dB) * * | Transmission mode * * | Cooling mode * *|
|----------------|------------------|--------------|-------------|--------------|------------------|-------------|------------|------------|
| -50 | 0.5~1.2 | 9.8~58.8 | 0.75~3.0 | 1450~2900 | DN50 | ≤78 | Direct connection/belt | air-cooled|
| -80 | 1.5~3.0 | 9.8~78.4 | 2.2~7.5 | 1450~2900 | DN80 | ≤80 | Direct connection/belt | air-cooled|
| -100 | 3.5~7.0 | 9.8~98.0 | 5.5~15 | 1450~2900 | DN100 | ≤85 | Direct connection | air-cooled/water-cooled|
| -150 | 8.0~15.0 | 9.8~98.0 | 11~30 | 980~1450 | DN150 | ≤88 | Direct connection | Water cooling|
| -200 | 16.0~30.0 | 9.8~98.0 | 22~75 | 980~1450 | DN200 | ≤90 | Direct connection | Water cooling|
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**Parameter Description**
1. * * Model**
-Usually represented by caliber (such as -50 for outlet diameter of 50mm) or air volume/pressure code.
-Example: * * * (Three Leaf Roots), * * MJL * * (Dense Type), * * SR * * (High Voltage Type).
2. * * Airflow (m3/min)**
-The displacement under standard conditions (usually calculated at 20 ℃, 101.3kPa, and relative humidity of 50).
-* * Note * *: The actual air volume slightly decreases with increasing pressure.
3. * * Pressure (kPa)**
-Rated working pressure range (commonly 9.8~98kPa, high-pressure type can reach 200kPa).
-When selecting, a margin of 10-15 should be reserved.
4. * * Power (kW)**
-The rated power of the motor is positively correlated with air volume and pressure.
-High voltage or high flow models require higher power (such as -200 up to 75kW).
5. * * Speed (rpm)**
-The direct connection type is usually synchronized with the motor speed (such as 1450/2900rpm), and the belt drive can be adjusted.
-The low-speed model (980rpm) is suitable for high-pressure scenarios.
6. Inlet and outlet diameter (mm)**
-It needs to be matched with the pipeline to avoid pressure loss caused by diameter reduction.
7. * * Noise (dB)**
-Measured at a distance of 1m, installing a muffler can reduce noise by 10-15 dB.
8. * * Transmission mode**
-* * Direct connection * *: suitable for fixed speed; **Belt * *: Adjustable speed, low cost.
9. * * Cooling method**
-* * Air cooling * *: ≤ 30kW commonly used; **Water cooling: High pressure or high temperature environment.
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**Special parameters (listed in some samples)**
|* * Parameter * * | * * Description * *|
|------------------|-------------------------------------------------------------------------|
|The temperature of the medium is usually ≤ 80 ℃ (high temperature types can reach up to 200 ℃ and require special sealing). |
|Lubrication method: grease lubrication (maintenance free bearings) or forced oil lubrication (high-pressure models). |
|* * Protection level * * | Motor IP54/IP55 (dustproof and waterproof), explosion-proof type Ex d IIB T4. |
|* * Weight * * | Small machines (50kg~200kg), large machines (>1000kg). |
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**Selection Example**
**Working condition requirements * *:
-Airflow: 10 m3/min
-Pressure: 49 kPa
-Medium: Air (at room temperature)
**Matching model * *:
-* * -100 * * (air volume 8-15 m3/min, pressure 49kPa, power 11-15kW, direct air-cooled).
-Optional installation: muffler, pressure relief valve, frequency converter (regulating air volume).
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**Precautions**
1. The sample data is based on standard operating conditions, and actual performance is affected by altitude, temperature, and humidity.
2. High pressure or corrosive gases require the selection of special materials (such as stainless steel impellers and fluororubber seals).
3. * * Variable frequency control * * can save energy, but it is necessary to avoid low-frequency resonance (generally not lower than 25Hz).
If you need a complete sample of a specific model, you can provide the manufacturer's name or detailed operating conditions for further inquiry!
