The following is a comparison table and selection guide for common Roots blower models, covering the model rules and parameter matching of mainstream brands (such as,,, etc.) to help you quickly select or replace:
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**1、 Brand Roots blower model comparison table**
|* * Brand/Series * * | * * Model Example * * | * * Parameter Meaning * * | * * Airflow Range * * | * * Pressure Range * *|
|---------------|--------------------|---------------------------------------|---------------|------------------|
|* * * * | -50 |: Three Leaf Series; 50: Imported caliber 50mm | 0.5~15 m3/min | 9.8~58.8 kPa|
|| -65 |: High voltage type; 65: Airflow code (to be checked) | 10-30 m3/min | 58.8-78.4 kPa|
|* * Shandong * * | L22WD | L: Roots; 22: Air volume 2.2m3/min; W： Two leaves | 0.5~200 m3/min | 9.8~78.4 kPa|
|ML-63 | ML: Dense; 63: Rotor diameter 63mm | 5-50 m3/min | 9.8~49 kPa|
|* * * * | BSR-50 | BSR: Three Leaf; 50: Export diameter DN50 | 1~20 m3/min | 9.8~58.8 kPa|
|Changsha blower * * | C-40 | C: Conventional series; 40: Air volume 4.0m3/min | 0.5~100 m3/min | 9.8~98 kPa|
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**2、 Brand and model comparison**
|* * Brand * * | * * Model Example * * | * * Parameter Meaning * * | * * Corresponding to Domestic Models * *|
|---------------|--------------------|---------------------------------------|------------------|
|* * Japan Daiko * * | OHB-150 | OHB: Type; 150: Air volume 15.0m3/min | Similar to -150|
|GM-12L | GM: Roots series; 12: Specification code; L： Low noise | Similar to ML-80|
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**3、 Analysis of key parameters of the model**
1. * * Airflow identification**
-Direct numbers: For example, "22" in L22WD represents 2.2 m3/min.
-Code matching: For example, -65 requires checking the manufacturer's air volume meter (65 corresponds to 10 m3/min).
2. * * Leaf type**
-W/D: Two leaves (such as L22WD).
-S/T: Three leaves (e.g. -50).
3. * * Pressure level**
-Conventional type: ≤ 58.8 kPa (as in the series).
-High voltage type: ≤ 78.4 kPa (as in the series).
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**4、 Selection comparison steps**
1. * * Determine the required parameters * *:
-Airflow (m3/min), pressure (kPa), medium (air/special gas).
2. * * Matching model rules * *:
-Example: The required air volume is 10 m3/min and the pressure is 49 kPa. Choose -80 or ML-40.
3. * * Alternative model reference * *:
-If the original fan is a two blade L22WD (2.2m3/min), it can be upgraded to a three blade-25 (with the same air volume, more energy-efficient).
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**5、 General model replacement principle**
|* * Original Model * * | * * Replacement Model * * | * * Replacement Basis * *|
|---------------|--------------------|--------------------------------------|
|-50 | ML-32 | Airflow ≈ 5 m3/min, pressure ≤ 58.8 kPa|
|BSR-80 | Changsha blower C-80 | Same air volume (8 m3/min), same pressure rating|
|Japan Ohashi OHB-100 | -100 | Airflow 10 m3/min, Three Leaf Design|
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**6、 Precautions**
1. * * Non standard models * *: Some manufacturers require separate parameters for customized models (such as explosion-proof and anti-corrosion).
2. Import substitution: The brand needs to verify the interface size (such as flange standard ANSI vs. GB).
3. * * Energy Efficiency Difference * *: Under the same parameters, a three bladed fan saves 10-20% energy compared to a two bladed fan.
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**7、 Method for obtaining accurate models**
1. * * Nameplate query * *: Record the original fan model, air volume, pressure, and power.
2. * * Manufacturer's Manual * *: Contact the supplier to provide a selection table (e.g. download PDF from the official website).
3. Online selection tool: Some brands provide parameter input to automatically match models.
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**Attachment: Quick Selection Table (Normal Operating Conditions)**
|* * Airflow (m3/min) * * | * * Pressure (kPa) * * | * * Recommended Model (Three Leaves) * * | * * Motor Power (kW) * *|
|-------------------|----------------|----------------------|-------------------|
| 1.0 | 49 | -15 | 1.5 |
| 5.0 | 58.8 | -50 | 7.5 |
| 15.0 | 78.4 | -100 | 22 |
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If specific model replacement or parameter verification is required, please provide the original fan nameplate information or operating condition requirements!
