**7.5kW Roots blower detailed explanation**
The 7.5kW Roots blower is a medium to small power volumetric blower suitable for scenarios such as sewage treatment, pneumatic conveying, and aquaculture. The following are its * * key parameters, selection suggestions, and common problem answers * *.
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**1、 Basic parameters of 7.5kW Roots blower (reference)**
|* * Parameter * * | * * Typical Range * * | * * Explanation * *|
|--------------|-------------------|--------|
|Flow rate (air volume) * * | 3-15 m3/min | Depending on pressure and speed|
|* * Pressure range * * | 9.8~58.8 kPa (0.1~0.6 kgf/cm2) | High pressure type can reach 78.4 kPa|
|* * Speed * * | 1000~3000 rpm | Affects airflow and noise|
|* * Inlet and outlet diameter * * | DN80~DN125 (3~5 inches) | Matching pipeline size|
|* * Applicable media * * | Air, biogas, nitrogen, etc. | Corrosive gases require special materials|
**Note: The specific parameters of different brands (such as,,) may vary, and the manufacturer's information should prevail.
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**2、 Typical application of 7.5kW Roots blower**
1. * * Sewage treatment**
-Aeration in small-scale sewage treatment plants (water depth of 2-4m, pressure of 19.6-39.2kPa).
2. * * Aquaculture**
-Fish pond and shrimp pond oxygenation (low pressure, 9.8~19.6kPa).
3. * * Pneumatic conveying**
-Grain, feed, and plastic pellet transportation (requiring medium pressure, 29.4-58.8kPa).
4. * * Small industrial gas supply**
-Such as combustion furnace combustion air and reaction kettle gas circulation.
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**3、 Key factors for selection**
1. * * Determine air volume requirements**
-Example: According to the estimation of 1kW/acre for fish pond oxygenation, 7.5kW can cover 5-8 acres of water.
2. * * Calculate system pressure**
-Aeration pressure ≈ water depth × 9.8 kPa (e.g. 3m water depth ≈ 29.4kPa).
3. * * Matching speed**
-Low speed (1450rpm) is quieter, while high speed (2900rpm) provides greater airflow.
4. * * Cooling method**
-Standard type: air-cooled (<58.8kPa)
-High pressure type: water-cooled (>58.8kPa)
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**4、 Key points for installation and maintenance**
**Installation suggestions**
-Install * * soft connections+check valves * * for import and export to prevent vibration and gas backflow.
-Basic shock-absorbing treatment (rubber pads or shock absorbers).
**Maintenance precautions**
-Check the gear oil every 3 months and replace it if necessary.
-Regularly clean the intake filter to prevent dust from damaging the impeller.
-Monitor bearing temperature (normal ≤ 80 ℃).
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**5、 Common Problems and Solutions**
|* * Fault phenomenon * * | * * Possible causes * * | * * Solution * *|
|------------|------------|------------|
|Insufficient air volume | Filter blockage, belt slippage | Clean the filter and adjust belt tension|
|* * Abnormal vibration * * | Unbalanced impeller, loose foundation bolts | Re calibrate impeller, tighten bolts|
|Overheating shutdown | Overpressure operation, poor cooling | Check system resistance to ensure ventilation and heat dissipation|
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**6、 7.5kW Roots blower vs other power**
|* * Power * * | * * Typical Airflow (m3/min) * * | * * Applicable Scenarios * *|
|--------|---------------------|------------|
|4kW | 2~8 | Small fish pond oxygenation|
|7.5kW | 3~15 | Small and medium-sized sewage treatment plants, pneumatic conveying|
|15kW | 10~25 | Medium sized aeration, industrial gas supply|
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**7、 Mainstream brand recommendations**
|* * Brand * * | * * Features * * | * * Typical Models * *|
|--------|--------|------------|
|* * (JG) * * | High cost-effectiveness and durability | JG-SR50 (7.5kW)|
|* * * * | High Voltage Stability | -65 (7.5kW)|
|* * (BST) * * | Low noise and energy-saving | BST-80 (7.5kW)|
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**8、 Summary**
The 7.5kW Roots blower is suitable for small and medium-sized gas transportation. When selecting, it is necessary to match the flow rate, pressure, and speed, and pay attention to maintenance.
**Suggestion * *:
-Select * * high wind volume model * * (such as 10m3/min) for low-pressure scenarios (<29.4kPa).
-Select the water-cooled reinforced type for high-pressure scenarios (>49kPa) to avoid overheating.
For precise selection, specific operating conditions (such as medium, pressure, ambient temperature) can be provided to recommend suitable models!
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