**Detailed introduction of 15 kW Roots blower**
The 15 kW Roots blower is a medium power volumetric fan widely used in fields such as sewage treatment, pneumatic conveying, and vacuum systems. Its characteristics are stable flow rate, sturdy structure, and simple maintenance, suitable for gas transportation needs of medium and low pressure and high flow rate.
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**1、 Technical parameters of 15kW Roots blower (typical values)**
|* * Parameter * * | * * Value Range * * | * * Explanation * *|
|------------------|--------------------------|-----------------------------|
|* * Power * * | 15kW (approximately 20HP) | Motor rated power|
|Flow range * * | 10-50 m3/min | depends on speed and model|
|* * Pressure range * * | 9.8~58.8 kPa (0.1~0.6 Bar) | The higher the pressure, the smaller the flow rate|
|* * Speed * * | 980~3000 rpm | Commonly used 1450/1750 rpm (4-pole/6-pole motor)|
|* * Noise * * | 75~90 dB (A) | A silencer needs to be installed to reduce noise|
|* * Inlet and outlet diameter * * | DN80~DN150 (3~6 inches) | Match according to air volume|
|* * Weight * * | 300~800 kg | Cast iron casing is relatively heavy|
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**2、 Applicable scenarios for 15kW Roots blower**
1. * * Sewage treatment**
-Used for aerating the aeration tank (requiring anti-corrosion design, such as stainless steel shell).
-Typical configuration: 15kW fan+microporous aeration tube.
2. * * Pneumatic conveying**
-Transporting grains, cement, plastic pellets, etc. (requiring dust-proof sealing).
-Used in conjunction with a cyclone separator.
3. * * Vacuum system**
-As a primary vacuum pump (negative pressure can reach -30kPa).
4. Chemical/Metallurgical Industry**
-Transporting gas, biogas, etc. (requires explosion-proof motor and nitrogen sealing).
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**3、 Key points for selecting 15kW Roots blower**
**1. Determine flow rate and pressure**
-Example Calculation:
-If you need * * 30 m3/min @ 39.2kPa (0.4Bar) * *, choose the 15kW model (refer to the performance curve).
-If the pressure is greater than 58.8kPa (0.6Bar), the power should be reduced or a larger model should be selected.
**2. Motor and transmission mode**
-Motor type:
-Ordinary type (IP55 protection) or explosion-proof type (ExdIIBT4).
-* * Transmission mode * *:
-* * Direct connection * * (high efficiency, low noise) or * * belt drive * * (adjustable speed).
**3. Special needs**
-Corrosion resistance: Stainless steel rotor/housing (such as 304/316L).
-* * Mute requirement * *: Install muffler+soundproof cover (can reduce noise by more than 20dB).
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**4、 Installation and maintenance of 15kW Roots blower**
**1. Installation requirements**
-* * Foundation fixation * *: concrete foundation+shock-absorbing pad (to prevent vibration transmission).
-Pipeline connection: Install flexible joints at the inlet and outlet to avoid stress damage.
-Ventilation and heat dissipation: Ensure that there is a heat dissipation space of ≥ 0.5m around the motor.
**2. Daily maintenance**
|* * Maintenance Project * * | * * Cycle * * | * * Operation Content * *|
|--------------------|------------|-----------------------------|
|Check the lubricating oil | Weekly | The oil level should be at 1/2~2/3 of the window|
|Clean the air filter | Monthly | Use compressed air to blow or replace the filter element|
|Check the tightness of the belt | Every 3 months | Deflection of 10-15mm (belt drive type)|
|Replace lubricating oil | Every 6 months | Use ISO VG68 or specified model|
|Check rotor clearance | Every year | Measure with a feeler gauge (standard 0.15~0.3mm)|
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**5、 Common fault handling**
|* * Fault phenomenon * * | * * Possible causes * * | * * Solution * *|
|--------------------|--------------------------|---------------------------|
|Insufficient air volume | Filter blockage/pipeline leakage | Clean the filter element and check the seal|
|Motor overheating | Overpressure operation/poor heat dissipation | Check pressure gauge, improve ventilation|
|Abnormal vibration | Bearing wear/loose anchor bolts | Replace bearings and tighten bolts|
|Sudden increase in noise | Rotor collision/gear damage | Shutdown inspection for clearance and gear engagement|
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**6、 Market mainstream brands and price references**
|* * Brand * * | * * Model Example * * | * * Price Range (RMB) * * | * * Features * *|
|---------------|------------------|------------------|-----------------------------|
|Shandong | -150 | 25000~35000 | High cost-effectiveness, suitable for sewage treatment|
|Changsha Blower Factory | -150 | 30000~40000 | Strong durability, suitable for industrial scenarios|
|Howden | HLR-15 | 50000~80000 | Imported brand, low noise|
|| -150 | 35000~45000 | Explosion proof type optional, commonly used in the chemical industry|
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**7、 Selection suggestions**
1. * * Normal working conditions * * (such as sewage treatment): Choose the * * series * *, which is economical and practical.
2. Explosion proof requirements (such as in the chemical industry): Choose the explosion-proof type.
3. * * High reliability requirements * *: Consider the * * Houghton HLRs series * * (long-life design).
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**Summary**
The 15kW Roots blower is a typical representative of medium power blowers, and when selecting, special attention should be paid to flow rate, pressure, medium characteristics, and sealing requirements. Regular maintenance can significantly extend the lifespan of equipment, and it is recommended to conduct professional maintenance every six months. If selection is required, it is recommended to provide specific operating parameters for consultation with the manufacturer.
