**Price Guide for 7.5 kW Roots Wind Turbine (2025)**
The price of a 7.5kW Roots blower varies depending on the brand, material, and configuration. Domestic models typically range from 12000 to 35000 yuan, while imported models can cost up to 40000 to 80000 yuan. The following is a detailed analysis:
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**1、 Price range (brand new machine)**
|* * Brand Type * * | Price Range (RMB) | Feature Description|
|--------------------|------------------|--------------------------|
|* * Domestic economy type * * | 12000~18000 | Local small factory, basic configuration, suitable for short-term use|
|* * Domestic mainstream brands * * | 18000~25000 |, etc., with high cost-effectiveness|
|* * Domestic high-end/stainless steel * * | 25000~35000 | 304/316L material, corrosion-resistant|
|Imported brand * * | 40000~80000 |, high-precision|
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**2、 Key factors affecting prices**
**1. Material differences**
-* * Cast iron standard type * * (18000~22000): suitable for ordinary air transportation.
-Stainless steel anti-corrosion type (25000~35000): resistant to acid and alkali corrosion, suitable for chemical and sewage treatment.
**2. Technical configuration**
-* * Variable frequency control * *:+50000~10000 (energy-saving 20-30).
-Explosion proof motor (Exd IIB T4):+80000 to 15000 yuan (for petrochemical and biogas projects).
-* * Silencing System * *: Soundproofing Cover+30000-080000 (Noise Reduction 15-25dB).
**3. Accessories and after-sales service**
-Imported bearings (such as SKF/NSK):+0.2000~0.4000 (extended lifespan).
-* * Extended warranty * * (2-3 years):+0.1 thousand~0.3 thousand.
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**3、 Reference for mainstream brand pricing**
|Brand * * | Model Example | Price Range (7.5kW) | Features|
|---------------|--------------|------------------|----------------------|
|* * Shandong * * | -7.5 | 18000~22000 | High cost performance, perfect after-sales service|
|* * Jiangsu * * | HC-50S | 20000~25000 | Low noise design|
|Zhejiang * * | -7.5 | 22000~28000 | Explosion proof models available|
|* * * * | RBS-75 | 50000~70000 | High precision, long lifespan|
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**4、 Purchase suggestions**
**1. Choose according to the purpose**
-* * Sewage treatment/aquaculture * * → Ordinary cast iron version (18000~25000).
-Chemical/electroplating waste gas → Stainless steel version (25000~35000).
-* * Food/pharmaceutical industry * * → 304/316L stainless steel+oil-free design (30000~40000).
**2. Cost optimization techniques**
-Directly contact the manufacturer (10-20 cheaper than the dealer).
-* * Choose belt drive * * (cheaper than direct connection by 30000-50000pm).
**3. Guide to Avoiding Pits**
-Be cautious of models below 12000 yuan (which may use refurbished parts or inferior castings).
-Request to provide * * performance test report * * and * * material certification * * (especially for stainless steel models).
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**5、 Frequently Asked Questions**
**Q1: How much does a 7.5kW Roots blower consume per hour? **
A: The actual power consumption is approximately 7.5kW x load rate (usually 0.7~0.9), which is 5-7 kWh/hour. Frequency conversion can reduce it by 10-20.
**Q2: Do you need a soundproof cover? **
A: If installed near residential areas, it is recommended to install (with a noise level of about 80-90dB), which will increase the budget by 30000-80000 yuan.
**Q3: Is second-hand equipment worth buying? **
A: The second-hand price is about 8000 to 15000 yuan, but professional inspection of impeller clearance and bearing condition is required, which poses a higher risk.
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**6、 Alternative solution reference**
-Screw fan: With the same power of about 30000 to 50000 yuan, it is more energy-efficient but expensive.
-Centrifugal fan: Suitable for high pressure demand (>58.8kPa), but with poor air flow stability.
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**Summary**
-Choose domestic economy models (18000~25000 yuan).
-Choose stainless steel for high corrosion environments (25000~35000).
-Consider frequency conversion for long-term operation (+50000~10000, saving thousands of yuan in annual electricity bills).
For accurate quotation, please provide information such as air volume, pressure, and medium!
