China Three Lobe Roots Blower manufacturer
B-Tohin Machine (Jiangsu) Co., Ltd.

Professional Manufacturer of Various Kinds of Blowers

Home ProductsRoots Air Blower

DN40 Roots Air Blower

DN40 Roots Air Blower

    • DN40 Roots Air Blower
  • DN40 Roots Air Blower

    Product Details:

    Place of Origin: China
    Brand Name: BK
    Certification: ISO9001/ISO14001/CE
    Model Number: BK40

    Payment & Shipping Terms:

    Minimum Order Quantity: 1 set
    Price: Negotiation
    Packaging Details: Export standard wooden case
    Delivery Time: 5 to 20 working days, depends on order amount and specification
    Payment Terms: L/C, T/T
    Supply Ability: 50 SETS per month
    Contact Now
    Detailed Product Description
    Air Capacity: 0.52-2.2m3/min Discharge Differential Pressure: 10-80KPA
    Motor Power: 1.5-5.5KW Discharge Bore: DN40
    Cooling Type: Air Connection Type: Belt And Pulley
    Rotary Speed: 1750-3000rpm
    High Light:

    roots style blower


    belt driven blowe


    10KPA - 80KPA small flow DN40 three lobe Roots blower


    10KPA - 80KPA Three Lobe Roots Blower DN40 air cooling, vertical instalation


    About BK-3
    BK-3 series roots blower inherits the design of BK series. It adopts air cooling type and improved rotor curve, which is featured of high efficiency and performance. Also this type blower is of vertical installation type for saving floor space and convenient for maintenance.






    Air capacity


    Discharge differential pressure


    Rotary speed


    Motor type

    380/400/415/440V/220V, 3PHASES, 50/60HZ, frequencytype

    Motor brand

    Standard: Siemens Beide or Wannan motor
    Siemens and ABB motor for your option

    Installation type

    Standard: horizontal type

    N.W. of blower without motor


    Packing size Approx.

    1.25*0.85*1.28m (length*width*height)





    • Optimized lobe curve is adopted for reducing blower’s internal leakage, improving blower’s efficiency and reducing running temperature.
    • After radius-center distance ratio narrowed and shaft’s diameter enlarged, no deformation and collision will occur under higher load pressure as the blower’s strength is improved.
    • Special hollow design of end-cover is used for making bearing cavity separated from gas chamber relatively, by which reduces the impact of inside high temperature gas on bearing cavity and lowers the bearing temperature.
    • Deep groove ball bearing of high precision and low friction factor is selected for lowering operation noise. In addition, because of larger size bearing matched for enlarged shaft diameter, the bearing’s load capacity is enhanced and its service life is extended.
    • A structure of 90 degree upper inlet and side outlet is adopted for convenient installation and maintenance. Different silencers are available for customers’ needs of saving floor space.







    Inlet capacity (m3/min)and shaft power (kW) under various pressure
    0.01Mpa 0.02Mpa 0.03Mpa 0.04Mpa
    m3/min KW m3/min KW m3/min KW m3/min KW
    BK40 1750 1.30  0.96  1.10  1.12  0.95  1.29  0.83  1.46 
    1850 1.33  1.01  1.13  1.19  1.00  1.37  0.90  1.55 
    2050 1.60  1.12  1.43  1.32  1.28  1.52  1.17  1.71 
    2400 1.83  1.31  1.73  1.54  1.57  1.77  1.45  2.01 
    2750 1.97  1.50  1.82  1.77  1.70  2.03  1.60  2.30 
    3000 2.20  1.64  2.15  1.93  1.97  2.22  1.88  2.51 





    Inlet capacity (m3/min)and shaft power (kW) under various pressure
    0.05Mpa 0.06Mpa 0.07Mpa 0.08Mpa
    m3/min KW m3/min KW m3/min KW m3/min KW
    BK40 1750 0.72  1.63  0.63  1.80  0.53  1.97     
    1850 0.78  1.72  0.70  1.90  0.60  2.08  0.52  2.26 
    2050 1.07  1.91  0.97  2.11  0.87  2.31  0.78  2.50 
    2400 1.35  2.24  1.27  2.47  1.18  2.70  1.10  2.93 
    2750 1.50  2.56  1.42  2.83  1.30  3.09  1.20  3.36 
    3000 1.82  2.80  1.72  3.08  1.62  3.77  1.53  4.00 



    Assembling drawing of blower package

    DN40 Roots Air Blower 0 

    1. What's the information should I provide when inquiry?
    A: Air capacity
    B: Pressure
    C: Application
    D: Use environment(Temperature, atmospheric pressure)
    E: Do you need motor?
    Or other specials you give us will be more appreciated.

    2. What is your warranty?
    Our warranty is 12 months after received the roots blower. During the warranty period, replace the damaged parts for free of charge. Out warranty period, to provide timely, high-quality technical services and price concessions spare parts to ensure continuous safe and high-quality equipment operation.

    3. How long is the service life of roots blower?
    In normal use environment
    A- Service life of blower is more than 10 years.
    B- Service life of Impeller is more than 60, 000 hours.
    C- Service life of bearing is more than 50, 000 hours.
    D- Service life of gear is more than 60, 000 hours.

    4. What is your terms of packing?
    A: Generally, we pack our goods in Fumigation Free Plywood Case. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.

    5. How does your factory control product quality?
    We have quality inspection department. Before sending out product, we check each product. If there is quality problem, we will produce new one.

    6. What are your terms of payment?

    Contact Details
    B-Tohin Machine (Jiangsu) Co., Ltd.

    Contact Person: Ms. Jane Zhou

    Send your inquiry directly to us
    B-Tohin Machine (Jiangsu) Co., Ltd.
    Yong'an Road, Industrial Park for Environmental Science & Technology, Yixing City, Jiasngsu Province 214205, China
    Mobile Site Privacy Policy China Good Quality Three Lobe Roots Blower Supplier. © 2016 - 2021 All Rights Reserved.