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

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DN250 BKW9020 Water Cooled Three Lobe Roots Blower

DN250 BKW9020 Water Cooled Three Lobe Roots Blower

    • DN250 BKW9020 Water Cooled Three Lobe Roots Blower
    • DN250 BKW9020 Water Cooled Three Lobe Roots Blower
  • DN250 BKW9020 Water Cooled Three Lobe Roots Blower

    Product Details:

    Place of Origin: CHINA
    Brand Name: B-TOHIN
    Certification: ISO9001 / ISO14001/CE
    Model Number: BKW9020

    Payment & Shipping Terms:

    Minimum Order Quantity: 1 set
    Price: USD 10600- USD16600
    Packaging Details: EXPORT WOODEN CASE
    Delivery Time: 50 WORK DAYS
    Payment Terms: L/C, T/T
    Supply Ability: 30 SETS PER MONTH
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    Detailed Product Description
    Name: BKW9020 Pressure: 10-80Kpa
    Air Flow: 25.89m3/Min-73.32m3/Min Package: Wooden Case
    Motor Power: 37kw-280kw Cooling Type: Water1
    High Light:

    3 Lobe Roots Blower


    80Kpa roots lobe blower


    280kw roots lobe blower


    About BKW9020
    BKW9020 Roots Blower inherits most components from BK9020, it adopts water cooling in bearing cover, which can reduce the temperature of bearing when working and prolong the longevity, it's bore size is DN250, which can generate larger capacity suitable for cement factory and power plant use.


    Model BKW9020
    Air capacity 25.89m3/Min-73.32m3/Min
    Discharge differential pressure 60-100KPA
    Rotary speed 700rpm-1500rpm
    Motor type 37KW-280KW
    380/400/415/440V, 3PHASES, 50/60HZ
    Motor brand Standard: Siemens Beide or Wannan motor
    Siemens and ABB motor for your option
    Installation type Standard: horizontal type.
    Vertical type available for your option
    N.W. of blower without motor 1310 kg
    Packing size Approx. 2.62*1.78*2.60m (length*width*height)
    Features 1. Helical type timing gears for smooth operation
    2. Compact, flexibility in installation gives users more choices.
    3. Integral structure of impeller and shaft for more stable and smooth operation
    4. Adopt imported oil seals made from fluoric rubber with great wear resistance and high-temperature resistance.
    5. Low noise, low vibration and energy consumption.


    Type Port Dia Speed Inlet airflow(m3/min)and shaft power(KW)at different conditions Cooling Water
    60kpa 70kpa 80kpa 90kpa 100kpa
    rpm m3/min KW m3/min KW m3/min KW m3/min KW m3/min KW L/min
    BKW9020 250(10'') 700 26.99 42.76 25.89 49.62             20
    850 35.68 51.93 34.58 60.26            
    1000 44.36 61.09 43.26 70.89 42.28 80.68 41.35 90.48 40.42 100.28
    1150 53.05 70.26 51.95 81.52 50.97 92.79 50.04 104.05 49.11 115.32
    1250 58.84 76.37 57.74 88.61 56.76 100.86 55.83 113.10 54.90 125.35
    1400 67.53 85.53 66.43 99.24 65.44 112.96 64.52 126.67 63.59 140.39
    1500 73.32 91.64 72.22 106.33 71.24 121.03 70.31 135.72 69.38 150.42

    Description of blower parts:

    Casing Made of Casting iron HT200
    ENDLESS structure adopted for improving efficiency, one-time machined by CNC center with high precision
    Rotor (Shaft and impeller) Made of Casting iron QT500
    The impeller and shaft is cast as an integral part.
    Adopting NC planer for machining to achieve high precision
    Gear end bearing Made of GCr15
    NSK brand, double-row angular contact ball bearing, capable of supporting axial load
    Drive end bearing Made of GCr15
    NSK brand, cylindrical roller bearing
    Gear Made of 20CrMnTi
    Bevel structure for more smoothly running
    Oil seal Made of fluoro rubber
    bears high temperature and has a longer life.

    Working Principle

    Roots blower is a cubage blower, and it discharges a fixed amount of air in proportion to its rotation speed. Every rotation, there is two lobes to finish three times absorbing and dischargeing air. Compared with two lobes blower, it is of less air pulses, smaller load change, higher strength, lower noise and vibration.

    Two paraller shafts have three lobes each, all the lobes keep small clearance with each other and housing inside. Every lobes rotatiomn, a certain air will be absorbed at inlet and transfeered form the housing inside surface to blower's diacharge port.

    Two shafts will be turned by the timing gears, no any touching between lobes, so it can be turned at high speed without any lubrication inside. It has the following chaaracteristics: simply configuration; running smoothly;good performance stabilization. It has been widely applied in various industries.


    Cooling Water:


    Clean water without foreign materials is required.

    Water temperature shall be less than 40 ℃.


    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
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