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

Professional Manufacturer of Various Kinds of Blowers

Home ProductsThree Lobe Roots Blower

DN200 BKW9020S Water Cooled 80KPA Rotary Lobe Blower Cast Iron

DN200 BKW9020S Water Cooled 80KPA Rotary Lobe Blower Cast Iron

  • DN200 BKW9020S Water Cooled 80KPA Rotary Lobe Blower Cast Iron
  • DN200 BKW9020S Water Cooled 80KPA Rotary Lobe Blower Cast Iron
DN200 BKW9020S Water Cooled 80KPA Rotary Lobe Blower Cast Iron
Product Details:
Place of Origin: CHINA
Brand Name: B-TOHIN
Certification: ISO9001 / ISO14001
Model Number: BKW9020S
Payment & Shipping Terms:
Minimum Order Quantity: 1 set
Packaging Details: EXPORT WOODEN CASE
Delivery Time: 30 WORKING DAYS
Payment Terms: L/C, T/T
Supply Ability: 30 SETS PER MONTH
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Detailed Product Description
Name: Three Lobe Roots Blower Air Flow: 40.72m3/Min-73.32m3/Min
Package: Wooden Case Cooling Type: Water
Blower RPM: 1000-1500 Voltage: 380V/400V/415V/440V/Customed
Frequency: 50HZ/60HZ Application: Waste Water Treatment
Installation Type:: Horizontal Or Vertical
High Light:

three rotary lobe blower


80kpa rotary lobe blower


roots three lobe blower


About BKW9020S
BKW9020S 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.


Discharge differential pressure 60-100KPA
Air capacity 40.72m3/Min-73.32m3/Min
Rotary speed 1000rpm-1500rpm
Motor type 75KW-160KW
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.



Model Port Dia (MM) Speed Inlet airflow (m3/min)and shaft power(KW)(m3/min)
0.6kgf/cm2 0.7kgf/cm2 0.8kgf/cm2 0.9kgf/cm2 1.0kgf/cm2 Cooling
6000mmH2O 7000mmH2O 8000mmH2O 9000mmH2O 10000mmH2O
0.06Mpa 0.07Mpa 0.08Mpa 0.09Mpa 0.1Mpa
rpm m3/min KW m3/min KW m3/min KW m3/min KW m3/min KW L/min
BKW9020S 200 (8") 1000 44.70 59.00 43.60 65.83 42.58 72.66 41.62 79.49 40.72 86.33 15
1050 47.61 61.95 46.52 69.12 45.50 76.29 44.54 83.47 43.64 90.64
1150 53.50 66.49 52.57 74.19 51.71 81.89 50.90 89.59 50.13 97.29
1250 59.17 72.27 58.24 80.64 57.37 89.01 56.56 97.38 55.79 105.75
1400 67.66 80.94 66.73 90.32 65.86 99.69 65.05 109.07 64.28 118.44
1500 73.32 86.72 72.39 96.77 71.52 106.81 70.71 116.86 69.94 126.90
1600 78.98 92.51 78.05 103.22 77.19 113.93 76.37 124.65 75.60 135.36


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: Iris Xu

Tel: +8615301523076

Send your inquiry directly to us
B-Tohin Machine (Jiangsu) Co., Ltd.
No.69 Xijiu Road, Industrial Park for Environmental SCI & TECH, Yixing, Jiangsu,China
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