
DN250 Three Lobe Roots Blower, 15-132KW, 80KPA air cooling rotary blower
BK blowers have improved full-adiabatic efficiency as well as volumetric efficiency and provide superior air
capacity vs.pressure characteristics.
Model | BK9020 |
Air capacity | 26.99-81.37m3/min |
Discharge differential pressure | 10-80KPA |
Rotary speed | 700-1500rpm |
Motor type | 15KW-132KW 380/400/415/440V, 3PHASES, 50/60HZ, frequency motor also available |
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 |
Color | Customized, standard of RAL6011 |
N.W. of blower without motor | 1310 kg |
Packing size Approx. | 2.62*1.78*2.45m (length*width*height) |
Features:
1.BK three-lobe blowers needn't water coolant within 80kpa rising pressure.
2. The helical gears are adopted for much more stable conveying.
3. By adoption of an special profile of rotor,the clearance between the rotors can be held to be constant,
which makes the efficiency even higher.
4. The precision of rotors is controlled by mass production on precise NC machines.In addition,
the rotors are almost free of vibrations since they are dynamically balanced in the fabrication stage
already.
5. The helical timing gears are adopted not only to extend the use life but also to make noise lower.
Parameter sheet
Model | Port Dia (MM) | Speed | Inlet capacity (m3/min)and shaft power (KW) | |||||||
0.1kgf/cm2 | 0.2kgf/cm2 | 0.3kgf/cm2 | 0.4kgf/cm2 | |||||||
1000mmH2O | 2000mmH2O | 3000mmH2O | 4000mmH2O | |||||||
0.01Mpa | 0.02Mpa | 0.03Mpa | 0.04Mpa | |||||||
rpm | m3/min | KW | m3/min | KW | m3/min | KW | m3/min | KW | ||
BK9020 | 250(10") | 700 | 35.04 | 12.11 | 32.72 | 18.99 | 30.93 | 25.36 | 29.48 | 29.05 |
850 | 43.73 | 14.71 | 41.41 | 23.06 | 39.61 | 30.80 | 38.17 | 35.28 | ||
1000 | 52.41 | 17.30 | 50.10 | 27.12 | 48.30 | 36.23 | 46.85 | 41.50 | ||
1150 | 61.10 | 19.90 | 58.78 | 31.19 | 56.99 | 41.67 | 55.54 | 47.73 | ||
1250 | 66.89 | 21.63 | 64.58 | 33.90 | 62.78 | 45.29 | 61.33 | 51.88 | ||
1400 | 75.58 | 24.22 | 73.26 | 37.97 | 71.47 | 50.73 | 70.02 | 58.10 | ||
1500 | 81.37 | 25.95 | 79.05 | 40.69 | 77.26 | 54.35 | 75.81 | 62.25 |
Model | Port Dia (MM) | Speed | Inlet capacity (m3/min)and shaft power (KW) | |||||||
0.5kgf/cm2 | 0.6kgf/cm2 | 0.7kgf/cm2 | 0.8kgf/cm2 | |||||||
5000mmH2O | 6000mmH2O | 7000mmH2O | 8000mmH2O | |||||||
0.05Mpa | 0.06Mpa | 0.07Mpa | 0.08Mpa | |||||||
rpm | m3/min | KW | m3/min | KW | m3/min | KW | m3/min | KW | ||
BK9020 | 250(10") | 700 | 28.15 | 35.91 | 26.99 | 42.76 | ||||
850 | 36.83 | 43.60 | 35.68 | 51.93 | ||||||
1000 | 45.52 | 51.30 | 44.36 | 61.09 | 43.26 | 70.89 | 42.28 | 80.68 | ||
1150 | 54.21 | 58.99 | 53.05 | 70.26 | 51.95 | 81.52 | 50.97 | 92.79 | ||
1250 | 60.00 | 64.12 | 58.84 | 76.37 | 57.74 | 88.61 | 56.76 | 100.86 | ||
1400 | 68.69 | 71.81 | 67.53 | 85.53 | 66.43 | 99.24 | 65.44 | 112.96 | ||
1500 | 74.48 | 76.94 | 73.32 | 91.64 | 72.22 | 106.33 | 71.24 | 121.03 |
Structure of blower main body
No. | Part Name | Qty. | No. | Part Name | Qty. | No. | Part Name | Qty. | ||
1 | Footing | 2 | 9 | Left end cover | 1 | 17 | Oil tank | 1 | ||
2 | Hexagon bolt | 4 | 10 | Round pin | 4 | 18 | Gear | 2 | ||
3 | Antidust seal | 1 | 11 | Casing | 1 | 19 | Key | 2 | ||
4 | Drive impeller | 1 | 12 | Oil seal | 4 | 20 | Axial sleeve | 2 | ||
5 | Bearing | 2 | 13 | Right end cover | 1 | 21 | Bearing | 2 | ||
6 | Driven impeller | 2 | 14 | Bolt | 16 | 22 | Bearing plate | 2 | ||
7 | Dust cup | 1 | 15 | Breather | 1 | 23 | Adjustable pad | several | ||
8 | Grease nipple | 2 | 16 | Bolt | 8 | 24 | Magnetic nut | 1 |
Assembling drawing of blower package
Standard supply of scope
1. bare shaft blower
2. pressure relieve valve
3. wafer check valve (slim type)
4. inlet silencer(with air filter)
5. outlet silencer
6. public base (with belt cover)
7. rubber flexible joint and shock pad
8. motor pulley
9. pressure meter
10. V-belt
11. bolts and nuts and other connection parts
12. electric motor
B-Tohin Machine (Jiangsu) Co., Ltd.
B-Tohin Machine (Jiangsu) Co., Ltd. is a foreign invested enterprise established in 1994. It is located at Yixing Industrial Park for Environmental Science & Technology, one of State High-Technology Development Zones. With total registered capital of RMB 120 million and total investment of RMB 160 million B-Tohin is engaged in production and sales of HC blower, BK and YU Roots blowers,air compressor blower,screw blower, anti-corrosion and anti-explosion stainless steel Roots blowers, gear speed-up centrifugal blower, multi-stage centrifugal blowers and in the sales of other supporting products for water treatment in environmental protection, such as water pump (YU, WQ submersible pump, YYOW split case pump), mixer, dewatering machine, etc. By the purchase of a new building of 26000 m2 area in Yixing Economic Development Zone in 2015, the expansion of production scale is supported.
B-Tohin’s products have been widely used in various industries, including water treatment, construction material and cement manufacture, chemical industry, electricity, petroleum, steel, metallurgy, mine, food convey lines, etc., enjoying a good reputation among customers both in the overseas and domestic market.
In the company’s Research and Development Center, a technical innovation team composed of professor level Senior Engineers, Doctors, Masters and many undergraduates, is aiming at the service for environmental protection by tracing and developing the products of high level.
B-Tohin has made great investment in introducing CNC, full-automatic digital control lathes, CMM and other advanced equipment to ensure good quality. A complete set of advanced horizontal OKUMA CNC was introduced specially for the fine finish machining of blower cylinders and end-covers; a NC machine was imported for the processing of blower parts; a Taiwan Dahlih-made CNC was equipped for machining the parts of middle and large size blowers; and several back-forth curve machining planers were introduced for solving the problem of shapers’ precision problem. This kind of planer ranks among the advanced level in China which is specially designed for curve machining of blower rotors. In the beginning of 2015, we cooperated with Testing Laboratory of Shenyang Blower Research Institute (Quality Supervision & Inspection Center for Blowers of China Machinery Industry), and a whole set of blower performance test system was designed for us according to the Roots Blower Industry Standard by the Laboratory.
Passed the certification of ISO9001 & ISO 14001:2400, the company has been nominated as “High & New-tech Enterprises of Jiangsu Province” and “Pneumatic Technology Research Center of Jiangsu Province”. In successive seven years, B-Tohin has been honored as “Favorite Brand of Users in Water Treatment Industry” and “Main Enterprise in Chinese Roots Blower Industry” in 2014, it has been awarded the title of “2014 Top 10 Brands in Chinese Water Industry” on website.
Being a member of National Commission for Pneumatic Conveying and National Technical Committee of Standardization of Blower, and one of the sponsors of National Union of Environmental Protection Equipment Brands, B-Tohin Machine has been an excellent and famous enterprise in environmental protection blower industry.
B-Tohin’s tenet of “Eternal pursuit of improving, eternal promise of satisfying customers” and spirit of “Together with Heat” are always kept in every employee’s mind and in every step of company management. All the honors belong to the past only, people of B-Tohin will make every endeavor to design and manufacture more perfect products for contributing more to the related industries both at home and abroad and to our domestic machinery industry.