About Screw Blower

Main characteristics:

• The male and female rotors of oil-free screw blower are precisely designed. Compared with Roots blower, it can achieve internal compression in the cavity, with higher efficiency and 20% higher energy saving performance under the same energy consumption conditions.
• Stable airflow, less airflow fluctuation when pressure changes .
• Applicable to higher pressure, low noise.
• Available with PLC intelligent remote control and different communication methods, convenient for operation management.

The screw blower achieves internal compression during the air transportation in the cavity, so the screw blower has most of the advantages of traditional blowers, and at the same time has higher efficiency.

The process of air transportation and compression is continuous and progressive, so the airflow pulsation is lower, and the exhaust noise and temperature control are better than traditional blowers.

As a new type of rotary blower developed in recent years, screw blowers have begun to be applied in aeration, gas-water back-washing, oxidative de-sulfurization, fluidization/homogenization process, and pneumatic conveying due to their simple structure, stability, energy saving and low noise.

Composition

The screw blower is composed of blower enclosure, blower main body, motor, air filter, silencer, an oil pump tank and oil filter.

As the core component of the screw blower, the structure of the blower main body directly determines the blower’s performance. The main body is composed of casing, screw rotors, gear box, bearings, shaft seals, ect.



Working Principle

The operating principle of the screw blower is that two parallel female and male rotors mesh with each other in the "∞"-shaped cylinder to form a working volume. Through the synchronous gear, the rotor rotates at high speed in the opposite direction, and the working volume changes periodically as the rotor rotates, realizing air compression during air transportation. The working cycle of screw blower can be divided into three processes: suction, compression and exhaust. The cycle process is as follows:

1. Suction process
Picture ① : The air enters the volume between the teeth of the rotor through the suction port. As the rotor rotates, the volume between the teeth continuously expands.

Picture ② : When the volume between the teeth reaches the maximum, the volume between the teeth is disconnected from the suction port and the suction process ends.

2. Compression process
Picture ③: during compressing

3. Exhaust process
Picture ④: After the inter-tooth volume is connected to the exhaust port, the exhaust process begins. During the rotation of the rotor, the volume between the teeth continuously decreases, sending the compressed air to the exhaust pipe. This process continues until the volume reaches designed data.




Company Brief

B-Tohin Machine (Jiangsu) Co., Ltd., a foreign-funded enterprise established in 1994,is located in the Industrial Park for Environmental Science and Technology ,Yixing ,China. B-Tohin is mainly engage in the production and sales of roots blowers,rotary blowers,single-stage high-speed centrifugal

blowers,multi-stage centrifugal blowers,air foil bearing centrifugal blowers,magnetic suspension centrifugal blowers,FRP fans,vacuum pump sand water pumps,and in the sales of Japan ShinMaywa water pumps.The products are sold all over the country and exported to many countries and regions for

application in environmental water treatment building,materials and cement, chemical industry ,electric power,petroleum,steel,metallurgy,mining,printing and dyeing,grain transportation ,new energy ,new materials and other industries.Now the company has formed an annual production and sales scale of

more than 30000 sets of blowers and water pumps.

The company has passed the ISO9001 quality management system certification,ISO 1400 environmental management system certification ,ISO45001 occupational health and safety management system certification and the “five-star”certification of national standard GB/T27922-2011 “Commodity After-

sale Service Evaluation System” and it was named as “Specialized ,Refine, Characteristic and Innovative Enterprise of Jiangsu Provinces “,also was recognized as the “Enterprise in Compliance with the Standard Conditions for Environmental Protection Equipment Manufacturing Industry in 2002

(Announcement No.28 of the Ministry of Information Technology of the People’s Republic of China in 2001).

Main machine

FAQ

Q1. Are you manufacturer or trading company?
We are the professional machinery manufacturer.Now the company has formed an annual production and sales scale of more than 30000 sets of blowers and water pumps.

Q2: Where is your factory located? May I have a visit?
Warmly welcome! Our factory is located in the Industrial Park for Environmental Science and Technology , Yixing, China.

Q3: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.

Q4: What is your warranty?
Our warranty is 12 months after received the machine.

Q5. 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.

Q6.What is the delivery time?
Product delivery time is generally within 45 days from receipt of deposit.

Q7.Does your machine with CE certificate?
Yes.We have CE certificate,we will offer it if you need.

Q8. Do you accept customization?
We accept customization and we have a professional technical team to provide you with the best solution.