The centrifugal fan is mainly composed of fan unit, auxiliaries along with the control and monitoring system. Fan unit consist of a rotor part (impeller and the main shaft), static part (housing, inlet box, air inlet), damper and etc. And the auxiliaries includes motor, hydraulic coupling, actuator and etc.The centrifugal fans have various transmission methods, which are the motor direct connection (A type), the belt transmission (B, C, E type), the coupling transmission (D type) and the coupling transmission with inlet box (F type). Among these, the E type and F type can be designed as double suction fan types.

Installation Instructions
Upon arrival of the fan, check whether all parts are damaged or missing, and any defects and deviations should be reported to Dart-Rich
as soon as possible.1. For the fan parts delivered in bulk, some matching parts have been pre-assembled in Dart-Rich and marked before disassembly,
packaging and transportation, and must be installed on site according to the markings.2. It is necessary to drive the transmission part before installation after the installed ventilator of the whole machine arrives at the site,
check whether the rotating parts are rubbed or jammed, and check the coaxiality of the coupling between the fan and the motor. If there are any problems, it is necessary to adjust and correct them in time.
Our Advantages
1,With the advanced model series, and with the optimization of the impeller and other flow channel by CFD technology, the fan is of high efficiency, low noise and wide high efficiency range.2,Using CAE tools to verify the strength, stiffness, and rotor power of the product, ensuring smooth,safe and reliable operation of the fan.3,By optimization, the fan structure is reasonable and easy to install and maintain.4,By adopting various materials, and applying different technologies, we can provide fans used for many working conditions such as wear resistance, high temperature resistance, corrosion resistance and tight seal.

After Sales Service
1,We insist on "intelligent service" with the purpose of "more accurate, more comprehensive", and have 13 marketing service centres in China, as well as a sales and service network covering the whole world.2,All after-sales service personnel hold passports to respond to overseas maintenance tasks in a timely manner and provide you with 24-hour round-the-clock service during the execution of the project.3,"1191" Service Commitment: Feedback of on-site problems within 1 minute; Respond to the service demand within 1 hour; Reply solution within 9 hours; Personnel to the site within 1 day.4,After-sales service hotline: 0086-400-625-2668.

Q1. Are you a factory?
A1. Yes, Dart-Rich has production base in Nantong City Jiangsu Province and Yueyang City, Hunan Province, China.Q2. Where is your factory?
A2. Our Production base in Nantong City Jiangsu Province, and we have other factory in Hunan.Q3. How long is your warranty?
A3. We insist on providing customers with the best protection, the whole machine, 24 months warranty, 36 months warranty for the host.Q4. What certification do you have?
A4. At present, we have passed ISO 9001, ISO 14001, ISO 45001 and so on.Q5. What accessories do you use for your machine?
A5. Our spare parts and hosts only cooperate with big brands, we insist on winning customers with quality.Q6. How many years of history does your factory have?
A6. Our factory started in 1966, we insist on continuous innovation and research and development. In June 2019, the equity structure reform was carried out and the company became a partnership enterprise; to meet the needs of the company's rapid development, Dart-Rich (Hunan) Fan Co., Ltd. was established in December 2020.
Performance Range
Combined with the research results of famous universities such as Xi'an Jiaotong University, Tsinghua University and so on, and through the introduction, digestion, absorption, and innovation of international advanced technology,the product performance can cover all market needs. The products have more than 30 series, more than 800 models and more than 2800 specifications. The applicable flow rate range is 200~2800000 m³/h, and the pressure range is 550~30000Pa. The diameter of the impeller is 300-5000 mm, and the weight of the fan unit ranges from several tens of kilograms to several tens of tons.
Application Areas
Chemical industry: Fans for power station; induced draft fan for cracking furnace; regeneration fans; fans for various processes such as heating furnaces, reboilers, incinerators, ethylene cracking furnaces, sulfur recovery, drying, gasifiers, tail gas treatment, etc. in atmospheric and vacuum distillation, catalytic cracking, hydrocracking, delayed coking, catalytic reforming, ethylene cracking, aromatics, propane dehydrogenation, coal to oil, synthetic ammonia, coal to ethylene glycol, etc; as well as fans of special materials, high-sealing and explosion-proof fans, fans for carbon calcination, delivering and VOCs treatment system.