Product Quality Commitment and Guarantee

Our company’s fans fully meet your requirements for various parameters such as air volume and air pressure, and have a service life of over 25 years. The following are our product quality assurance measures:

From the entry of raw materials into the factory to the shipment of finished products, all processes are rigorously inspected in accordance with the international ISO 9001 quality system standards. The production, inspection, testing, and acceptance of each process are jointly carried out by the Production Department, the Quality Inspection Department, and the Technical Department, with detailed records kept and filed. We provide full-process tracking, quality management, and service for every customer’s product. For example, the design and manufacture of fans comply with GB/T 3235 “Basic Types, Dimensions, Parameters, and Performance Curves of Fans” and GB/T 3235 “Basic Types, Dimensions, and Parameters of Fans.” Purchased motors must meet the technical requirements specified in GB/T 73561. Product outgoing tests are conducted according to the GB/T 1235—2000 standard, covering pipeline network processing, measurement point layout, initial data acquisition, data calculation, and result reporting. Steel materials must be accompanied by a quality certification report provided by the manufacturer, and we also commission nationally accredited and qualified inspection agencies to verify the material composition; only materials that meet the required standards can be used. For matched motors, the motor manufacturer must provide a performance and mechanical test report as well as a no-load test report. We also provide users with inspection reports confirming the absence of defects in the fan blades. Fan impellers undergo two-sided dynamic balancing in accordance with GB/T 49101 “Balancing of Fan Rotors,” and the outgoing dynamic balancing grade must reach G5.6 or higher, exceeding the national standard requirements. Upon shipment, we provide users with an impeller dynamic balancing test report. The exterior surface of the fan is painted according to the technical requirements specified in JB/T 6886 “Technical Conditions for Fan Painting.” Fan nameplates are manufactured in compliance with the requirements of GB/T 13306 “Nameplates.”

Main features of the fan

1. Impeller arrangement: A direct-drive structure is adopted, in which the impeller is fixed to the hub via a key connection through the shaft.

2. The complete set of fan components includes a variable-diameter connecting duct, a flow collector, an electrically operated manual butterfly valve (including electric heating), a connecting duct, a primary-stage main unit, a secondary-stage main unit, a frequency-conversion motor with a bypass, a diffuser, a round-to-square transition piece, a silencer, a diffusion tower, a braking device, and support rollers, among others.

3. The fan is equipped with a combined manual and automatic braking device that can achieve normal startup and reverse airflow within 5 minutes, with the reverse airflow rate exceeding 60% of the forward airflow rate.

4. During fan design, we optimize the selection based on the parameters provided by the user and carry out personalized design to ensure that the fan operates with high efficiency both in the initial and later stages.

5. The fan casing is welded from Q235 steel plates. At the factory, it is coated with two layers of epoxy zinc-rich primer and one layer of epoxy zinc topcoat. All bolts are galvanized. 6. The silencer perforated plates are made of galvanized steel, which effectively extends their service life and reduces subsequent replacement costs.

7. The host casing and the rotating parts of the impeller are equipped with protective rings. The protective cylinder is securely fastened to the copper ring using an explosive welding composite process, ensuring it remains firmly in place, safe, and reliable.

8. Differences in blade fixing methods:

The blades made of cast aluminum alloy are secured using a tapered clamp mechanism. Although the machining process is complex, the fixation is reliable and the operation is simple.

Improvement Measures and the Application of New Technologies

1. In the design of conventional motors, the cooling fan’s heat dissipation capacity (ventilation cross-section) is calculated based on natural conditions. However, when a fan motor is installed inside a forced-flow chamber, its ventilation conditions are significantly restricted. To address this issue of poor ventilation, our company has taken two key measures: First, we have increased the length of the flow guide vanes (to prevent the airflow from abruptly changing direction and ensure smooth exhaust flow, maximizing the effective flow area); second, we have independently designed dedicated heat-dissipation channels for the motor (leveraging our company’s own design expertise and strengths). These channels allow airflow to enter through the intake port and smoothly discharge the heated air from the motor through the exhaust port.

⒉ The use of a streamlined diffusion tower has resulted in a noticeable reduction in fan outlet noise and an efficiency improvement of 2-4%.

Shanxi Jin Yun’an Fan Co., Ltd. (formerly Shanxi Yun’an Fan Manufacturing Co., Ltd.) is located in the Yuncheng Economic and Technological Development Zone. The company was established in 2013 with a registered capital of 50 million yuan and covers an area of 46,000 square meters. Its fixed assets exceed 36 million yuan. Currently, the company employs over 120 people, including 20 engineering and technical personnel. It has long-term collaborative relationships with research institutions such as Northwestern Polytechnical University, Taiyuan University of Technology, and China University of Mining and Technology, engaging in technological R&D. The company also recruits experts and professors as R&D consultants to stay abreast of industry development trends and continuously strengthen its technological innovation. The company is equipped with complete production and testing facilities, featuring more than 180 advanced processing and manufacturing devices, including laser cutting machines, automatic welding equipment, CNC bending machines, shearing machines, plate rolling machines, CNC lathes, dynamic balancing machines, and fan performance testing stations. It is a specialized fan manufacturer integrating R&D, production, sales, and after-sales service.

The company’s core business focuses on the design, R&D, and manufacturing of various ventilation fans and their complementary products for mines, non-coal mines, rail transit systems, and other applications. Its product portfolio includes 38 fan series—such as the FB(D) series, FBC(D)Z series, FKZ series, rail transit SDS series, and tunnel SDF series—comprising more than 3,000 specifications. Complementary products include self-resetting explosion-proof doors for vertical and inclined shafts, louver-type automatic regulating dampers, side-opening (vertical) automatic regulating dampers, butterfly valves, silencers, online monitoring and fault diagnosis systems for main ventilation fans, wind-reversing systems that operate without stopping airflow, and intelligent lubrication systems. These products comprehensively meet the ventilation needs of mines and are exported to diverse domestic sectors as well as international markets including South Africa, Russia, and Southeast Asia.

In recent years, the company has successively been awarded honors such as “Yuncheng Enterprise Technology Center,” “Outstanding Enterprise of Yuncheng,” “Demonstration Enterprise for Intellectual Property in Yuncheng,” and “Innovative Small and Medium-sized Enterprise.” The company has obtained certifications including “ISO9001 Quality Management System Certification,” “ISO14001 Environmental Management System Certification,” and “ISO45001 Occupational Health and Safety Management System Certification.” Its products have also passed the “China National Compulsory Product Certification,” and the company holds numerous patents. Relying on advanced process equipment, strong technical capabilities, excellent product quality, and a comprehensive service system, the company has earned unanimous recognition and high praise from a wide range of customers. In particular, in recent years, the company has focused on launching environmentally friendly, low-noise fans into the market, achieving rapid growth and becoming a well-known enterprise that leads the industry in fan technology.

Where there’s sincerity, even metal and stone can be moved. Adhering to the principle of “people-oriented, technology-driven enterprise development” and the belief that “innovation paves the way to the future,” Jin Yun’an Company, backed by its robust technological capabilities, advanced CNC precision machining equipment, an outstanding team of talented professionals, and cutting-edge management practices, remains committed—as always—to providing users with high-quality mining ventilation equipment and making greater contributions to the safe production and sustainable development of China’s mining industry.