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 receipt of raw materials to the shipment of finished products, all processes are rigorously inspected in accordance with the ISO9001 international quality system standards. The production, inspection, testing, and acceptance of each process are jointly carried out by the Production Department, Quality Inspection Department, and Technical Department, with detailed records kept and filed. We provide end-to-end 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 3836.1. Product outgoing tests are conducted according to the GB/T 1236—2000 standard, covering pipeline network processing, measurement point layout, raw data collection, data calculation, and result output. Steel materials must be accompanied by material certification reports provided by the manufacturer, and we also commission nationally recognized, qualified inspection agencies to conduct material inspections. Only materials that meet the required standards can be used. For matched motors, the motor manufacturer must provide performance test reports and no-load test reports. We provide customers with non-destructive testing reports for fan blades. Fan impellers undergo two-sided dynamic balancing tests in accordance with GB/T 9101 “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 customers with dynamic balancing test reports for the impellers. The exterior painting of fans is performed 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 unit of the fan includes a variable-diameter connecting duct, a flow collector, an electric/manual butterfly valve (including electric heating), a connecting duct, a primary-stage main unit, a secondary-stage main unit, an explosion-proof frequency converter motor, a diffuser, a round-to-square transition piece, a silencer, a diffusion tower and braking device, support rollers, and other components.

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 at high efficiency both in the initial and later stages.

5. The fan casing is fabricated by welding Q235 steel plates. At the factory, it is primed twice with epoxy zinc-rich primer and coated once with epoxy zinc topcoat. All bolts are galvanized.

6. The silencer perforated plates are all made of galvanized steel, effectively extending their service life and reducing 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 conical clamping method. Although the machining process is complex, the fixation is reliable and the operation is simple.

Improvement Measures and 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 ventilation conditions. However, in fan motors installed within isolation chambers, ventilation conditions are severely restricted. To address the issue of poor ventilation, our company has taken two key measures: First, we have increased the length of the isolation chamber (so that the airflow does not abruptly turn 90 degrees and can flow smoothly without significant turbulence); and we have also expanded the ventilation cross-section of the fresh-air duct (typically to more than twice the motor’s cross-sectional area). Second, we have independently designed the motor’s cooling air passages—leveraging our company’s own design expertise and strengths—to ensure that airflow enters through the intake port and smoothly carries away the heated air from the motor via the exhaust port.

2. By adopting a streamlined diffusion tower, the noise at the fan outlet has been reduced to some extent, and the efficiency has improved by 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. Established in 2013, the company has a registered capital of 50 million yuan and covers an area of 46,000 square meters. Its fixed assets exceed 36 million yuan, and it currently employs over 120 people, including 20 engineering and technical personnel. The company maintains 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. It 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 types of ventilators and their complementary products for mines, non-coal mines, rail transit systems, and other applications. Its product portfolio includes 38 series of ventilators—such as the FB(D) series, FBC(D)Z series, FKZ series, rail transit SDS series, and tunnel SDF series—comprising over 3,000 different 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 ventilators, wind-reversing systems that allow continuous operation 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 City,” “Demonstration Enterprise for Intellectual Property in Yuncheng City,” 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 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 to providing users with high-quality mining ventilation equipment and continues to make greater contributions to the safe production and sustainable development of China’s mining industry.