Product

DWT series low-noise roof ventilation I. Features 1. Various types and specifications, and wide application range: The following types of fans can be selected according to the different requirements of air volume, wind pressure and noise in the use occasions: A. Axial-flow roof ventilation: code-named DWT-I, with the characteristics of large air volume and lower pressure than centrifugal fans. At the same time, it can also be designed as reversible bidirectional rotation according to user requirements, which has the characteristics of equivalent positive and negative working conditions; B. Centrifugal roof ventilation: code-named DWT-II and DWT-III, which are suitable for occasions with small air volume and high pressure requirements; C roof ventilation without motor: code-named DWT-Ⅳ, suitable for steel roof, is the first choice for environmental protection fans in the new century. 2. High efficiency and low noise. This fan adopts advanced CAD series software and is developed by multi-objective optimization design. The 1200, 1400, 1500, 1600, 2000, 2200 and 2400mm fans in this series adopt the method of changing several quantities and wind pressure at different angles with the same diameter, so as to meet the needs of different working conditions, achieve the matching of fans and systems, and realize energy saving and noise reduction; 3. Lightweight, high strength and corrosion resistance: The impeller of the fan can be made of different materials according to the different corrosiveness of the working air medium, including ABS (engineering plastic), FRP (glass fiber reinforced plastic) and aluminum alloy plates. For centrifugal fans with high pressure requirements and high fan speed, the impeller surface is specially galvanized and sprayed with plastic for corrosion resistance, which not only reduces the weight of the whole machine but also has good corrosion resistance; 4. Smooth operation and long service life; The fan has small moment of inertia, high dynamic balance precision and stable operation. The factory internal control standard requirements of various performance indexes are higher than the fan industry standard, which can ensure the long-term stable operation of the fan. 5. Wide application: The fan can be made into explosion-proof and flame-retardant type according to the use requirements, which is suitable for anti-aging and pumping flammable, explosive and corrosive gases; 6. Beautiful appearance: the hood parts of this fan are made of glass fiber reinforced plastic, and the appearance is made of imported gel coat resin film, with soft transition, elegant appearance and strong practicability; It can also be made into steel hood according to user's requirements and treated with galvanized plastic spraying (PVC). 7. Service conditions: the temperature of the medium shall not exceed 60℃, and the gas shall not contain excessive viscous substances, and the dust content shall be less than 100mg/m.. For occasions with high medium temperature, our company has high temperature fan technology to provide products for use. 8. This product has passed the inspection by Zhejiang Product Technical Supervision Institute, and the inspection items include flame retardant, electrical conductivity, explosion-proof and wind resistance, etc., which are supervised by the Municipal Product Technical Supervision Bureau. 2. Description of model structure 1. The axial roof ventilator has a diameter of 300-2,400 mm, and there are 17 models. The centrifugal roof ventilator has nine models with a diameter of 300-1,000 mm.. Fans of other models can also be provided according to users' needs; 2. Refer to the general assembly drawing for the structure of various types of fans, which consists of impeller, air duct, hood, transmission parts, loose-leaf damper, bird net, safety net and other parts; (The above configuration is made according to user's requirements) 3. Fan transmission form: DWT-1 fan with a diameter of ≤ 2,200mm is driven by direct motor, and fans with a diameter of > 2,200mm are driven by belt, or by reducer according to customer's requirements. There are three kinds of loose-leaf dampers: gravity type, electric type and manual type. 4. roof ventilator has a wide range of applications and a large number. According to the needs of applications, the structure is complicated. Our company can carry out research and development according to different technical requirements of users, and improve the external structure.