FRP Fiberglass Centrifugal Fan

Not only standard centrifugal fans but also premium SS316L fans wear out prematurely in the most chemically aggressive process environments, like acid pickling lines, chlor-alkali production, HF exhaust systems and semiconductor fume extraction. The reason is not a lack of quality in the fan, the actual reason is that there are certain chemicals that no metal fan can withstand in the long term. Hydrofluoric acid initiates stress corrosion cracking at the grain boundaries of the SS316L impeller and wet chlorine gas slowly destroys the protective layer of stainless steel that prevents rust. One of the greatest fears of metal fans is that the damage is not visible in an HCl environment. The acid damages silently in the weld area and the cracks grow with each rotation. Finally, the day it breaks, the entire production line is shut down.

The FRP Fiberglass Centrifugal Fan fundamentally solves those problems by completely removing metal components from the airflow path. FRP (Fiberglass Reinforced Plastic) is rustproof. Because rust requires a metal surfaces and there is no metal in any part exposed to air. The impeller, housing, inlet cone and all air-contacting parts are made of glass fiber-reinforced thermoset polymer. Furthermore, the resin that will be used is determined by the chemical environment. The chemical environment of each factory is different, so the materials should be different. Polyester resin is sufficient for general acid work. If there are oxidizing acids or chlorine compounds, choose vinyl ester resin, which is reliable up to 100°C. Where HF, concentrated HCl or strong alkalis are present, PP-FRP hybrid is the only right solution, where the chemical resistance of polypropylene and the strength of FRP are combined in a single structure. There is no coating or covering, so there is no question about damaging the coating. Woven into this corrosion-resistant composite material, it never corrodes.

A Fiberglass Reinforced Polymer (FRP) Centrifugal Fan provides airflow of 500 to 80,000 m³/h and a maximum static pressure of 5,000 Pa. The motor is mounted externally, the shaft is installed outside of the airflow path and all hardware is stainless steel (SS316L). It is inherently spark-resistant due to its non-metallic construction. This unit is also usable even when flammable vapors and chemical environments coexist. Structural loads, installation complexity and bearing stress are all reduced because this unit is up to 75% lighter than equivalent steel fans. Standard resins work up to 100°C and high-temperature resin formulations work up to 130°C. This fan will last for more than 10 to 15 years with proper chemical service.