The YFPIM fan shall adopt aluminum axial fan and shall be direct drive type. At the inlet and outlet, there shall be fitted tube silencers connected with high strength bolts. To ensure safe fan operation, a steel safety guard shall be mounted at the inlet. The wheel shall undergo static and dynamic balancing tests and reach AMCA 204- G2.5 balancing level.
Quality steel sheets shall be used for the fan stack and rolled, continuously welded and spun. The fan stack and motor shall be all welded for great strength to support the dynamic load in operation.
A double-layer cylindrical structure shall be used. Sound absorptive cotton panels shall be placed between the outer layer of rolled and welded quality steel sheet and the inner layer of perforated sheets. The sound absorptive cotton panels shall be resistant to flames, insects and damp.
The housing shall be treated with electrostatic powder coatings. Greater than or equal to 70% of the finished gloss level shall be achieved. The surface shall be a level one so that no sags, cracks, cockles or detachment shall be found.
The motor shall match the fan load well and shall be IP54 rated with Class F insulation. Lubrication-free ball bearings shall be used. The leading wire shall be connected to the junction box for convenient wiring.
The nozzle shall be of tapered shape, high strength and low weight. It shall be formed by rolling and welding with aluminum alloys.
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