... -corrosion, anti-swing, vibration resistance. CZ & CZF Series Blower Fan Introduction:UGTM CZ & CZF Series Marine Axial Fans are new ... balanced in order to ensure reliability and smooth operation.The fan casing is welded construction and made of mild steel ... A - Kwhere, C = marine or navyZ = axial ventilatorF = fan 80 = impeller inter-diameter of 80 cmA = impeller code (the higher character the higher ...