Industrial PP/FRP Fans & Blowers

Industrial PP/FRP Anti-Corrosion Fans & Blowers for Chemical Exhaust

PP (polypropylene) and FRP (fiberglass reinforced plastic) centrifugal fans move corrosive exhaust gases where standard steel fans fail within months. Impellers are dynamically balanced to ISO 1940 G6.3 for vibration-free operation. According to fan engineering standards, anti-corrosion fans in chemical service must be derated by 10-15% compared to standard air handlers to account for gas density variation and chemical attack on moving parts. XICHENG EP fans are designed with this margin built in.

Specification	Options
Type	Centrifugal (backward-curved), axial, VFD-driven
Material	PP, FRP, PP+FRP hybrid
Airflow	500-80,000 m3/h
Static Pressure	Up to 3,500 Pa (PP), up to 5,000 Pa (FRP)
Motor	IE3/IE4 premium efficiency, inverter-duty
Balance Grade	ISO 1940 G6.3

Centrifugal vs axial — which fan for corrosive exhaust?

Centrifugal (backward-curved) fans generate higher static pressure (1,000-3,500 Pa) — required for systems with scrubbers, long duct runs, or multiple hood branches. Axial fans deliver high airflow at low pressure (100-500 Pa) — suitable for short, straight exhaust runs without treatment equipment. For most scrubber-equipped exhaust systems, centrifugal fans are the correct choice. See our fan selection guide for detailed sizing methodology.

Frequently Asked Questions

How long do PP fan impellers last in acid service?

PP impellers typically last 8-12 years in continuous acid gas service, compared to 1-3 years for coated steel. FRP impellers last 5-7 years in similar conditions. The limiting factor is usually motor bearing life (3-5 years), not impeller corrosion.

Can PP fans handle solvent-laden exhaust?

PP fans are suitable for water-soluble solvents at concentrations below 25% LEL. For high-concentration flammable solvents, specify spark-resistant construction (AMCA A or B) with conductive FRP or SS316L.

What maintenance does a PP/FRP fan require?

Quarterly: check impeller balance, belt tension (if belt-driven), bearing temperature. Annually: inspect impeller for chemical attack, housing for cracks, motor insulation test. Balance re-check recommended every 2 years or after any impeller cleaning.