Air Blower Maintenance: Preventive Checklist & How to Extend Blower Service Life

Air blowers are low-pressure machines (typically ≤1 bar) supplying high flow rates, unlike high-pressure air compressors. In many plants, blowers run nearly continuously — especially in aeration tank aeration — so an unexpected shutdown causes cascading production losses and high remediation costs. Preventive maintenance replaces wear items (oil, filters, belts, gaskets) on a schedule, before they fail and cause damage to spread to bearings, rotors, or the gearbox.

A clogged inlet air filter increases differential pressure, forcing the machine to draw harder, generating heat and consuming more power for the same flow rate. Overdue lubrication oil loses its heat dissipation and anti-wear properties. These seemingly minor tasks therefore directly determine energy efficiency and equipment service life.

The maintenance schedule should be divided by frequency: quick daily checks, periodic cleaning, and replacement by operating hours. The hour milestones below are illustrative and must be adjusted according to the manufacturer’s recommendations for each model and actual environmental conditions (dust, humidity, temperature).

(*) Running-hour milestones vary by model and operating conditions — always follow the manufacturer’s technical documentation. Keeping a maintenance log (running hours, oil/filter change dates, vibration and temperature readings) helps predict failures and enables proactive spare parts planning.

Lubrication oil: the gearbox and bearings require the exact oil type specified by the manufacturer; using the wrong viscosity grade reduces lubrication effectiveness and heat dissipation. Inlet air filter: keeps dust out of the compression chamber; replace the filter element when differential pressure exceeds the threshold. Belt (belt-driven units): maintain correct tension and replace when worn or cracked to prevent slippage and flow rate loss. Gaskets, seals, relief valves/check valves: check for leaks and replace during major maintenance.

Using OEM spare parts of the correct specification maintains the design clearance between the two rotors (Roots) or the screw pair, which is the key factor determining compression efficiency. Incompatible spare parts can alter the clearance, increase air leakage, and waste power. TKT Pumps stocks more than 5,000 spare parts for common machine series, providing correct part numbers for each model.

The three common blower technologies differ in construction and maintenance requirements. Roots blowers (such as Aerzen’s Delta Blower series) use two counter-rotating lobe rotors; they are simple in construction and durable, with maintenance focused on oil, filters, and belts. Screw blowers (Delta Hybrid) compress internally in the chamber, achieving approximately 15% higher efficiency than Roots — saving more power — but the screw pair requires precise clearance monitoring and lubrication. Turbo (Aerzen Turbo) is a high-speed centrifugal machine for very high flow rates, with fewer mechanical wear parts but requiring close monitoring of the high-speed bearing system and control electronics.

For multi-blower systems, the control system also needs “maintenance” in terms of configuration. The AERsmart controller coordinates multiple blowers according to the dissolved oxygen (DO) demand of the aeration tank, AERtronic controls individual units, and the VFD adjusts speed to match load. Since aeration consumes a large share of total power, optimizing controls and carrying out timely maintenance is an effective way to save energy.