If your blower just quit on you, you've got two options: call the OEM and wait, or call Kelsey Machine and get it done right. We've been rebuilding industrial blowers of all types and sizes for over 40 years — from small Roots-type units in wastewater plants to large centrifugal blowers in petrochemical facilities. Every rebuild is backed by a written 24-month warranty, and our 24/7 emergency service means we're ready when you need us most.
KMS provides expert industrial blower repair and rebuild services for wastewater treatment facilities, petrochemical plants, food processing operations, pneumatic conveying systems, and industrial manufacturing. We work on all blower types and all manufacturers, with a structured repair process that gives you full transparency from intake to delivery.
Types of Equipment We Repair
Rotary Lobe (Roots-Type) Blowers
The most common positive displacement blower in industrial use — used in wastewater aeration, pneumatic conveying, and vacuum systems. KMS rebuilds lobe profiles, timing gears, bearings, seals, and housing bores. Lobe-to-housing clearance is critical and must be restored to OEM spec.
Centrifugal Blowers
High-flow, lower-pressure blowers used in HVAC, industrial ventilation, and process air systems. KMS rebuilds impellers, replaces bearings and seals, and restores housing geometry. Impeller balance is critical — we dynamically balance every impeller.
Radial Blowers
Used in high-pressure applications including combustion air, dust collection, and industrial drying. KMS repairs and rebuilds radial blowers of all sizes, with particular attention to impeller condition and housing wear patterns.
Axial Flow Blowers
High-volume, lower-pressure blowers used in cooling towers, ventilation, and process air. Blade condition, hub integrity, and bearing condition are the primary inspection points.
Regenerative Blowers
Used in aeration, vacuum, and low-pressure conveying applications. Regenerative blowers are sensitive to contamination and wear in the regenerative channel. We inspect, clean, and rebuild these units.
Screw Blowers
Oil-free screw blowers are increasingly common in wastewater and process air applications. KMS repairs screw blower rotors, timing gears, bearings, and seals — restoring rotor-to-housing clearances.
Common Failure Modes We See
Lobe Wear & Clearance Loss
Rotary lobe blowers depend on precise lobe-to-housing and lobe-to-lobe clearances. As these open up, efficiency drops and internal slip increases. We measure and restore clearances to OEM spec.
Bearing Failure
Blower bearings carry significant loads at high speeds. Contamination, overloading, and improper lubrication are the leading causes.
Timing Gear Wear
Rotary lobe blowers use precision timing gears to synchronize the lobes. Worn timing gears cause lobe contact — a catastrophic failure. Catch it early.
Seal Failure & Oil Contamination
Oil seals prevent lubrication oil from entering the air stream. Seal failure contaminates the process and indicates the unit needs immediate attention.
Impeller Damage & Imbalance
Centrifugal and radial blower impellers are subject to erosion, corrosion, and impact damage. An imbalanced impeller destroys bearings and causes vibration.
Housing Wear & Damage
Blower housings wear from abrasive particles in the air stream and from lobe/impeller contact. We restore housing bores to OEM tolerances.
Our Repair Process
- 01
Complete Disassembly & Inspection
Every blower is fully disassembled, cleaned, and inspected. We document lobe clearances, bearing fits, timing gear condition, and housing wear.
- 02
Failure Analysis
Written root cause analysis. A contamination failure requires different remediation than an overloading failure.
- 03
Precision Machining
Housing bore restoration, shaft repair, and bearing housing reconditioning all done in-house.
- 04
Dynamic Balancing
Every rotating impeller is dynamically balanced before reassembly. Imbalance kills bearings.
- 05
Reassembly & Clearance Setup
Reassembled to OEM tolerances with documented lobe-to-housing and lobe-to-lobe clearances.
- 06
Test & Warranty
Operational test, documentation package, and our written 24-month warranty.