Broad Overview
We completed two service visits and found the ozone system shut down because the compressor was low on oil. After adding oil, the system ran normally and met performance standards. We performed full annual maintenance on the compressor and serviced several ozone components, fixing leaks and improving system controls. The oxygen concentrator is working well, but there are signs of oil getting into the oxygen line, which points to a failing compressor valve.
The most urgent next steps are replacing the failing compressor valve and repairing a damaged oxygen filter housing, along with additional valve and fitting repairs to prevent future issues.
Lagae Rd – Full Annual Maintenance – Internal Summary
Service visits: Dec 22–23, 2025 and Jan 12–13, 2026.
Application Background: The Lagae site is a lift station application. Ozone is used to control odors and to pre-treat wastewater before it reaches the main wastewater treatment plant (WWTP). This helps reduce odor issues and allows the WWTP to operate more efficiently.
Condition on Arrival
System was not running. Compressor had shut down ~4 days prior, and there was no oil visible in the compressor sight glass on arrival. After adding ~3 quarts of oil, the system ran well and within spec.
Repairs & PM Work Completed
Air compressor (18,642 hrs)
Annual PM was completed:
- Belt, oil filter, separator, oil change, intake filter, both air line filters, cabinet filter.
- Inlet valve OK, thermal valve OK, blowdown OK, pilot valve rebuilt, HATS tested OK.
- Minimum pressure check valve (MPCV) was rebuilt but is in poor condition and needs replacement; compressor has trouble restarting under pressure due to MPCV failure.
- Air dryer and tank drain valves were inspected and appear recently replaced / OK.
Oxygen concentrator (19,978 hrs)
- Inlet filters replaced (clean, but trace oil present).
- Feed valves + EQ valves rebuilt; waste valves inspected but not rebuilt due to parts unavailable.
- Performance tested and the unit performs to full spec.
Ozone generator cabinet / controls
- Rebuilt O₂-in solenoid valve, inspected O₂ regulator OK, replaced O₂ filter (clean).
- Rebuilt leaky O₃-out flowmeter “A”, repaired ozone leak at ozone generator cell fitting, verified ozone leak sensor response OK.
- Telemetry verified OK.
- Program updated to improve shutdown purge and add air compressor auto-restart.
Status Summary / Conclusions
- Compressor shutdown event is consistent with loss-of-oil condition.
- Trace oil at O₂ concentrator inlet filters suggests oil carryover upstream, even though O₂ product filter remains clean (MPCV replacement needed).
- Ozone leaks found were mechanical connection-related and were corrected during visits.
- Annual PM items are complete and system is currently running to full spec.
Remaining Work (Next Visit)
- Rebuild O₂ concentrator waste valves.
- URGENT: Replace compressor MPCV.
- Rebuild O₃-out MBVs (needs Kynar fittings + FEP tubing) and replace all Kynar fittings on ozone line.
- URGENT: Repair/replace Wilkerson housing on O₂ filter (bottom fitting broken).
- Label O₂ concentrator: “LEAVE SET TO HAND AT ALL TIMES.”
Recommendation going forward
Main outage cause was low compressor oil level → recommend checking oil weekly (monthly if rarely adding).
For service and repair needs, contact us today! Our skilled team is willing to provide excellent service and custom recommendations for your applications.
