ECOAIR D40 compressor: restored while running instead of teardown repair

Oil temperature dropped, thermal overload protection stopped tripping, air charge-up got faster. ECOAIR D40 screw air compressor, PP «Dyvany-Mebli». 10 %, 25 %.

PP «Dyvany-Mebli» · measurements taken jointly: plant chief mechanic P. M. Rosiak and XADO LLC sales representative O. I. Bratasiuk

Lviv, Ukraine · treatment cycle 22.09–16.11.2009 · report 25.11.2009

PRODUCTXADO revitalizant gelcalculated dose added to the oil bath in stages

TREATED UNITECOAIR D40 rotary screw air compressoroil system · in service since 1994 · treated without disassembly

DOCUMENT TYPEPP «Dyvany-Mebli» report
signed and stamped

Key results

↑10%

compressor output, charge-up to 6.5-8 atm, 55 → 50 s

↓25%

oil temperature in the system, 80 → 60 °C

EQUIPMENT	IN SERVICE SINCE	WHAT WAS MEASURED
ECOAIR D40 rotary screw air compressor	1994 — 15 years by the start of treatment	Air charge-up time to 6.5-8 atm, oil temperature in the system, outlet air temperature

Measurements before treatment and after 300 hours of operation

PARAMETER	BEFORE	AFTER	CHANGE
Air charge-up time, 6.5-8 atm	55 s	50 s	output +10 %
Oil temperature in the system	80 °C	60 °C	−20 °C
Outlet air temperature, start of run	55 °C	54 °C	−1 °C
Outlet air temperature, end of run	60 °C	58 °C	−2 °C

The “before” and “after” measurements were taken in service by the plant chief mechanic together with the XADO LLC representative.

Report conclusion

The ECOAIR D40 compressor, fifteen years in service by the start of the treatment, was overheating: oil temperature in the system stayed at 80 °C, the electrical overload thermal protection tripped and shut the machine down. XADO revitalizant gel was added to the oil bath in stages, from 22.09 to 16.11.2009, with the compressor kept running throughout. After 300 hours of operation the oil temperature dropped to 60 °C, the thermal protection stopped tripping, noise and vibration decreased, and the time to charge air from 6.5 to 8 atm fell from 55 to 50 s. Conclusion of the report: “The results of applying XADO technology to restore the compressor in service allow it to be recommended for use instead of conventional restoration repair with replacement of parts”.

The results relate to the ECOAIR D40 rotary screw air compressor treated in service; on other equipment and under different conditions the figures may differ. The original PP «Dyvany-Mebli» report, signed and stamped, is published in full and available for download.

Current equivalent

Revitalizant gel for compressors and bearings →

Piston, screw and centrifugal compressors; rolling and sliding bearings running in an oil bath; machine-tool spindle units and slideways.

How such units are treated: Compressor

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