EK4B-M compressor: cylinders restored, faster charging, lower current

Cylinder geometry was restored, current draw fell, the reservoir charged faster. EK4B-M compressor no. 16484, Fili electric depot, Moscow Metro. Russia · 2000.

Fili electric depot of the Moscow Metro · approved by depot head V. A. Bersenev · endorsed by R&D company “Problems of Friction and Wear”

Moscow, Russia · acceptance by the customer's commission: chief mechanic, head of the production and engineering department, process engineer, foreman, technician · two seals

PRODUCTXADO technology®treatment of the compressor cylinder-piston group

TEST OBJECTEK4B-M compressorserial no. 16484 · cylinders I and II

DOCUMENT TYPETechnical report
of the Fili electric depot

Key results

↓4.8%

compressor current draw, 8.3 → 7.9 A

↑36%

compressor output by reservoir charging time, 2 min 32 s → 1 min 52 s

EQUIPMENT	CONDITION AT THE START OF TESTS	WHAT WAS MEASURED
EK4B-M compressor, serial no. 16484	Worn parts of the cylinder-piston group	Current draw · reservoir charging time · geometry of cylinders I and II

Compressor operating mode: current and reservoir charging

PARAMETER	BEFORE TREATMENT	AFTER TREATMENT
Current draw	8.3 A	7.9 A
Reservoir charging time from 0.0 to 4.0	2 min 32 s	1 min 52 s

The measurement mode before and after is identical. From these figures the report records a 5 % reduction in power consumption and a 36 % gain in output.

Compressor cylinder geometry — the cause of everything else

MEASUREMENT POINT	CYL. I, BEFORE	CYL. I, AFTER	CYL. II, BEFORE	CYL. II, AFTER
Horizontal, 1	0.150	0.145	0.130	0.125
Horizontal, 2	0.150	0.150	0.140	0.130
Horizontal, 3	0.130	0.130	0.160	0.130
Vertical, 1	0.130	0.130	0.170	0.145
Vertical, 2	0.150	0.135	0.170	0.150
Vertical, 3	0.150	0.120	0.150	0.120

Values are given as in the table of the report. Of the 12 measurement points, 9 decreased and none increased.

Conclusion of the report

The technical report of the Fili electric depot of the Moscow Metro states: "Restoration of the geometry of worn parts has been performed". The compressor arrived for treatment worn, and the coating grown on the friction surfaces returned the cylinders to their geometry — hence everything else: the current draw fell from 8.3 to 7.9 A, and the reservoir charging time from 2 min 32 s to 1 min 52 s, "which corresponds to: a 5% reduction in power consumption and an increase in output of 36%". The measurements were taken ahead of time: the compressor "had run 280 engine hours instead of the 350 required", and the report concludes — "Consequently the effect of applying XADO technology will be improved". The economic effect, excluding the restoration of worn parts, is estimated by the report at 41 %.

The results relate to the EK4B-M compressor, serial no. 16484, of the Fili electric depot of the Moscow Metro and to the measurement modes recorded in the report; on other equipment and under other operating modes the figures may differ. The original technical report of 15.09.2000 with signatures and seals is published in full and available for download.

Current equivalent

Revitalizant gel for compressors and bearingsCompressors · bearings · spindles
Revitalizant gel for cylinder restorationEngine cylinders, deep wear

How such units are treated: Compressor Cylinder-piston group

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