PRODUCTION CASE|METRO|COMPRESSOR EQUIPMENT
TECHNICAL REPORT OF 15.09.2000
EK4B-M compressor: cylinders restored, faster charging, lower current
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
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: