Water supply pumps: bearings now run cooler with no shutdown or teardown

OJSC MMK im. Ilicha, water supply shop, pumping station No. 8 · reports approved by V. N. Redya, head of the water supply shop; treatment carried out by Promelektrotekhpostach

Mariupol, Ukraine · treatment on 05.12.2000 and 24-26.12.2000 · monitoring until 10.01.2001

PRODUCTXADO RVS technologyunits treated under normal operation, without teardown and without spare parts

TEST OBJECTTwo water supply pumpspump No. 4 — thrust bearings · pump D 6300 No. 16 — babbitt sleeve bearings

DOCUMENT TYPEWater supply shop reports
and economic effect calculation

What was repeated on both pumps

↓25°C

bearing temperature on both pumps, 85-90 → 60-65 and 60-65 → 35-40 °C

PUMP AND UNIT	CONDITION BEFORE TREATMENT	WHAT WAS MEASURED	TREATMENT
Pump No. 4, station No. 8 BIS — thrust bearings	Bearing housing heated up to 85-90 °C, constant water cooling was required	Bearing housing temperature	05.12.2000
Pump D 6300 No. 16, station No. 8 — babbitt sleeve bearings	Bearing was due for replacement, oil sump housing at 60-65 °C	Sump and bearing oil temperature, repair costs	24-26.12.2000

Bearing unit temperature — pump by pump

PUMP AND MEASURING POINT	BEFORE TREATMENT	DURING OPERATION	AFTER STABILIZATION	CHANGE
Pump No. 4 — thrust bearing housing	85-90 °C	70-75 °C, day 3	60-65 °C, day 5	−25 °C
Pump D 6300 No. 16 — oil sump housing	60-65 °C	50-55 °C, day 4	35-40 °C, day 10	−25 °C
Pump D 6300 No. 16 — bearing oil	65 °C	—	35 °C	−30 °C

Ambient air temperature in the pump house did not change over the monitoring period — the drop relates to the units themselves.

Sleeve bearing repair on pump No. 16 — water supply shop calculation

ITEM	CONVENTIONAL REPAIR	XADO RVS TREATMENT
Cost of repairing one bearing	411.77 UAH	96.12 UAH
Bearing replacement	required	not required
Economic effect	—	3.28 UAH per 1 UAH spent

The water supply shop calculation was signed jointly with the contractor; plant prices are from the year 2000, the effect per 1 UAH spent does not depend on them.

Conclusion of the water supply shop commission

Both pumps were treated while running — without shutting down the station, without dismantling and without spare parts. Pump No. 4 was chosen because its thrust bearing housing heated up to 85-90 °C and required constant water cooling: on the third day of operation the cooling was discontinued, on the fifth day the temperature stabilized at 60-65 °C. The bearing of pump D 6300 No. 16 was queued for replacement — after the treatment the sump temperature dropped to 35-40 °C and the oil temperature to 35 °C, and the shop calculation records: “Bearing replacement is not required”. The commission recorded in the reports: “The positive results achieved indicate reduced friction in the sleeve bearings and optimization of the shaft-to-shell clearance, which ultimately led to the temperature drop”. Equipment repair by this technology is recommended by the shop for further rollout at OJSC MMK im. Ilicha.

The results relate to the bearing units of the water supply pumps at pumping station No. 8 of OJSC MMK im. Ilicha and to their operating conditions; on other equipment the figures may differ. RVS is an obsolete XADO designation, the zero-generation compounds; the current product generation is revitalizants. The original reports and the calculation are published in full and available for download.

Current equivalent

Revitalizant gel for hydraulic systemsHydraulics · pumps · hydraulic motors
Revitalizant gel for compressors and bearingsCompressors · bearings · spindles

How such units are treated: Pump Bearings

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