Centrifugal pump
It is not the flow section that is treated but the bearing assembly — through its oil bath.
Centrifugal-type pump: treatment through the oil bath of the bearing assembly
The class standard is 1.2 ml per litre; the same rate applies here, but the interval between stages is extended to 8–12 hours. Rolling bearings, oil-lubricated →
What is treated
- A serviceable pump unit with no parts worn 100% and no gross mechanical damage.
What is measured before and after
| Parameter | Instrument | How and when |
|---|---|---|
| Power consumption at no load | electricity meter, wattmeter, clamp meter | — |
| Vibration level of the bearing supports | vibrometer | In three directions, at fixed operating modes. |
| Operating temperature of the bearing housings | instrument for measuring the temperature of solids | — |
| Radial clearance in each bearing support | dial indicator with forced shaft displacement, set of feeler gauges | — |
Dosage rates
| Compound | Rate | How and when |
|---|---|---|
| Gel for compressors and bearings | 1.2 ml per 1 litre of standard oil per stage | — |
Treatment stages
- Dilute the gel in 100–200 ml of standard oil (50–60 °C) and introduce it into the oil bath of the bearing assembly.Start of the operating-time count
- The second stage is the same as the first.After 8–12 hours of operation
- The third stage is the same as the first.After a further 8–12 hours
After treatment
- The full cycle is not less than 400 hours of pump operation from the first stage.
Points to watch
- Carrier oil — 100–200 ml of clean standard oil heated to 50–60 °C.
Source: XADO applied procedure, lead engineer I. N. Sharaikin. The class standard — instruction IE-24.6-25612000-005-2008, method No. 9.