AVZ-20D vacuum pump
The vacuum pump is not among the 24 procedures of the instruction — this is a separate applied development. The effect is visible in the residual pressure and the pumping speed.
AVZ-type vacuum pump (AVZ-20D) running on VM-1 vacuum oil
Vacuum pumps have no procedure of their own in the instruction. The XADO engineer set 3.0 ml per litre — twice the norm for compressors; for a new pump, a tube per stage is given instead of a share per litre. Rolling bearings, oil-lubricated →
What is treated
- A serviceable vacuum pump with no critically worn parts.
- The oil filter has been flushed or replaced.
What is measured before and after
| Parameter | Instrument | How and when |
|---|---|---|
| Pumping speed, l/s (m³/min) | standard measuring equipment | — |
| Residual pressure, mmHg | vacuum gauge | — |
| Power consumption, kW | clamp meter, wattmeter | — |
Dosage rates
| Compound | Rate | How and when |
|---|---|---|
| Gel for compressors and bearings — worn pump | 3.0 ml per 1 litre of the standard oil | Warm 100–150 ml of VM-1 oil to 40–50 °C and dissolve the gel in it. |
| Gel for power steering — new pump | 1 tube of 9 ml per stage, 3 tubes in total | Second revision of the procedure, for a pump that has not been run in. |
Treatment stages
- Add the first dose to the oil bath of the pump.Start of the operating-hours count
- Second dose.After 8 hours of cumulative operating time
- Third dose.After another 8 hours
After treatment
- Repeat measurements — after 350–400 hours of cumulative operating time.
- Pumping speed, residual pressure and power consumption are compared.
Points to watch
- Preventive re-treatment: 2 tubes in 2 stages every 2000 operating hours, and in an aggressive environment — every 1000.
- For a new pump treated on a test bench, before installation in its regular position — 30 hours under nominal load.
Source: XADO applied procedure, lead engineer I. N. Sharaikin. Class norm — instruction IE-24.6-25612000-005-2008, procedure No. 9.