MT/T 489-2020 in English
VALIDHydraulic axial piston pumps for mine
- Issued on:2020-07-09
- Implemented on:-
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
$400.00
$388.00
$388.00
Introduction
Interpretation of the core content of the standard
| Technical indicators | Requirements for inclined disc type | Requirements for inclined axis type |
|---|---|---|
| Volumetric efficiency (≥) | 85%-93% | 80%-88.5% |
| Self-priming capacity (kPa) | ≥16.7 | ≥30 |
| Noise (dBA) | ≤82-88 | ≤75-82 |
Key technological innovation
This standard integrates and replaces three old standards including MT/T 489-1995. The main upgraded contents are:
- Durability test requirements are increased to 400 hours full load or 250 hours overload
- New variable characteristic curve test requirements (Appendix B)
- Cleanliness index is increased by 40%, and the maximum requirement for metering pumps is ≤210mg
Implementation suggestions
Selection considerations
When selecting a model based on the nominal displacement, the following should be considered:
- The inclined axis type is more suitable for high-pressure conditions (up to 40MPa)
- The efficiency of the variable pump is allowed to be 1 percentage point lower than that of the metering pump
- The inclined axis structure is preferred in noise-sensitive environments
Maintenance points
Check the oil contamination regularly according to the requirements of Table 6. Recommendations:
- Replace the filter element every 500 hours
- Control the oil temperature within the range of 30-60℃
- If the machine is shut down for more than 72 hours, exhaust the machine before starting
Sample only — not a preview of MT/T 489-2020
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