| Hydraulic Component fluid cleanliness requirements & Fluid type selection guide |
The following components should operate in the fluid cleanliness levels indicated or better
|
| Component Type |
Operating pressures |
| <1500 psi |
1500 - 2500 psi |
>2500 psi |
| ISO 4406 Cleanliness required |
| Servo Valve |
16/14/12 |
15/13/11 |
14/12/10 |
| Proportional Valve |
17/15/12 |
16/14/12 |
15/13/11 |
| Variable Volume Pump |
17/16/13 |
17/15/12 |
16/14/12 |
| Cartridge Valve |
18/16/14 |
17/16/13 |
17/15/12 |
| Fixed Piston Pump |
18/16/14 |
17/16/13 |
17/15/12 |
| Vane Pump |
19/17/14 |
18/16/14 |
17/16/13 |
| Pressure/Flow control Valve |
19/17/14 |
18/16/14 |
17/16/13 |
| Solenoid Valve |
19/17/14 |
18/16/14 |
18/16/14 |
| Gear Pump |
19/17/14 |
18/16/14 |
18/16/14 |
|
|
|
|
| Suggested Fluid type |
AW |
AW - HVI |
HVI |
|
|
|
|
Legend
|
| "AW" is standard Anti Wear Hydraulic fluid usually with a Viscosity Index of approx 100 + |
| "HVI is High Viscosity Index Hydraulic fluid usually with a Viscosity Index of approx 150 + |
|
|
|
|
| Please note ‚ the above fluid guide is a general guide under "normal" service conditions and should be read in conjunction with Equipment Manufacturers recommendations ‚ do not confuse the Viscosity Index with the ISO Viscosity rating of a fluid |
