MP Filtri ACMU, User Manual

Page: 31 / 50

Appendix E
Recommendations 31
Recommendations
Unit Type ISO 4406:1999 Code
PUMP Piston (slow speed, in-line) 22/20/16
Piston (high speed, variable) 17/15/13
Gear 19/17/15
Vane 18/16/14
MOTOR Axial piston 18/16/13
Radial piston 19/17/13
Gear 20/18/15
Vane 19/17/14
VALVE Directional (solenoid) 20/18/15
Pressure control (modulating) 19/17/14
Flow control 19/17/14
Check valve 20/18/15
Cartridge valve 20/18/15
Proportional 18/16/13
Servo-valve 16/14/11
ACTUATOR 20/18/15
Table I Typical Manufacturers Recommendations for Component Clean-
liness (ISO 4406:1999)
III
Most component manufacturers know the proportionate effect that increased
dirt level has on the performance of their components and issue maximum
permissible contamination levels. They state that operating components on
III
It should be noted that the recommendations made in this table should be viewed as starting
levels and may have to be modified in light of operational experiences or user requirements.