Page 23 - Parker - The Handbook of Hydraulic Filtration

Filter Media Selection

P = Full flow pressure filter (equals Lubrication Systems
one filtration placement)
R = Full flow return filter (equals one Component Type Suggested Media Efficiency Number of Minimum Filter
filtration placement) Cleanliness Code Betax >200 Filter Placements* Placements
O = Off-line (flow rate 10% of reser- Ball Bearings 2 1.5 P or R, & O
voir volume equals .5 of a filtra- 16/13/11
tion placement) 2 1 P or R
* Number of filtration placements in Roller Bearings 5 2 P & R
system, more placements are the 17/14/12
option of the specifier. 2 0.5 0
Journal Bearings 5 1.5 P or R, & O
18/15/13
Gear Boxes
10 2.5 P, R & O

Hydraulic Systems

Component Type System Pressure Suggested Media Efficiency Number of Minimum Filter
Cleanliness Code Betax >200 Filter Placements Placements
2 1 P
<1000 17/14/12
5 2 P & R
Servo Valves
1000-3000 16/13/11 2 1.5 P & O
>3000 16/12/10 2 2 P & R
2 1 P
<1000 18/15/13 5 1.5 P & O
10 2.5 P, R & O
Proportional
2 1 P
Valves 1000-3000 18/14/12
5 2 P & R
2 1.5 P & O
>3000 17/14/11
5 2.5 P, R & O
5 1 P or R
<1000 19/16/14
10 2 P & R
2 0.5 O
Variable Volume
1000-3000 18/16/14 5 1.5 P or R, & O
Pumps
10 2.5 P, R & O
2 1 P or R
>3000 18/15/13
5 2 P & R
5 0.5 O
<1000 20/17/15
10 1.5 P or R, & O
Vane Pumps
5 1 P or R
Fixed Piston Pumps 1000-3000 19/17/14
10 2 P & R
Cartridge Valves
5 1.5 P or R, & O
>3000 19/16/13
10 2.5 P, R & O
10 1 P or R
<1000 21/18/16
Gear Pumps 20 2.5 P, R & O
Flow Controls 1000-3000 20/17/15 10 1.5 P or R, & O
Cylinders 5 0.5 O
>3000 20/17/14
10 1.5 P or R, & O

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