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British Hydromechanics Research Associa= tion (BHRA) - three year controlled “field” study of 117 hydrau= lic machines (injection molding, machine tools, material handling, mobile e= quipment (earth moving, etc), marine hydraulics, and test stands) with the = sole purpose of correlating fluid cleanliness to breakd= own frequency

British Hydromechanics Research Associa= tion

Copyright : Noria Corp

Ref : BHRA

*Typical New Oil

*Cat New Oil

(minimum)

*Cat recommended cleanliness level for used hydraul= ic

(or cleaner)

*Information collected by Oil Transfer Systems

 

by

= ·=   

Arbitrary base

Average

Ave. Hours

Relative

ISO

Between

Life

Code

Breakdowns

Factor

24/21

200

0.19

23/20

250

0.24

22/19

325

0.31

21/18

430

0.41

20/17

600

0.57

19/16

800

0.76

18/15

1050

1

17/14

1400

1.33

16/13

1900

1.81

15/12

2600

2.48

14/11

3800

3.52

13/10

5000

4.76

12/9

6500

6.19

11/8

9000

8.57

10/7

20,000

19.05
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