Technical Section
   Pressure Ratings for Sight Glasses
 
Conditions of testing: 20-25° C, standard hydraulic oil with viscosity of 68, relative humidity 50%, slow increase of pressure.
 

EN 541 Series

Diameter Bar

PSI

9 25 363
11 25 363
14 20 290
18 17 245
19 17 245
20 17 245
22 17 245
25 17 245
30 7 102
 

GN 743, GN 743.1, GN 743.6, GN 743.7 and GN 743.8, Series

Diameter Bar

PSI

11 50 725
14 50 725
18 25 363
24 20 290
32 12 174
 

GN 744 Series

Diameter Bar

PSI

14 15 218
18 15 218
24 3.5 51

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