Boss 355AA, Руководство пользователя, Страница: 19 / 20

19
EN
Pressure drop diagram (calculated with P1 = 50 mbar)
Table 3
SIL LEVEL
Parameter Value
Hardware Failure Tolerance - HFT 0
Common Cause Failure - CCF in points 75
Safe Failure Fraction - SFF in % 65%
Expected Lifetime Cycles - B
10d
251278
Expected Lifetime - T
10d
[years] 87
Probability of Dangerous Failures - PFH
D
[1/h] 1.33E-07
Performance Level - PL d
Safety Integity Level - SIL 2
Mean Time to Dangerous Failure - MTTF
D
[years] 860
DESIGNED LIFETIME
Designed operating cycles (According to EN 161) Time (years)
from 100.000 to 200.000 depends on diameter 10
Table 4
Vite / Screw M5 M6 M8 M10 M12
Max. torque (N.m)
Galvanised 6 10 25 49,5 84,5
Stainless Steel 4,5 7,5 18,5 37 63,5
dv = density relative
to the air
1) methane
2) air
3) town gas
4) lpg