Honeywell Krom Schroder BCU 580 Technical Information page 35

Valve proving system
Calculation examples
2 valves VAS 665,
distance L = 9.5 m,
inlet pressure p = 50 mbar,
u
max. flow rate Q
(N)max.
VAS 665
Q =
(N) max.
3
200 m /h
p
u
= 50 mbar
15 14 13
ϑ
1
2
µC
3
>750°
TC
BCU 570..C1
200 m 3
Leakage rate
QL =
58 47 48
1000 x 1 m
Test volume V = 1.1 l + 9.5 m x 3.3 l/m = 32.45 l
M
p1
see page 34 (Test volume V
p1
PZL
BCU 580 · Edition 11.15l
= 200 m 3 /h.
VAS 665
V
p1
9.5 m
DN65
/h x 1000 l/h
= 200 l/h
3 /h
)
PDZ
Measurement time for one test volume V
Parameter 70 = 0
2 x 50 mbar x 32.45 l
t [ s ] =
M
Set the next highest value (20 s) using parameter 56,
see page 96 (Measurement time V
p1
= 16.23 s
200 l/h
).
p1
35