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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
62
61
60
1
3
µC
2
>750°
TC
200 m
3
BCU 570..C1
Leakage rate
=
Q
47 48
L
1000 x 1 m
Test volume V
= 1.1 l + 9.5 m x 3.3 l/m = 32.45 l,
p1
see page 46 (Test volume Vp1)
PZL
PDZ
BCU 460, BCU 465 · Edition 11.19
= 200 m
3
/h.
VAS 665
V
p1
9.5 m
DN65
/h x 1000 l/h
= 200 l/h
3
/h
Measurement time for one test volume V
2 x 50 mbar x 32.45 l
t
[s] =
M
Set the next highest value (20 s) using parameter 56, see page 101
(Measurement time for Vp1).
p1
= 16.23 s
200 l/h
47
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