Honeywell BCU 370 - Page 55

BCU 370 · Edition 01.19 55
Parameters
Calculation example for test period t
P
2 valves VG 20,
distance L = 0.5 m (19.68 inch),
inlet pressure p
u
= 50 mbar (0.725 psig),
max. flow rate Q
(N) max.
= 15 m
3
/h (425,6 ft
3
/h)
VG
L1
4
VG..
L
5
23
21
24
17
18
1
9
20
2
5
BCU 370..I1..D3
22
26
28
VG VG..L
V
p
p
u
= 50 mbar
Q
(N) max.
=
15 m
3
/h
DN 20
0,5 m
Leakage rate Q
L
=
15 m
3
/h (425.6 ft
3
/h) x 0.1% = 15 l/h (0.4256 ft
3
/h)
2 x VG 20, distance L = 0.5 m (19.68 inch)
Test volume V
P
= 0.12 l + 0.5 m x 0.3 l/m = 0.27 l (0.28 qt)
Calculated test period:
t
P
[s] = 4 ×
(
50 x 0.27
)
s = 7.6 s
15
Set the next highest value (10 s) using parameter 26.