Kromschroder FCU 500 - One Test Volume for System Tightness

FCU 500, FCU 505 · Edition 02.17 39
Valve proving system
7.1.3 One test volume for system tightness
P
Z
L
P
Z
H
F
C
U 5
00
..
C
1
µC
P
4
9
1
5
13
1
450
45
47
58
48
p
u
/
2
TC
PZ
PZL PDZ
M
>750°
ϑ
1
2
3
p
u
/2
PZ
V
p1
V1
V3
p
u
p
z
The tightness control checks the system tightness
of the test volume V
p1
between the central shut-off
valve V1, relief valve V3 and the burner valves. The
opening times of the relief valve V3 and the shut-off
valve V1 are identical.
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