FCU 500, FCU 505 · Edition 02.17
54
Valve proving system
Test volume V
p
Test volume V
p
is calculated from the valve volume V
V
,
added to the volume of the pipe V
R
for each additional
metre in length L.
L
V
P
= V
V
+ L
x
V
R
V
P
V1
V2
Valves
Pipework
Type
Volume V
V
[l]
DN
Volume per metre
V
R
[l/m]
VAS 1
0.25
10
0.1
VAS 2
0.82
15
0.2
VAS 3
1.8
20
0.3
VAS 6
1.1
25
0.5
VAS 7
1.4
40
1.3
VAS 8
2.3
50
2
VAS 9
4.3
65
3.3
VG 10
0.01
80
5
VG 15
0.07
100
7.9
VG 20
0.12
125
12.3
VG 25
0.2
150
17.7
VG 40/VK 40
0.7
200
31.4
VG 50/VK 50
1.2
250
49
VG 65/VK 65
2
VG 80/VK 80
4
VK 100
8.3
VK 125
13.6
VK 150
20
VK 200
42
VK 250
66
The measurement time required for test volumes V
p1
and V
p2
must be set on the basis of the calculation
using parameters 56 and 57. For the calculation, see
page 55 (Calculation examples).
The measurement time can be set to a value between
3 and 3600 seconds for the test volume V
p1
, and for
V
p1
+ V
p2
.
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