TC 1, TC 2, TC 3 · Edition 07.22
EN-7
Valves
Valve
volume
V
V
[l]
nomi-
nal size
Dn
Pipe
volume V
R
[l/m]
VG 10
0.01
10
0.1
VG 15
0.05
15
0.2
VG 20
0.10
20
0.3
VG 25
0.11
25
0.5
VG 40/VK 40
0.64
40
1.3
VG 50/VK 50
1.61
50
2
VG 65/VK 65
2.86
65
3.3
VG 80/VK 80
4
80
5
VG 100/
VK 100
8.3
100
7.9
VK 125
13.6
125
12.3
VK 150
20
150
17.7
VK 200
42
200
31.4
VK 250
66
250
49
VAS 125
0.08
VAS 240
0.27
VAS 350
0.53
VAS 665
1.39
VAS 780
1.98
VAS 8100
3.32
VAS 9125
5.39
VCS 125
0.05
VCS 240
0.18
VCS 350
0.35
VCS 665
1.15
VCS 780
1.41
VCS 8100
2.85
VCS 9125
4.34
7.3 Determining the leakage rate
If no leakage rate Q
L
is specified, we recommend the
max. possible test period/measurement time is set.
It is possible to check a specific leakage rate Q
L
using
the TC. Within the European Union, the maximum
leakage rate Q
L
is 0.1% of the maximum flow rate
Q
(n) max.
[m
3
/h].
Q
(n) max.
[m
3
/h] x 1000
1000
Q
L
[l/h] =
If a low leakage rate Q
L
is to be detected, a long test
period/measurement time must be set.
7.4 Calculation of the measurement time
A web app for calculating the measurement time t
M
is
available at www.adlatus.org.
Calculation example:
Q
max.
= 100 m
3
/h
p
u
= 100 mbar
V
P
= V
V
+ L x V
R
= 7 l
Q
L
= (100 m
3
/h x 1000)/1000 = 100,000 l/h /1000
= 100 l/h
t
M
[s] =
2,5 x p
u
[mbar] x V
P
[l]
Q
L
[l/h]
(2.5 x 100 x 7)/100 = 17.5 s
Set the next highest value (in this example 20 s).
7.5 setting the measurement time on the
device
To set the calculated measurement time, the jumper in
the device must be reconnected as described below.
1
Disconnect the system from the electrical power
supply.
2
Unscrew the housing cover.
3
Set the jumper to the position for the required
measurement time (calculation example = 20 s).
4
Position the housing cover and screw tight.
5
Mark the set measurement time t
M
on the type
label with a waterproof pen.
TC
t
M
(s) 5 10 15 20 25 30
6
Switch on the power supply.
➔
The operating signal LED flashes yellow (0.2 s
on/off). After 10 s, the TC accepts the new setting
and the LED is yellow or green, see table, page
8 (8.1 Indicators and operating controls).
7.6 Calculating the entire test period
The entire test period t
P
is made up of the measurement
times t
M
of both valves and the fixed opening time t
L
of both valves together.
t
P
[s] = 2 x t
L
+ 2 x t
M
The entire test period for this example is as follows:
2 x 3 s + 2 x 20 s = 46 s.
