Dungs MPA 5111 - Page 12

11 … 68
10 … 68
Printed in Germany • Edition 02.14 • Nr. 254 722
t
test V1
= ------------------------------------------------------------------------ * 3600 s/h * 3 = 1.84 s
20 mbar * 0.44 dm
3
* In (20 mbar / (20 mbar - 12.5 mbar))
1013 mbar * 50 dm
3
/ h
Example
A DMV-D(LE) 525/11 with 20 mbars
inlet pressure is used. In this appli-
cation, the admissible leakage rate
according to EN1643 is
3
/ h. The gas
pressure detector is set to 10 mbars.
p
e
= 20mbars
V
P
= 0.44 dm
3
see Test volume table, page 12
Q
P
= 50 dm
3
/ h (determined according to DIN EN 1643)
p
S1
= 10mbars + 15 % + 1mbar switching dierence = 12.5 mbars
p
S2
= 10mbars - 15 % = 8.5 mbars
S = 3 (recommendation DUNGS)
t
P43
= 1.84 s * 16/s = 29.5
To be entered in P43: 30 or more
(corresponds to 1.88 s)
t
test V2
= ------------------------------------------------------------------------ * 3600 s/h * 3 = 1.61 s
20 mbar * 0.44 dm
3
* In (20 mbar / 8.5 mbar)
1013 mbar * 50 dm
3
/ h
t
P45
= 1.61 s * 16/s = 25.7
To be entered in P45: 26 or more
(corresponds to 1.63 s)
Valve/valves leaking
1. Switch o system
2. Check valve V1 and/or V2 for leakage
3. If leaking, replace valve V1 and/or V2.
Attention! In case of interference suppression, always observe the
application- and country-specic requirements as well.