
22 … 72
MC • Edition 05.20 • Nº 279 663
23 … 72
10. Function SAV
The SAV protects downstream components against pres
-
sures that are too high or too low. Automatically interrupts
the flow of gas, as soon as the pre-set triggering pressure
falls below or exceeds a limit due to a fault. Under normal
operating conditions the SAV is open.
If the outlet side of the gas pressure regulator and/or the
fittings and devices of the succeeding gas line section,
inclusive its equipment until the gas-consuming device,
are not designed for the highest supply pressure (inlet
pressure to the gas pressure regulator in case of an er
-
ror), a SAV must be installed to shut down the gas supply
before the gas pressure becomes too high.
The SAV complies with the requirements of the standard.
EN 14382 as an integral resistance type (IS) safety shut-
off device.
Main components
A Valve disc
B Closing spring
C Ball catch / trigger mechanism
D Chamber with the pressure to be monitored
E Working diaphragm
F Push rod
G Setpoint spring for p
do
H Setpoint spring for p
du
I Protective cap
Function
Chamber D is connected to the outlet pressure via a
pulse line.
The pressure to be controlled acts on the working mem
-
brane E. The force of the set point springs G
and
H acts
as a counter force.
In case of an unbalance of forces (overpressure or un
-
derpressure), the SAV is actuated and the gas supply is
blocked.
A
B
C
D
E
F
G
H
I
Содержание 279042
Страница 14: ...14 72 MC Edition 05 20 Nº 279 663 A B C D E A B C D E F Type UHD F Type HD ...
Страница 15: ...MC Edition 05 20 Nº 279 663 15 72 A B C D F E A B C D E F ND MD for G2 DN40 DN50 ND for G1 G1 5 y DN25 ...
Страница 43: ...MC Edition 05 20 Nº 279 663 43 72 Type UHD X Y Q S W V M C A B D E G F J K L N P H O R U I ...
Страница 45: ...MC Edition 05 20 Nº 279 663 45 72 Type ND MD for 2 DN40 DN50 M B D E G F J K L N H X Y Q S W V O I T ...
Страница 64: ...64 72 MC Edition 05 20 Nº 279 663 14 4 Tools required A B C2 D C1 ...