Samson 3381 Series, Монтаж и эксплуатация, Страница: 24 / 48

5-2 EB 8084 EN
Installation
5.1.3 Use of the Type 3381 Si-
lencer together with
self-operated regulators
Excess pressure valves
Excess pressure valves regulate the upstream
pressure. Therefore, the excess pressure
valve can be installed and the control lines
connected as normal.
Pressure reducing valves and differential
pressure regulators
If a Type 3381 Silencer is installed down -
stream of a pressure reducing valve or differ-
ential pressure regulator, the control lines
cannot be connected to the pipeline up-
stream of the silencer. As a result, control line
kits cannot be used for pressure reducing
valves in such cases.
The high pressure can be tapped at the valve
body in differential pressure regulators in
which the valve opens or closes as the differ-
ential pressure rises and are installed in the
return flow pipe.
Both control lines must be connected exter
-
nally in differential pressure regulators in
which the valve closes as the differential
pressure rises and are installed in the flow
pipe.
Fig. 5-1 to Fig. 5-4 show the resulting instal -
lation situations.