22
EB 2534 EN
Mounting and start-up
5.2
Installing the regulator into
the pipeline
5.2.1
Checking the installation
conditions
Risk of excess pressure damaging plant sec
-
tions due to construction-related seat leakage
through the regulator.
− Always install a safety device (e.g. safety
excess pressure valve or safety relief valve)
in the plant.
Pipeline routing
The inlet and outlet lengths vary depending
on the process medium. To ensure the regu-
lator functions properly, follow the installa-
tion instructions given below:
NOTICE
!
Table 5:
Inlet and outlet lengths
Q
a x DN
b x DN
a x NPS
b x NPS
State of process
medium
Regulator conditions
Inlet length a
Outlet length b
Gas
Ma ≤ 0.3
2
4
Liquid
Free of cavitation/w < 3 m/s
Q
Flow rate
a
Inlet length
b
Outlet length
Î
Observe the inlet and outlet lengths (see
Table 5). Contact SAMSON if the regula
-
tor conditions or state of the medium
process deviate.
Î
Install the regulator free of stress and
with the least amount of vibrations as
possible. If necessary, attach supports to
the valve.
Î
Install the regulator allowing sufficient
space to remove the regulator or to per-
form service and repair work on it.
Support and suspension
Depending on the regulator version and
mounting position, the regulator and pipe-
line must be supported or suspended. The
plant engineering company is responsible in
this case.
