EB 3009 EN
9
Operation
This mounting position must be adhered to;
otherwise the safe functioning of the regula-
tor cannot be guaranteed.
4.3 Strainer
A strainer installed upstream in the flow pipe
holds back any dirt or other foreign particles
carried along by the medium. For example,
the SAMSON Type 2 N/2 NI Strainer is suit-
able (
u
Î
Do not use the strainer to permanently
filter the process medium.
Î
Install a strainer upstream of the regula-
tor.
Î
The flow of direction must correspond
with the direction indicated by the arrow
on the valve body.
Î
The filter element must be installed to
hang downward.
Remember to leave enough space to remove
the filter element for cleaning.
4.4 Shut-off valve
Install a hand-operated shut-off valve both
upstream of the strainer and downstream of
the regulator (see Fig. 2). This allows the
plant to be shut down for cleaning and
maintenance, and when the plant is not used
for longer periods of time.
Tip
4.5 Pressure gauge
Install a pressure gauge both upstream and
downstream of the regulator to monitor the
pressures prevailing in the plant.
5 Operation
5.1 Start-up
First start up the regulator after mounting all
parts.
Î
For steam applications, make sure that
the pipelines are dry. Moisture will dam-
age the inside of the valve.
Î
Ensure that all valves downstream of the
regulator are open.
Î
Open the shut-off valves preferably start-
ing from the downstream of valve. Slowly
open the valves in small steps waiting a
few minutes in between.
Î
Raise the plant pressure in steps of
5 bar/70 psi.
Î
Wait several seconds after each rise in
pressure before continuing.
The test pressure must not exceed the nomi-
nal pressure of the valve by 1.5 times on test
-
ing the pressure of the plant when the regu-
lator is already installed.
Note
NOTICE
!
