Samson 3222/2780 series Mounting And Operating Instructions - 5.1.2 Additional Fittings
26
EB 5866 EN
Mounting and start-up
Î
Locate the vent plug on the opposite side
to the workplace of operating personnel.
Risk of personal injury when the actuator
vents.
−
Install the control valve in such a way that
the actuator does not vent at eye level.
−
Use suitable silencers and vent plugs.
−
Wear eye protection when working in
close proximity to the control valve.
Î
On mounting valve accessories, make
sure that they can be operated from the
workplace of the operating personnel.
The workplace of operating personnel is the
location from which the valve, actuator and
any mounted valve accessories can be ac-
cessed to operate them.
5.1.2 Additional fittings
Strainer
We recommend installing a SAMSON
Type 2 NI Strainer upstream of the valve. It
prevents solid particles in the process medi-
um from damaging the valve.
Î
Make sure the direction of flow of the
strainer and valve are the same.
Î
Install the strainer with the filter element
facing downwards.
Î
Allow sufficient space to remove the filter.
Bypass and shut-off valves
We recommend installing a shut-off valve
both upstream of the strainer and down-
stream of the valve and setting up a bypass
line. The bypass line ensures that the plant
does not need to be shut down for service
and repair work on the valve.
Intermediate insulating piece
An intermediate insulating piece (1990-
1712) must be used under the following con-
ditions:
−
For medium temperatures from –15 °C
(red brass) or –10 °C (EN-GJS-400-18-
LT) to +5 °C (actuators according to Ta-
ble 1)
−
In networks with a constant medium tem-
perature >135 °C (TROVIS 5724-3,
TROVIS 5724-8, TROVIS 5725-3,
TROVIS 5725-7, TROVIS 5725-8,
Type 5824, Type 5825 Actuators)
−
For liquids >120 °C (TROVIS 5757-3,
TROVIS 5757-7, and Type 5857 Actua-
tors)
Î
Do not insulate the actuator and the cou-
pling nut as well.
Î
Only insulate the intermediate insulating
piece up to 25 mm at the maximum.
5.1.3 Installing the control
valve
1. Close the shut-off valve in the pipeline
while the valve is being installed.
2. Remove any protective caps from the
valve ports before installing the valve.
WARNING
!
Note