Samson 3510 Series - Additional Fittings; Valve Accessories

3-4 EB 8091 EN
Design and principle of operation
3.2 Additional ttings
Filter
We recommend installing a lter upstream of
the valve depending on the K
VS
coefcient. It
prevents solid particles in the process medi-
um from damaging the valve.
K
VS
coefcient Mesh size
0.0001 to 0.0063 <1µm
0.01 to 0.4 <10µm
0.63 to 1.6 ≤20µm
Bypass and shut-off valves
We recommend installing a shut-off valve
both upstream of the lter and downstream
of the valve and installing a bypass line. The
bypass ensures that the plant does not need
to be shut down for service and repair work
on the valve.
Insulation
Control valves can be insulated to reduce
heat energy transfer.
Refer to the insulation instructions in the 'In-
stallation' section.
Test connection
Versions with bellows seal tted with a test
connection (G
1
/
8
) at the top ange allow the
sealing ability of the bellows to be moni-
tored.
Particularly for liquids and vapors as well as
explosive or hazardous substances, we rec-
ommend installing a suitable leakage indica-
tor (e.g. a contact pressure gauge, an outlet
to an open vessel or an inspection glass).
Safety guard
For operating conditions that require in-
creased safety (e.g. in cases where the valve
is freely accessible to untrained staff), a safe-
ty guard must be installed to rule out a crush
hazard arising from moving parts (actuator
and plug stem). Plant operators are responsi-
ble for deciding whether a guard is to be
used. The decision is based on the risk posed
by the plant and its operating conditions.
3.3 Valve accessories
Information Sheet uT8350
A mounting kit is required to mount position-
ers, limit switches, solenoid valves etc. The
mounting kit (item no. 1400-9031) can be
ordered from SAMSON. Refer to the mount-
ing and operating instructions of the corre-
sponding device for a description on how to
mount it.