Samson 3351, Монтаж и эксплуатация

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8 EB 8039 EN
Installation
Direction of flow
The direction of the medium flow in the valve
depends on the process medium and the se-
lected fail-safe action.
For fail-close valves which are used to con-
trol gases and vapors, the medium must flow
against the valve plug in the closing direc-
tion (A

B).
Except for the DN 100 version: the medium
must flow into the plug in the opening direc
-
tion (B

A).
For control applications with liquids, the me-
dium must flow into the plug in the opening
direction (B

A).
In fail-open valves, all media must flow in
the opening direction (A

B).
Control pressure and max. differential pres-
sure Δp
Table 4 shows the correlation between con -
trol pressure and max. differential pressure
Δp based on the process medium used.
5 Installation
5.1 Mounting position
Install the control valve with the actuator in
the upright position.
Flush and clean the pipeline thoroughly be-
fore installing the valve.
Note:
Make sure the valve is installed free
of stress. If necessary, support the
pipelines near the connections. Do
not attach supports directly to the
valve or actuator.
5.2 Control pressure line
Connect the control pressure line to the con-
nection (5.8) on the top diaphragm case
(5.7). Connection with G ¼ female thread.
5.3 Accessories
SAMSON provides mounting kits with addi-
tional parts to attach valve accessories (e.g.
Type 3768 Limit Switch, Type 3730 Position -
er). Specify the item number listed in Table 1
to order the suitable mounting kit from
SAMSON.
