Samson 3241, Монтаж и эксплуатация

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14 EB 8012 EN
Design and principle of operation
3 Design and principle of oper-
ation
The single-seated Type 3241 Globe Valve is
preferably combined with a SAMSON
Type 3271 or Type 3277 Pneumatic Actuator
(see Fig. 4). It can also be combined with
other actuators.
The seat (4) and plug with plug stem (5) are
assembled in the body (1). The plug stem is
connected to the actuator stem (A7) by the
stem connector clamps (A26) and is sealed
by a spring-loaded V-ring packing (16). The
springs in the pneumatic actuator (A) are lo-
cated either above or below the diaphragm
depending on the selected fail-safe action
(see section 3.1). A change in the signal
pressure acting on the diaphragm causes the
plug to move. The actuator size is deter-
mined by the diaphragm area.
The medium flows through the valve in the
direction indicated by the arrow. A rise in
signal pressure causes the force acting on
the diaphragm in the actuator to increase.
The springs are compressed. Depending on
the selected direction of action, the actuator
stem retracts or extends. As a result, the plug
position in the seat changes and determines
the flow rate through the valve.