Samson 3321 - Design and Principle of Operation; Type 3321 Globe Valve Description

14 EB 8111/8112 EN
Design and principle of operation
3 Design and principle of oper-
ation
The single-seated Type3321 Globe Valve is
preferably to be combined with the following
SAMSON actuators:
− Type3372 Electropneumatic Actuator
− Type 3371 Pneumatic Actuator
− Type3374 Electric Actuator
− Type5824/5825 Electric Actuator
The seat (4) and plug with plug stem (5) are
assembled in the body (1). The plug stem is
connected to the actuator stem (A3/A7) by a
stem connector (A30/A31) and sealed by
the spring-loaded packing (15).
The process medium ows through the valve
in the direction indicated by the arrow in the
ow-to-open direction. The plug position de-
termines the cross-sectional area between
the seat and plug.
The position of the plug is changed by the
control signal acting on the actuator.
Fig.4: Type3321 Valve, DN15
to 50/NPS½ to 2;
mounting using a cross-
beam and central nut
(FormB)
A11
A3
8
4
1
15
14
17
5
A30
98
97
96
13
A17
A25