EB 8317 EN
3-3
Design and principle of operation
to the actuator is required. Refer to the asso-
ciated positioner documentation for more
details.
In the "actuator stem retracts" version, simi-
lar to Type 3271, the signal pressure is rout-
ed through the top signal pressure connec-
tion (S) to the top diaphragm chamber and
moves the actuator stem (A7) downward op-
posing the spring force.
A1
Vent plug
A2
Bottom diaphragm case
A3
Actuator stem
A10
Spring
A11
Rod
A12
Bushing
A13
Diaphragm plate
A14 Diaphragm plate
A16 Top diaphragm case
A17 Bracket
A18
Diaphragm
A26 Collar nut
A30/
A31
Stem connector clamps
A35
Pneumatic connection
A72 Rod nut
Mounting with crossbeam
Mounting without crossbeam
A31
A72
A12
•
•
•
A3
A30
A26
A10
A18
A13
A14
A11
A2
A16
A35
A1
A17
•
•
•
•
•
•
•
•
•
•
Fig. 3-1:
Functional diagram of Type 3371 Actuator with 120 cm² actuator area
A1
Top diaphragm case
A2
Bottom diaphragm case
A4 Diaphragm
A5
Diaphragm plate
A7 Actuator stem
A10
Spring
A15
Collar nut
A20
Hex bolt
A21
Hex nut
A25
Washer
A27 Compressor
A33
Stem
A40 Radial shaft seal
A41 Wiper ring
A42 Dry bearing
A50
Screw for rod (A51)
A51
Rod
A54 Rod nut
A60 Plate
A61 Pneumatic connection
S
Signal pressure
connection (stem retracts)
A61
A10
•
•
•
A1
•
A5
S
•
A2
•
•
A1
A4
A33
•
A7
•
A15
•
A51
•
A60
•
A54
•
•
A50
•
•
A25
A20
•
A21
•
A27
A41
A42
A40
Fig. 3-2:
Functional diagram of Type 3371 Actuator with 350 cm² actuator area
Содержание 3371 Series
Страница 12: ...2 2 EB 8317 EN ...
Страница 20: ...3 8 EB 8317 EN ...
Страница 24: ...4 4 EB 8317 EN ...
Страница 32: ...5 8 EB 8317 EN ...
Страница 50: ...9 10 EB 8317 EN ...
Страница 52: ...10 2 EB 8317 EN ...
Страница 56: ...11 4 EB 8317 EN ...
Страница 58: ...12 2 EB 8317 EN ...
Страница 60: ...13 2 EB 8317 EN ...
Страница 62: ...14 2 EB 8317 EN ...
Страница 64: ...15 2 EB 8317 EN 5 4 16 24 21 7 8 9 10 26 14 18 2 6 22 23 27 13 Type 3371 Actuator with 120 cm actuator area ...
Страница 69: ......