Samson 4765, Монтаж и эксплуатация

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Any changes of the input signal p
e
or the
valve stem position cause the pressure up-
stream and downstream of the booster to
change. The air released by the booster (sig-
nal pressure p
st
) flows to the pneumatic actu-
ator over the volume restriction (14), caus-
ing the plug stem to take on a position cor-
responding to the reference input variable.
The adjustable tuning restrictions (13 and
14) are used to optimize the control loop.
The range spring (6) corresponds to the
rated valve travel and the nominal reference
input span. It can be exchanged.
EB 8359-1 EN
7
Design and principle of operation
1.1 1 2 2.1 20
4
6
8
9
9.1
10.2
10
10.1
11
pst
Output 36
Supply 9
pe
Input
27
6
8
9
9.1
12.2
10.1
10
12
14
13
Fig. 3 · Functional diagram
Legend for Figs. 2 and 3
1 Lever for valve travel
1.1 Shaft
2 Pin
2.1 Nut
3 Sleeve
4 Zero adjustment screw
5 Mounting screw
6 Range spring
6.1 Bracket
7 Mounting screw
8 Measuring diaphragm
9 Diaphragm lever
9.1 Feeler pin
10 Nozzle block
10.1 Nozzle
10.2 Flapper
11 Cover plate
12 Booster
13 Xp restriction
14 Volume restriction Q
15 Hole for mounting screw
20 Plate
Arrangement of nozzle/flapper for
reverse operating direction <>
Travel