Samson 4765, Монтаж и эксплуатация

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In split-range operation, the controller output
signal is split to operate two control valves in
such a way that each valve moves through
its entire travel at half the input signal each
(e.g. first control valve is set from 0.2 to
0.6 bar, the second valve from 0.6 to
1 bar). To avoid overlapping, consider a dead band (hysteresis) of +/–0.05 bar ac-
cording to Fig. 12.
The starting point (zero) is adjusted using
the zero adjustment screw (4). The reference
input span and the final value is adjusted by
the pin (2).
EB 8359-1 EN
13
Operation
Fig. 11 · Standard operation
Reference variable
Input signal
Closed
Travel
Open
Fig. 12 · Split-range operation, two valves
operating in opposite directions
Open
Travel
Closed
Valve 2
Valve 1
Dead band
Table 1
Rated travel [mm] Min./max. travel [mm] Reference variable (input signal) Range spring
Standard travels for SAMSON valves with lever I (40 to 127 mm long)
15 7.5 to 15
100 %
50 %
1
2
30 14 to 32
100 %
50 %
2
3
60 30 to 70 100 % 3
Additional travel ranges with lever I and lever extension (40 to 200 mm long)
20 7.5 to 26
100 %
50 %
1
2
40 14 to 50
100 %
50 %
2
3
> 60 30 to 90 100 % 3