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Manual 35076
LESV II
Woodward
24
Soft Stop Spring
Integral to the actuator is a soft stop spring. This provides a bumper like action if the actuator is driven
hard into the fully extended position. This will occur only on loss of power, certain wiring faults, and in rare
cases, internal fault conditions within the positioner. The soft stop mechanism is not used when the
positioner is controlling the actuator. Although the positioner will rapidly drive the actuator towards the
minimum position, it also decelerates the actuator as the actuator approaches the mechanical minimum
stop. Under the control of the positioner, the actuator should not reach the mechanical minimum stop at a
high velocity.
Valve Portion: SonicFlo
The SonicFlo contoured plug valve consists of a valve housing, metering plug, diverging sleeve, pilot
sleeve/bonnet, and actuator adapter. The metering elements of this valve are a contoured plug and a
hardened seat. The plug is contoured to provide various Cg versus position flow characteristics from 0%
to 100% stroke. Please contact Woodward for available trim sizes and Cg profiles.
LESV II Pressure Ratio Operational Limitations
For the 6 inch LESV II in trim sizes of 6600 and 7500 Cg only, if the inlet pressure to the valve exceeds
700 psig, the pressure ratio across the valve must fall within the allowable range as outlined in the chart
below.
For all other trims sizes, there are no pressure ratio limitations up to the full rated pressure of 955 psig.
Figure 2-1. 6-Inch LESV II Operating Envelope
0
10
20
30
40
50
60
70
80
90
100
1.06
1.56
2.06
2.56
3.06
3.56
Va
lv
e
Po
si
ti
o
n
(%)
Pressure
Ratio
(P
inlet
/P
outlet
)
6"
LESV
II
‐
Operating
Envelope
Limitations
Apply
to
6600Cg
and
7500Cg
Trims
Only
955 Psig Inlet Pressure
870 psig Inlet Pressure
Acceptable
Operating Range
Released
Содержание Large Electric Sonic Valve II
Страница 14: ...Manual 35076 LESV II Woodward 12 Figure 1 1 Optional SIL2 Flow Sensor 3 4 6 inch LESV II Released...
Страница 15: ...Manual 35076 LESV II Woodward 13 Figure 1 2a Outline Drawing 2 Inch LESV II UHR SST 600 Dual Resolver Released...
Страница 16: ...Manual 35076 LESV II Woodward 14 Figure 1 2b Outline Drawing 2 Inch LESV II UHR SST 600 Dual Resolver Released...
Страница 17: ...Manual 35076 LESV II Woodward 15 Figure 1 3a Outline Drawing 3 Inch LESV II Class 600 Released...
Страница 18: ...Manual 35076 LESV II Woodward 16 Figure 1 3b Outline Drawing 3 Inch LESV II Class 600 Released...
Страница 19: ...Manual 35076 LESV II Woodward 17 Figure 1 4a Outline Drawing 4 Inch LESV II Class 600 Released...
Страница 20: ...Manual 35076 LESV II Woodward 18 Figure 1 4b Outline Drawing 4 Inch LESV II Class 600 Released...
Страница 21: ...Manual 35076 LESV II Woodward 19 Figure 1 5a Outline Drawing 6 Inch LESV II Class 600 Released...
Страница 22: ...Manual 35076 LESV II Woodward 20 Figure 1 5b Outline Drawing 6 Inch LESV II Class 600 Released...
Страница 40: ...Manual 35076 LESV II Woodward 38 Figure 3 11 Cable Motor Resolver 1 Feedback Signal Released...
Страница 41: ...Manual 35076 LESV II Woodward 39 Figure 3 12 Cable Stem Shaft Resolver LVDT Feedback Signal Released...
Страница 42: ...Manual 35076 LESV II Woodward 40 Figure 3 13 Cable Motor Resolver 2 Feedback Signal Released...
Страница 43: ...Manual 35076 LESV II Woodward 41 Figure 3 14 Cable Motor Power 2 Inch LESV II LELA1 with DVP5k Released...
Страница 63: ...Manual 35076 LESV II Woodward 61 Declarations Released...
Страница 64: ...Manual 35076 LESV II Woodward 62 Released...
Страница 65: ...Manual 35076 LESV II Woodward 63 Released...