B-320-2-E
5
■
Pneumatic Circuit
LW76E
EXH
EXH
OUT2
IN
OUT1
SV
MV
V
1
V
2
V
3
EXH
EXH
OUT2
IN
OUT1
SV
MV
V
1
V
2
V
3
EXH
EXH
OUT2
IN
OUT1
SV
MV
V
1
V
2
V
3
EXH
EXH
OUT2
IN
OUT1
SV
MV
V
1
V
2
V
3
IN
IN
IN
IN
Coupled with a double torque cylinder ball valve
<Not in operation>
<Metering under
initial flow control>
<Metering through
fully open valve>
<Metering under
final flow control>
SHUTOFF VALVE
SIGNAL
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
SIGNAL
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
SIGNAL
AIR SOURCE
SIGNAL
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
SHUTOFF VALVE
AIR SOURCE
Fig. 5.4
Metering Action
Output Signal
Shutoff Valve
OUT1
OUT2
V
V
2
V
3
Valve position
Not in operation
0
0
0
0
Closed
Metering (initial flow control)
0
0
SV open
Metering (fully open)
0
SV, MV open
Metering (final flow control)
0
0
SV open
NOTE: Pressure at individual port
0 - Air pressure not supplied
1 - Air pressure supplied
