8
SHORT STROKE ACTUATORS
SP20 SHUT-OFF CAPABILITIES
The following table gives the approximate
maximum line pressure against which the spring
in a normally closed, air-to-open valve will hold.
VALVE SIZE SP20 ACTUATOR
1/2” 195 PSI
3/4” 50 PSI
1” AND 1 1/2” 190 PSI
2” 100 PSI
2 1/2” 60 PSI
3” 45 PSI
1 1/2"
2"
2 1/2"
3"
60
70
80
90
100
110
120
130
10 20 30 40 50 60 70 80 90 100
Air Pressure (PSI)
Line Pressure (PSI)
SP0 ACTUATOR LINE PRESSURE CURVE
The chart below illustrates the air supply which
must be available to a normally-open; air-to-
close valve in order to fully shut o against the
corresponding fluid pressure.