14
LONG STROKE ACTUATORS
SP120 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
SP120 ACTUATOR
2”
50 PSI
2 1/2”
30 PSI
3”
20 PSI
4”
Contact Factory
SP110 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 off against the
corresponding fluid pressure.