Functional Prinziple Da/Fc/Fo - GF 038 Betriebsanleitung

Pneumatic Actuator PA30-90 with Metal Butterfly Valve Type 038 and 039
4.3

Functional prinziple DA/FC/FO

FC/FO
Single-acting
Product
Function
FC: The compressed air supply causes the cylinders to
move outwards against the spring tension, until they
reach their end position. Without compressed air, the
drive is automatically closed by the spring force.
FO: The compressed air supply causes the cylinders to
move inwards against the spring tension, until they
reach the end position. Without compressed air, the
actuator is automatically opened by the spring force.
Operating
diagram
Torque characte- VALVE
CLOSED
ristics
0°
10
2 4
2
4
2
3
1
VALVE
OPEN
AIR ACTION SPRING ACTION
2
3
90°
DA
Double-acting
2
The port 2 is in connection with the cylinder side
chambers. Supplying pressurised air in port 2, the
actuator drive shaft rotates counter clockwise to open.
While the port 4 is in connection with the pressurised
intermediate chamber, the drive shaft rotates clockwise
to close.
VALVE VALVE
CLOSED
CLOSED
AIR ACTION
0° 0°
Instruction Manual
4
2
4
2 4
5 1 3
VALVE
OPEN
AIR ACTION
2
3
90°
VALVE
CLOSED
0°