ARCA Regler GmbH
7 Functional description
Series 814
17 / 28
11.2022 / 1.1
7
Functional description
The series 814 has been developed as a single-action, pneumatic piston
actuator for linear valves. The centrally located stem (2) is connected
through a coupling for this purpose to the operating stem of the valve.
The actuator stem (2) is precisely guided by a plain bearing (32) and the
air-pressurised pressure chamber is sealed by a special sealing element
with a wiper (33). A piston (21) is connected to the actuator stem (2), it
divides the actuator housing (11, 12, 13) into pressure and spring cham-
bers. The actuator stem (2) moves when the force applied by the actu-
ation signal air pressure is higher on one side of the piston (21) than the
force of the spring(s) (4, 5).
11
13
4
5
12
2
21
32
33
Illustration 4:
Sectional drawing
