Rif. UMA800081C - 06/22
IT
EN
EN -
7
OMAL S.p.A.
Headquarters
: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy •
Production Site:
Via Brognolo, 12 - 25050 Passirano (BS) Italy
Ph.
+39 030 8900145 •
Fax
+39 030 8900423 • [email protected] •
www.omal.com
INSTRUCTION MANUAL
AGO: SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
DA2880 - DA8000 - SR1440 - SR4000
3) OPERATION AND ROTATION DIRECTION
a. Double acting.
The actuator pistons are mounted as shown in the figure below. This provides the maximum torque at the beginning of valve opening,
for valves that close in a clockwise direction.
Port 2 is in connection with the side chambers of the cylinder, by pressurizing such connection of a standard double-acting actuator
DA, the shaft rotates counter-clockwise to open, while port 4 is connected with the intermediate chamber and when pressurized, the
drive shaft rotates clockwise to close.
b. Spring return - normally closed
The pistons of the SR type actuators are mounted as shown in the figure below.
Caution. Install a filter on connection 2, in order to prevent the access of dust or dirt inside the actuator chambers, during the spring
action.
The remote control functionality of the actuators must be done through a direct connection with solenoid valves and the EN15714-3 -
NAMUR (VDI / VDE 3845) standard interface or with pipes screwed on the ports marked with the numbers 2 and 4.
