EN -
6
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.it
Rif. UMA800081A - 02/18
INSTALLATION, USE AND MAINTENANCE MANUAL
PNEUMATIC ACTUATOR “DA08”
IT
EN
3) OPERATION AND ROTATION DIRECTION
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 counter-clockwise direction.
Port 2 is in connection with the side chambers of the cylinder, by pressurizing port 2 in the standard dou-
ble-acting actuators DA, the stem rotates counter-clockwise to open, while port 4 is connected with the
intermediate chamber and when pressurized, the stem rotates clockwise to close.
The remote control functionality of the actuators must be done throu-
gh a direct connection with solenoid valves and EN15714-3 - NAMUR
standard interface (VDI / VDE 3845) or with pipes screwed on the
ports marked with the numbers 2 and 4, and connected to a separate
electrical panel
Positioning and rotation direction of the actuator
The positioning and the rotation direction of the actuator, to ensure
a maximum opening torque, must be in accordance with the EN ISO
5211standard.
4) SAFETY INSTRUCTIONS
- The actuator must be used within the specified pressure limits, operation beyond these limits may dama-
ge the internal parts of the actuator.
- The actuator operation out of the range of temperatures indicated could damage its internal or external
parts.
- Using the actuator, without the due external protection, corrosive environments may damage it.
- Before the installation, repair or maintenance be sure that the actuator is not pressurized, disconnect the
air lines and verify that they have vented.
- Do not remove the caps when the actuator is installed online or while it’s pressurized.
Содержание DA08
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