Rif. UMA800081C - 06/22
IT
EN
EN -
13
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
Shaft
Internal chamber (central) supply hole
External chambers supply hole
Closed valve adjustment
1) Make sure that both chambers are not pressurized
2) Loosen the lock nuts (3 and 4)
3) Rotate the screws (5-6) in a clockwise direction if you want to decrease the closing angle, in a counter-clockwise direction if you
want to increase such angle (both screws must be rotated of the same amount)
4) Tighten the nuts (3-4)
5) Pressurize the internal chamber with the least pressure enough for the movement of the internal pistons (it can be seen precisely
from the shaft rotation)
6) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
7) Keep the actuator internal chamber pressurized.
8) Loosen the lock nuts (3-4)
9) Verify that both screws (5-6) lean on the internal piston, they will be hard to rotate, if that is not so, tighten the loose screw
(clockwise) until it touches the piston
10) Tighten the nuts (3-4)
11) Power up the actuator and operate it
12) Verify that the adjustment obtained is the desired one, otherwise repeat the operations from step 1.
