ACTUATECH GD2880 Buku Petunjuk - Halaman 6

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ACTUATECH GD2880 Buku Petunjuk
INSTRUCTION MANUAL
SCOTCH–YOKE PART TURN PNEUMATIC ACTUATOR
GD2880 - GD8000 AND GS1440 - GS4000
3. OPERATION AND ROTATION DIRECTION
Double Acting.
The pistons of standard GD actuators are mounted as shown below. This provides the highest torque at the valve start opening for
valve clockwise to close. Both limit positions of the pistons travel can be fine adjusted (see pg.9).
The port 2 is in connection with the cylinder side chambers, supplying the pressurised air in port 2 the standard Double Acting actuator
drive shaft rotates counter clockwise to open, while the port 4 is in connection with the intermediate chamber and when pressurised
the drive shaft rotates clockwise to close.
Single Acting, Spring Return fail to Close.
The pistons of standard GS actuators are mounted as shown below. Although spring force is diminished, the geometry of the mechanism
provides a greater torque at the end of the spring stroke. Both limit positions of the pistons travel can be fine adjusted (see pg.9).
Caution. In order to avoid suction of dust or dirt inside of the actuator chambers during the spring action, install a filter on the port 2
The port 4 is in connection with the intermediate chamber and when pressurised the drive shaft rotate counter clockwise to open.
Important.
Special Double Acting version and Spring Return fail to open actuators with different piston positions have different rotation to close
and to open: please follow their special instructions.
ACTUATECH S.p.A
Via S. Lorenzo, 70, 25069 Villa Carcina (BS) Italy •
Ph.
+39 030 8908142 •
Fax
+39 030 8908143 • [email protected] •
www.actuatech.com
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EN -
Rif. MAN80937 - 03/22