STAINLESS STEEL ACTUATOR Simple acting
GS15-GS240
GS360-GS1920
SST_GS-NC_TORQUE TABLEFAIL TO CLOSE: SAFETY FIRST.
The canted Scotch Yoke Spring Return Actuator sealing torque increase ensures a positive valve closing with its final push.Simple acting (spring return) actuators are available also in fail to open version.
Simple acting operation cycle: 1. open position valve 2. closed position valve
TYPICAL AIR CONNECTION SCHEMA
The pistons of standard GS actuators are mounted as shown above. Although spring force is diminished, the geometry of the mechanism provides a grater torque at the end of the spring stroke. When the actuator is in the valve open position, and the springs are fully compressed, the end of travel stops can be fine adjusted. Spring Return Fail to Open actuators are required when in case of the pressurised air or electrical power supply are off the valve should be automatically opened.In the fail to open actuators the pistons are inserted into the cylinder like the Double acting version, and due to the spring force the actuator is Normally Open.Attention. Normal torque and torque performances in Spring Return Fail to Open version, due to its construction, are different from the Spring Return Fail to Close standard version.Caution. In order to avoid suction of dust or dirt inside of the actuator chamebrs 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. In accordance with the international standard ISO 5599-2 the actuator air ports connection position, location, orientation and form shall be clearly identified and market with the numerate 2 and 4.
| Type | Dn | Iso Flange | Square H11 | Shaft Depth | Datasheet |
|---|---|---|---|---|---|
| GS15 | DN40 | F03 | 9 | 10,2 | |
| GS30 | DN50 | F03/F05 | 11 | 12,1 | |
| GS60 | DN63 | F05/F07 | 14 | 16,3 | |
| GS120 | DN80 | F05/F07 | 17 | 19,3 | |
| GS240 | DN100 | F07/F10 | 22 | 24,3 | |
| GS360* | DN115 | F10/F12 | 27 | 29,5 | |
| GS480* | DN125 | F12/F16 | 36 | 38,5 | |
| F14 | |||||
| GS720* | DN145 | F12 | 36 | 38,5 | |
| F14 | |||||
| GS960* | DN160 | F12/F16 | 46 | 48,5 | |
| GS1920* | DN208 | F14 | 46 | 49,5 | |
| F16 |
*Sizes available also in carbon steel, coating on demand.