A global brand of quality electric actuators from 50Nm to 260Nm
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S Series of quarter turn Failsafe electric actuator series
Sun Yeh offer the S series mechanical spring return electric actuator. Rather than offering the standard / typical battery spring return system, Sun Yeh have opted to offer the mechanical spring return actuator which can be normally open or normally closed. The S series is also available as modulating failsafe and also has ATEX approval.
In additional to the normal
function, these actuators are designed to provide fail-safe positioning of
valves and dampers upon loss of supply voltage. A mechanical spring set is
utilized to position the controlled device to either the fully OPEN or fully CLOSED
position without any external power source. A mechanical BUFFER employed at the
end of the spring stroke for two-position control units to reduce the dynamic
effects of the spring return system.
A clutchless, leverless manual override
design provides full-time manual positioning of the controlled device. The
design has already won the new patent in Taiwan, U.S.A., Japan and China
For the first time we are now pricing the full range of Sun Yeh S Series failsafe electric actuators online for purchase. Make your selection from the models shown below. See Accessories tab within product page for pricing on additional features such as ATEX approval and modulating controller.
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| Type |
Spring Return Failsafe Electric Actuator |
| Voltage |
24VAC/DC |
| Current Rating |
50W |
| Cycle Time |
1-2 Seconds via mechanical spring |
| Actuator Temperature Rating |
-30C to +65C |
| Duty Cycle |
35% |
| Enclosure |
Aluminium |
| Enclosure Rating |
IP67 |
| Electrical Connections |
2 x M20 Conduit cable entry, internal termnial strip |
| Actuator Feedback |
2 x SPDT end of travel limit switches |
| Manual Override |
Available as optional extra - see 'Accessories Tab' |
| Motor Protection |
Thermal motor protection |
| Anti-Condensation Heater |
Included as standard |
| Approvals - Actuator |
Nema 4x, CSA approval, ATEX as an OPTION |
| Weight |
95Kg - 135Kg with manual override |
| Manufacturer |
Sun Yeh |
| Country of Origin: |
Taiwan |
* Download the latest technical documentation, 3D models and IOMs by clicking on the icons below.
| PDF |
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Download latest technical PDF Datasheet |
| IOM |
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Download Installation, Operation & Maintenance |
| CERT |
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Download product related Certification |
| 3D/2D |
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Download latest 2D Dwg or 3D Stp files |
Please note that some products might not have all of the above available, if your required download is not available from the above icons, please contact us for further assistance.
There are no associated spares for this item.