Quarter-turn (Part-turn) Electric Actuators / OM Series
OM-2
- Torque: 90 Nm / 800 in-lb
- Motor Power: 40 W
- Manual Override: Handwheel (no clutch or brake required for switching control modes)
- Mounting Flange: ISO 5211 F07/F10
- Speed: 17 sec/90° (110VAC@60 Hz, 30% duty cycle)
- Weight: 10.5 kg/23.1 lb
| Item | OM-2 |
|---|---|
| Torque (Nm) | 90 |
| Torque (in-lb) | 800 |
| Size of Output Drive (mm) | 🟐22 |
| Depth of Output Drive (mm) | 30 |
| Flange (ISO 5211) | F07 / F10 |
| Run Time (sec / 90°) | 17 |
| Manual Override | Hand-Wheel |
| Weight (kg) | 10.5 |
| Weight (lb) | 23.1 |
Sun Yeh motorized valve actuators are designed for precision and reliability. OM-2 model provides a torque of 90 Nm (800 in-lb) and is powered by a 40W motor, ensuring optimal performance for valve operations. Its enclosure, made from polyester powder-coated aluminum alloy, meets NEMA Type 4X, IP66, and IP67 standards, making it ideal for outdoor applications. The actuator incorporates an insulation class F motor and a built-in thermal protector for enhanced safety and durability. Users can select from a range of voltages and customization options to configure the actuator to their specific requirements.
The OM-2 motorized valve actuator features a planetary gear with a worm drive, providing self-locking capability and preventing backlash. Equipped with a mechanical position indicator and manual override, it ensures ease of operation and high mechanical reliability.
Enclosure
- Polyester powder-coated aluminum alloy.
- NEMA type 4X, IP66 & IP67, intended for outdoor use.
- ISO 12944-2 corrosivity category C3. C4/C5 is optional.
Motor
- Insulation class F
- Built-in thermal protector prevents the motor from overheating and burnout.
- Thermal trip temperature:
AC motor: 125±5℃ (257±9℉)
DC motor: 90±5℃ (194±9℉)
Duty Cycle
- Standard: 30% duty cycle
- Optional: 75% duty cycle
Position Indication
- A mechanical position indicator is located on the top of the actuator.
Manual Override
- Non-clutch design allows for manual operation without needing a lever, clutch, or brake when the power goes out.
- When electric motor is operating, the hand-wheel will not rotate to ensure personal safety.
Gear Train
- High-alloy steel planetary gears are used, and a self-locking function is provided.
- The gears are lubricated for life with high-temperature grease.
Conduit Entry
- Standard: 1/2" PS
- Optional: 3/4" PF, 3/4" NPT, 1/2" NPT, M20
Voltages
- 12V DC
- 24V AC/DC
- 110 - 120V AC
- 220 - 240V AC, 1 Phase
- 220 - 240V AC, 3 Phase (Modulating control units require the optional Local Control Unit)
- 380 - 415V AC, 3 Phase (Modulating control units require the optional Local Control Unit)
- 440 - 480V AC, 3 Phase (Modulating control units require the optional Local Control Unit)
Travel Angle
- Standard: 0° to 90°
- Optional: up to 270°
Operating Condition
- Ambient temperature: -30℃ to +65℃ (-22℉ to +149℉)
- Relative humidity: 30% to 95%
- CE
- CSA
Anti-condensation Heater
The heater warms actuators to prevent lubricant freezing and moisture damage.
● Not recommended if ambient temperature exceeds 35℃ (95℉).
● For large day/night or seasonal temperature variations, use with a thermostat is recommended.
Heater Thermostat
Heater thermostat switches off the heater when the internal temperature of actuators is higher than 25±5˚C (77±9˚F).
Auxiliary Limit Switches
Actuators come standard with two limit switches, LS1 for fully-open and LS2 for fully-closed positioning. Two auxiliary limit switches (LS3 & LS4) are optional for fully-open and fully-closed position feedback.
Analog Output
Recommended to use with an on-off/floating control actuator for position indication.
● Analog output: 0-20 mA, 4-20 mA, 0-5 V, 0-10 V, 1-5 V, and 2-10 V.
＊ This image shows the 110/220V AC version.
Modulating Control
A proportional control unit, including analog input (AI), analog output (AO), and a 5kΩ potentiometer.
● Analog input: 4-20 mA, 1-5 V, and 2-10 V
● Analog output: 4-20 mA and 2-10 V
＊ This image shows the 110/220V AC version.
Extended Duty Cycle Kit (including motor)
This option is recommended for extending the actuator's duty cycle.
＊ This image shows the 110/220V AC version.
Potentiometer
Recommended to use with a floating control actuator to output signal for position indication.
● Two resistance values, 1k ohm or 5k ohm for selection.
OM-2~OM-13（1KΩ or 5KΩ）
Local Control Unit (LCU)
Two rotary selector switches are provided, LOCAL/REMOTE and CLOSE/OFF/OPEN. In LOCAL mode, the valves are directly being controlled in the field and can be operated to close, stop or open by using CLOSE/OFF/OPEN selector switch.
● Standard: IP65
● Optional: IP67
● Three phase power supply units with modulating control must be optioned with LCU.
Torque Switches
The torque switch option protects the actuator from overload. When preset torque is reached, the switch stops operation to prevent damage.
※ It must be ordered with the actuator and is factory‑installed, calibrated, and tested.
Time Delay Controller
Time delay controller enables the running time to be delayed from a standard to 30s, 60s, etc. (Max. 200s, 300s or 600s) per system requirements.
● Applicable to 110 VAC or 220V AC.
Chain Wheel Drive
To allow manual operation in high, hard-to reach locations by means of a slight pull on the sprocket chain.
Junction Box
Junction box enables external electrical connection to be done without removing actuator cover.
Isolation Relay Module
When using one control switch to operate two or more actuators, the isolation relay module is recommended.
Communication Protocol
Modbus RTU RS485.
● Suitable for 110–120V AC and 220–240V AC, with either 30% or 75% duty cycle.
Thermal Insulation Blanket
The thermal insulation blanket enables the actuator to remain operational after prolonged exposure to high temperatures. Its jacket design allows for easy removal and reinstallation.
● Working conditions:
－ Withstand exposure to 250°C (482°F) for 2 hours.
－ Withstand exposure to 300°C (572°F) for 1 hour.
● Applicable to on-off units.
Stainless Steel Enclosure
● SS316 (CF8M)
● IP68 (7 m, 72 hrs)
＊ For outline dimensional drawing of SS316 enclosure, please contact your salesperson.
IP68 Protection Rating
● IP 68 (7m, 72 hrs), according to EN 60529.
