Sun Yeh OM series quarter-turn (part-turn) electric valve actuators are designed to provide torque ranges from 35 Nm to 4500 Nm. The users determine a proper model per load requirement.
Planetary gearing is utilized with self-locking to prevent valves from being back-driven and provide actuators with stable and reliable operation.
ISO 5211 flange connection is used for mounting actuators to valves and a raised mechanical position indicator is used to enable the operators to identify the valve position. The most distinctive design is clutch-less manual override (except for BM-2 and OM-A). The clutch-less design allows the actuators to switch from electrical control to manual operation without needing a clutch or brake.  This makes the operation easier, increases the mechanical reliability, and reduces the failure rate of the actuators.
| Model | Torque (Nm) | Torque (in-lb) | Size of Output Drive (mm) | Depth of Output Drive (mm) | Flange (ISO 5211) | Run Time (sec / 90°) | Manual Override | Weight (kg) | Weight (lb) | 
|---|---|---|---|---|---|---|---|---|---|
                  
                     
                    OM-1 | 
                                35 | 310 | 🟐 14 | 17 | F03 / F05 | 12 | Lever | 2 | 4.4 | 
                  
                     
                    OM-A | 
                                50 | 445 | 🟐17 | 20 | F05 / F07 | 27 | N/A | 3 | 6.6 | 
                  
                     
                    OM-AM | 
                                50 | 445 | 🟐17 | 20 | F05 / F07 | 27 | Lever | 3 | 6.6 | 
                  
                     
                    OM-F | 
                                65 | 575 | 🟐22 | 30 | F07 / F10 | 6 | Hand-Wheel | 11 | 24.3 | 
                  
                     
                    OM-J | 
                                80 | 708 | 🟐17 | 20 | F05 / F07 | 130 | Lever | 3 | 6.6 | 
                  
                     
                    OM-2 | 
                                90 | 800 | 🟐22 | 30 | F07 / F10 | 17 | Hand-Wheel | 10.5 | 23.1 | 
                  
                     
                    BM-2 | 
                                120 | 1065 | ◼22 | 35 | F07 | 9 | N/A | 5.5 | 12.1 | 
                  
                     
                    OM-G | 
                                120 | 1065 | 🟐22 | 30 | F07 / F10 | 8 | Hand-Wheel | 11 | 24.3 | 
                  
                     
                    OM-3 | 
                                150 | 1330 | 🟐22 | 30 | F07 / F10 | 26 | Hand-Wheel | 10.5 | 23.1 | 
                  
                     
                    OM-H | 
                                300 | 2655 | 🟐22 | 30 | F07 / F10 | 24 | Hand-Wheel | 15 | 33.1 | 
                  
                     
                    OM-4 | 
                                400 | 3540 | 🟐36 | 40 | F10 / F12 | 19 | Hand-Wheel | 20 | 44.1 | 
                  
                     
                    OM-5 | 
                                500 | 4430 | 🟐36 | 40 | F10 / F12 | 26 | Hand-Wheel | 20 | 44.1 | 
                  
                     
                    OM-6 | 
                                650 | 5755 | 🟐36 | 40 | F10 / F12 | 34 | Hand-Wheel | 20 | 44.1 | 
                  
                     
                    OM-7 | 
                                1000 | 8855 | ●35 | 60 | F12 or F14 | 50 | Hand-Wheel | 36 | 79.4 | 
                  
                     
                    OM-8 | 
                                1500 | 13280 | ●35 | 60 | F12 or F14 | 51 | Hand-Wheel | 36 | 79.4 | 
                  
                     
                    OM-9 | 
                                2000 | 17710 | ●75 | 100 | F14 or F16 | 62 | Hand-Wheel | 68.5 | 151 | 
                  
                     
                    OM-10 | 
                                2500 | 22140 | ●75 | 100 | F14 or F16 | 62 | Hand-Wheel | 68.5 | 151 | 
                  
                     
                    OM-11 | 
                                3000 | 26565 | ●75 | 100 | F14 or F16 | 62 | Hand-Wheel | 68.5 | 151 | 
                  
                     
                    OM-12 | 
                                3500 | 31000 | ●75 | 100 | F14 or F16 | 62 | Hand-Wheel | 68.5 | 151 | 
                  
                     
                    OM-13 | 
                                4500 | 40000 | ●72 | 110 | F16 / F25 | 88 | Hand-Wheel | 102.5 | 226 | 
Note: Run time is specified under 110 VAC / 60 Hz ON-OFF control with 30% duty cycle.