The Flowserve Limitorque SMB electric actuator is engineered for demanding and critical service applications in industries such as nuclear and thermal power, water management, and oil & gas.
| Mounting | MSS Standard |
| Thrust Range | 36 to 2,224 kN (8000 to 500,000 lbf) |
| Sizes | SMB-000 to SMB-5XT |
| Type | Intrusive Multi-Turn Manual/Electric Actuator for Severe Services |
| Motor | <ul><li><strong>Type:</strong> Squirrel-Cage Induction</li><li><strong>Power Supply:</strong> Suitable for 3/60/230v, 460v or 575v; 3/50/380v; or 3/50/415v</li><li><strong>Insulation:</strong> Class F Standard</li></ul> |
| Controls Options | <ul><li>NCU (No Controls Actuator) – No additional controls included</li><li>INT (Integral Controls) – Includes transformer and reversing contactor</li></ul> |
| Output Speed Range | 10 to 250 RPM |
| Standard Materials | Housing: Cast Iron or Ductile Iron, Worm Gear: alloy Bronze, Helical Gears: Heat Treated Steel, Lubrication: MOV long-life EP, NLGI Grade 0 Grease |
| Torque Range | 20 to 81,349 Nm (15 to 60,000 ft-lb) |
| Enclosure Ratings | <ul><li>NEMA 4, Class 1, Groups C and D, Division 1, and Class II, Groups E, F, G, Division 1 and 2</li><li>Class 1, Group B service is available for most models</li><li>CSA: Class 1, Groups C and D, Division 1</li></ul> |
| Design Temperature | -29°C to 66°C |
