
The SSSMDR-501 has been qualified to 3,000 fpm (15.2m/s) and 4 in. wg (1.0 kPa) for operational closure in emergency smoke control situations, for use in HVAC system applications. Ratings Leakage: Pressure: Maximum Velocity: Temperature: Class I 4 in. wg (1 kPa) - differential pressure 3000 fpm (15.2 m/s) 350°F (177°C) depending on the actuator. Standard Construction Frame/Sleeve: Blades: Seals: Axles: Bearings: Size Limitations: Minimum Size: Maximum Size: 20 ga. (1mm) stainless stee