Home / Products / Valves / Damper Actuators Products Calibration Services DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Pressure DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Air Quality DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Air Velocity DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Flow DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Level DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Temperature DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Test Equipment DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Valves DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Miscellaneous DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Hazardous Rated DEMO 1 DEMO 2 DEMO 3 DEMO 4 DEMO 5 Series DDA & DDC Low Cost, Two-Position or Modulating Non-Spring Return Direct Coupled Actuator are non-spring return actuators that are perfect for positioning dampers and valves in HVAC systems. Designed to accept floating control signals. View More Series DDB & DDD Low Cost, Two-Position or Modulating Non-Spring Return Direct Coupled Actuator are non-spring return actuators that are perfect for positioning of dampers and valves in HVAC systems. Comes in a variety of power supplies. View More