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Damper                                        ActuatorsThe materials included in this compilation are for the use of Dwyer...
TopicsKey Selling Features (DDA, DDC, DDB, DDD)ApplicationsQuestions
DDADirect Mounted17-70 in-lb (2-8Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection
DDAPush Button ManualOverrideFloating Controlsignal on the DDALife expectancy of60,000 cyclesAdjustable angle ofrotation u...
DDCDirect Mounted17-70 in-lb (2-8Nm)Actuator Travel IndicatorMagnetic ClutchOverload ProtectionPush Button ManualOverride
DDCModulating 4-20mA or0-10 VDC controlPosition feedback signalLife expectancy of60,000 cyclesAdjustable angle ofrotation ...
DDA and DDC
DDBDirect MountedThru shaft design88-265 in-lb (10-30Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection
DDBPush Button ManualOverrideFloating Controlsignal on the DDBLife expectancy of60,000 cyclesAdjustable angle ofrotation u...
DDDDirect MountedThru shaft design88-265 in-lb (10-30Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection
DDDPush Button ManualOverrideModulating 4-20mA or0-10 VDC controlPosition feedback signal.Life expectancy of60,000 cyclesA...
DDB and DDD
ApplicationsDamper Control in Building AutomationSystems  Air Handlers  VAV Boxes
VAV BoxesA VAV (variable air volume)box controls the air additionto a room or zone dependingon temperatureA damper inside ...
VAV Box with ReheatApplication with anactuator controllingthe damper andgiving positionfeedback
VAV Box In a BAS SystemNegativePressure Room  Has VAV Box  on air inlet
Bypass Dampers A Bypass Damper isa pressure relief valveplaced between thesupply and returnducts of the forcedair duct work.
Bypass DampersAs Zone dampers start closing,the bypass damper will openand divert some of the supplyair to the return.This...
Air HandlersThe air handler decides how much air to reuse,bring in new, and exhaust in a buildingDampers control the airfl...
QuestionsTo order a free catalog or for more information contact;       Dwyer Instruments, Inc., P.O. Box 373,            ...
Damper Actuators
Damper Actuators
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Damper Actuators

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Damper Actuators

  1. 1. Damper ActuatorsThe materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2011 Dwyer Instruments, Inc.
  2. 2. TopicsKey Selling Features (DDA, DDC, DDB, DDD)ApplicationsQuestions
  3. 3. DDADirect Mounted17-70 in-lb (2-8Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection
  4. 4. DDAPush Button ManualOverrideFloating Controlsignal on the DDALife expectancy of60,000 cyclesAdjustable angle ofrotation up to 95degrees
  5. 5. DDCDirect Mounted17-70 in-lb (2-8Nm)Actuator Travel IndicatorMagnetic ClutchOverload ProtectionPush Button ManualOverride
  6. 6. DDCModulating 4-20mA or0-10 VDC controlPosition feedback signalLife expectancy of60,000 cyclesAdjustable angle ofrotation up to 95 degrees
  7. 7. DDA and DDC
  8. 8. DDBDirect MountedThru shaft design88-265 in-lb (10-30Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection
  9. 9. DDBPush Button ManualOverrideFloating Controlsignal on the DDBLife expectancy of60,000 cyclesAdjustable angle ofrotation up to 95degrees
  10. 10. DDDDirect MountedThru shaft design88-265 in-lb (10-30Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection
  11. 11. DDDPush Button ManualOverrideModulating 4-20mA or0-10 VDC controlPosition feedback signal.Life expectancy of60,000 cyclesAdjustable angle ofrotation up to 95 degrees
  12. 12. DDB and DDD
  13. 13. ApplicationsDamper Control in Building AutomationSystems Air Handlers VAV Boxes
  14. 14. VAV BoxesA VAV (variable air volume)box controls the air additionto a room or zone dependingon temperatureA damper inside the VAVbox controls the airflowA damper actuatormodulates the damperaccording to temperature
  15. 15. VAV Box with ReheatApplication with anactuator controllingthe damper andgiving positionfeedback
  16. 16. VAV Box In a BAS SystemNegativePressure Room Has VAV Box on air inlet
  17. 17. Bypass Dampers A Bypass Damper isa pressure relief valveplaced between thesupply and returnducts of the forcedair duct work.
  18. 18. Bypass DampersAs Zone dampers start closing,the bypass damper will openand divert some of the supplyair to the return.This prevents a pressurebuildup in the supply ductwhich can cause fan cavitation,excessive air velocities, andexcessive zone damper blow-by
  19. 19. Air HandlersThe air handler decides how much air to reuse,bring in new, and exhaust in a buildingDampers control the airflow through the airhandler Return Air from the building Outside Air from outside the building Exhaust Air from the building and exhausted to outside
  20. 20. QuestionsTo order a free catalog or for more information contact; Dwyer Instruments, Inc., P.O. Box 373, Michigan City, IN., 46361 Telephone: (800) 872-9141 or (219) 879-8000 Fax: (219) 872-9057 Internet address: www.dwyer-inst.com E-mail: info@dwyer-inst.com

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