Damper Actuators

  • View
    767

  • Download
    8

Embed Size (px)

Text of Damper Actuators

  • 1. DamperActuatorsThe 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 Companys name, likeness, product names, and logos, includedwithin these compilations may not be used without specific, written prior permission from DwyerInstruments, Inc. Copyright 2011 Dwyer Instruments, Inc.

2. TopicsKey Selling Features (DDA, DDC, DDB, DDD)ApplicationsQuestions 3. DDADirect Mounted17-70 in-lb (2-8Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection 4. DDAPush Button ManualOverrideFloating Controlsignal on the DDALife expectancy of60,000 cyclesAdjustable angle ofrotation up to 95degrees 5. DDCDirect Mounted17-70 in-lb (2-8Nm)Actuator Travel IndicatorMagnetic ClutchOverload ProtectionPush Button ManualOverride 6. DDCModulating 4-20mA or0-10 VDC controlPosition feedback signalLife expectancy of60,000 cyclesAdjustable angle ofrotation up to 95 degrees 7. DDA and DDC 8. DDBDirect MountedThru shaft design88-265 in-lb (10-30Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection 9. DDBPush Button ManualOverrideFloating Controlsignal on the DDBLife expectancy of60,000 cyclesAdjustable angle ofrotation up to 95degrees 10. DDDDirect MountedThru shaft design88-265 in-lb (10-30Nm)Actuator TravelIndicatorMagnetic ClutchOverload Protection 11. DDDPush Button ManualOverrideModulating 4-20mA or0-10 VDC controlPosition feedback signal.Life expectancy of60,000 cyclesAdjustable angle ofrotation up to 95 degrees 12. DDB and DDD 13. ApplicationsDamper Control in Building AutomationSystemsAir HandlersVAV Boxes 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. VAV Box with ReheatApplication with anactuator controllingthe damper andgiving positionfeedback 16. VAV Box In a BAS SystemNegativePressure RoomHas VAV Boxon air inlet 17. Bypass Dampers A Bypass Damper isa pressure relief valveplaced between thesupply and returnducts of the forcedair duct work. 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. Air HandlersThe air handler decides how much air to reuse,bring in new, and exhaust in a buildingDampers control the airflow through the airhandlerReturn Air from the buildingOutside Air from outside the buildingExhaust Air from the building and exhausted tooutside 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) 879-8000Fax: (219) 872-9057Internet address: www.dwyer-inst.com E-mail: info@dwyer-inst.com