McDonnell & Miller

McDonnell Miller controls for every boiler room and flow switches application. Order complete McDonnell Miller low water cutoff and other controls along with replacement head mechanisms and repair parts. All the McDonnell Miller products are on-the-shelf ready for same-day shipping from distribution centers in Minnesota, Illinois and Florida. Choose from a wide selection of McDonnell-Miller low water cut-offs, water feeders, pump controllers, flow switches and all the repair parts!

McDonnell & Miller Controls Documentation

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  1. McDonnell Miller Air Flow Switch Model AF1

    McDonnell Miller Air Flow Switch Model AF1

    SKU: MH1130

    Air flow switch for general purpose medium and high velocity requirements. Brass paddle fits minumum 8" duct size or 6" if paddle is trimmed. 120 volt single pole double throw snap switch. Sensitivity adjustment screw for easy flow adjustment. Maximum temperature 300 degrees F, and velocity of 2500 fpm. Learn More
    $208.55
  2. McDonnell Miller Air Flow Switch Model AF1S

    McDonnell Miller Air Flow Switch Model AF1S

    SKU: MH1131

    Air flow switch for general purpose medium and high velocity requirements. Stainless steel paddle fits minumum 8" duct size or 6" if paddle is trimmed. 120 volt single pole double throw snap switch. Sensitivity adjustment screw for easy flow adjustment. Maximum temperature 300 degrees F, and velocity of 2500 fpm. Learn More
    $310.40
  3. McDonnell Miller Air Flow Switch Model AF2

    McDonnell Miller Air Flow Switch Model AF2

    SKU: MH1134

    Air flow switch for general purpose low velocity requirements. Brass paddle fits minumum 8" duct size. 120 volt single pole double throw snap switch. Sensitivity adjustment screw for easy flow adjustment. Maximum temperature 300 degrees F, and velocity of 2000 fpm. Learn More
    $164.90
  4. McDonnell Miller Air Flow Switch Model AF3

    McDonnell Miller Air Flow Switch Model AF3

    SKU: MH1135

    Air flow switch for general purpose low velocity requirements. Brass paddle fits minumum 8" duct size or 6" if paddle is trimmed. 120 volt single pole double throw snap switch. Sensitivity adjustment screw for easy flow adjustment. Maximum temperature 275 degrees F, and velocity of 2000 fpm. Learn More
    $160.05
  5. McDonnell Miller Air Flow Switch Model AF3D

    McDonnell Miller Air Flow Switch Model AF3D

    SKU: MH1135A

    Air flow switch for general purpose low velocity requirements. Brass paddle fits minumum 8" duct size or 6" if paddle is trimmed. 120 volt double pole double throw snap switch. Sensitivity adjustment screw for easy flow adjustment. Maximum temperature 275 degrees F, and velocity of 2000 fpm. Learn More
    $208.55
  6. McDonnell Miller Air Flow Switch Model AFE1

    McDonnell Miller Air Flow Switch Model AFE1

    SKU: MH1136

    Air flow switch for general purpose medium velocity requirements and hazardous environment. Brass paddle fits minumum 8" duct size. 120 volt single pole double throw snap switch. Sensitivity adjustment screw for easy flow adjustment. Maximum temperature 275 degrees F, and velocity of 2000 fpm. Learn More
    $703.25
  7. McDonnell Miller Bellows Assembly #BA-51-05

    McDonnell Miller Bellows Assembly #BA-51-05

    SKU: MI1265A

    Replacement bellows assembly for number 51, 51-2, 51S and 51S-2 controls. This part connects to the float on one end and to the valve mechanism on the other. New replacement requires the float be replaced also (MI1275). Learn More
    $218.50
  8. McDonnell Miller Bellows Assembly #BA-53-05

    McDonnell Miller Bellows Assembly #BA-53-05

    SKU: MI1293A

    Replacement bellows bracket assembly only for number 53 and 53-2 controls. This part connects to the float on one end and to the valve mechanism on the other. Learn More
    $218.50
  9. McDonnell Miller Bellows Assembly #BA-551-05

    McDonnell Miller Bellows Assembly #BA-551-05

    SKU: MI1293D

    Replacement bellows assembly only for number 551S controls. This part connects to the float on one end and to the valve mechanism on the other. Learn More
    $256.50
  10. McDonnell Miller Bellows Assembly #SA150-106R

    McDonnell Miller Bellows Assembly #SA150-106R

    SKU: MI1360

    Replacement bellows assembly between switch and float housing for all 150 and 150-S series controls. Learn More
    $171.00
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