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S&P MD Series Motorized Dampers

S&P MD Series Motorized Dampers

The S&P MD series normally closed (power open) motorized dampers for round ducts can be used to control the sequencing of outside air in forced-air systems.  The standard dampers are 24V but you can add the 120V to 24V transformer to power them with standard 120VAC.

Available in sizes 4 through 14 inch.

NORMALLY CLOSED = Closed damper when power OFF

model description usually ships price QTY
MD4 S&P motorized backdraft damper for 4" round duct. Normally closed. 24VAC motor. 1 Day. In-stock $72.00
MD5 S&P motorized backdraft damper for 5" round duct. Normally closed. 24VAC motor. 1 Day. In-stock $72.00
MD6 S&P motorized backdraft damper for 6" round duct. Normally closed. 24VAC motor. 1 Day. In-stock $73.70
MD8 S&P motorized backdraft damper for 8" round duct. Normally closed. 24VAC motor. 1 Day. In-stock $82.00
MD10 S&P motorized backdraft damper for 10" round duct. Normally closed. 24VAC motor. 1 Day. In-stock $97.60
MD12 S&P motorized backdraft damper for 12" round duct. Normally closed. 24VAC motor. 1 Day. In-stock $106.30
MD14 S&P motorized backdraft damper for 14" round duct. Normally closed. 24VAC motor. 1 Day. In-stock $113.70
T120-24V S&P 120VAC to 24VAC transformer. For use with MD series dampers. 1 Day. In-stock $20.60
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Soler Palau MD Damper

Soler Palau MD Damper Specifications

Soler Palau MD Damper Dimensions

Do you have questions about the products on this page?

Click on the ? image on the left or this link to ask us your questions!
#1 Q:   How often does the MD6 exchange in outside air? How is this controlled and is there a way to turn it off during extreme outside temperatures?
A:   This is just a motorized damper. It is normally connected to a controller for on/off operation. Take a look at the MD6-ES24VK damper and controller kit: https://www.hvacquick.com/products/commercial/Commercial-Fans/Makeup-Air-Fans/S-P-MD6-ES24VK-Outside-Air-Motorized-Damper-Kit

       Asked on 2024-01-13 by TW
#2 Q:   How long does it take for the damper to fully open?
A:   3-4 seconds actuation time.

       Asked on 2023-05-01 by Matt
#3 Q:   What is the actuators Operating Temperature Range and Torque? Is the actuator made for both 24VAC and 24VDC?
A:   These need to be kept under 104F and are for 24vac. Torque values are not provided nor did the factory know.

       Asked on 2023-01-16 by FM
#4 Q:   When closed, does this damper form an airtight seal?
A:   Depends on your definition of airtight. The blade closes against a rubber seal.

       Asked on 2022-05-16 by AA

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