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 $52.00
MD5 S&P motorized backdraft damper for 5" round duct. Normally closed. 24VAC motor. 1 Day. In Stock $52.00
MD6 S&P motorized backdraft damper for 6" round duct. Normally closed. 24VAC motor. 1 Day. In Stock $53.50
MD8 S&P motorized backdraft damper for 8" round duct. Normally closed. 24VAC motor. 1 Day. In Stock $59.00
MD10 S&P motorized backdraft damper for 10" round duct. Normally closed. 24VAC motor. 1 Day. In Stock $71.00
MD12 S&P motorized backdraft damper for 12" round duct. Normally closed. 24VAC motor. 1 Day. In Stock $78.00
MD14 S&P motorized backdraft damper for 14" round duct. Normally closed. 24VAC motor. 3-4 Days $83.00
T120-24V S&P 120VAC to 24VAC transformer. For use with MD series dampers. 1 Day. In Stock $16.60
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Soler Palau MD Damper

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