With electromotor the blades are linked to each other.Superior at low noise and stable blades adjustment .

Opposed Blade Damper(HVAC,Air grille ,Air diffuser,Air register,damper,Air vent)OBD-B is constructed by an opposed blade damper and an electromotor. The blades are linked to each other, as long as connecting to a power supply, all the blades off will move; the air ventilation and cervix area will get larger or smaller. OBD-B adopts gear adjustment. Compared with traditional products, it is superior at low noise and stable blades adjustment and so on.

SPEC   (NECK SIZE)

200

250

300

350

400

450

500

600

700

800

900

1000

100

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150

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200

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250

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300

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350

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400

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450

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500

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600

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700

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800

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900

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1000

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Opposed Blade Damper