can adjust the air volume by regulating the inner screw with screw driver
Circular Opposed Blade Damper(HVAC,Air grille ,Air diffuser,Air register,damper,Air vent)
OBD-E are the butterfly valve which use for a circular duct for air volume control, it can adjust the air volume by regulating the inner screw with screw driver.
E-shaped is made of plastic; users need manually regulate the blades angle to control air volume.
SPEC (NECK SIZE)150160200250φ****
Remark:
Dimensions,colors,thickness,finished,designs and other specification can be customized according to customers' request.
We sincerely welcome you to contact us for business.
FOSHAN GREENAIRSYS HVAC EQUIPMENT CO.,LTD
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