Alternating shut-off damper with electric motor – NM 24 A-F or NM 230 A-F
Consists of an extended T-piece with two linked DTU dampers and a 24 or 230 V electric motor installed.
Can be used for "by pass" ducts. This means that it replaces two conventional dampers + two couplings + one T-piece and is 20–30% shorter.
There is a separate assembly, measuring, balancing and maintenance instruction for this product.
Ø 100–400 fullfills pressure class A in closed position.