Shut-off damper with pneumatic actuator
Consists of a DTU damper with a pneumatic actuator installed. The actuator consists of a glass-reinforced polyamide housing with an internal rolling diaphragm to which the spindle is fixed.
When air pressure rises, the actuator spindle is forced out and operates the blade via a lever. When air pressure falls, the actuator spindle retracts under the tension of the return spring. The damper blade is closed when delivered, and the actuator fully retracted.
There is a separate assembly, measuring, balancing and maintenance instruction for this product.
Ø 250–315 fullfills pressure class C in closed position.