The valve is manufactured as standard, channel version with rectangular body and external actuator. The body is made of galvanised steel and is structurally similar to a 320 mm long section of duct, with connecting flanges made in one piece with the body.
The box-type damper is made of galvanised steel and is packed inside with fire-resistant flame retardant material. A special feature of the Sigmavent-15-DD damper is the location of the actuator in a fireproof box to protect it from an open source of fire and maintain its operability.
The valves are operable in any spatial orientation.
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