The one way round dampers are made of galvanized steel and are equipped with aluminum shutters, normally closed by action of a resort, that prevent air entrance from the outside and loss of heat.
RCRF - Regulating damper
VD - Rectangular register, opposite shutters
DRL - Regulating damper
RSG - One way rectangular damper
DSL - Shut-off damper
DSL - Shut-off damper SPIRO
RCRF RF - Regulating damper - pressurization, smoke ventilation, compensation
DRL - Regulating damper SPIRO
IRIS - Regulating damper IRIS