الوصف

Casing and blades are made from galvanized steel sheets. There is an adjustable damper blade mounted on brass bushes with manually operated quadrant and position indicator. The damper is used for regulating air flow or as shut-off damper when complete sealing against air flow is not required. Dampers can be manual with locking quadrant or motorized with a wide range of electrical actuators readily available. Body: Galvanized steel sheet; gauge *0, from diameter *0mm to **0mm; gauge *8, above **0 diameter Blade: Plain galvanized steel sheet; gauge *8, from diameter *0mm to **0mm; gauge *6, above **0 diameter; galvanized steel perforated blade (optional) Finish: Mill galvanized. Case bearings: Brass bearing as standard; sintered bronze iolite (optional). Control shaft: *2mm diameter zinc plated mild steel. Minimum and maximum size: *0mm diameter damper up to **0 diameter are single blade construction. Note: Sizes above **0 diameter are multi-blade type.